diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1999-10-09 00:00:47 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1999-10-09 00:00:47 +0000 |
| commit | d6434e1042f3b0a6dfe1b1f615af369486f9b1fa (patch) | |
| tree | e2be02f33984c48ec019c654051d27964e42c441 /arch/sh | |
| parent | 609d1e803baf519487233b765eb487f9ec227a18 (diff) | |
Merge with 2.3.19.
Diffstat (limited to 'arch/sh')
35 files changed, 7328 insertions, 0 deletions
diff --git a/arch/sh/Makefile b/arch/sh/Makefile new file mode 100644 index 000000000..c1c6f1e29 --- /dev/null +++ b/arch/sh/Makefile @@ -0,0 +1,82 @@ +# $Id$ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# This file is included by the global makefile so that you can add your own +# architecture-specific flags and dependencies. Remember to do have actions +# for "archclean" and "archdep" for cleaning up and making dependencies for +# this architecture +# + +# +# Select the object file format to substitute into the linker script. +# +tool-prefix = sh-gniibe- +oformat = elf + +ifdef CONFIG_CROSSCOMPILE +CROSS_COMPILE = $(tool-prefix) +endif + +LINKFLAGS = # -EL # -static #-N +MODFLAGS += + +# +# +CFLAGS += -m3 # -ml +LINKFLAGS += +LDFLAGS += # -EL + +# +# +HOSTCC = cc + +# +# Choosing incompatible machines durings configuration will result in +# error messages during linking. Select a default linkscript if +# none has been choosen above. +# +LINKSCRIPT = arch/sh/vmlinux.lds +LINKFLAGS += -T $(word 1,$(LINKSCRIPT)) -e __stext + +ifdef LOADADDR +LINKFLAGS += -Ttext $(word 1,$(LOADADDR)) +endif + +# +CFLAGS += -pipe + +HEAD := arch/sh/kernel/head.o arch/sh/kernel/init_task.o + +SUBDIRS := $(SUBDIRS) $(addprefix arch/sh/, kernel mm lib) +CORE_FILES := arch/sh/kernel/kernel.o arch/sh/mm/mm.o $(CORE_FILES) +LIBS := $(TOPDIR)/arch/sh/lib/lib.a $(LIBS) $(TOPDIR)/arch/sh/lib/lib.a /home/niibe/lib/gcc-lib/sh-gniibe-elf/egcs-2.91.66/libgcc.a + +MAKEBOOT = $(MAKE) -C arch/$(ARCH)/boot + +vmlinux: arch/sh/vmlinux.lds + +arch/sh/vmlinux.lds: arch/sh/vmlinux.lds.S FORCE + gcc -E -C -P -I$(HPATH) -imacros $(HPATH)/linux/config.h -Ush arch/sh/vmlinux.lds.S >arch/sh/vmlinux.lds + +FORCE: ; + +zImage: vmlinux + @$(MAKEBOOT) zImage + +compressed: zImage + +zdisk: vmlinux + @$(MAKEBOOT) zdisk + +archclean: + @$(MAKEBOOT) clean + $(MAKE) -C arch/$(ARCH)/kernel clean +# $(MAKE) -C arch/$(ARCH)/tools clean + +archmrproper: + +archdep: + @$(MAKEBOOT) dep diff --git a/arch/sh/boot/Makefile b/arch/sh/boot/Makefile new file mode 100644 index 000000000..e2ae36bde --- /dev/null +++ b/arch/sh/boot/Makefile @@ -0,0 +1,41 @@ +# +# arch/mips/boot/Makefile +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# + +.S.s: + $(CPP) $(CFLAGS) $< -o $*.s +.S.o: + $(CC) $(CFLAGS) -c $< -o $*.o + +OBJS = + +# +# Drop some uninteresting sections in the kernel. +# +drop-sections = .reginfo .mdebug +strip-flags = $(addprefix --remove-section=,$(drop-sections)) + +# +# Fake compressed boot +# +zImage: $(CONFIGURE) mkboot $(TOPDIR)/vmlinux + $(OBJCOPY) $(strip-flags) $(TOPDIR)/vmlinux zImage.tmp + ./mkboot zImage.tmp zImage + rm -f zImage.tmp + +mkboot: mkboot.c + $(HOSTCC) -o $@ $^ + +# Don't build dependencies, this may die if $(CC) isn't gcc +dep: + +clean: + rm -f zImage zImage.tmp mkboot + +dummy: + +include $(TOPDIR)/Rules.make diff --git a/arch/sh/config.in b/arch/sh/config.in new file mode 100644 index 000000000..043af8304 --- /dev/null +++ b/arch/sh/config.in @@ -0,0 +1,78 @@ +# +# For a description of the syntax of this configuration file, +# see the Configure script. +# +mainmenu_name "Linux/SuperH Kernel Configuration" + +mainmenu_option next_comment +comment 'Code maturity level options' +bool 'Prompt for development and/or incomplete code/drivers' CONFIG_EXPERIMENTAL +endmenu + +mainmenu_option next_comment +comment 'Processor type and features' +choice 'Processor family' \ + "SH3 CONFIG_CPU_SH3 \ + SH4 CONFIG_CPU_SH4" SH3 +bool 'Little Endian' CONFIG_LITTLE_ENDIAN +hex 'Physical memory start address' CONFIG_MEMORY_START 0c000000 +endmenu + +mainmenu_option next_comment +comment 'Loadable module support' +bool 'Enable loadable module support' CONFIG_MODULES +if [ "$CONFIG_MODULES" = "y" ]; then + bool 'Set version information on all symbols for modules' CONFIG_MODVERSIONS + bool 'Kernel module loader' CONFIG_KMOD +fi +endmenu + +define_bool CONFIG_SERIAL n +define_bool CONFIG_SH3SCI_SERIAL y +define_bool CONFIG_SERIAL_CONSOLE y + +mainmenu_option next_comment +comment 'Floppy, IDE, and other block devices' + +bool 'Networking support' CONFIG_NET +bool 'System V IPC' CONFIG_SYSVIPC +bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT +bool 'Sysctl support' CONFIG_SYSCTL + +tristate 'Kernel support for ELF binaries' CONFIG_BINFMT_ELF +tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC + +tristate 'RAM disk support' CONFIG_BLK_DEV_RAM +if [ "$CONFIG_BLK_DEV_RAM" = "y" ]; then + bool ' Initial RAM disk (initrd) support' CONFIG_BLK_DEV_INITRD +fi + +tristate 'Loopback device support' CONFIG_BLK_DEV_LOOP +tristate 'Network block device support' CONFIG_BLK_DEV_NBD +endmenu + +if [ "$CONFIG_NET" = "y" ]; then + source net/Config.in +fi + +mainmenu_option next_comment +comment 'Unix 98 PTY support' +bool 'Unix98 PTY support' CONFIG_UNIX98_PTYS +if [ "$CONFIG_UNIX98_PTYS" = "y" ]; then + int 'Maximum number of Unix98 PTYs in use (0-2048)' CONFIG_UNIX98_PTY_COUNT 256 +fi +endmenu + +source fs/Config.in + +mainmenu_option next_comment +comment 'Watchdog' + +tristate 'Software watchdog' CONFIG_SOFT_WATCHDOG +endmenu + +mainmenu_option next_comment +comment 'Kernel hacking' + +bool 'Magic SysRq key' CONFIG_MAGIC_SYSRQ +endmenu diff --git a/arch/sh/defconfig b/arch/sh/defconfig new file mode 100644 index 000000000..bd830d4a9 --- /dev/null +++ b/arch/sh/defconfig @@ -0,0 +1,101 @@ +# +# Automatically generated make config: don't edit +# + +# +# Code maturity level options +# +# CONFIG_EXPERIMENTAL is not set + +# +# Processor type and features +# +CONFIG_CPU_SH3=y +# CONFIG_CPU_SH4 is not set +# CONFIG_LITTLE_ENDIAN is not set +CONFIG_MEMORY_START=0c000000 + +# +# Loadable module support +# +# CONFIG_MODULES is not set +# CONFIG_SERIAL is not set +CONFIG_SH3SCI_SERIAL=y +CONFIG_SERIAL_CONSOLE=y + +# +# Floppy, IDE, and other block devices +# +# CONFIG_NET is not set +CONFIG_SYSVIPC=y +# CONFIG_BSD_PROCESS_ACCT is not set +# CONFIG_SYSCTL is not set +CONFIG_BINFMT_ELF=y +# CONFIG_BINFMT_MISC is not set +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_INITRD=y +# CONFIG_BLK_DEV_LOOP is not set +# CONFIG_BLK_DEV_NBD is not set + +# +# Networking options +# +# CONFIG_PACKET is not set +# CONFIG_NETLINK is not set +# CONFIG_FIREWALL is not set +# CONFIG_FILTER is not set +# CONFIG_UNIX is not set +# CONFIG_INET is not set + +# +# +# +# CONFIG_IPX is not set +# CONFIG_ATALK is not set + +# +# Unix 98 PTY support +# +# CONFIG_UNIX98_PTYS is not set + +# +# Filesystems +# +# CONFIG_QUOTA is not set +# CONFIG_AUTOFS_FS is not set +# CONFIG_AFFS_FS is not set +# CONFIG_HFS_FS is not set +# CONFIG_FAT_FS is not set +# CONFIG_ISO9660_FS is not set +# CONFIG_JOLIET is not set +# CONFIG_MINIX_FS is not set +# CONFIG_NTFS_FS is not set +# CONFIG_HPFS_FS is not set +CONFIG_PROC_FS=y +# CONFIG_ROMFS_FS is not set +CONFIG_EXT2_FS=y +# CONFIG_SYSV_FS is not set +# CONFIG_UFS_FS is not set + +# +# Network File Systems +# + +# +# Partition Types +# +# CONFIG_PARTITION_ADVANCED is not set +CONFIG_MSDOS_PARTITION=y +# CONFIG_SMD_DISKLABEL is not set +# CONFIG_SGI_DISKLABEL is not set +# CONFIG_NLS is not set + +# +# Watchdog +# +# CONFIG_SOFT_WATCHDOG is not set + +# +# Kernel hacking +# +# CONFIG_MAGIC_SYSRQ is not set diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile new file mode 100644 index 000000000..0a2abf858 --- /dev/null +++ b/arch/sh/kernel/Makefile @@ -0,0 +1,27 @@ +# +# Makefile for the Linux/SuperH kernel. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +.S.o: + $(CC) -D__ASSEMBLY__ $(AFLAGS) -traditional -c $< -o $*.o + +O_TARGET := kernel.o +O_OBJS := process.o signal.o entry.o traps.o irq.o irq_onchip.o \ + ptrace.o setup.o time.o sys_sh.o test-img.o semaphore.o +OX_OBJS := sh_ksyms.o +MX_OBJS := + +all: kernel.o head.o init_task.o + +entry.o: entry.S + +head.o: head.S + $(CC) -D__ASSEMBLY__ $(AFLAGS) -traditional -c $*.S -o $*.o + +clean: + +include $(TOPDIR)/Rules.make diff --git a/arch/sh/kernel/entry.S b/arch/sh/kernel/entry.S new file mode 100644 index 000000000..7fca58b30 --- /dev/null +++ b/arch/sh/kernel/entry.S @@ -0,0 +1,683 @@ +/* $Id$ + * + * linux/arch/sh/entry.S + * + * Copyright (C) 1999 Niibe Yutaka + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + */ + +#include <linux/sys.h> +#include <linux/linkage.h> + +! NOTE: +! GNU as (as of 2.9.1) changes bf/s into bt/s and bra, when the address +! to be jumped is too far, but it causes illegal slot exception. + +/* + * entry.S contains the system-call and fault low-level handling routines. + * This also contains the timer-interrupt handler, as well as all interrupts + * and faults that can result in a task-switch. + * + * NOTE: This code handles signal-recognition, which happens every time + * after a timer-interrupt and after each system call. + * + * Stack layout in 'ret_from_syscall': + * ptrace needs to have all regs on the stack. + * if the order here is changed, it needs to be + * updated in process.c:copy_thread, signal.c:do_signal, + * ptrace.c and ptrace.h + * + * syscall # + * r0 + * ... + * r15 + * gbr + * mach + * macl + * pr + * ssr + * spc + * + */ + +/* + * these are offsets into the task-struct. + */ +state = 0 +flags = 4 +sigpending = 8 +addr_limit = 12 +need_resched = 20 + +PF_TRACESYS = 0x20 + +ENOSYS = 38 + +TRA = 0xffffffd0 +EXPEVT = 0xffffffd4 +INTEVT = 0xffffffd8 + +/* Offsets to the stack */ +SYSCALL_NR = 0 +R0 = 4 +R15 = 64 + +#define k0 r0 +#define k1 r1 +#define k2 r2 +#define k3 r3 + +#define kernel_sp r4 /* r4_bank1 */ +#define ksp r4_bank /* r4_bank1 */ +#define k_ex_code r2_bank /* r2_bank1 */ + +/* Kernel mode register usage: + k0 scratch + k1 scratch + k2 scratch (Exception code) + k3 scratch (Return address) + k4 Stack base = current+8192 + k5 reserved + k6 reserved + k7 reserved +*/ + +! +! TLB Miss / Initial Page write exception handling +! _and_ +! TLB hits, but the access violate the protection. +! It can be valid access, such as stack grow and/or C-O-W. +! +! +! Find the pmd/pte entry and loadtlb +! If it's not found, cause address error (SEGV) +! +! Although this could be written in assembly language (and it'd be faster), +! this first version depends *much* on C implementation. +! +MMU_TEA = 0xfffffffc ! TLB Exception Address Register + +#define DO_FAULT(write) \ + mov #MMU_TEA,r0; \ + mov.l @r0,r6; \ + /* STI */ \ + mov.l 3f,r1; \ + stc sr,r0; \ + and r1,r0; \ + ldc r0,sr; \ + /* */ \ + mov r15,r4; \ + mov.l 2f,r0; \ + jmp @r0; \ + mov #write,r5; + + .balign 4 +tlb_protection_violation_load: +tlb_miss_load: + mov #-1,r0 + mov.l r0,@r15 ! syscall nr = -1 + DO_FAULT(0) + + .balign 4 +tlb_protection_violation_store: +tlb_miss_store: +initial_page_write: + mov #-1,r0 + mov.l r0,@r15 ! syscall nr = -1 + DO_FAULT(1) + + .balign 4 +2: .long SYMBOL_NAME(do_page_fault) +3: .long 0xefffffff ! BL=0 + + + .balign 4 +error: mov #-1,r0 + ! STI + mov.l 2f,r1 + stc sr,r0 + and r1,r0 + ldc r0,sr + ! + mov.l r0,@r15 ! syscall nr = -1 + mov.l 1f,r1 + jmp @r1 + nop + .balign 4 +1: .long SYMBOL_NAME(do_exception_error) + +reschedule: + mova SYMBOL_NAME(ret_from_syscall),r0 + mov.l 1f,r1 + jmp @r1 + lds r0,pr + .balign 4 +1: .long SYMBOL_NAME(schedule) + +badsys: mov #-ENOSYS,r0 + bra SYMBOL_NAME(ret_from_syscall) + mov.l r0,@(R0,r15) + +signal_return: + ! We can reach here from an interrupt handler, + ! so, we need to unblock interrupt. + mov.l 1f,r1 + stc sr,r0 + and r1,r0 + ldc r0,sr + ! + mov r15,r4 + mov #0,r5 + mov.l 2f,r1 + mova restore_all,r0 + jmp @r1 + lds r0,pr + .balign 4 +1: .long 0xefffffff ! BL=0 +2: .long SYMBOL_NAME(do_signal) + +! +! +! +ENTRY(ret_from_fork) + bra SYMBOL_NAME(ret_from_syscall) + add #4,r15 ! pop down bogus r0 + +! +! The immediate value of "trapa" indicates the number of arguments +! placed on the stack. +! +system_call: + mov #TRA,r2 + mov.l @r2,r8 + ! STI + mov.l 2f,r1 + stc sr,r2 + and r1,r2 + ldc r2,sr + ! + mov.l __n_sys,r1 + cmp/ge r1,r0 + bt badsys + ! + stc ksp,r1 ! + mov.l __tsk_flags,r0 ! + add r0,r1 ! + mov.l @r1,r0 ! Is it trace? + tst #PF_TRACESYS,r0 + bt 6f + ! Trace system call + mov #-ENOSYS,r1 + mov.l r1,@(R0,r15) + mov.l 3f,r1 + jsr @r1 + nop + mova 4f,r0 + bra 7f + lds r0,pr + ! +6: mova 1f,r0 + lds r0,pr + ! Build the stack frame if TRA > 0 +7: cmp/pl r8 + bf 9f + shll2 r8 ! x4 + mov #R15,r0 + mov.l @(r0,r15),r0 ! get original stack +8: add #-4,r8 + mov.l @(r0,r8),r1 + mov.l r1,@-r15 + cmp/pl r8 + bt 8b + ! +9: mov.l @(SYSCALL_NR,r15),r0 + shll2 r0 ! x4 + mov.l __sct,r1 + add r1,r0 + mov.l @r0,r1 + jmp @r1 + nop + .balign 4 +4: mov.l r0,@(R0,r15) ! save the return value + mov.l 3f,r1 + mova SYMBOL_NAME(ret_from_syscall),r0 + jmp @r1 + lds r0,pr + .balign 4 +3: .long SYMBOL_NAME(syscall_trace) +2: .long 0xefffffff ! BL=0 +1: mov.l r0,@(R0,r15) ! save the return value + /* fall through */ + +ENTRY(ret_from_syscall) +ENTRY(ret_from_irq) + mov.l __bh_mask,r0 + mov.l @r0,r1 + mov.l __bh_active,r0 + mov.l @r0,r2 + tst r2,r1 + bt ret_with_reschedule +handle_bottom_half: + mov.l __dbh,r0 + jsr @r0 + nop +ret_with_reschedule: + stc ksp,r1 + mov.l __minus8192,r0 + add r0,r1 + mov.l @(need_resched,r1),r0 + tst #0xff,r0 + bf reschedule + mov.l @(sigpending,r1),r0 + tst #0xff,r0 + bf signal_return + ! + .balign 4 +restore_all: + add #4,r15 ! skip syscall number + mov.l @r15+,r0 + mov.l @r15+,r1 + mov.l @r15+,r2 + mov.l @r15+,r3 + mov.l @r15+,r4 + mov.l @r15+,r5 + mov.l @r15+,r6 + mov.l @r15+,r7 + stc sr,r14 + mov.l __blrb_flags,r9 ! BL =1, RB=1 + or r9,r14 + ldc r14,sr ! here, change the register bank + mov.l @r15+,r8 + mov.l @r15+,r9 + mov.l @r15+,r10 + mov.l @r15+,r11 + mov.l @r15+,r12 + mov.l @r15+,r13 + mov.l @r15+,r14 + mov.l @r15+,k0 + ldc.l @r15+,gbr + lds.l @r15+,mach + lds.l @r15+,macl + lds.l @r15+,pr + ldc.l @r15+,ssr + ldc.l @r15+,spc + mov k0,r15 + rte + nop + + .balign 4 +__n_sys: .long NR_syscalls +__sct: .long SYMBOL_NAME(sys_call_table) +__bh_mask: .long SYMBOL_NAME(bh_mask) +__bh_active: .long SYMBOL_NAME(bh_active) +__dbh: .long SYMBOL_NAME(do_bottom_half) +__blrb_flags: .long 0x30000000 +__minus8192: .long -8192 ! offset from stackbase to tsk +__tsk_flags: .long flags-8192 ! offset from stackbase to tsk->flags + + +! Exception Vector Base +! +! Should be aligned page boundary. +! + .balign 4096,0,4096 +ENTRY(vbr_base) + .long 0 +! + .balign 256,0,256 +general_exception: + mov #EXPEVT,k2 + mov.l 2f,k3 + bra handle_exception + mov.l @k2,k2 + .balign 4 +2: .long SYMBOL_NAME(ret_from_syscall) +! +! + .balign 1024,0,1024 +tlb_miss: + mov #EXPEVT,k2 + mov.l 3f,k3 + bra handle_exception + mov.l @k2,k2 +! + .balign 512,0,512 +interrupt: + mov #INTEVT,k2 + mov.l 4f,k3 + bra handle_exception + mov.l @k2,k2 + + .balign 4 +3: .long SYMBOL_NAME(ret_from_syscall) +4: .long SYMBOL_NAME(ret_from_irq) + +! +! +handle_exception: + ! Using k0, k1 for scratch registers (r0_bank1, and r1_bank1), + ! save all registers onto stack. + ! + mov.l 2f,k1 + stc ssr,k0 ! from kernel space? + shll k0 ! Check MD bit (bit30) + shll k0 + bt/s 1f ! it's from kernel to kernel transition + mov r15,k0 ! save original stack to k0 anyway + mov kernel_sp,r15 ! change to kernel stack +1: stc.l spc,@-r15 ! save control registers + stc.l ssr,@-r15 + sts.l pr,@-r15 + ! + lds k3,pr ! Set the return address to pr + ! + sts.l macl,@-r15 + sts.l mach,@-r15 + stc.l gbr,@-r15 + mov.l k0,@-r15 ! save orignal stack, and general registers + mov.l r14,@-r15 + ! + stc sr,r14 ! back to normal register bank, and + and k1,r14 ! .. + ldc r14,sr ! ...changed here. + ! + mov.l r13,@-r15 + mov.l r12,@-r15 + mov.l r11,@-r15 + mov.l r10,@-r15 + mov.l r9,@-r15 + mov.l r8,@-r15 + mov.l r7,@-r15 + mov.l r6,@-r15 + mov.l r5,@-r15 + mov.l r4,@-r15 + mov.l r3,@-r15 + mov.l r2,@-r15 + mov.l r1,@-r15 + mov.l r0,@-r15 + mov.l r0,@-r15 ! push r0 again (for syscall number) + ! Then, dispatch to the handler, according to the excepiton code. + stc k_ex_code,r1 + shlr2 r1 + shlr r1 + mov.l 1f,r0 + add r1,r0 + mov.l @r0,r0 + jmp @r0 + mov.l @r15,r0 ! recovering r0.. + .balign 4 +1: .long SYMBOL_NAME(exception_handling_table) +2: .long 0xdfffffff ! RB=0, BL=1 + +.data +ENTRY(exception_handling_table) + .long 0 + .long 0 + .long tlb_miss_load + .long tlb_miss_store + .long initial_page_write + .long tlb_protection_violation_load + .long tlb_protection_violation_store + .long error ! address_error_load (filled by trap_init) + .long error ! address_error_store (filled by trap_init) + .long 0 + .long 0 + .long system_call ! Unconditional Trap + .long error ! reserved_instruction (filled by trap_init) + .long error ! illegal_slot_instruction (filled by trap_init) +ENTRY(nmi_slot) + .long error ! Not implemented yet +ENTRY(user_break_point_trap) + .long error ! Not implemented yet +ENTRY(interrupt_table) + ! external hardware + .long SYMBOL_NAME(do_IRQ) ! 0000 + .long SYMBOL_NAME(do_IRQ) ! 0001 + .long SYMBOL_NAME(do_IRQ) ! 0010 + .long SYMBOL_NAME(do_IRQ) ! 0011 + .long SYMBOL_NAME(do_IRQ) ! 0100 + .long SYMBOL_NAME(do_IRQ) ! 0101 + .long SYMBOL_NAME(do_IRQ) ! 0110 + .long SYMBOL_NAME(do_IRQ) ! 0111 + .long SYMBOL_NAME(do_IRQ) ! 1000 + .long SYMBOL_NAME(do_IRQ) ! 1001 + .long SYMBOL_NAME(do_IRQ) ! 1010 + .long SYMBOL_NAME(do_IRQ) ! 1011 + .long SYMBOL_NAME(do_IRQ) ! 1100 + .long SYMBOL_NAME(do_IRQ) ! 1101 + .long SYMBOL_NAME(do_IRQ) ! 1110 + .long 0 + ! Internal hardware + .long SYMBOL_NAME(do_IRQ) ! TMU0 tuni0 + .long SYMBOL_NAME(do_IRQ) ! TMU1 tuni1 + .long SYMBOL_NAME(do_IRQ) ! TMU2 tuni2 + .long SYMBOL_NAME(do_IRQ) ! ticpi2 + .long SYMBOL_NAME(do_IRQ) ! RTC ati + .long SYMBOL_NAME(do_IRQ) ! pri + .long SYMBOL_NAME(do_IRQ) ! cui + .long SYMBOL_NAME(do_IRQ) ! SCI eri + .long SYMBOL_NAME(do_IRQ) ! rxi + .long SYMBOL_NAME(do_IRQ) ! txi + .long SYMBOL_NAME(do_IRQ) ! tei + .long SYMBOL_NAME(do_IRQ) ! WDT iti + .long SYMBOL_NAME(do_IRQ) ! REF rcmi + .long SYMBOL_NAME(do_IRQ) ! rovi + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + .long SYMBOL_NAME(do_IRQ) + +ENTRY(sys_call_table) + .long SYMBOL_NAME(sys_ni_syscall) /* 0 - old "setup()" system call*/ + .long SYMBOL_NAME(sys_exit) + .long SYMBOL_NAME(sys_fork) + .long SYMBOL_NAME(sys_read) + .long SYMBOL_NAME(sys_write) + .long SYMBOL_NAME(sys_open) /* 5 */ + .long SYMBOL_NAME(sys_close) + .long SYMBOL_NAME(sys_waitpid) + .long SYMBOL_NAME(sys_creat) + .long SYMBOL_NAME(sys_link) + .long SYMBOL_NAME(sys_unlink) /* 10 */ + .long SYMBOL_NAME(sys_execve) + .long SYMBOL_NAME(sys_chdir) + .long SYMBOL_NAME(sys_time) + .long SYMBOL_NAME(sys_mknod) + .long SYMBOL_NAME(sys_chmod) /* 15 */ + .long SYMBOL_NAME(sys_lchown) + .long SYMBOL_NAME(sys_ni_syscall) /* old break syscall holder */ + .long SYMBOL_NAME(sys_stat) + .long SYMBOL_NAME(sys_lseek) + .long SYMBOL_NAME(sys_getpid) /* 20 */ + .long SYMBOL_NAME(sys_mount) + .long SYMBOL_NAME(sys_oldumount) + .long SYMBOL_NAME(sys_setuid) + .long SYMBOL_NAME(sys_getuid) + .long SYMBOL_NAME(sys_stime) /* 25 */ + .long SYMBOL_NAME(sys_ptrace) + .long SYMBOL_NAME(sys_alarm) + .long SYMBOL_NAME(sys_fstat) + .long SYMBOL_NAME(sys_pause) + .long SYMBOL_NAME(sys_utime) /* 30 */ + .long SYMBOL_NAME(sys_ni_syscall) /* old stty syscall holder */ + .long SYMBOL_NAME(sys_ni_syscall) /* old gtty syscall holder */ + .long SYMBOL_NAME(sys_access) + .long SYMBOL_NAME(sys_nice) + .long SYMBOL_NAME(sys_ni_syscall) /* 35 */ /* old ftime syscall holder */ + .long SYMBOL_NAME(sys_sync) + .long SYMBOL_NAME(sys_kill) + .long SYMBOL_NAME(sys_rename) + .long SYMBOL_NAME(sys_mkdir) + .long SYMBOL_NAME(sys_rmdir) /* 40 */ + .long SYMBOL_NAME(sys_dup) + .long SYMBOL_NAME(sys_pipe) + .long SYMBOL_NAME(sys_times) + .long SYMBOL_NAME(sys_ni_syscall) /* old prof syscall holder */ + .long SYMBOL_NAME(sys_brk) /* 45 */ + .long SYMBOL_NAME(sys_setgid) + .long SYMBOL_NAME(sys_getgid) + .long SYMBOL_NAME(sys_signal) + .long SYMBOL_NAME(sys_geteuid) + .long SYMBOL_NAME(sys_getegid) /* 50 */ + .long SYMBOL_NAME(sys_acct) + .long SYMBOL_NAME(sys_umount) /* recycled never used phys() */ + .long SYMBOL_NAME(sys_ni_syscall) /* old lock syscall holder */ + .long SYMBOL_NAME(sys_ioctl) + .long SYMBOL_NAME(sys_fcntl) /* 55 */ + .long SYMBOL_NAME(sys_ni_syscall) /* old mpx syscall holder */ + .long SYMBOL_NAME(sys_setpgid) + .long SYMBOL_NAME(sys_ni_syscall) /* old ulimit syscall holder */ + .long SYMBOL_NAME(sys_ni_syscall) /* sys_olduname */ + .long SYMBOL_NAME(sys_umask) /* 60 */ + .long SYMBOL_NAME(sys_chroot) + .long SYMBOL_NAME(sys_ustat) + .long SYMBOL_NAME(sys_dup2) + .long SYMBOL_NAME(sys_getppid) + .long SYMBOL_NAME(sys_getpgrp) /* 65 */ + .long SYMBOL_NAME(sys_setsid) + .long SYMBOL_NAME(sys_sigaction) + .long SYMBOL_NAME(sys_sgetmask) + .long SYMBOL_NAME(sys_ssetmask) + .long SYMBOL_NAME(sys_setreuid) /* 70 */ + .long SYMBOL_NAME(sys_setregid) + .long SYMBOL_NAME(sys_sigsuspend) + .long SYMBOL_NAME(sys_sigpending) + .long SYMBOL_NAME(sys_sethostname) + .long SYMBOL_NAME(sys_setrlimit) /* 75 */ + .long SYMBOL_NAME(sys_getrlimit) + .long SYMBOL_NAME(sys_getrusage) + .long SYMBOL_NAME(sys_gettimeofday) + .long SYMBOL_NAME(sys_settimeofday) + .long SYMBOL_NAME(sys_getgroups) /* 80 */ + .long SYMBOL_NAME(sys_setgroups) + .long SYMBOL_NAME(sys_ni_syscall) /* old_select */ + .long SYMBOL_NAME(sys_symlink) + .long SYMBOL_NAME(sys_lstat) + .long SYMBOL_NAME(sys_readlink) /* 85 */ + .long SYMBOL_NAME(sys_uselib) + .long SYMBOL_NAME(sys_swapon) + .long SYMBOL_NAME(sys_reboot) + .long SYMBOL_NAME(old_readdir) + .long SYMBOL_NAME(sys_ni_syscall) /* old_mmap */ /* 90 */ + .long SYMBOL_NAME(sys_munmap) + .long SYMBOL_NAME(sys_truncate) + .long SYMBOL_NAME(sys_ftruncate) + .long SYMBOL_NAME(sys_fchmod) + .long SYMBOL_NAME(sys_fchown) /* 95 */ + .long SYMBOL_NAME(sys_getpriority) + .long SYMBOL_NAME(sys_setpriority) + .long SYMBOL_NAME(sys_ni_syscall) /* old profil syscall holder */ + .long SYMBOL_NAME(sys_statfs) + .long SYMBOL_NAME(sys_fstatfs) /* 100 */ + .long SYMBOL_NAME(sys_ni_syscall) /* ioperm */ + .long SYMBOL_NAME(sys_socketcall) + .long SYMBOL_NAME(sys_syslog) + .long SYMBOL_NAME(sys_setitimer) + .long SYMBOL_NAME(sys_getitimer) /* 105 */ + .long SYMBOL_NAME(sys_newstat) + .long SYMBOL_NAME(sys_newlstat) + .long SYMBOL_NAME(sys_newfstat) + .long SYMBOL_NAME(sys_uname) + .long SYMBOL_NAME(sys_ni_syscall) /* 110 */ /* iopl */ + .long SYMBOL_NAME(sys_vhangup) + .long SYMBOL_NAME(sys_ni_syscall) /* idle */ + .long SYMBOL_NAME(sys_ni_syscall) /* vm86old */ + .long SYMBOL_NAME(sys_wait4) + .long SYMBOL_NAME(sys_swapoff) /* 115 */ + .long SYMBOL_NAME(sys_sysinfo) + .long SYMBOL_NAME(sys_ipc) + .long SYMBOL_NAME(sys_fsync) + .long SYMBOL_NAME(sys_sigreturn) + .long SYMBOL_NAME(sys_clone) /* 120 */ + .long SYMBOL_NAME(sys_setdomainname) + .long SYMBOL_NAME(sys_newuname) + .long SYMBOL_NAME(sys_ni_syscall) /* sys_modify_ldt */ + .long SYMBOL_NAME(sys_adjtimex) + .long SYMBOL_NAME(sys_mprotect) /* 125 */ + .long SYMBOL_NAME(sys_sigprocmask) + .long SYMBOL_NAME(sys_create_module) + .long SYMBOL_NAME(sys_init_module) + .long SYMBOL_NAME(sys_delete_module) + .long SYMBOL_NAME(sys_get_kernel_syms) /* 130 */ + .long SYMBOL_NAME(sys_quotactl) + .long SYMBOL_NAME(sys_getpgid) + .long SYMBOL_NAME(sys_fchdir) + .long SYMBOL_NAME(sys_bdflush) + .long SYMBOL_NAME(sys_sysfs) /* 135 */ + .long SYMBOL_NAME(sys_personality) + .long SYMBOL_NAME(sys_ni_syscall) /* for afs_syscall */ + .long SYMBOL_NAME(sys_setfsuid) + .long SYMBOL_NAME(sys_setfsgid) + .long SYMBOL_NAME(sys_llseek) /* 140 */ + .long SYMBOL_NAME(sys_getdents) + .long SYMBOL_NAME(sys_select) + .long SYMBOL_NAME(sys_flock) + .long SYMBOL_NAME(sys_msync) + .long SYMBOL_NAME(sys_readv) /* 145 */ + .long SYMBOL_NAME(sys_writev) + .long SYMBOL_NAME(sys_getsid) + .long SYMBOL_NAME(sys_fdatasync) + .long SYMBOL_NAME(sys_sysctl) + .long SYMBOL_NAME(sys_mlock) /* 150 */ + .long SYMBOL_NAME(sys_munlock) + .long SYMBOL_NAME(sys_mlockall) + .long SYMBOL_NAME(sys_munlockall) + .long SYMBOL_NAME(sys_sched_setparam) + .long SYMBOL_NAME(sys_sched_getparam) /* 155 */ + .long SYMBOL_NAME(sys_sched_setscheduler) + .long SYMBOL_NAME(sys_sched_getscheduler) + .long SYMBOL_NAME(sys_sched_yield) + .long SYMBOL_NAME(sys_sched_get_priority_max) + .long SYMBOL_NAME(sys_sched_get_priority_min) /* 160 */ + .long SYMBOL_NAME(sys_sched_rr_get_interval) + .long SYMBOL_NAME(sys_nanosleep) + .long SYMBOL_NAME(sys_mremap) + .long SYMBOL_NAME(sys_setresuid) + .long SYMBOL_NAME(sys_getresuid) /* 165 */ + .long SYMBOL_NAME(sys_ni_syscall) /* vm86 */ + .long SYMBOL_NAME(sys_query_module) + .long SYMBOL_NAME(sys_poll) + .long SYMBOL_NAME(sys_nfsservctl) + .long SYMBOL_NAME(sys_setresgid) /* 170 */ + .long SYMBOL_NAME(sys_getresgid) + .long SYMBOL_NAME(sys_prctl) + .long SYMBOL_NAME(sys_rt_sigreturn) + .long SYMBOL_NAME(sys_rt_sigaction) + .long SYMBOL_NAME(sys_rt_sigprocmask) /* 175 */ + .long SYMBOL_NAME(sys_rt_sigpending) + .long SYMBOL_NAME(sys_rt_sigtimedwait) + .long SYMBOL_NAME(sys_rt_sigqueueinfo) + .long SYMBOL_NAME(sys_rt_sigsuspend) + .long SYMBOL_NAME(sys_pread) /* 180 */ + .long SYMBOL_NAME(sys_pwrite) + .long SYMBOL_NAME(sys_chown) + .long SYMBOL_NAME(sys_getcwd) + .long SYMBOL_NAME(sys_capget) + .long SYMBOL_NAME(sys_capset) /* 185 */ + .long SYMBOL_NAME(sys_sigaltstack) + .long SYMBOL_NAME(sys_sendfile) + .long SYMBOL_NAME(sys_ni_syscall) /* streams1 */ + .long SYMBOL_NAME(sys_ni_syscall) /* streams2 */ + .long SYMBOL_NAME(sys_vfork) /* 190 */ + + /* + * NOTE!! This doesn't have to be exact - we just have + * to make sure we have _enough_ of the "sys_ni_syscall" + * entries. Don't panic if you notice that this hasn't + * been shrunk every time we add a new system call. + */ + .rept NR_syscalls-190 + .long SYMBOL_NAME(sys_ni_syscall) + .endr + +/* End of entry.S */ diff --git a/arch/sh/kernel/head.S b/arch/sh/kernel/head.S new file mode 100644 index 000000000..ed466ba38 --- /dev/null +++ b/arch/sh/kernel/head.S @@ -0,0 +1,69 @@ +/* $Id$ + * + * arch/sh/kernel/head.S + * + * Copyright (C) 1999 Niibe Yutaka + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Head.S contains the SH exception handlers and startup code. + */ +#include <linux/config.h> +#include <linux/threads.h> +#include <linux/linkage.h> +#include <asm/page.h> +#include <asm/pgtable.h> + +#ifdef CONFIG_CPU_SH3 +/* Following values are assumed to be as small as immediate. */ +#define CCR 0xffffffec /* Address of Cache Control Register */ +#define CACHE_INIT 0x00000009 /* 8k-byte cache, flush, enable */ +#elif CONFIG_CPU_SH4 +/* Should fill here. */ +#endif + +ENTRY(_stext) + ! Switch to register bank 0 + stc sr,r1 ! + mov.l 1f,r0 ! RB=0, BL=1 + and r1,r0 + ldc r0,sr + ! Enable cache +#ifdef CONFIG_CPU_SH3 + mov #CCR,r1 + mov.l @r1,r0 + cmp/eq #1,r0 ! If it's enabled already, don't flush it + bt/s 8f + mov #CACHE_INIT,r0 + mov.l r0,@r1 +#elif CONFIG_CPU_SH4 + ! Should fill here. +#endif +8: + ! + mov.l 2f,r0 + mov r0,r15 ! Set initial r15 (stack pointer) + ldc r0,r4_bank ! and stack base + ! Clear BSS area + mov.l 3f,r1 + mov.l 4f,r2 + mov #0,r0 +9: mov.l r0,@r1 + cmp/hs r2,r1 + bf/s 9b + add #4,r1 + ! Start kernel + mov.l 5f,r0 + jmp @r0 + nop + + .balign 4 +1: .long 0xdfffffff ! RB=0, BL=1 +2: .long SYMBOL_NAME(stack) +3: .long SYMBOL_NAME(__bss_start) +4: .long SYMBOL_NAME(_end) +5: .long SYMBOL_NAME(start_kernel) + +.data diff --git a/arch/sh/kernel/init_task.c b/arch/sh/kernel/init_task.c new file mode 100644 index 000000000..aacd8f304 --- /dev/null +++ b/arch/sh/kernel/init_task.c @@ -0,0 +1,23 @@ +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/init.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> + +static struct vm_area_struct init_mmap = INIT_MMAP; +static struct fs_struct init_fs = INIT_FS; +static struct files_struct init_files = INIT_FILES; +static struct signal_struct init_signals = INIT_SIGNALS; +struct mm_struct init_mm = INIT_MM(init_mm); + +/* + * Initial task structure. + * + * We need to make sure that this is 8192-byte aligned due to the + * way process stacks are handled. This is done by having a special + * "init_task" linker map entry.. + */ +union task_union init_task_union + __attribute__((__section__(".data.init_task"))) = + { INIT_TASK(init_task_union.task) }; diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c new file mode 100644 index 000000000..f75af5003 --- /dev/null +++ b/arch/sh/kernel/irq.c @@ -0,0 +1,485 @@ +/* + * linux/arch/sh/kernel/irq.c + * + * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar + * + * + * SuperH version: Copyright (C) 1999 Niibe Yutaka + */ + +/* + * IRQs are in fact implemented a bit like signal handlers for the kernel. + * Naturally it's not a 1:1 relation, but there are similarities. + */ + +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/kernel_stat.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/malloc.h> +#include <linux/random.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/init.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/bitops.h> +#include <asm/smp.h> +#include <asm/pgtable.h> +#include <asm/delay.h> +#include <asm/irq.h> +#include <linux/irq.h> + + +unsigned int local_bh_count[NR_CPUS]; +unsigned int local_irq_count[NR_CPUS]; + +/* + * Micro-access to controllers is serialized over the whole + * system. We never hold this lock when we call the actual + * IRQ handler. + */ +spinlock_t irq_controller_lock = SPIN_LOCK_UNLOCKED; +/* + * Controller mappings for all interrupt sources: + */ +irq_desc_t irq_desc[NR_IRQS] = { [0 ... NR_IRQS-1] = { 0, &no_irq_type, }}; + +/* + * Special irq handlers. + */ + +void no_action(int cpl, void *dev_id, struct pt_regs *regs) { } + +/* + * Generic, controller-independent functions: + */ + +int get_irq_list(char *buf) +{ + int i, j; + struct irqaction * action; + char *p = buf; + + p += sprintf(p, " "); + for (j=0; j<smp_num_cpus; j++) + p += sprintf(p, "CPU%d ",j); + *p++ = '\n'; + + for (i = 0 ; i < NR_IRQS ; i++) { + action = irq_desc[i].action; + if (!action) + continue; + p += sprintf(p, "%3d: ",i); + p += sprintf(p, "%10u ", kstat_irqs(i)); + p += sprintf(p, " %14s", irq_desc[i].handler->typename); + p += sprintf(p, " %s", action->name); + + for (action=action->next; action; action = action->next) { + p += sprintf(p, ", %s", action->name); + } + *p++ = '\n'; + } + return p - buf; +} + +/* + * This should really return information about whether + * we should do bottom half handling etc. Right now we + * end up _always_ checking the bottom half, which is a + * waste of time and is not what some drivers would + * prefer. + */ +int handle_IRQ_event(unsigned int irq, struct pt_regs * regs, struct irqaction * action) +{ + int status; + int cpu = smp_processor_id(); + + irq_enter(cpu, irq); + + status = 1; /* Force the "do bottom halves" bit */ + + if (!(action->flags & SA_INTERRUPT)) + __sti(); + + do { + status |= action->flags; + action->handler(irq, action->dev_id, regs); + action = action->next; + } while (action); + if (status & SA_SAMPLE_RANDOM) + add_interrupt_randomness(irq); + __cli(); + + irq_exit(cpu, irq); + + return status; +} + +/* + * Generic enable/disable code: this just calls + * down into the PIC-specific version for the actual + * hardware disable after having gotten the irq + * controller lock. + */ +void disable_irq_nosync(unsigned int irq) +{ + unsigned long flags; + + spin_lock_irqsave(&irq_controller_lock, flags); + if (!irq_desc[irq].depth++) { + irq_desc[irq].status |= IRQ_DISABLED; + irq_desc[irq].handler->disable(irq); + } + spin_unlock_irqrestore(&irq_controller_lock, flags); +} + +/* + * Synchronous version of the above, making sure the IRQ is + * no longer running on any other IRQ.. + */ +void disable_irq(unsigned int irq) +{ + disable_irq_nosync(irq); + + if (!local_irq_count[smp_processor_id()]) { + do { + barrier(); + } while (irq_desc[irq].status & IRQ_INPROGRESS); + } +} + +void enable_irq(unsigned int irq) +{ + unsigned long flags; + + spin_lock_irqsave(&irq_controller_lock, flags); + switch (irq_desc[irq].depth) { + case 1: { + unsigned int status = irq_desc[irq].status & ~IRQ_DISABLED; + irq_desc[irq].status = status; + if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) { + irq_desc[irq].status = status | IRQ_REPLAY; + hw_resend_irq(irq_desc[irq].handler,irq); + } + irq_desc[irq].handler->enable(irq); + /* fall-through */ + } + default: + irq_desc[irq].depth--; + break; + case 0: + printk("enable_irq() unbalanced from %p\n", + __builtin_return_address(0)); + } + spin_unlock_irqrestore(&irq_controller_lock, flags); +} + +/* + * do_IRQ handles all normal device IRQ's. + */ +asmlinkage int do_IRQ(unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + /* + * We ack quickly, we don't want the irq controller + * thinking we're snobs just because some other CPU has + * disabled global interrupts (we have already done the + * INT_ACK cycles, it's too late to try to pretend to the + * controller that we aren't taking the interrupt). + * + * 0 return value means that this irq is already being + * handled by some other CPU. (or is disabled) + */ + int irq; + int cpu = smp_processor_id(); + irq_desc_t *desc; + struct irqaction * action; + unsigned int status; + + /* Get IRQ number */ + asm volatile("stc r2_bank,%0\n\t" + "shlr2 %0\n\t" + "shlr2 %0\n\t" + "shlr %0\n\t" + "add #-16,%0\n\t" + :"=z" (irq)); + + kstat.irqs[cpu][irq]++; + desc = irq_desc + irq; + spin_lock(&irq_controller_lock); + irq_desc[irq].handler->ack(irq); + /* + REPLAY is when Linux resends an IRQ that was dropped earlier + WAITING is used by probe to mark irqs that are being tested + */ + status = desc->status & ~(IRQ_REPLAY | IRQ_WAITING); + status |= IRQ_PENDING; /* we _want_ to handle it */ + + /* + * If the IRQ is disabled for whatever reason, we cannot + * use the action we have. + */ + action = NULL; + if (!(status & (IRQ_DISABLED | IRQ_INPROGRESS))) { + action = desc->action; + status &= ~IRQ_PENDING; /* we commit to handling */ + status |= IRQ_INPROGRESS; /* we are handling it */ + } + desc->status = status; + spin_unlock(&irq_controller_lock); + + /* + * If there is no IRQ handler or it was disabled, exit early. + Since we set PENDING, if another processor is handling + a different instance of this same irq, the other processor + will take care of it. + */ + if (!action) + return 1; + + /* + * Edge triggered interrupts need to remember + * pending events. + * This applies to any hw interrupts that allow a second + * instance of the same irq to arrive while we are in do_IRQ + * or in the handler. But the code here only handles the _second_ + * instance of the irq, not the third or fourth. So it is mostly + * useful for irq hardware that does not mask cleanly in an + * SMP environment. + */ + for (;;) { + handle_IRQ_event(irq, ®s, action); + spin_lock(&irq_controller_lock); + + if (!(desc->status & IRQ_PENDING)) + break; + desc->status &= ~IRQ_PENDING; + spin_unlock(&irq_controller_lock); + } + desc->status &= ~IRQ_INPROGRESS; + if (!(desc->status & IRQ_DISABLED)){ + irq_desc[irq].handler->end(irq); + } + spin_unlock(&irq_controller_lock); + + /* + * This should be conditional: we should really get + * a return code from the irq handler to tell us + * whether the handler wants us to do software bottom + * half handling or not.. + */ + if (1) { + if (bh_active & bh_mask) + do_bottom_half(); + } + return 1; +} + +int request_irq(unsigned int irq, + void (*handler)(int, void *, struct pt_regs *), + unsigned long irqflags, + const char * devname, + void *dev_id) +{ + int retval; + struct irqaction * action; + + if (irq >= NR_IRQS) + return -EINVAL; + if (!handler) + return -EINVAL; + + action = (struct irqaction *) + kmalloc(sizeof(struct irqaction), GFP_KERNEL); + if (!action) + return -ENOMEM; + + action->handler = handler; + action->flags = irqflags; + action->mask = 0; + action->name = devname; + action->next = NULL; + action->dev_id = dev_id; + + retval = setup_irq(irq, action); + if (retval) + kfree(action); + return retval; +} + +void free_irq(unsigned int irq, void *dev_id) +{ + struct irqaction **p; + unsigned long flags; + + if (irq >= NR_IRQS) + return; + + spin_lock_irqsave(&irq_controller_lock,flags); + p = &irq_desc[irq].action; + for (;;) { + struct irqaction * action = *p; + if (action) { + struct irqaction **pp = p; + p = &action->next; + if (action->dev_id != dev_id) + continue; + + /* Found it - now remove it from the list of entries */ + *pp = action->next; + if (irq_desc[irq].action) + break; + irq_desc[irq].status |= IRQ_DISABLED; + irq_desc[irq].handler->shutdown(irq); + break; + } + printk("Trying to free free IRQ%d\n",irq); + break; + } + spin_unlock_irqrestore(&irq_controller_lock,flags); +} + +/* + * IRQ autodetection code.. + * + * This depends on the fact that any interrupt that + * comes in on to an unassigned handler will get stuck + * with "IRQ_WAITING" cleared and the interrupt + * disabled. + */ +unsigned long probe_irq_on(void) +{ + unsigned int i; + unsigned long delay; + + /* + * first, enable any unassigned irqs + */ + spin_lock_irq(&irq_controller_lock); + for (i = NR_IRQS-1; i > 0; i--) { + if (!irq_desc[i].action) { + irq_desc[i].status |= IRQ_AUTODETECT | IRQ_WAITING; + if(irq_desc[i].handler->startup(i)) + irq_desc[i].status |= IRQ_PENDING; + } + } + spin_unlock_irq(&irq_controller_lock); + + /* + * Wait for spurious interrupts to trigger + */ + for (delay = jiffies + HZ/10; time_after(delay, jiffies); ) + /* about 100ms delay */ synchronize_irq(); + + /* + * Now filter out any obviously spurious interrupts + */ + spin_lock_irq(&irq_controller_lock); + for (i=0; i<NR_IRQS; i++) { + unsigned int status = irq_desc[i].status; + + if (!(status & IRQ_AUTODETECT)) + continue; + + /* It triggered already - consider it spurious. */ + if (!(status & IRQ_WAITING)) { + irq_desc[i].status = status & ~IRQ_AUTODETECT; + irq_desc[i].handler->shutdown(i); + } + } + spin_unlock_irq(&irq_controller_lock); + + return 0x12345678; +} + +int probe_irq_off(unsigned long unused) +{ + int i, irq_found, nr_irqs; + + if (unused != 0x12345678) + printk("Bad IRQ probe from %lx\n", (&unused)[-1]); + + nr_irqs = 0; + irq_found = 0; + spin_lock_irq(&irq_controller_lock); + for (i=0; i<NR_IRQS; i++) { + unsigned int status = irq_desc[i].status; + + if (!(status & IRQ_AUTODETECT)) + continue; + + if (!(status & IRQ_WAITING)) { + if (!nr_irqs) + irq_found = i; + nr_irqs++; + } + irq_desc[i].status = status & ~IRQ_AUTODETECT; + irq_desc[i].handler->shutdown(i); + } + spin_unlock_irq(&irq_controller_lock); + + if (nr_irqs > 1) + irq_found = -irq_found; + return irq_found; +} + +int setup_irq(unsigned int irq, struct irqaction * new) +{ + int shared = 0; + struct irqaction *old, **p; + unsigned long flags; + + /* + * Some drivers like serial.c use request_irq() heavily, + * so we have to be careful not to interfere with a + * running system. + */ + if (new->flags & SA_SAMPLE_RANDOM) { + /* + * This function might sleep, we want to call it first, + * outside of the atomic block. + * Yes, this might clear the entropy pool if the wrong + * driver is attempted to be loaded, without actually + * installing a new handler, but is this really a problem, + * only the sysadmin is able to do this. + */ + rand_initialize_irq(irq); + } + + /* + * The following block of code has to be executed atomically + */ + spin_lock_irqsave(&irq_controller_lock,flags); + p = &irq_desc[irq].action; + if ((old = *p) != NULL) { + /* Can't share interrupts unless both agree to */ + if (!(old->flags & new->flags & SA_SHIRQ)) { + spin_unlock_irqrestore(&irq_controller_lock,flags); + return -EBUSY; + } + + /* add new interrupt at end of irq queue */ + do { + p = &old->next; + old = *p; + } while (old); + shared = 1; + } + + *p = new; + + if (!shared) { + irq_desc[irq].depth = 0; + irq_desc[irq].status &= ~IRQ_DISABLED; + irq_desc[irq].handler->startup(irq); + } + spin_unlock_irqrestore(&irq_controller_lock,flags); + return 0; +} diff --git a/arch/sh/kernel/irq_onchip.c b/arch/sh/kernel/irq_onchip.c new file mode 100644 index 000000000..2eae049e5 --- /dev/null +++ b/arch/sh/kernel/irq_onchip.c @@ -0,0 +1,168 @@ +/* + * linux/arch/sh/kernel/irq_onchip.c + * + * Copyright (C) 1999 Niibe Yutaka + * + * Interrupt handling for on-chip supporting modules (TMU, RTC, etc.). + * + */ + +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/kernel_stat.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/malloc.h> +#include <linux/random.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/init.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/bitops.h> +#include <asm/smp.h> +#include <asm/pgtable.h> +#include <asm/delay.h> + +#include <linux/irq.h> + + +/* + * SH (non-)specific no controller code + */ + +static void enable_none(unsigned int irq) { } +static unsigned int startup_none(unsigned int irq) { return 0; } +static void disable_none(unsigned int irq) { } +static void ack_none(unsigned int irq) +{ +} + +/* startup is the same as "enable", shutdown is same as "disable" */ +#define shutdown_none disable_none +#define end_none enable_none + +struct hw_interrupt_type no_irq_type = { + "none", + startup_none, + shutdown_none, + enable_none, + disable_none, + ack_none, + end_none +}; + +struct ipr_data { + int offset; + int priority; +}; +static struct ipr_data ipr_data[NR_IRQS-TIMER_IRQ]; + +void set_ipr_data(unsigned int irq, int offset, int priority) +{ + ipr_data[irq-TIMER_IRQ].offset = offset; + ipr_data[irq-TIMER_IRQ].priority = priority; +} + +static void enable_onChip_irq(unsigned int irq); +void disable_onChip_irq(unsigned int irq); + +/* shutdown is same as "disable" */ +#define shutdown_onChip_irq disable_onChip_irq + +static void mask_and_ack_onChip(unsigned int); +static void end_onChip_irq(unsigned int irq); + +static unsigned int startup_onChip_irq(unsigned int irq) +{ + enable_onChip_irq(irq); + return 0; /* never anything pending */ +} + +static struct hw_interrupt_type onChip_irq_type = { + "On-Chip Supporting Module", + startup_onChip_irq, + shutdown_onChip_irq, + enable_onChip_irq, + disable_onChip_irq, + mask_and_ack_onChip, + end_onChip_irq +}; + +/* + * These have to be protected by the irq controller spinlock + * before being called. + * + * + * IPRA 15-12 11-8 7-4 3-0 + * IPRB 15-12 11-8 7-4 3-0 + * IPRC 15-12 11-8 7-4 3-0 + * + */ +#define INTC_IPR 0xfffffee2UL /* Word access */ + +void disable_onChip_irq(unsigned int irq) +{ + /* Set priority in IPR to 0 */ + int offset = ipr_data[irq-TIMER_IRQ].offset; + unsigned long intc_ipr_address = INTC_IPR + offset/16; + unsigned short mask = 0xffff ^ (0xf << (offset%16)); + unsigned long __dummy; + + asm volatile("mov.w @%1,%0\n\t" + "and %2,%0\n\t" + "mov.w %0,@%1" + : "=&z" (__dummy) + : "r" (intc_ipr_address), "r" (mask) + : "memory" ); +} + +static void enable_onChip_irq(unsigned int irq) +{ + /* Set priority in IPR back to original value */ + int offset = ipr_data[irq-TIMER_IRQ].offset; + int priority = ipr_data[irq-TIMER_IRQ].priority; + unsigned long intc_ipr_address = INTC_IPR + offset/16; + unsigned short value = (priority << (offset%16)); + unsigned long __dummy; + + asm volatile("mov.w @%1,%0\n\t" + "or %2,%0\n\t" + "mov.w %0,@%1" + : "=&z" (__dummy) + : "r" (intc_ipr_address), "r" (value) + : "memory" ); +} + +void make_onChip_irq(unsigned int irq) +{ + disable_irq_nosync(irq); + irq_desc[irq].handler = &onChip_irq_type; + enable_irq(irq); +} + +static void mask_and_ack_onChip(unsigned int irq) +{ + disable_onChip_irq(irq); + sti(); +} + +static void end_onChip_irq(unsigned int irq) +{ + enable_onChip_irq(irq); + cli(); +} + +void __init init_IRQ(void) +{ + int i; + + for (i = TIMER_IRQ; i < NR_IRQS; i++) { + irq_desc[i].handler = &onChip_irq_type; + } +} diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c new file mode 100644 index 000000000..744da694b --- /dev/null +++ b/arch/sh/kernel/process.c @@ -0,0 +1,303 @@ +/* + * linux/arch/sh/kernel/process.c + * + * Copyright (C) 1995 Linus Torvalds + * + * SuperH version: Copyright (C) 1999 Niibe Yutaka + */ + +/* + * This file handles the architecture-dependent parts of process handling.. + */ + +#define __KERNEL_SYSCALLS__ +#include <stdarg.h> + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/stddef.h> +#include <linux/ptrace.h> +#include <linux/malloc.h> +#include <linux/vmalloc.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/interrupt.h> +#include <linux/unistd.h> +#include <linux/delay.h> +#include <linux/reboot.h> +#include <linux/init.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/processor.h> +#include <asm/mmu_context.h> +#include <asm/elf.h> + +#include <linux/irq.h> + +static int hlt_counter=0; + +#define HARD_IDLE_TIMEOUT (HZ / 3) + +void disable_hlt(void) +{ + hlt_counter++; +} + +void enable_hlt(void) +{ + hlt_counter--; +} + +/* + * The idle loop on a uniprocessor i386.. + */ +void cpu_idle(void *unused) +{ + /* endless idle loop with no priority at all */ + init_idle(); + current->priority = 0; + current->counter = -100; + + while (1) { + while (!current->need_resched) { + if (hlt_counter) + continue; + __sti(); + asm volatile("sleep" : : : "memory"); + } + schedule(); + check_pgt_cache(); + } +} + +void machine_restart(char * __unused) +{ /* Need to set MMU_TTB?? */ +} + +void machine_halt(void) +{ +} + +void machine_power_off(void) +{ +} + +void show_regs(struct pt_regs * regs) +{ + printk("\n"); + printk("PC: [<%08lx>]", regs->pc); + printk(" SP: %08lx", regs->u_regs[UREG_SP]); + printk(" SR: %08lx\n", regs->sr); + printk("R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n", + regs->u_regs[0],regs->u_regs[1], + regs->u_regs[2],regs->u_regs[3]); + printk("R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n", + regs->u_regs[4],regs->u_regs[5], + regs->u_regs[6],regs->u_regs[7]); + printk("R8 : %08lx R9 : %08lx R10: %08lx R11: %08lx\n", + regs->u_regs[8],regs->u_regs[9], + regs->u_regs[10],regs->u_regs[11]); + printk("R12: %08lx R13: %08lx R14: %08lx\n", + regs->u_regs[12],regs->u_regs[13], + regs->u_regs[14]); + printk("MACH: %08lx MACL: %08lx GBR: %08lx PR: %08lx", + regs->mach, regs->macl, regs->gbr, regs->pr); +} + +struct task_struct * alloc_task_struct(void) +{ + /* Get two pages */ + return (struct task_struct *) __get_free_pages(GFP_KERNEL,1); +} + +void free_task_struct(struct task_struct *p) +{ + free_pages((unsigned long) p, 1); +} + +/* + * Create a kernel thread + */ + +/* + * This is the mechanism for creating a new kernel thread. + * + * NOTE! Only a kernel-only process(ie the swapper or direct descendants + * who haven't done an "execve()") should use this: it will work within + * a system call from a "real" process, but the process memory space will + * not be free'd until both the parent and the child have exited. + */ +int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) +{ /* Don't use this in BL=1(cli). Or else, CPU resets! */ + register unsigned long __sc0 __asm__ ("r0") = __NR_clone; + register unsigned long __sc4 __asm__ ("r4") = (long) flags | CLONE_VM; + register unsigned long __sc5 __asm__ ("r5") = 0; + register unsigned long __sc8 __asm__ ("r8") = (long) arg; + register unsigned long __sc9 __asm__ ("r9") = (long) fn; + __asm__ __volatile__( + "trapa #0\n\t" /* Linux/SH system call */ + "tst #0xff,r0\n\t" /* child or parent? */ + "bf 1f\n\t" /* parent - jump */ + "jsr @r9\n\t" /* call fn */ + " mov r8,r4\n\t" /* push argument */ + "mov r0,r4\n\t" /* return value to arg of exit */ + "mov %2,r0\n\t" /* exit */ + "trapa #0\n" + "1:" + :"=z" (__sc0) + :"0" (__sc0), "i" (__NR_exit), + "r" (__sc4), "r" (__sc5), "r" (__sc8), "r" (__sc9) + :"memory"); + return __sc0; +} + +/* + * Free current thread data structures etc.. + */ +void exit_thread(void) +{ + /* nothing to do ... */ +} + +void flush_thread(void) +{ + /* do nothing */ + /* Possibly, set clear debug registers */ +} + +void release_thread(struct task_struct *dead_task) +{ + /* do nothing */ +} + +/* Fill in the fpu structure for a core dump.. */ +int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r) +{ + return 0; /* Task didn't use the fpu at all. */ +} + +asmlinkage void ret_from_fork(void); + +int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, + struct task_struct *p, struct pt_regs *regs) +{ + struct pt_regs *childregs; + + childregs = ((struct pt_regs *)(THREAD_SIZE + (unsigned long) p)) - 1; + + *childregs = *regs; + if (user_mode(regs)) { + childregs->u_regs[UREG_SP] = usp; + } else { + childregs->u_regs[UREG_SP] = (unsigned long)p+2*PAGE_SIZE; + } + childregs->u_regs[0] = 0; /* Set return value for child */ + + p->thread.sp = (unsigned long) childregs; + p->thread.pc = (unsigned long) ret_from_fork; + if (p->mm) + p->mm->context = NO_CONTEXT; + + return 0; +} + +/* + * fill in the user structure for a core dump.. + */ +void dump_thread(struct pt_regs * regs, struct user * dump) +{ +/* changed the size calculations - should hopefully work better. lbt */ + dump->magic = CMAGIC; + dump->start_code = 0; + dump->start_stack = regs->u_regs[UREG_SP] & ~(PAGE_SIZE - 1); + dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT; + dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT; + dump->u_dsize -= dump->u_tsize; + dump->u_ssize = 0; + /* Debug registers will come here. */ + + if (dump->start_stack < TASK_SIZE) + dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT; + + dump->regs = *regs; +} + +/* + * switch_to(x,y) should switch tasks from x to y. + * + */ +void __switch_to(struct task_struct *prev, struct task_struct *next) +{ + /* + * Restore the kernel stack onto kernel mode register + * k4 (r4_bank1) + */ + asm volatile("ldc %0,r4_bank" + : /* no output */ + :"r" ((unsigned long)next+8192)); +} + +asmlinkage int sys_fork(unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + return do_fork(SIGCHLD, regs.u_regs[UREG_SP], ®s); +} + +asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + if (!newsp) + newsp = regs.u_regs[UREG_SP]; + return do_fork(clone_flags, newsp, ®s); +} + +/* + * This is trivial, and on the face of it looks like it + * could equally well be done in user mode. + * + * Not so, for quite unobvious reasons - register pressure. + * In user mode vfork() cannot have a stack frame, and if + * done by calling the "clone()" system call directly, you + * do not have enough call-clobbered registers to hold all + * the information you need. + */ +asmlinkage int sys_vfork(unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, + regs.u_regs[UREG_SP], ®s); +} + +/* + * sys_execve() executes a new program. + */ +asmlinkage int sys_execve(char *ufilename, char **uargv, + char **uenvp, unsigned long r7, + struct pt_regs regs) +{ + int error; + char *filename; + + lock_kernel(); + filename = getname(ufilename); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + goto out; + error = do_execve(filename, uargv, uenvp, ®s); + if (error == 0) + current->flags &= ~PF_DTRACE; + putname(filename); +out: + unlock_kernel(); + return error; +} diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c new file mode 100644 index 000000000..2d69b5b7c --- /dev/null +++ b/arch/sh/kernel/ptrace.c @@ -0,0 +1,476 @@ +/* + * Surely this doesn't work... (we need to design ptrace for SupreH) + * linux/arch/sh/kernel/ptrace.c + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/user.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/processor.h> + +/* + * does not yet catch signals sent when the child dies. + * in exit.c or in signal.c. + */ + +/* determines which flags the user has access to. */ +/* 1 = access 0 = no access */ +#define FLAG_MASK 0x00044dd5 + +/* set's the trap flag. */ +#define TRAP_FLAG 0x100 + +/* + * Offset of eflags on child stack.. + */ +#define EFL_OFFSET ((EFL-2)*4-sizeof(struct pt_regs)) + +/* + * this routine will get a word off of the processes privileged stack. + * the offset is how far from the base addr as stored in the TSS. + * this routine assumes that all the privileged stacks are in our + * data space. + */ +static inline int get_stack_long(struct task_struct *task, int offset) +{ + unsigned char *stack; + + stack = (unsigned char *)task->thread.sp; + stack += offset; + return (*((int *)stack)); +} + +/* + * this routine will put a word on the processes privileged stack. + * the offset is how far from the base addr as stored in the TSS. + * this routine assumes that all the privileged stacks are in our + * data space. + */ +static inline int put_stack_long(struct task_struct *task, int offset, + unsigned long data) +{ + unsigned char * stack; + + stack = (unsigned char *) task->thread.sp; + stack += offset; + *(unsigned long *) stack = data; + return 0; +} + +static int putreg(struct task_struct *child, + unsigned long regno, unsigned long value) +{ +#if 0 + switch (regno >> 2) { + case ORIG_EAX: + return -EIO; + case FS: + if (value && (value & 3) != 3) + return -EIO; + child->thread.fs = value; + return 0; + case GS: + if (value && (value & 3) != 3) + return -EIO; + child->thread.gs = value; + return 0; + case DS: + case ES: + if (value && (value & 3) != 3) + return -EIO; + value &= 0xffff; + break; + case SS: + case CS: + if ((value & 3) != 3) + return -EIO; + value &= 0xffff; + break; + case EFL: + value &= FLAG_MASK; + value |= get_stack_long(child, EFL_OFFSET) & ~FLAG_MASK; + } + if (regno > GS*4) + regno -= 2*4; + put_stack_long(child, regno - sizeof(struct pt_regs), value); +#endif + return 0; +} + +static unsigned long getreg(struct task_struct *child, + unsigned long regno) +{ + unsigned long retval = ~0UL; + +#if 0 + switch (regno >> 2) { + case FS: + retval = child->thread.fs; + break; + case GS: + retval = child->thread.gs; + break; + case DS: + case ES: + case SS: + case CS: + retval = 0xffff; + /* fall through */ + default: + if (regno > GS*4) + regno -= 2*4; + regno = regno - sizeof(struct pt_regs); + retval &= get_stack_long(child, regno); + } +#endif + return retval; +} + +asmlinkage int sys_ptrace(long request, long pid, long addr, long data) +{ + struct task_struct *child; + struct user * dummy = NULL; + unsigned long flags; + int i, ret; + + lock_kernel(); + ret = -EPERM; + if (request == PTRACE_TRACEME) { + /* are we already being traced? */ + if (current->flags & PF_PTRACED) + goto out; + /* set the ptrace bit in the process flags. */ + current->flags |= PF_PTRACED; + ret = 0; + goto out; + } + ret = -ESRCH; + read_lock(&tasklist_lock); + child = find_task_by_pid(pid); + read_unlock(&tasklist_lock); /* FIXME!!! */ + if (!child) + goto out; + ret = -EPERM; + if (pid == 1) /* you may not mess with init */ + goto out; + if (request == PTRACE_ATTACH) { + if (child == current) + goto out; + if ((!child->dumpable || + (current->uid != child->euid) || + (current->uid != child->suid) || + (current->uid != child->uid) || + (current->gid != child->egid) || + (current->gid != child->sgid) || + (!cap_issubset(child->cap_permitted, current->cap_permitted)) || + (current->gid != child->gid)) && !capable(CAP_SYS_PTRACE)) + goto out; + /* the same process cannot be attached many times */ + if (child->flags & PF_PTRACED) + goto out; + child->flags |= PF_PTRACED; + + write_lock_irqsave(&tasklist_lock, flags); + if (child->p_pptr != current) { + REMOVE_LINKS(child); + child->p_pptr = current; + SET_LINKS(child); + } + write_unlock_irqrestore(&tasklist_lock, flags); + + send_sig(SIGSTOP, child, 1); + ret = 0; + goto out; + } + ret = -ESRCH; + if (!(child->flags & PF_PTRACED)) + goto out; + if (child->state != TASK_STOPPED) { + if (request != PTRACE_KILL) + goto out; + } + if (child->p_pptr != current) + goto out; + + switch (request) { + /* when I and D space are separate, these will need to be fixed. */ + case PTRACE_PEEKTEXT: /* read word at location addr. */ + case PTRACE_PEEKDATA: { + unsigned long tmp; + int copied; + + copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0); + ret = -EIO; + if (copied != sizeof(tmp)) + goto out; + ret = put_user(tmp,(unsigned long *) data); + goto out; + } + + /* read the word at location addr in the USER area. */ + case PTRACE_PEEKUSR: { + unsigned long tmp; + + ret = -EIO; + if ((addr & 3) || addr < 0 || + addr > sizeof(struct user) - 3) + goto out; + + tmp = 0; /* Default return condition */ + if(addr < 17*sizeof(long)) + tmp = getreg(child, addr); +#if 0 + if(addr >= (long) &dummy->u_debugreg[0] && + addr <= (long) &dummy->u_debugreg[7]){ + addr -= (long) &dummy->u_debugreg[0]; + addr = addr >> 2; + tmp = child->thread.debugreg[addr]; + }; +#endif + ret = put_user(tmp,(unsigned long *) data); + goto out; + } + + /* when I and D space are separate, this will have to be fixed. */ + case PTRACE_POKETEXT: /* write the word at location addr. */ + case PTRACE_POKEDATA: + ret = 0; + if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data)) + goto out; + ret = -EIO; + goto out; + + case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ + ret = -EIO; + if ((addr & 3) || addr < 0 || + addr > sizeof(struct user) - 3) + goto out; + + if (addr < 17*sizeof(long)) { + ret = putreg(child, addr, data); + goto out; + } + + /* We need to be very careful here. We implicitly + want to modify a portion of the task_struct, and we + have to be selective about what portions we allow someone + to modify. */ +#if 0 + if(addr >= (long) &dummy->u_debugreg[0] && + addr <= (long) &dummy->u_debugreg[7]){ + + if(addr == (long) &dummy->u_debugreg[4]) return -EIO; + if(addr == (long) &dummy->u_debugreg[5]) return -EIO; + if(addr < (long) &dummy->u_debugreg[4] && + ((unsigned long) data) >= TASK_SIZE-3) return -EIO; + + ret = -EIO; + if(addr == (long) &dummy->u_debugreg[7]) { + data &= ~DR_CONTROL_RESERVED; + for(i=0; i<4; i++) + if ((0x5f54 >> ((data >> (16 + 4*i)) & 0xf)) & 1) + goto out; + }; + + addr -= (long) &dummy->u_debugreg; + addr = addr >> 2; + child->thread.debugreg[addr] = data; + ret = 0; + goto out; + }; +#endif + ret = -EIO; + goto out; + + case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ + case PTRACE_CONT: { /* restart after signal. */ + long tmp; + + ret = -EIO; + if ((unsigned long) data > _NSIG) + goto out; + if (request == PTRACE_SYSCALL) + child->flags |= PF_TRACESYS; + else + child->flags &= ~PF_TRACESYS; + child->exit_code = data; + /* make sure the single step bit is not set. */ +#if 0 + tmp = get_stack_long(child, EFL_OFFSET) & ~TRAP_FLAG; + put_stack_long(child, EFL_OFFSET,tmp); +#endif + wake_up_process(child); + ret = 0; + goto out; + } + +/* + * make the child exit. Best I can do is send it a sigkill. + * perhaps it should be put in the status that it wants to + * exit. + */ + case PTRACE_KILL: { + long tmp; + + ret = 0; + if (child->state == TASK_ZOMBIE) /* already dead */ + goto out; + child->exit_code = SIGKILL; + /* make sure the single step bit is not set. */ +#if 0 + tmp = get_stack_long(child, EFL_OFFSET) & ~TRAP_FLAG; + put_stack_long(child, EFL_OFFSET, tmp); +#endif + wake_up_process(child); + goto out; + } + + case PTRACE_SINGLESTEP: { /* set the trap flag. */ + long tmp; + + ret = -EIO; + if ((unsigned long) data > _NSIG) + goto out; + child->flags &= ~PF_TRACESYS; + if ((child->flags & PF_DTRACE) == 0) { + /* Spurious delayed TF traps may occur */ + child->flags |= PF_DTRACE; + } +#if 0 + tmp = get_stack_long(child, EFL_OFFSET) | TRAP_FLAG; + put_stack_long(child, EFL_OFFSET, tmp); +#endif + child->exit_code = data; + /* give it a chance to run. */ + wake_up_process(child); + ret = 0; + goto out; + } + + case PTRACE_DETACH: { /* detach a process that was attached. */ + long tmp; + + ret = -EIO; + if ((unsigned long) data > _NSIG) + goto out; + child->flags &= ~(PF_PTRACED|PF_TRACESYS); + child->exit_code = data; + write_lock_irqsave(&tasklist_lock, flags); + REMOVE_LINKS(child); + child->p_pptr = child->p_opptr; + SET_LINKS(child); + write_unlock_irqrestore(&tasklist_lock, flags); + /* make sure the single step bit is not set. */ +#if 0 + tmp = get_stack_long(child, EFL_OFFSET) & ~TRAP_FLAG; + put_stack_long(child, EFL_OFFSET, tmp); +#endif + wake_up_process(child); + ret = 0; + goto out; + } +#if 0 + case PTRACE_GETREGS: { /* Get all gp regs from the child. */ + if (!access_ok(VERIFY_WRITE, (unsigned *)data, + 17*sizeof(long))) + { + ret = -EIO; + goto out; + } + for ( i = 0; i < 17*sizeof(long); i += sizeof(long) ) + { + __put_user(getreg(child, i),(unsigned long *) data); + data += sizeof(long); + } + ret = 0; + goto out; + }; + + case PTRACE_SETREGS: { /* Set all gp regs in the child. */ + unsigned long tmp; + if (!access_ok(VERIFY_READ, (unsigned *)data, + 17*sizeof(long))) + { + ret = -EIO; + goto out; + } + for ( i = 0; i < 17*sizeof(long); i += sizeof(long) ) + { + __get_user(tmp, (unsigned long *) data); + putreg(child, i, tmp); + data += sizeof(long); + } + ret = 0; + goto out; + }; + + case PTRACE_GETFPREGS: { /* Get the child FPU state. */ + if (!access_ok(VERIFY_WRITE, (unsigned *)data, + sizeof(struct user_i387_struct))) + { + ret = -EIO; + goto out; + } + ret = 0; + if ( !child->used_math ) { + /* Simulate an empty FPU. */ + child->thread.i387.hard.cwd = 0xffff037f; + child->thread.i387.hard.swd = 0xffff0000; + child->thread.i387.hard.twd = 0xffffffff; + } + __copy_to_user((void *)data, &child->thread.i387.hard, + sizeof(struct user_i387_struct)); + goto out; + }; + + case PTRACE_SETFPREGS: { /* Set the child FPU state. */ + if (!access_ok(VERIFY_READ, (unsigned *)data, + sizeof(struct user_i387_struct))) + { + ret = -EIO; + goto out; + } + child->used_math = 1; + __copy_from_user(&child->thread.i387.hard, (void *)data, + sizeof(struct user_i387_struct)); + ret = 0; + goto out; + }; +#endif + default: + ret = -EIO; + goto out; + } +out: + unlock_kernel(); + return ret; +} + +asmlinkage void syscall_trace(void) +{ + if ((current->flags & (PF_PTRACED|PF_TRACESYS)) + != (PF_PTRACED|PF_TRACESYS)) + return; + current->exit_code = SIGTRAP; + current->state = TASK_STOPPED; + notify_parent(current, SIGCHLD); + schedule(); + /* + * this isn't the same as continuing with a signal, but it will do + * for normal use. strace only continues with a signal if the + * stopping signal is not SIGTRAP. -brl + */ + if (current->exit_code) { + send_sig(current->exit_code, current, 1); + current->exit_code = 0; + } +} diff --git a/arch/sh/kernel/semaphore.c b/arch/sh/kernel/semaphore.c new file mode 100644 index 000000000..b9f565dd8 --- /dev/null +++ b/arch/sh/kernel/semaphore.c @@ -0,0 +1,133 @@ +/* + * Just taken from alpha implementation. + * This can't work well, perhaps. + */ +/* + * Generic semaphore code. Buyer beware. Do your own + * specific changes in <asm/semaphore-helper.h> + */ + +#include <linux/sched.h> +#include <asm/semaphore-helper.h> + +/* + * Semaphores are implemented using a two-way counter: + * The "count" variable is decremented for each process + * that tries to sleep, while the "waking" variable is + * incremented when the "up()" code goes to wake up waiting + * processes. + * + * Notably, the inline "up()" and "down()" functions can + * efficiently test if they need to do any extra work (up + * needs to do something only if count was negative before + * the increment operation. + * + * waking_non_zero() (from asm/semaphore.h) must execute + * atomically. + * + * When __up() is called, the count was negative before + * incrementing it, and we need to wake up somebody. + * + * This routine adds one to the count of processes that need to + * wake up and exit. ALL waiting processes actually wake up but + * only the one that gets to the "waking" field first will gate + * through and acquire the semaphore. The others will go back + * to sleep. + * + * Note that these functions are only called when there is + * contention on the lock, and as such all this is the + * "non-critical" part of the whole semaphore business. The + * critical part is the inline stuff in <asm/semaphore.h> + * where we want to avoid any extra jumps and calls. + */ +void __up(struct semaphore *sem) +{ + wake_one_more(sem); + wake_up(&sem->wait); +} + +/* + * Perform the "down" function. Return zero for semaphore acquired, + * return negative for signalled out of the function. + * + * If called from __down, the return is ignored and the wait loop is + * not interruptible. This means that a task waiting on a semaphore + * using "down()" cannot be killed until someone does an "up()" on + * the semaphore. + * + * If called from __down_interruptible, the return value gets checked + * upon return. If the return value is negative then the task continues + * with the negative value in the return register (it can be tested by + * the caller). + * + * Either form may be used in conjunction with "up()". + * + */ + +#define DOWN_VAR \ + struct task_struct *tsk = current; \ + wait_queue_t wait; \ + init_waitqueue_entry(&wait, tsk); + +#define DOWN_HEAD(task_state) \ + \ + \ + tsk->state = (task_state); \ + add_wait_queue(&sem->wait, &wait); \ + \ + /* \ + * Ok, we're set up. sem->count is known to be less than zero \ + * so we must wait. \ + * \ + * We can let go the lock for purposes of waiting. \ + * We re-acquire it after awaking so as to protect \ + * all semaphore operations. \ + * \ + * If "up()" is called before we call waking_non_zero() then \ + * we will catch it right away. If it is called later then \ + * we will have to go through a wakeup cycle to catch it. \ + * \ + * Multiple waiters contend for the semaphore lock to see \ + * who gets to gate through and who has to wait some more. \ + */ \ + for (;;) { + +#define DOWN_TAIL(task_state) \ + tsk->state = (task_state); \ + } \ + tsk->state = TASK_RUNNING; \ + remove_wait_queue(&sem->wait, &wait); + +void __down(struct semaphore * sem) +{ + DOWN_VAR + DOWN_HEAD(TASK_UNINTERRUPTIBLE) + if (waking_non_zero(sem)) + break; + schedule(); + DOWN_TAIL(TASK_UNINTERRUPTIBLE) +} + +int __down_interruptible(struct semaphore * sem) +{ + int ret = 0; + DOWN_VAR + DOWN_HEAD(TASK_INTERRUPTIBLE) + + ret = waking_non_zero_interruptible(sem, tsk); + if (ret) + { + if (ret == 1) + /* ret != 0 only if we get interrupted -arca */ + ret = 0; + break; + } + schedule(); + DOWN_TAIL(TASK_INTERRUPTIBLE) + return ret; +} + +int __down_trylock(struct semaphore * sem) +{ + return waking_non_zero_trylock(sem); +} diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c new file mode 100644 index 000000000..6714fd96d --- /dev/null +++ b/arch/sh/kernel/setup.c @@ -0,0 +1,188 @@ +/* + * linux/arch/sh/kernel/setup.c + * + * Copyright (C) 1999 Niibe Yutaka + * + */ + +/* + * This file handles the architecture-dependent parts of initialization + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/malloc.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/tty.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/config.h> +#include <linux/init.h> +#ifdef CONFIG_BLK_DEV_RAM +#include <linux/blk.h> +#endif +#include <asm/processor.h> +#include <linux/console.h> +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/smp.h> + +/* + * Machine setup.. + */ + +struct sh_cpuinfo boot_cpu_data = { 0, 0, 0, 0, }; +extern int _text, _etext, _edata, _end, _stext, __bss_start; + +#ifdef CONFIG_BLK_DEV_RAM +extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */ +extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */ +extern int rd_image_start; /* starting block # of image */ +#endif + +extern int root_mountflags; + +#define COMMAND_LINE_SIZE 1024 +static char command_line[COMMAND_LINE_SIZE] = { 0, }; + char saved_command_line[COMMAND_LINE_SIZE]; + +extern unsigned char *root_fs_image; + +struct resource standard_io_resources[] = { + { "dma1", 0x00, 0x1f }, + { "pic1", 0x20, 0x3f }, + { "timer", 0x40, 0x5f }, + { "keyboard", 0x60, 0x6f }, + { "dma page reg", 0x80, 0x8f }, + { "pic2", 0xa0, 0xbf }, + { "dma2", 0xc0, 0xdf }, + { "fpu", 0xf0, 0xff } +}; + +#define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource)) + + +/* System RAM - interrupted by the 640kB-1M hole */ +#define code_resource (ram_resources[3]) +#define data_resource (ram_resources[4]) +static struct resource ram_resources[] = { + { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY }, + { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY }, + { "Video RAM area", 0x0a0000, 0x0bffff }, + { "Kernel code", 0x100000, 0 }, + { "Kernel data", 0, 0 } +}; + +/* System ROM resources */ +#define MAXROMS 6 +static struct resource rom_resources[MAXROMS] = { + { "System ROM", 0xF0000, 0xFFFFF, IORESOURCE_BUSY }, + { "Video ROM", 0xc0000, 0xc7fff } +}; + + +void __init setup_arch(char **cmdline_p, + unsigned long * memory_start_p, + unsigned long * memory_end_p) +{ + *cmdline_p = command_line; + *memory_start_p = (unsigned long) &_end; + *memory_end_p = 0x8c400000; /* For my board. */ + ram_resources[1].end = *memory_end_p-1; + + init_mm.start_code = (unsigned long)&_stext; + init_mm.end_code = (unsigned long) &_etext; + init_mm.end_data = (unsigned long) &_edata; + init_mm.brk = (unsigned long) &_end; + + code_resource.start = virt_to_bus(&_text); + code_resource.end = virt_to_bus(&_etext)-1; + data_resource.start = virt_to_bus(&_etext); + data_resource.end = virt_to_bus(&_edata)-1; + + ROOT_DEV = MKDEV(FLOPPY_MAJOR, 0); + + initrd_below_start_ok = 1; + initrd_start = (long)&root_fs_image; + initrd_end = (long)&__bss_start; + mount_initrd = 1; + + +#if 0 + /* Request the standard RAM and ROM resources - they eat up PCI memory space */ + request_resource(&iomem_resource, ram_resources+0); + request_resource(&iomem_resource, ram_resources+1); + request_resource(&iomem_resource, ram_resources+2); + request_resource(ram_resources+1, &code_resource); + request_resource(ram_resources+1, &data_resource); +#endif + +#if 0 + for (i = 0; i < STANDARD_IO_RESOURCES; i++) + request_resource(&ioport_resource, standard_io_resources+i); +#endif + +#if 0 + rd_image_start = (long)root_fs_image; + rd_prompt = 0; + rd_doload = 1; +#endif + +#if 0 + ROOT_DEV = to_kdev_t(ORIG_ROOT_DEV); + +#ifdef CONFIG_BLK_DEV_RAM + rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; + rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); + rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); +#endif + + if (!MOUNT_ROOT_RDONLY) + root_mountflags &= ~MS_RDONLY; +#endif + +#ifdef CONFIG_BLK_DEV_INITRD +#if 0 + if (LOADER_TYPE) { + initrd_start = INITRD_START ? INITRD_START + PAGE_OFFSET : 0; + initrd_end = initrd_start+INITRD_SIZE; + if (initrd_end > memory_end) { + printk("initrd extends beyond end of memory " + "(0x%08lx > 0x%08lx)\ndisabling initrd\n", + initrd_end,memory_end); + initrd_start = 0; + } + } +#endif + +#endif +} + +/* + * Get CPU information for use by the procfs. + */ + +int get_cpuinfo(char *buffer) +{ + char *p = buffer; + +#ifdef CONFIG_CPU_SH3 + p += sprintf(p,"cpu family\t: SH3\n" + "cache size\t: 8K-byte\n"); +#elif CONFIG_CPU_SH4 + p += sprintf(p,"cpu family\t: SH4\n" + "cache size\t: ??K-byte\n"); +#endif + p += sprintf(p, "bogomips\t: %lu.%02lu\n\n", + (loops_per_sec+2500)/500000, + ((loops_per_sec+2500)/5000) % 100); + + return p - buffer; +} diff --git a/arch/sh/kernel/sh_ksyms.c b/arch/sh/kernel/sh_ksyms.c new file mode 100644 index 000000000..2b1b9ea2e --- /dev/null +++ b/arch/sh/kernel/sh_ksyms.c @@ -0,0 +1,48 @@ +#include <linux/config.h> +#include <linux/module.h> +#include <linux/smp.h> +#include <linux/user.h> +#include <linux/elfcore.h> +#include <linux/mca.h> +#include <linux/sched.h> +#include <linux/in6.h> +#include <linux/interrupt.h> +#include <linux/smp_lock.h> + +#include <asm/semaphore.h> +#include <asm/processor.h> +#include <asm/uaccess.h> +#include <asm/checksum.h> +#include <asm/io.h> +#include <asm/hardirq.h> +#include <asm/delay.h> +#include <asm/irq.h> + +extern void dump_thread(struct pt_regs *, struct user *); +extern int dump_fpu(elf_fpregset_t *); + +#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE) +extern struct drive_info_struct drive_info; +EXPORT_SYMBOL(drive_info); +#endif + +/* platform dependent support */ +EXPORT_SYMBOL(dump_thread); +EXPORT_SYMBOL(dump_fpu); +EXPORT_SYMBOL(iounmap); +EXPORT_SYMBOL(local_bh_count); +EXPORT_SYMBOL(local_irq_count); +EXPORT_SYMBOL(enable_irq); +EXPORT_SYMBOL(disable_irq); +EXPORT_SYMBOL(kernel_thread); + +/* Networking helper routines. */ +EXPORT_SYMBOL(csum_partial_copy); + +EXPORT_SYMBOL(strtok); +EXPORT_SYMBOL(strpbrk); +EXPORT_SYMBOL(strstr); + +#ifdef CONFIG_VT +EXPORT_SYMBOL(screen_info); +#endif diff --git a/arch/sh/kernel/signal.c b/arch/sh/kernel/signal.c new file mode 100644 index 000000000..66fa36c85 --- /dev/null +++ b/arch/sh/kernel/signal.c @@ -0,0 +1,597 @@ +/* + * linux/arch/sh/kernel/signal.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson + * + * SuperH version: Copyright (C) 1999 Niibe Yutaka + * + */ + +#include <linux/config.h> + +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/errno.h> +#include <linux/wait.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/stddef.h> +#include <asm/ucontext.h> +#include <asm/uaccess.h> + +#define DEBUG_SIG 0 + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +asmlinkage int sys_wait4(pid_t pid, unsigned long *stat_addr, + int options, unsigned long *ru); +asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset); + +/* + * Atomically swap in the new signal mask, and wait for a signal. + */ +asmlinkage int +sys_sigsuspend(old_sigset_t mask, + unsigned long r5, unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + sigset_t saveset; + + mask &= _BLOCKABLE; + spin_lock_irq(¤t->sigmask_lock); + saveset = current->blocked; + siginitset(¤t->blocked, mask); + recalc_sigpending(current); + spin_unlock_irq(¤t->sigmask_lock); + + regs.u_regs[0] = -EINTR; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + if (do_signal(®s,&saveset)) + return -EINTR; + } +} + +asmlinkage int +sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + sigset_t saveset, newset; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&newset, unewset, sizeof(newset))) + return -EFAULT; + sigdelsetmask(&newset, ~_BLOCKABLE); + + spin_lock_irq(¤t->sigmask_lock); + saveset = current->blocked; + current->blocked = newset; + recalc_sigpending(current); + spin_unlock_irq(¤t->sigmask_lock); + + regs.u_regs[0] = -EINTR; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + if (do_signal(®s, &saveset)) + return -EINTR; + } +} + +asmlinkage int +sys_sigaction(int sig, const struct old_sigaction *act, + struct old_sigaction *oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (verify_area(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + return -EFAULT; + __get_user(new_ka.sa.sa_flags, &act->sa_flags); + __get_user(mask, &act->sa_mask); + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + return -EFAULT; + __put_user(old_ka.sa.sa_flags, &oact->sa_flags); + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); + } + + return ret; +} + +asmlinkage int +sys_sigaltstack(const stack_t *uss, stack_t *uoss, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + return do_sigaltstack(uss, uoss, regs.u_regs[UREG_SP]); +} + + +/* + * Do a signal return; undo the signal stack. + */ + +struct sigframe +{ + struct sigcontext sc; + /* FPU should come here: SH-3 has no FPU */ + unsigned long extramask[_NSIG_WORDS-1]; + char retcode[4]; +}; + +struct rt_sigframe +{ + struct siginfo *pinfo; + void *puc; + struct siginfo info; + struct ucontext uc; + /* FPU should come here: SH-3 has no FPU */ + char retcode[4]; +}; + + +static int +restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *r0_p) +{ + unsigned int err = 0; + +#define COPY(x) err |= __get_user(regs->x, &sc->x) + COPY(u_regs[1]); + COPY(u_regs[2]); COPY(u_regs[3]); + COPY(u_regs[4]); COPY(u_regs[5]); + COPY(u_regs[6]); COPY(u_regs[7]); + COPY(u_regs[8]); COPY(u_regs[9]); + COPY(u_regs[10]); COPY(u_regs[11]); + COPY(u_regs[12]); COPY(u_regs[13]); + COPY(u_regs[14]); COPY(u_regs[15]); + COPY(gbr); COPY(mach); + COPY(macl); COPY(pr); + COPY(sr); COPY(pc); +#undef COPY + + regs->syscall_nr = -1; /* disable syscall checks */ + err |= __get_user(*r0_p, &sc->u_regs[0]); + + return err; +} + +asmlinkage int sys_sigreturn(unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + struct sigframe *frame = (struct sigframe *)regs.u_regs[UREG_SP]; + sigset_t set; + int r0; + + if (verify_area(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + if (__get_user(set.sig[0], &frame->sc.oldmask) + || (_NSIG_WORDS > 1 + && __copy_from_user(&set.sig[1], &frame->extramask, + sizeof(frame->extramask)))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sigmask_lock); + current->blocked = set; + recalc_sigpending(current); + spin_unlock_irq(¤t->sigmask_lock); + + if (restore_sigcontext(®s, &frame->sc, &r0)) + goto badframe; + return r0; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + struct rt_sigframe *frame = (struct rt_sigframe *)regs.u_regs[UREG_SP]; + sigset_t set; + stack_t st; + int r0; + + if (verify_area(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sigmask_lock); + current->blocked = set; + recalc_sigpending(current); + spin_unlock_irq(¤t->sigmask_lock); + + if (restore_sigcontext(®s, &frame->uc.uc_mcontext, &r0)) + goto badframe; + + if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st))) + goto badframe; + /* It is more difficult to avoid calling this function than to + call it and ignore errors. */ + do_sigaltstack(&st, NULL, regs.u_regs[UREG_SP]); + + return r0; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +/* + * Set up a signal frame. + */ + +static int +setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, + unsigned long mask) +{ + int err = 0; + +#define COPY(x) err |= __put_user(regs->x, &sc->x) + COPY(u_regs[0]); COPY(u_regs[1]); + COPY(u_regs[2]); COPY(u_regs[3]); + COPY(u_regs[4]); COPY(u_regs[5]); + COPY(u_regs[6]); COPY(u_regs[7]); + COPY(u_regs[8]); COPY(u_regs[9]); + COPY(u_regs[10]); COPY(u_regs[11]); + COPY(u_regs[12]); COPY(u_regs[13]); + COPY(u_regs[14]); COPY(u_regs[15]); + COPY(gbr); COPY(mach); + COPY(macl); COPY(pr); + COPY(sr); COPY(pc); +#undef COPY + + /* non-iBCS2 extensions.. */ + err |= __put_user(mask, &sc->oldmask); + + return err; +} + +/* + * Determine which stack to use.. + */ +static inline void * +get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) +{ + if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp)) + sp = current->sas_ss_sp + current->sas_ss_size; + + return (void *)((sp - frame_size) & -8ul); +} + +static void setup_frame(int sig, struct k_sigaction *ka, + sigset_t *set, struct pt_regs *regs) +{ + struct sigframe *frame; + int err = 0; + int signal; + + frame = get_sigframe(ka, regs->u_regs[UREG_SP], sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto give_sigsegv; + + signal = current->exec_domain + && current->exec_domain->signal_invmap + && sig < 32 + ? current->exec_domain->signal_invmap[sig] + : sig; + + err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); + + if (_NSIG_WORDS > 1) { + err |= __copy_to_user(frame->extramask, &set->sig[1], + sizeof(frame->extramask)); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa.sa_flags & SA_RESTORER) { + regs->pr = (unsigned long) ka->sa.sa_restorer; + } else { + /* This is ; mov #__NR_sigreturn,r0 ; trapa #0 */ +#ifdef CONFIG_LITTLE_ENDIAN + unsigned long code = 0x00c300e0 | (__NR_sigreturn << 8); +#else + unsigned long code = 0xe000c300 | (__NR_sigreturn << 16); +#endif + + regs->pr = (unsigned long) frame->retcode; + err |= __put_user(code, (long *)(frame->retcode+0)); + } + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + regs->u_regs[UREG_SP] = (unsigned long) frame; + regs->u_regs[4] = signal; /* Arg for signal handler */ + regs->pc = (unsigned long) ka->sa.sa_handler; + + set_fs(USER_DS); + +#if DEBUG_SIG + printk("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n", + current->comm, current->pid, frame, regs->pc, regs->pr); +#endif + + return; + +give_sigsegv: + if (sig == SIGSEGV) + ka->sa.sa_handler = SIG_DFL; + force_sig(SIGSEGV, current); +} + +static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) +{ + struct rt_sigframe *frame; + int err = 0; + int signal; + + frame = get_sigframe(ka, regs->u_regs[UREG_SP], sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto give_sigsegv; + + signal = current->exec_domain + && current->exec_domain->signal_invmap + && sig < 32 + ? current->exec_domain->signal_invmap[sig] + : sig; + + err |= __put_user(&frame->info, &frame->pinfo); + err |= __put_user(&frame->uc, &frame->puc); + err |= __copy_to_user(&frame->info, info, sizeof(*info)); + + /* Create the ucontext. */ + err |= __put_user(0, &frame->uc.uc_flags); + err |= __put_user(0, &frame->uc.uc_link); + err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); + err |= __put_user(sas_ss_flags(regs->u_regs[UREG_SP]), + &frame->uc.uc_stack.ss_flags); + err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= setup_sigcontext(&frame->uc.uc_mcontext, + regs, set->sig[0]); + err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa.sa_flags & SA_RESTORER) { + regs->pr = (unsigned long) ka->sa.sa_restorer; + } else { + /* This is ; mov #__NR_sigreturn,r0 ; trapa #0 */ +#ifdef CONFIG_LITTLE_ENDIAN + unsigned long code = 0x00c300e0 | (__NR_sigreturn << 8); +#else + unsigned long code = 0xe000c300 | (__NR_sigreturn << 16); +#endif + + regs->pr = (unsigned long) frame->retcode; + err |= __put_user(code, (long *)(frame->retcode+0)); + } + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + regs->u_regs[UREG_SP] = (unsigned long) frame; + regs->u_regs[4] = signal; /* Arg for signal handler */ + regs->pc = (unsigned long) ka->sa.sa_handler; + + set_fs(USER_DS); + +#if DEBUG_SIG + printk("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n", + current->comm, current->pid, frame, regs->pc, regs->pr); +#endif + + return; + +give_sigsegv: + if (sig == SIGSEGV) + ka->sa.sa_handler = SIG_DFL; + force_sig(SIGSEGV, current); +} + +/* + * OK, we're invoking a handler + */ + +static void +handle_signal(unsigned long sig, struct k_sigaction *ka, + siginfo_t *info, sigset_t *oldset, struct pt_regs * regs) +{ + /* Are we from a system call? */ + if (regs->syscall_nr >= 0) { + /* If so, check system call restarting.. */ + switch (regs->u_regs[0]) { + case -ERESTARTNOHAND: + regs->u_regs[0] = -EINTR; + break; + + case -ERESTARTSYS: + if (!(ka->sa.sa_flags & SA_RESTART)) { + regs->u_regs[0] = -EINTR; + break; + } + /* fallthrough */ + case -ERESTARTNOINTR: + regs->u_regs[0] = regs->syscall_nr; + regs->pc -= 2; + } + } + + /* Set up the stack frame */ + if (ka->sa.sa_flags & SA_SIGINFO) + setup_rt_frame(sig, ka, info, oldset, regs); + else + setup_frame(sig, ka, oldset, regs); + + if (ka->sa.sa_flags & SA_ONESHOT) + ka->sa.sa_handler = SIG_DFL; + + if (!(ka->sa.sa_flags & SA_NODEFER)) { + spin_lock_irq(¤t->sigmask_lock); + sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); + sigaddset(¤t->blocked,sig); + recalc_sigpending(current); + spin_unlock_irq(¤t->sigmask_lock); + } +} + +/* + * Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + * + * Note that we go through the signals twice: once to check the signals that + * the kernel can handle, and then we build all the user-level signal handling + * stack-frames in one go after that. + */ +int do_signal(struct pt_regs *regs, sigset_t *oldset) +{ + siginfo_t info; + struct k_sigaction *ka; + + if (!oldset) + oldset = ¤t->blocked; + + for (;;) { + unsigned long signr; + + spin_lock_irq(¤t->sigmask_lock); + signr = dequeue_signal(¤t->blocked, &info); + spin_unlock_irq(¤t->sigmask_lock); + + if (!signr) + break; + + if ((current->flags & PF_PTRACED) && signr != SIGKILL) { + /* Let the debugger run. */ + current->exit_code = signr; + current->state = TASK_STOPPED; + notify_parent(current, SIGCHLD); + schedule(); + + /* We're back. Did the debugger cancel the sig? */ + if (!(signr = current->exit_code)) + continue; + current->exit_code = 0; + + /* The debugger continued. Ignore SIGSTOP. */ + if (signr == SIGSTOP) + continue; + + /* Update the siginfo structure. Is this good? */ + if (signr != info.si_signo) { + info.si_signo = signr; + info.si_errno = 0; + info.si_code = SI_USER; + info.si_pid = current->p_pptr->pid; + info.si_uid = current->p_pptr->uid; + } + + /* If the (new) signal is now blocked, requeue it. */ + if (sigismember(¤t->blocked, signr)) { + send_sig_info(signr, &info, current); + continue; + } + } + + ka = ¤t->sig->action[signr-1]; + if (ka->sa.sa_handler == SIG_IGN) { + if (signr != SIGCHLD) + continue; + /* Check for SIGCHLD: it's special. */ + while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0) + /* nothing */; + continue; + } + + if (ka->sa.sa_handler == SIG_DFL) { + int exit_code = signr; + + /* Init gets no signals it doesn't want. */ + if (current->pid == 1) + continue; + + switch (signr) { + case SIGCONT: case SIGCHLD: case SIGWINCH: + continue; + + case SIGTSTP: case SIGTTIN: case SIGTTOU: + if (is_orphaned_pgrp(current->pgrp)) + continue; + /* FALLTHRU */ + + case SIGSTOP: + current->state = TASK_STOPPED; + current->exit_code = signr; + if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDSTOP)) + notify_parent(current, SIGCHLD); + schedule(); + continue; + + case SIGQUIT: case SIGILL: case SIGTRAP: + case SIGABRT: case SIGFPE: case SIGSEGV: + if (do_coredump(signr, regs)) + exit_code |= 0x80; + /* FALLTHRU */ + + default: + lock_kernel(); + sigaddset(¤t->signal, signr); + recalc_sigpending(current); + current->flags |= PF_SIGNALED; + do_exit(exit_code); + /* NOTREACHED */ + } + } + + /* Whee! Actually deliver the signal. */ + handle_signal(signr, ka, &info, oldset, regs); + return 1; + } + + /* Did we come from a system call? */ + if (regs->syscall_nr >= 0) { + /* Restart the system call - no handlers present */ + if (regs->u_regs[0] == -ERESTARTNOHAND || + regs->u_regs[0] == -ERESTARTSYS || + regs->u_regs[0] == -ERESTARTNOINTR) { + regs->u_regs[0] = regs->syscall_nr; + regs->pc -= 2; + } + } + return 0; +} diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c new file mode 100644 index 000000000..6999cff81 --- /dev/null +++ b/arch/sh/kernel/sys_sh.c @@ -0,0 +1,249 @@ +/* + * linux/arch/i386/kernel/sys_i386.c + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/i386 + * platform. + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/mman.h> +#include <linux/file.h> +#include <linux/utsname.h> + +#include <asm/uaccess.h> +#include <asm/ipc.h> + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way Unix traditionally does this, though. + */ +asmlinkage int sys_pipe(unsigned long * fildes) +{ + int fd[2]; + int error; + + lock_kernel(); + error = do_pipe(fd); + unlock_kernel(); + if (!error) { + if (copy_to_user(fildes, fd, 2*sizeof(int))) + error = -EFAULT; + } + return error; +} + +/* + * Perform the select(nd, in, out, ex, tv) and mmap() system + * calls. Linux/i386 didn't use to be able to handle more than + * 4 system call parameters, so these system calls used a memory + * block for parameter passing.. + */ + +struct mmap_arg_struct { + unsigned long addr; + unsigned long len; + unsigned long prot; + unsigned long flags; + unsigned long fd; + unsigned long offset; +}; + +asmlinkage int old_mmap(struct mmap_arg_struct *arg) +{ + int error = -EFAULT; + struct file * file = NULL; + struct mmap_arg_struct a; + + if (copy_from_user(&a, arg, sizeof(a))) + return -EFAULT; + + down(¤t->mm->mmap_sem); + lock_kernel(); + if (!(a.flags & MAP_ANONYMOUS)) { + error = -EBADF; + file = fget(a.fd); + if (!file) + goto out; + } + a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + + error = do_mmap(file, a.addr, a.len, a.prot, a.flags, a.offset); + if (file) + fput(file); +out: + unlock_kernel(); + up(¤t->mm->mmap_sem); + return error; +} + +extern asmlinkage int sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *); + +struct sel_arg_struct { + unsigned long n; + fd_set *inp, *outp, *exp; + struct timeval *tvp; +}; + +asmlinkage int old_select(struct sel_arg_struct *arg) +{ + struct sel_arg_struct a; + + if (copy_from_user(&a, arg, sizeof(a))) + return -EFAULT; + /* sys_select() does the appropriate kernel locking */ + return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); +} + +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. + */ +asmlinkage int sys_ipc (uint call, int first, int second, + int third, void *ptr, long fifth) +{ + int version, ret; + + version = call >> 16; /* hack for backward compatibility */ + call &= 0xffff; + + if (call <= SEMCTL) + switch (call) { + case SEMOP: + return sys_semop (first, (struct sembuf *)ptr, second); + case SEMGET: + return sys_semget (first, second, third); + case SEMCTL: { + union semun fourth; + if (!ptr) + return -EINVAL; + if (get_user(fourth.__pad, (void **) ptr)) + return -EFAULT; + return sys_semctl (first, second, third, fourth); + } + default: + return -EINVAL; + } + + if (call <= MSGCTL) + switch (call) { + case MSGSND: + return sys_msgsnd (first, (struct msgbuf *) ptr, + second, third); + case MSGRCV: + switch (version) { + case 0: { + struct ipc_kludge tmp; + if (!ptr) + return -EINVAL; + + if (copy_from_user(&tmp, + (struct ipc_kludge *) ptr, + sizeof (tmp))) + return -EFAULT; + return sys_msgrcv (first, tmp.msgp, second, + tmp.msgtyp, third); + } + default: + return sys_msgrcv (first, + (struct msgbuf *) ptr, + second, fifth, third); + } + case MSGGET: + return sys_msgget ((key_t) first, second); + case MSGCTL: + return sys_msgctl (first, second, + (struct msqid_ds *) ptr); + default: + return -EINVAL; + } + if (call <= SHMCTL) + switch (call) { + case SHMAT: + switch (version) { + default: { + ulong raddr; + ret = sys_shmat (first, (char *) ptr, + second, &raddr); + if (ret) + return ret; + return put_user (raddr, (ulong *) third); + } + case 1: /* iBCS2 emulator entry point */ + if (!segment_eq(get_fs(), get_ds())) + return -EINVAL; + return sys_shmat (first, (char *) ptr, + second, (ulong *) third); + } + case SHMDT: + return sys_shmdt ((char *)ptr); + case SHMGET: + return sys_shmget (first, second, third); + case SHMCTL: + return sys_shmctl (first, second, + (struct shmid_ds *) ptr); + default: + return -EINVAL; + } + + return -EINVAL; +} + +/* + * Old cruft + */ +asmlinkage int sys_uname(struct old_utsname * name) +{ + int err; + if (!name) + return -EFAULT; + down(&uts_sem); + err=copy_to_user(name, &system_utsname, sizeof (*name)); + up(&uts_sem); + return err?-EFAULT:0; +} + +asmlinkage int sys_olduname(struct oldold_utsname * name) +{ + int error; + + if (!name) + return -EFAULT; + if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) + return -EFAULT; + + down(&uts_sem); + + error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); + error |= __put_user(0,name->sysname+__OLD_UTS_LEN); + error |= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); + error |= __put_user(0,name->nodename+__OLD_UTS_LEN); + error |= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); + error |= __put_user(0,name->release+__OLD_UTS_LEN); + error |= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); + error |= __put_user(0,name->version+__OLD_UTS_LEN); + error |= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN); + error |= __put_user(0,name->machine+__OLD_UTS_LEN); + + up(&uts_sem); + + error = error ? -EFAULT : 0; + + return error; +} + +asmlinkage int sys_pause(void) +{ + current->state = TASK_INTERRUPTIBLE; + schedule(); + return -ERESTARTNOHAND; +} diff --git a/arch/sh/kernel/test-img.c b/arch/sh/kernel/test-img.c new file mode 100644 index 000000000..daade9f6d --- /dev/null +++ b/arch/sh/kernel/test-img.c @@ -0,0 +1,69 @@ +unsigned char root_fs_image[] +__attribute__((__section__(".data.disk_image"))) += { 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+#include <linux/init.h> +#include <linux/smp.h> + +#include <asm/processor.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/delay.h> + +#include <linux/timex.h> +#include <linux/irq.h> + +#define TMU_TOCR 0xfffffe90 /* Byte access */ +#define TMU_TSTR 0xfffffe92 /* Byte access */ + +#define TMU0_TCOR 0xfffffe94 /* Long access */ +#define TMU0_TCNT 0xfffffe98 /* Long access */ +#define TMU0_TCR 0xfffffe9c /* Word access */ + +#define TMU_TOCR_INIT 0x00 +#define TMU0_TCR_INIT 0x0020 +#define TMU_TSTR_INIT 1 + +#define CLOCK_MHZ (60/4) +#define INTERVAL 37500 /* (1000000*CLOCK_MHZ/HZ/2) ??? */ + +extern rwlock_t xtime_lock; +#define TICK_SIZE tick + +void do_gettimeofday(struct timeval *tv) +{ + extern volatile unsigned long lost_ticks; + unsigned long flags; + unsigned long usec, sec; + + read_lock_irqsave(&xtime_lock, flags); + usec = 0; + { + unsigned long lost = lost_ticks; + if (lost) + usec += lost * (1000000 / HZ); + } + sec = xtime.tv_sec; + usec += xtime.tv_usec; + read_unlock_irqrestore(&xtime_lock, flags); + + while (usec >= 1000000) { + usec -= 1000000; + sec++; + } + + tv->tv_sec = sec; + tv->tv_usec = usec; +} + +void do_settimeofday(struct timeval *tv) +{ + write_lock_irq(&xtime_lock); + xtime = *tv; + time_adjust = 0; /* stop active adjtime() */ + time_status |= STA_UNSYNC; + time_maxerror = NTP_PHASE_LIMIT; + time_esterror = NTP_PHASE_LIMIT; + write_unlock_irq(&xtime_lock); +} + +/* + */ +static int set_rtc_time(unsigned long nowtime) +{ +/* XXX should be implemented XXXXXXXXXX */ + int retval = -1; + + return retval; +} + +/* last time the RTC clock got updated */ +static long last_rtc_update = 0; + +/* + * timer_interrupt() needs to keep up the real-time clock, + * as well as call the "do_timer()" routine every clocktick + */ +static inline void do_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + do_timer(regs); + +#if 0 + if (!user_mode(regs)) + sh_do_profile(regs->pc); +#endif + + /* + * If we have an externally synchronized Linux clock, then update + * RTC clock accordingly every ~11 minutes. Set_rtc_mmss() has to be + * called as close as possible to 500 ms before the new second starts. + */ + if ((time_status & STA_UNSYNC) == 0 && + xtime.tv_sec > last_rtc_update + 660 && + xtime.tv_usec >= 500000 - ((unsigned) tick) / 2 && + xtime.tv_usec <= 500000 + ((unsigned) tick) / 2) { + if (set_rtc_time(xtime.tv_sec) == 0) + last_rtc_update = xtime.tv_sec; + else + last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */ + } +} + +/* + * This is the same as the above, except we _also_ save the current + * Time Stamp Counter value at the time of the timer interrupt, so that + * we later on can estimate the time of day more exactly. + */ +static void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + unsigned long __dummy; + + /* Clear UNF bit */ + asm volatile("mov.w %1,%0\n\t" + "and %2,%0\n\t" + "mov.w %0,%1" + : "=&z" (__dummy) + : "m" (__m(TMU0_TCR)), "r" (~0x100)); + + /* + * Here we are in the timer irq handler. We just have irqs locally + * disabled but we don't know if the timer_bh is running on the other + * CPU. We need to avoid to SMP race with it. NOTE: we don' t need + * the irq version of write_lock because as just said we have irq + * locally disabled. -arca + */ + write_lock(&xtime_lock); + + do_timer_interrupt(irq, NULL, regs); + + write_unlock(&xtime_lock); +} + +/* Converts Gregorian date to seconds since 1970-01-01 00:00:00. + * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 + * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. + * + * [For the Julian calendar (which was used in Russia before 1917, + * Britain & colonies before 1752, anywhere else before 1582, + * and is still in use by some communities) leave out the + * -year/100+year/400 terms, and add 10.] + * + * This algorithm was first published by Gauss (I think). + * + * WARNING: this function will overflow on 2106-02-07 06:28:16 on + * machines were long is 32-bit! (However, as time_t is signed, we + * will already get problems at other places on 2038-01-19 03:14:08) + */ +static inline unsigned long mktime(unsigned int year, unsigned int mon, + unsigned int day, unsigned int hour, + unsigned int min, unsigned int sec) +{ + if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */ + mon += 12; /* Puts Feb last since it has leap day */ + year -= 1; + } + return ((( + (unsigned long)(year/4 - year/100 + year/400 + 367*mon/12 + day) + + year*365 - 719499 + )*24 + hour /* now have hours */ + )*60 + min /* now have minutes */ + )*60 + sec; /* finally seconds */ +} + +static unsigned long get_rtc_time(void) +{ +/* XXX not implemented yet */ + return 0; +} + +static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, 0, "timer", NULL, NULL}; + +void __init time_init(void) +{ + unsigned long __dummy; + + xtime.tv_sec = get_rtc_time(); + xtime.tv_usec = 0; + + set_ipr_data(TIMER_IRQ, TIMER_IRP_OFFSET, TIMER_PRIORITY); + setup_irq(TIMER_IRQ, &irq0); + + /* Start TMU0 */ + asm volatile("mov %1,%0\n\t" + "mov.b %0,%2 ! external clock input\n\t" + "mov %3,%0\n\t" + "mov.w %0,%4 ! enable timer0 interrupt\n\t" + "mov.l %5,%6\n\t" + "mov.l %5,%7\n\t" + "mov %8,%0\n\t" + "mov.b %0,%9" + : "=&z" (__dummy) + : "i" (TMU_TOCR_INIT), "m" (__m(TMU_TOCR)), + "i" (TMU0_TCR_INIT), "m" (__m(TMU0_TCR)), + "r" (INTERVAL), "m" (__m(TMU0_TCOR)), "m" (__m(TMU0_TCNT)), + "i" (TMU_TSTR_INIT), "m" (__m(TMU_TSTR))); +#if 0 + /* Start RTC */ + asm volatile(""); +#endif +} diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c new file mode 100644 index 000000000..3d3cba23c --- /dev/null +++ b/arch/sh/kernel/traps.c @@ -0,0 +1,127 @@ +/* + * linux/arch/sh/traps.c + * + * SuperH version: Copyright (C) 1999 Niibe Yutaka + */ + +/* + * 'Traps.c' handles hardware traps and faults after we have saved some + * state in 'entry.S'. + */ +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/spinlock.h> + +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/atomic.h> + +static inline void console_verbose(void) +{ + extern int console_loglevel; + console_loglevel = 15; +} + +#define DO_ERROR(trapnr, signr, str, name, tsk) \ +asmlinkage void do_##name(unsigned long r4, unsigned long r5, \ + unsigned long r6, unsigned long r7, \ + struct pt_regs regs) \ +{ \ + unsigned long error_code; \ + \ + asm volatile("stc r2_bank,%0": "=r" (error_code)); \ + sti(); \ + regs.syscall_nr = -1; \ + tsk->thread.error_code = error_code; \ + tsk->thread.trap_no = trapnr; \ + force_sig(signr, tsk); \ + die_if_no_fixup(str,®s,error_code); \ +} + +/* + * These constants are for searching for possible module text + * segments. VMALLOC_OFFSET comes from mm/vmalloc.c; MODULE_RANGE is + * a guess of how much space is likely to be vmalloced. + */ +#define VMALLOC_OFFSET (8*1024*1024) +#define MODULE_RANGE (8*1024*1024) + +static void show_registers(struct pt_regs *regs) +{/* Not implemented yet. */ +} + +spinlock_t die_lock; + +void die(const char * str, struct pt_regs * regs, long err) +{ + console_verbose(); + spin_lock_irq(&die_lock); + printk("%s: %04lx\n", str, err & 0xffff); + show_registers(regs); + spin_unlock_irq(&die_lock); + do_exit(SIGSEGV); +} + +static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err) +{ + if (!user_mode(regs)) + die(str, regs, err); +} + +static void die_if_no_fixup(const char * str, struct pt_regs * regs, long err) +{ + if (!user_mode(regs)) + { + unsigned long fixup; + fixup = search_exception_table(regs->pc); + if (fixup) { + regs->pc = fixup; + return; + } + die(str, regs, err); + } +} + +DO_ERROR( 7, SIGSEGV, "address error (load)", address_error_load, current) +DO_ERROR( 8, SIGSEGV, "address error (store)", address_error_store, current) +DO_ERROR(12, SIGILL, "reserved instruction", reserved_inst, current) +DO_ERROR(13, SIGILL, "illegal slot instruction", illegal_slot_inst, current) + +asmlinkage void do_exception_error (unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs regs) +{ + long ex; + asm volatile("stc r2_bank,%0" : "=r" (ex)); + die_if_kernel("exception", ®s, ex); +} + +void __init trap_init(void) +{ + extern void *vbr_base; + extern void *exception_handling_table[14]; + + exception_handling_table[7] = (void *)do_address_error_load; + exception_handling_table[8] = (void *)do_address_error_store; + exception_handling_table[12] = (void *)do_reserved_inst; + exception_handling_table[13] = (void *)do_illegal_slot_inst; + + /* NOTE: The VBR value should be at P1 + (or P2, virtural "fixed" address space). + It's definitely should not in physical address. */ + + asm volatile("ldc %0,vbr" + : /* no output */ + : "r" (&vbr_base) + : "memory"); +} diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile new file mode 100644 index 000000000..a9010ddb2 --- /dev/null +++ b/arch/sh/lib/Makefile @@ -0,0 +1,14 @@ +# +# Makefile for SuperH-specific library files.. +# + +.S.o: + $(CC) -D__ASSEMBLY__ $(AFLAGS) -traditional -c $< -o $*.o + +L_TARGET = lib.a +# L_OBJS = checksum.o old-checksum.o semaphore.o delay.o \ +# usercopy.o getuser.o putuser.o +L_OBJS = delay.o memcpy.o memset.o memmove.o csum_partial_copy.o \ + wordcopy.o checksum.o # usercopy.o getuser.o putuser.o + +include $(TOPDIR)/Rules.make diff --git a/arch/sh/lib/checksum.c b/arch/sh/lib/checksum.c new file mode 100644 index 000000000..f076bd3c6 --- /dev/null +++ b/arch/sh/lib/checksum.c @@ -0,0 +1,170 @@ +/* + * Taken from: + * arch/alpha/lib/checksum.c + * + * This file contains network checksum routines that are better done + * in an architecture-specific manner due to speed.. + */ + +#include <linux/string.h> + +#include <asm/byteorder.h> + +static inline unsigned short from64to16(unsigned long long x) +{ + /* add up 32-bit words for 33 bits */ + x = (x & 0xffffffff) + (x >> 32); + /* add up 16-bit and 17-bit words for 17+c bits */ + x = (x & 0xffff) + (x >> 16); + /* add up 16-bit and 2-bit for 16+c bit */ + x = (x & 0xffff) + (x >> 16); + /* add up carry.. */ + x = (x & 0xffff) + (x >> 16); + return x; +} + +/* + * computes the checksum of the TCP/UDP pseudo-header + * returns a 16-bit checksum, already complemented. + */ +unsigned short int csum_tcpudp_magic(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + unsigned int sum) +{ + return ~from64to16(saddr + daddr + sum + + ((unsigned long) ntohs(len) << 16) + + ((unsigned long) proto << 8)); +} + +unsigned int csum_tcpudp_nofold(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + unsigned int sum) +{ + unsigned long long result; + + result = (saddr + daddr + sum + + ((unsigned long) ntohs(len) << 16) + + ((unsigned long) proto << 8)); + + /* Fold down to 32-bits so we don't loose in the typedef-less + network stack. */ + /* 64 to 33 */ + result = (result & 0xffffffff) + (result >> 32); + /* 33 to 32 */ + result = (result & 0xffffffff) + (result >> 32); + return result; +} + +/* + * Do a 64-bit checksum on an arbitrary memory area.. + * + * This isn't a great routine, but it's not _horrible_ either. The + * inner loop could be unrolled a bit further, and there are better + * ways to do the carry, but this is reasonable. + */ +static inline unsigned long do_csum(const unsigned char * buff, int len) +{ + int odd, count; + unsigned long long result = 0; + + if (len <= 0) + goto out; + odd = 1 & (unsigned long) buff; + if (odd) { + result = *buff << 8; + len--; + buff++; + } + count = len >> 1; /* nr of 16-bit words.. */ + if (count) { + if (2 & (unsigned long) buff) { + result += *(unsigned short *) buff; + count--; + len -= 2; + buff += 2; + } + count >>= 1; /* nr of 32-bit words.. */ + if (count) { + if (4 & (unsigned long) buff) { + result += *(unsigned int *) buff; + count--; + len -= 4; + buff += 4; + } + count >>= 1; /* nr of 64-bit words.. */ + if (count) { + unsigned long carry = 0; + do { + unsigned long w = *(unsigned long *) buff; + count--; + buff += 8; + result += carry; + result += w; + carry = (w > result); + } while (count); + result += carry; + result = (result & 0xffffffff) + (result >> 32); + } + if (len & 4) { + result += *(unsigned int *) buff; + buff += 4; + } + } + if (len & 2) { + result += *(unsigned short *) buff; + buff += 2; + } + } + if (len & 1) + result += *buff; + result = from64to16(result); + if (odd) + result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); +out: + return result; +} + +/* + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksum on 4 octet boundaries. + */ +unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl) +{ + return ~do_csum(iph,ihl*4); +} + +/* + * computes the checksum of a memory block at buff, length len, + * and adds in "sum" (32-bit) + * + * returns a 32-bit number suitable for feeding into itself + * or csum_tcpudp_magic + * + * this function must be called with even lengths, except + * for the last fragment, which may be odd + * + * it's best to have buff aligned on a 32-bit boundary + */ +unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum) +{ + unsigned long long result = do_csum(buff, len); + + /* add in old sum, and carry.. */ + result += sum; + /* 32+c bits -> 32 bits */ + result = (result & 0xffffffff) + (result >> 32); + return result; +} + +/* + * this routine is used for miscellaneous IP-like checksums, mainly + * in icmp.c + */ +unsigned short ip_compute_csum(unsigned char * buff, int len) +{ + return ~from64to16(do_csum(buff,len)); +} diff --git a/arch/sh/lib/csum_partial_copy.c b/arch/sh/lib/csum_partial_copy.c new file mode 100644 index 000000000..1fb36ab05 --- /dev/null +++ b/arch/sh/lib/csum_partial_copy.c @@ -0,0 +1,75 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * MIPS specific IP/TCP/UDP checksumming routines + * + * Authors: Ralf Baechle, <ralf@waldorf-gmbh.de> + * Lots of code moved from tcp.c and ip.c; see those files + * for more names. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * $Id: csum_partial_copy.c,v 1.2 1998/09/16 13:29:32 ralf Exp $ + */ +#include <net/checksum.h> +#include <linux/types.h> +#include <asm/byteorder.h> +#include <asm/string.h> +#include <asm/uaccess.h> + +/* + * copy while checksumming, otherwise like csum_partial + */ +unsigned int csum_partial_copy(const char *src, char *dst, + int len, unsigned int sum) +{ + /* + * It's 2:30 am and I don't feel like doing it real ... + * This is lots slower than the real thing (tm) + */ + sum = csum_partial(src, len, sum); + memcpy(dst, src, len); + + return sum; +} + +/* + * Copy from userspace and compute checksum. If we catch an exception + * then zero the rest of the buffer. + */ +unsigned int csum_partial_copy_from_user (const char *src, char *dst, + int len, unsigned int sum, + int *err_ptr) +{ + int missing; + + missing = copy_from_user(dst, src, len); + if (missing) { + memset(dst + len - missing, 0, missing); + *err_ptr = -EFAULT; + } + + return csum_partial(dst, len, sum); +} + +/* + * Copy to userspace and compute checksum. + */ +unsigned int csum_partial_copy_to_user (const char *src, char *dst, + int len, unsigned int sum, + int *err_ptr) +{ + sum = csum_partial(src, len, sum); + + if (copy_to_user(dst, src, len)) { + *err_ptr = -EFAULT; + return sum; + } + + return sum; +} diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c new file mode 100644 index 000000000..cadd7367e --- /dev/null +++ b/arch/sh/lib/delay.c @@ -0,0 +1,21 @@ +/* + * Precise Delay Loops for SuperH + * + * Copyright (C) 1999 Niibe Yutaka + */ + +#include <linux/sched.h> +#include <linux/delay.h> + +inline void __const_udelay(unsigned long xloops) +{ + xloops *= current_cpu_data.loops_per_sec; + __delay(xloops); +} + +#if 0 +void __udelay(unsigned long usecs) +{ + __const_udelay(usecs * 0x000010c6); /* 2**32 / 1000000 */ +} +#endif diff --git a/arch/sh/lib/memcpy.S b/arch/sh/lib/memcpy.S new file mode 100644 index 000000000..3a4aca919 --- /dev/null +++ b/arch/sh/lib/memcpy.S @@ -0,0 +1,131 @@ +! Taken from newlib-1.8.0 + +! +! Fast SH memcpy +! +! by Toshiyasu Morita (tm@netcom.com) +! hacked by J"orn Rernnecke (amylaar@cygnus.co.uk) ("o for o-umlaut) +! +! Entry: r4: destination pointer +! r5: source pointer +! r6: byte count +! +! Exit: r0: destination pointer +! r1-r7: trashed +! +! Notes: Usually one wants to do small reads and write a longword, but +! unfortunately it is difficult in some cases to concatanate bytes +! into a longword on the SH, so this does a longword read and small +! writes. +! +! This implementation makes two assumptions about how it is called: +! +! 1.: If the byte count is nonzero, the address of the last byte to be +! copied is unsigned greater than the address of the first byte to +! be copied. This could be easily swapped for a signed comparison, +! but the algorithm used needs some comparison. +! +! 2.: When there are two or three bytes in the last word of an 11-or-bore +! bytes memory chunk to b copied, the rest of the word can be read +! without size effects. +! This could be easily changed by increasing the minumum size of +! a fast memcpy and the amount subtracted from r7 before L_2l_loop be 2, +! however, this would cost a few extra cyles on average. +! + +#include <linux/linkage.h> +ENTRY(memcpy) + ! Big endian version copies with decreasing addresses. + mov r4,r0 + add r6,r0 + sub r4,r5 + mov #11,r1 + cmp/hs r1,r6 + bf/s L_small + add #-1,r5 + mov r5,r3 + add r0,r3 + shlr r3 + bt/s L_even + mov r4,r7 + mov.b @(r0,r5),r2 + add #-1,r3 + mov.b r2,@-r0 +L_even: + tst #1,r0 + add #-1,r5 + bf/s L_odddst + add #8,r7 + tst #2,r0 + bt L_al4dst + add #-1,r3 + mov.w @(r0,r5),r1 + mov.w r1,@-r0 +L_al4dst: + shlr r3 + bt L_al4both + mov.w @(r0,r5),r1 + swap.w r1,r1 + add #4,r7 + add #-4,r5 + .align 2 +L_2l_loop: + mov.l @(r0,r5),r2 + xtrct r2,r1 + mov.l r1,@-r0 + cmp/hs r7,r0 + mov.l @(r0,r5),r1 + xtrct r1,r2 + mov.l r2,@-r0 + bt L_2l_loop + bra L_cleanup + add #5,r5 + + nop ! avoid nop in executed code. +L_al4both: + add #-2,r5 + .align 2 +L_al4both_loop: + mov.l @(r0,r5),r1 + cmp/hs r7,r0 + bt/s L_al4both_loop + mov.l r1,@-r0 + bra L_cleanup + add #3,r5 + + nop ! avoid nop in executed code. +L_odddst: + shlr r3 + bt L_al4src + mov.w @(r0,r5),r1 + mov.b r1,@-r0 + shlr8 r1 + mov.b r1,@-r0 +L_al4src: + add #-2,r5 + .align 2 +L_odd_loop: + mov.l @(r0,r5),r2 + cmp/hs r7,r0 + mov.b r2,@-r0 + shlr8 r2 + mov.w r2,@-r0 + shlr16 r2 + mov.b r2,@-r0 + bt L_odd_loop + + add #3,r5 +L_cleanup: +L_small: + cmp/eq r4,r0 + bt L_ready + add #1,r4 + .align 2 +L_cleanup_loop: + mov.b @(r0,r5),r2 + cmp/eq r4,r0 + mov.b r2,@-r0 + bf L_cleanup_loop +L_ready: + rts + nop diff --git a/arch/sh/lib/memmove.S b/arch/sh/lib/memmove.S new file mode 100644 index 000000000..e95dc3709 --- /dev/null +++ b/arch/sh/lib/memmove.S @@ -0,0 +1,422 @@ +#include <linux/linkage.h> +ENTRY(memmove) + mov.l r8,@-r15 + mov.l r9,@-r15 + mov.l r14,@-r15 + sts.l pr,@-r15 + add #-28,r15 + mov r15,r14 + mov.l r4,@r14 + mov.l r5,@(4,r14) + mov.l r6,@(8,r14) + mov.l @r14,r1 + mov.l r1,@(12,r14) + mov.l @(4,r14),r1 + mov.l r1,@(16,r14) + mov.l @(12,r14),r1 + mov.l @(16,r14),r2 + sub r2,r1 + mov.l @(8,r14),r2 + cmp/hs r2,r1 + bt .L54 + bra .L2 + nop +.L54: + mov.l @(8,r14),r1 + mov #15,r2 + cmp/gt r2,r1 + bt .LF100 + bra .L52 + nop +.LF100: + mov.l @(12,r14),r2 + neg r2,r1 + mov #3,r2 + and r1,r2 + mov.l @(8,r14),r1 + mov r1,r9 + sub r2,r9 + mov r9,r2 + mov.l r2,@(8,r14) +.L4: + mov.l @(12,r14),r2 + neg r2,r1 + mov #3,r2 + and r1,r2 + mov.l r2,@(20,r14) +.L7: + mov.l @(20,r14),r1 + cmp/pl r1 + bt .L9 + bra .L6 + nop + .align 2 +.L9: + mov r14,r2 + mov r14,r1 + add #24,r1 + mov.l @(16,r14),r2 + mov.b @r2,r3 + mov.b r3,@r1 + mov.l @(16,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(16,r14) + mov.l @(20,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(20,r14) + mov.l @(12,r14),r1 + mov r14,r2 + mov r14,r3 + add #24,r3 + mov.b @r3,r2 + mov.b r2,@r1 + mov.l @(12,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(12,r14) + bra .L7 + nop + .align 2 +.L8: +.L6: + bra .L5 + nop + .align 2 +.L10: + bra .L4 + nop + .align 2 +.L5: + nop +.L11: + mov.l @(16,r14),r1 + mov #3,r2 + and r1,r2 + tst r2,r2 + bf .L14 + mov r15,r2 + mov.l @(12,r14),r1 + mov.l @(16,r14),r2 + mov.l @(8,r14),r7 + mov r7,r3 + shlr2 r3 + mov r1,r4 + mov r2,r5 + mov r3,r6 + mov.l .L46,r8 + jsr @r8 + nop + bra .L15 + nop + .align 2 +.L14: + mov r15,r2 + mov.l @(12,r14),r1 + mov.l @(16,r14),r2 + mov.l @(8,r14),r7 + mov r7,r3 + shlr2 r3 + mov r1,r4 + mov r2,r5 + mov r3,r6 + mov.l .L47,r8 + jsr @r8 + nop +.L15: + mov.l @(8,r14),r1 + mov #-4,r2 + and r2,r1 + mov.l @(16,r14),r2 + add r2,r1 + mov.l r1,@(16,r14) + mov.l @(8,r14),r1 + mov #-4,r2 + and r2,r1 + mov.l @(12,r14),r2 + add r2,r1 + mov.l r1,@(12,r14) + mov.l @(8,r14),r1 + mov #3,r2 + and r1,r2 + mov.l r2,@(8,r14) +.L13: +.L52: + bra .L3 + nop + .align 2 +.L16: + bra .L11 + nop + .align 2 +.L12: +.L3: + nop +.L17: + mov.l @(8,r14),r1 + mov.l r1,@(20,r14) +.L20: + mov.l @(20,r14),r1 + cmp/pl r1 + bt .L22 + bra .L19 + nop + .align 2 +.L22: + mov r14,r2 + mov r14,r1 + add #24,r1 + mov.l @(16,r14),r2 + mov.b @r2,r3 + mov.b r3,@r1 + mov.l @(16,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(16,r14) + mov.l @(20,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(20,r14) + mov.l @(12,r14),r1 + mov r14,r2 + mov r14,r3 + add #24,r3 + mov.b @r3,r2 + mov.b r2,@r1 + mov.l @(12,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(12,r14) + bra .L20 + nop + .align 2 +.L21: +.L19: + bra .L18 + nop + .align 2 +.L23: + bra .L17 + nop + .align 2 +.L18: + bra .L24 + nop + .align 2 +.L2: + mov.l @(16,r14),r1 + mov.l @(8,r14),r2 + add r2,r1 + mov.l r1,@(16,r14) + mov.l @(12,r14),r1 + mov.l @(8,r14),r2 + add r2,r1 + mov.l r1,@(12,r14) + mov.l @(8,r14),r1 + mov #15,r2 + cmp/gt r2,r1 + bt .LF101 + bra .L53 + nop +.LF101: + mov.l @(12,r14),r1 + mov #3,r2 + and r1,r2 + mov.l @(8,r14),r1 + mov r1,r9 + sub r2,r9 + mov r9,r2 + mov.l r2,@(8,r14) +.L26: + mov.l @(12,r14),r1 + mov #3,r2 + and r1,r2 + mov.l r2,@(20,r14) +.L29: + mov.l @(20,r14),r1 + cmp/pl r1 + bt .L31 + bra .L28 + nop + .align 2 +.L31: + mov.l @(16,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(16,r14) + mov r14,r2 + mov r14,r1 + add #24,r1 + mov.l @(16,r14),r2 + mov.b @r2,r3 + mov.b r3,@r1 + mov.l @(12,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(12,r14) + mov.l @(20,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(20,r14) + mov.l @(12,r14),r1 + mov r14,r2 + mov r14,r3 + add #24,r3 + mov.b @r3,r2 + mov.b r2,@r1 + bra .L29 + nop + .align 2 +.L30: +.L28: + bra .L27 + nop + .align 2 +.L32: + bra .L26 + nop + .align 2 +.L27: + nop +.L33: + mov.l @(16,r14),r1 + mov #3,r2 + and r1,r2 + tst r2,r2 + bf .L36 + mov r15,r2 + mov.l @(12,r14),r1 + mov.l @(16,r14),r2 + mov.l @(8,r14),r7 + mov r7,r3 + shlr2 r3 + mov r1,r4 + mov r2,r5 + mov r3,r6 + mov.l .L48,r8 + jsr @r8 + nop + bra .L37 + nop + .align 2 +.L36: + mov r15,r2 + mov.l @(12,r14),r1 + mov.l @(16,r14),r2 + mov.l @(8,r14),r7 + mov r7,r3 + shlr2 r3 + mov r1,r4 + mov r2,r5 + mov r3,r6 + mov.l .L49,r8 + jsr @r8 + nop +.L37: + mov.l @(8,r14),r1 + mov #-4,r2 + and r2,r1 + mov.l @(16,r14),r2 + mov r2,r9 + sub r1,r9 + mov r9,r1 + mov.l r1,@(16,r14) + mov.l @(8,r14),r1 + mov #-4,r2 + and r2,r1 + mov.l @(12,r14),r2 + mov r2,r9 + sub r1,r9 + mov r9,r1 + mov.l r1,@(12,r14) + mov.l @(8,r14),r1 + mov #3,r2 + and r1,r2 + mov.l r2,@(8,r14) +.L35: +.L53: + bra .L25 + nop + .align 2 +.L38: + bra .L33 + nop + .align 2 +.L34: +.L25: + nop +.L39: + mov.l @(8,r14),r1 + mov.l r1,@(20,r14) +.L42: + mov.l @(20,r14),r1 + cmp/pl r1 + bt .L44 + bra .L41 + nop + .align 2 +.L44: + mov.l @(16,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(16,r14) + mov r14,r2 + mov r14,r1 + add #24,r1 + mov.l @(16,r14),r2 + mov.b @r2,r3 + mov.b r3,@r1 + mov.l @(12,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(12,r14) + mov.l @(20,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(20,r14) + mov.l @(12,r14),r1 + mov r14,r2 + mov r14,r3 + add #24,r3 + mov.b @r3,r2 + mov.b r2,@r1 + bra .L42 + nop + .align 2 +.L43: +.L41: + bra .L24 + nop + .align 2 +.L45: + bra .L39 + nop + .align 2 +.L40: +.L24: + mov.l @r14,r1 + mov r1,r0 + bra .L1 + nop + .align 2 +.L1: + add #28,r14 + mov r14,r15 + lds.l @r15+,pr + mov.l @r15+,r14 + mov.l @r15+,r9 + mov.l @r15+,r8 + rts + nop +.L50: + .align 2 +.L46: + .long __wordcopy_fwd_aligned +.L47: + .long __wordcopy_fwd_dest_aligned +.L48: + .long __wordcopy_bwd_aligned +.L49: + .long __wordcopy_bwd_dest_aligned +.Lfe1: diff --git a/arch/sh/lib/memset.S b/arch/sh/lib/memset.S new file mode 100644 index 000000000..c97648a4a --- /dev/null +++ b/arch/sh/lib/memset.S @@ -0,0 +1,72 @@ +! Taken from newlib-1.8.0 + +! +! Fast SH memset +! +! by Toshiyasu Morita (tm@netcom.com) +! +! Entry: r4: destination pointer +! r5: fill value +! r6: byte count +! +! Exit: r0-r3: trashed +! +#include <linux/linkage.h> + +ENTRY(memset) + mov r4,r3 ! Save return value + + mov r6,r0 ! Check explicitly for zero + cmp/eq #0,r0 + bt L_exit + + mov #12,r0 ! Check for small number of bytes + cmp/gt r6,r0 + bt L_store_byte_loop + + neg r4,r0 ! Align destination + add #4,r0 + and #3,r0 + tst r0,r0 + bt L_dup_bytes + .balignw 4,0x0009 +L_align_loop: + mov.b r5,@r4 + add #-1,r6 + add #1,r4 + dt r0 + bf L_align_loop + +L_dup_bytes: + extu.b r5,r5 ! Duplicate bytes across longword + swap.b r5,r0 + or r0,r5 + swap.w r5,r0 + or r0,r5 + + mov r6,r2 ! Calculate number of double longwords + shlr2 r2 + shlr r2 + + .balignw 4,0x0009 +L_store_long_loop: + mov.l r5,@r4 ! Store double longs to memory + dt r2 + mov.l r5,@(4,r4) + add #8,r4 + bf L_store_long_loop + + mov #7,r0 + and r0,r6 + tst r6,r6 + bt L_exit + .balignw 4,0x0009 +L_store_byte_loop: + mov.b r5,@r4 ! Store bytes to memory + add #1,r4 + dt r6 + bf L_store_byte_loop + +L_exit: + rts + mov r3,r0 diff --git a/arch/sh/lib/old-checksum.c b/arch/sh/lib/old-checksum.c new file mode 100644 index 000000000..ae3a38043 --- /dev/null +++ b/arch/sh/lib/old-checksum.c @@ -0,0 +1,19 @@ +/* + * FIXME: old compatibility stuff, will be removed soon. + */ + +#include <net/checksum.h> + +unsigned int csum_partial_copy( const char *src, char *dst, int len, int sum) +{ + int src_err=0, dst_err=0; + + sum = csum_partial_copy_generic ( src, dst, len, sum, &src_err, &dst_err); + + if (src_err || dst_err) + printk("old csum_partial_copy_fromuser(), tell mingo to convert me.\n"); + + return sum; +} + + diff --git a/arch/sh/lib/wordcopy.S b/arch/sh/lib/wordcopy.S new file mode 100644 index 000000000..c116623d0 --- /dev/null +++ b/arch/sh/lib/wordcopy.S @@ -0,0 +1,1289 @@ +#include <linux/linkage.h> +ENTRY(_wordcopy_fwd_aligned) + mov.l r14,@-r15 + add #-20,r15 + mov r15,r14 + mov.l r4,@r14 + mov.l r5,@(4,r14) + mov.l r6,@(8,r14) + mov.l @(8,r14),r2 + mov #7,r1 + and r2,r1 + mov #0,r2 + mov #7,r3 + sub r2,r1 + cmp/hi r3,r1 + bf .L29 + bra .L2 + nop +.L29: + mova .L22,r0 + add r1,r1 + mov.w @(r0,r1),r1 + add r0,r1 + jmp @r1 + nop + .align 2 + .align 2 +.L22: + .word .L15-.L22 + .word .L18-.L22 + .word .L3-.L22 + .word .L5-.L22 + .word .L7-.L22 + .word .L9-.L22 + .word .L11-.L22 + .word .L13-.L22 + .align 2 +.L3: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-24,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-28,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #6,r2 + mov.l r2,@(8,r14) + bra .L4 + nop + .align 2 +.L5: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-20,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-24,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #5,r2 + mov.l r2,@(8,r14) + bra .L6 + nop + .align 2 +.L7: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-20,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #4,r2 + mov.l r2,@(8,r14) + bra .L8 + nop + .align 2 +.L9: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #3,r2 + mov.l r2,@(8,r14) + bra .L10 + nop + .align 2 +.L11: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #2,r2 + mov.l r2,@(8,r14) + bra .L12 + nop + .align 2 +.L13: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(8,r14) + bra .L14 + nop + .align 2 +.L15: + bra .L16 + nop + bra .L1 + nop + .align 2 +.L16: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@r14 + bra .L17 + nop + .align 2 +.L18: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #4,r2 + mov.l r2,@(4,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(8,r14) + bra .L19 + nop + bra .L20 + nop + .align 2 +.L19: + bra .L21 + nop + .align 2 +.L23: +.L2: + nop +.L24: +.L21: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L17: + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #4,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 +.L14: + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #8,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L12: + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #12,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 +.L10: + mov.l @(4,r14),r2 + mov r2,r1 + add #16,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #16,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L8: + mov.l @(4,r14),r2 + mov r2,r1 + add #20,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #20,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 +.L6: + mov.l @(4,r14),r2 + mov r2,r1 + add #24,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #24,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L4: + mov.l @(4,r14),r2 + mov r2,r1 + add #28,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #28,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 + mov.l @(4,r14),r1 + mov r1,r2 + add #32,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #32,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@(8,r14) +.L26: + mov.l @(8,r14),r1 + tst r1,r1 + bf .L27 + bra .L25 + nop + .align 2 +.L27: + bra .L21 + nop + .align 2 +.L25: + nop +.L20: + mov.l @r14,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L1: + add #20,r14 + mov r14,r15 + mov.l @r15+,r14 + rts + nop +.Lfe1: + .size __wordcopy_fwd_aligned,.Lfe1-__wordcopy_fwd_aligned + .global ___lshrsi3 + .global ___ashlsi3 + .align 2 + .global __wordcopy_fwd_dest_aligned + .type __wordcopy_fwd_dest_aligned,@function +__wordcopy_fwd_dest_aligned: + mov.l r8,@-r15 + mov.l r9,@-r15 + mov.l r14,@-r15 + sts.l pr,@-r15 + add #-40,r15 + mov r15,r14 + mov.l r4,@r14 + mov.l r5,@(4,r14) + mov.l r6,@(8,r14) + mov.l @(4,r14),r1 + mov #3,r2 + and r1,r2 + mov r2,r1 + mov r1,r2 + shll2 r2 + add r2,r2 + mov.l r2,@(28,r14) + mov.l @(28,r14),r2 + neg r2,r1 + add #32,r1 + mov.l r1,@(32,r14) + mov.l @(4,r14),r1 + mov #-4,r2 + and r2,r1 + mov.l r1,@(4,r14) + mov.l @(8,r14),r2 + mov #3,r1 + and r2,r1 + mov #0,r2 + mov #3,r3 + sub r2,r1 + cmp/hi r3,r1 + bf .L53 + bra .L31 + nop +.L53: + mova .L43,r0 + add r1,r1 + mov.w @(r0,r1),r1 + add r0,r1 + jmp @r1 + nop + .align 2 + .align 2 +.L43: + .word .L36-.L43 + .word .L39-.L43 + .word .L32-.L43 + .word .L34-.L43 + .align 2 +.L32: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(20,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #2,r2 + mov.l r2,@(8,r14) + bra .L33 + nop + .align 2 +.L34: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(8,r14) + bra .L35 + nop + .align 2 +.L36: + bra .L37 + nop + bra .L30 + nop + .align 2 +.L37: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(24,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #4,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@r14 + bra .L38 + nop + .align 2 +.L39: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(20,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(24,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #8,r2 + mov.l r2,@(4,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(8,r14) + bra .L40 + nop + bra .L41 + nop + .align 2 +.L40: + bra .L42 + nop + .align 2 +.L44: +.L31: + nop +.L45: +.L42: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r8 + mov.l .L49,r1 + mov.l @(20,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L50,r1 + mov.l @(24,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L38: + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r1 + mov r1,r8 + add #4,r8 + mov.l .L49,r1 + mov.l @(24,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L50,r1 + mov.l @(12,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L35: + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(20,r14) + mov.l @r14,r1 + mov r1,r8 + add #8,r8 + mov.l .L49,r1 + mov.l @(12,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L50,r1 + mov.l @(16,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L33: + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(24,r14) + mov.l @r14,r1 + mov r1,r8 + add #12,r8 + mov.l .L49,r1 + mov.l @(16,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L50,r1 + mov.l @(20,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 + mov.l @(4,r14),r1 + mov r1,r2 + add #16,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #16,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@(8,r14) +.L47: + mov.l @(8,r14),r1 + tst r1,r1 + bf .L48 + bra .L46 + nop + .align 2 +.L48: + bra .L42 + nop + .align 2 +.L46: + nop +.L41: + mov.l @r14,r8 + mov.l .L49,r1 + mov.l @(20,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L50,r1 + mov.l @(24,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L30: + add #40,r14 + mov r14,r15 + lds.l @r15+,pr + mov.l @r15+,r14 + mov.l @r15+,r9 + mov.l @r15+,r8 + rts + nop +.L51: + .align 2 +.L49: + .long ___lshrsi3 +.L50: + .long ___ashlsi3 +.Lfe2: + .size __wordcopy_fwd_dest_aligned,.Lfe2-__wordcopy_fwd_dest_aligned + .align 2 + .global __wordcopy_bwd_aligned + .type __wordcopy_bwd_aligned,@function +__wordcopy_bwd_aligned: + mov.l r14,@-r15 + add #-20,r15 + mov r15,r14 + mov.l r4,@r14 + mov.l r5,@(4,r14) + mov.l r6,@(8,r14) + mov.l @(8,r14),r2 + mov #7,r1 + and r2,r1 + mov #0,r2 + mov #7,r3 + sub r2,r1 + cmp/hi r3,r1 + bf .L82 + bra .L55 + nop +.L82: + mova .L75,r0 + add r1,r1 + mov.w @(r0,r1),r1 + add r0,r1 + jmp @r1 + nop + .align 2 + .align 2 +.L75: + .word .L68-.L75 + .word .L71-.L75 + .word .L56-.L75 + .word .L58-.L75 + .word .L60-.L75 + .word .L62-.L75 + .word .L64-.L75 + .word .L66-.L75 + .align 2 +.L56: + mov.l @(4,r14),r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #6,r2 + mov.l r2,@(8,r14) + bra .L57 + nop + .align 2 +.L58: + mov.l @(4,r14),r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #5,r2 + mov.l r2,@(8,r14) + bra .L59 + nop + .align 2 +.L60: + mov.l @(4,r14),r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #4,r2 + mov.l r2,@(8,r14) + bra .L61 + nop + .align 2 +.L62: + mov.l @(4,r14),r1 + mov r1,r2 + add #-20,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #16,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #3,r2 + mov.l r2,@(8,r14) + bra .L63 + nop + .align 2 +.L64: + mov.l @(4,r14),r1 + mov r1,r2 + add #-24,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-20,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #20,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #2,r2 + mov.l r2,@(8,r14) + bra .L65 + nop + .align 2 +.L66: + mov.l @(4,r14),r1 + mov r1,r2 + add #-28,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-24,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #24,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(8,r14) + bra .L67 + nop + .align 2 +.L68: + bra .L69 + nop + bra .L54 + nop + .align 2 +.L69: + mov.l @(4,r14),r1 + mov r1,r2 + add #-32,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-28,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #28,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + bra .L70 + nop + .align 2 +.L71: + mov.l @(4,r14),r1 + mov r1,r2 + add #-36,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-32,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #32,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(8,r14) + bra .L72 + nop + bra .L73 + nop + .align 2 +.L72: + bra .L74 + nop + .align 2 +.L76: +.L55: + nop +.L77: +.L74: + mov.l @(4,r14),r2 + mov r2,r1 + add #28,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #28,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L70: + mov.l @(4,r14),r2 + mov r2,r1 + add #24,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #24,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 +.L67: + mov.l @(4,r14),r2 + mov r2,r1 + add #20,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #20,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L65: + mov.l @(4,r14),r2 + mov r2,r1 + add #16,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #16,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 +.L63: + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #12,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L61: + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r2 + mov r2,r1 + add #8,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 +.L59: + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r2 + mov r2,r1 + add #4,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L57: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r1 + mov.l @(12,r14),r2 + mov.l r2,@r1 + mov.l @(4,r14),r1 + mov r1,r2 + add #-32,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-32,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@(8,r14) +.L79: + mov.l @(8,r14),r1 + tst r1,r1 + bf .L80 + bra .L78 + nop + .align 2 +.L80: + bra .L74 + nop + .align 2 +.L78: + nop +.L73: + mov.l @r14,r2 + mov r2,r1 + add #28,r1 + mov.l @(16,r14),r2 + mov.l r2,@r1 +.L54: + add #20,r14 + mov r14,r15 + mov.l @r15+,r14 + rts + nop +.Lfe3: + .size __wordcopy_bwd_aligned,.Lfe3-__wordcopy_bwd_aligned + .align 2 + .global __wordcopy_bwd_dest_aligned + .type __wordcopy_bwd_dest_aligned,@function +__wordcopy_bwd_dest_aligned: + mov.l r8,@-r15 + mov.l r9,@-r15 + mov.l r14,@-r15 + sts.l pr,@-r15 + add #-40,r15 + mov r15,r14 + mov.l r4,@r14 + mov.l r5,@(4,r14) + mov.l r6,@(8,r14) + mov.l @(4,r14),r1 + mov #3,r2 + and r1,r2 + mov r2,r1 + mov r1,r2 + shll2 r2 + add r2,r2 + mov.l r2,@(28,r14) + mov.l @(28,r14),r2 + neg r2,r1 + add #32,r1 + mov.l r1,@(32,r14) + mov.l @(4,r14),r1 + mov #-4,r2 + and r2,r1 + mov.l r1,@(4,r14) + mov.l @(4,r14),r1 + mov r1,r2 + add #4,r2 + mov.l r2,@(4,r14) + mov.l @(8,r14),r2 + mov #3,r1 + and r2,r1 + mov #0,r2 + mov #3,r3 + sub r2,r1 + cmp/hi r3,r1 + bf .L106 + bra .L84 + nop +.L106: + mova .L96,r0 + add r1,r1 + mov.w @(r0,r1),r1 + add r0,r1 + jmp @r1 + nop + .align 2 + .align 2 +.L96: + .word .L89-.L96 + .word .L92-.L96 + .word .L85-.L96 + .word .L87-.L96 + .align 2 +.L85: + mov.l @(4,r14),r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(20,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #2,r2 + mov.l r2,@(8,r14) + bra .L86 + nop + .align 2 +.L87: + mov.l @(4,r14),r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-8,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(24,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(20,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #1,r2 + mov.l r2,@(8,r14) + bra .L88 + nop + .align 2 +.L89: + bra .L90 + nop + bra .L83 + nop + .align 2 +.L90: + mov.l @(4,r14),r1 + mov r1,r2 + add #-20,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-12,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #16,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(24,r14) + bra .L91 + nop + .align 2 +.L92: + mov.l @(4,r14),r1 + mov r1,r2 + add #-24,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@r14 + mov.l @(4,r14),r2 + mov r2,r1 + add #20,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @(4,r14),r2 + mov r2,r1 + add #16,r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @(8,r14),r1 + mov r1,r2 + add #-1,r2 + mov.l r2,@(8,r14) + bra .L93 + nop + bra .L94 + nop + .align 2 +.L93: + bra .L95 + nop + .align 2 +.L97: +.L84: + nop +.L98: +.L95: + mov.l @(4,r14),r2 + mov r2,r1 + add #12,r1 + mov.l @r1,r2 + mov.l r2,@(24,r14) + mov.l @r14,r1 + mov r1,r8 + add #12,r8 + mov.l .L102,r1 + mov.l @(12,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L103,r1 + mov.l @(16,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L91: + mov.l @(4,r14),r2 + mov r2,r1 + add #8,r1 + mov.l @r1,r2 + mov.l r2,@(20,r14) + mov.l @r14,r1 + mov r1,r8 + add #8,r8 + mov.l .L102,r1 + mov.l @(24,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L103,r1 + mov.l @(12,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L88: + mov.l @(4,r14),r2 + mov r2,r1 + add #4,r1 + mov.l @r1,r2 + mov.l r2,@(16,r14) + mov.l @r14,r1 + mov r1,r8 + add #4,r8 + mov.l .L102,r1 + mov.l @(20,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L103,r1 + mov.l @(24,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L86: + mov.l @(4,r14),r1 + mov.l @r1,r2 + mov.l r2,@(12,r14) + mov.l @r14,r8 + mov.l .L102,r1 + mov.l @(16,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L103,r1 + mov.l @(20,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 + mov.l @(4,r14),r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@(4,r14) + mov.l @r14,r1 + mov r1,r2 + add #-16,r2 + mov.l r2,@r14 + mov.l @(8,r14),r1 + mov r1,r2 + add #-4,r2 + mov.l r2,@(8,r14) +.L100: + mov.l @(8,r14),r1 + tst r1,r1 + bf .L101 + bra .L99 + nop + .align 2 +.L101: + bra .L95 + nop + .align 2 +.L99: + nop +.L94: + mov.l @r14,r1 + mov r1,r8 + add #12,r8 + mov.l .L102,r1 + mov.l @(12,r14),r4 + mov.l @(28,r14),r5 + jsr @r1 + nop + mov r0,r9 + mov.l .L103,r1 + mov.l @(16,r14),r4 + mov.l @(32,r14),r5 + jsr @r1 + nop + mov.l r0,@(36,r14) + mov.l @(36,r14),r1 + or r9,r1 + mov.l r1,@r8 +.L83: + add #40,r14 + mov r14,r15 + lds.l @r15+,pr + mov.l @r15+,r14 + mov.l @r15+,r9 + mov.l @r15+,r8 + rts + nop +.L104: + .align 2 +.L102: + .long ___lshrsi3 +.L103: + .long ___ashlsi3 +.Lfe4: diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile new file mode 100644 index 000000000..c89c2b9e3 --- /dev/null +++ b/arch/sh/mm/Makefile @@ -0,0 +1,13 @@ +# +# Makefile for the Linux SuperH-specific parts of the memory manager. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# +# Note 2! The CFLAGS definition is now in the main makefile... + +O_TARGET := mm.o +O_OBJS := init.o fault.o ioremap.o extable.o + +include $(TOPDIR)/Rules.make diff --git a/arch/sh/mm/extable.c b/arch/sh/mm/extable.c new file mode 100644 index 000000000..35c4451eb --- /dev/null +++ b/arch/sh/mm/extable.c @@ -0,0 +1,57 @@ +/* + * linux/arch/sh/mm/extable.c + * Taken from: + * linux/arch/i386/mm/extable.c + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <asm/uaccess.h> + +extern const struct exception_table_entry __start___ex_table[]; +extern const struct exception_table_entry __stop___ex_table[]; + +static inline unsigned long +search_one_table(const struct exception_table_entry *first, + const struct exception_table_entry *last, + unsigned long value) +{ + while (first <= last) { + const struct exception_table_entry *mid; + long diff; + + mid = (last - first) / 2 + first; + diff = mid->insn - value; + if (diff == 0) + return mid->fixup; + else if (diff < 0) + first = mid+1; + else + last = mid-1; + } + return 0; +} + +unsigned long +search_exception_table(unsigned long addr) +{ + unsigned long ret; + +#ifndef CONFIG_MODULES + /* There is only the kernel to search. */ + ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr); + if (ret) return ret; +#else + /* The kernel is the last "module" -- no need to treat it special. */ + struct module *mp; + for (mp = module_list; mp != NULL; mp = mp->next) { + if (mp->ex_table_start == NULL) + continue; + ret = search_one_table(mp->ex_table_start, + mp->ex_table_end - 1, addr); + if (ret) return ret; + } +#endif + + return 0; +} diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c new file mode 100644 index 000000000..c1348d5b4 --- /dev/null +++ b/arch/sh/mm/fault.c @@ -0,0 +1,326 @@ +/* + * linux/arch/sh/mm/fault.c + * Copyright (C) 1999 Niibe Yutaka + * + * Based on linux/arch/i386/mm/fault.c: + * Copyright (C) 1995 Linus Torvalds + */ + +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/interrupt.h> + +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/hardirq.h> +#include <asm/mmu_context.h> + +extern void die(const char *,struct pt_regs *,long); + +/* + * Ugly, ugly, but the goto's result in better assembly.. + */ +int __verify_write(const void * addr, unsigned long size) +{ + struct vm_area_struct * vma; + unsigned long start = (unsigned long) addr; + + if (!size) + return 1; + + vma = find_vma(current->mm, start); + if (!vma) + goto bad_area; + if (vma->vm_start > start) + goto check_stack; + +good_area: + if (!(vma->vm_flags & VM_WRITE)) + goto bad_area; + size--; + size += start & ~PAGE_MASK; + size >>= PAGE_SHIFT; + start &= PAGE_MASK; + + for (;;) { + if (handle_mm_fault(current, vma, start, 1) <= 0) + goto bad_area; + if (!size) + break; + size--; + start += PAGE_SIZE; + if (start < vma->vm_end) + continue; + vma = vma->vm_next; + if (!vma || vma->vm_start != start) + goto bad_area; + if (!(vma->vm_flags & VM_WRITE)) + goto bad_area;; + } + return 1; + +check_stack: + if (!(vma->vm_flags & VM_GROWSDOWN)) + goto bad_area; + if (expand_stack(vma, start) == 0) + goto good_area; + +bad_area: + return 0; +} + +/* + * This routine handles page faults. It determines the address, + * and the problem, and then passes it off to one of the appropriate + * routines. + */ +asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess, + unsigned long address) +{ + struct task_struct *tsk; + struct mm_struct *mm; + struct vm_area_struct * vma; + unsigned long page; + unsigned long fixup; + + tsk = current; + mm = tsk->mm; + + /* + * If we're in an interrupt or have no user + * context, we must not take the fault.. + */ + if (in_interrupt() || !mm) + goto no_context; + + down(&mm->mmap_sem); + + vma = find_vma(mm, address); + if (!vma) + goto bad_area; + if (vma->vm_start <= address) + goto good_area; + if (!(vma->vm_flags & VM_GROWSDOWN)) + goto bad_area; + if (expand_stack(vma, address)) + goto bad_area; +/* + * Ok, we have a good vm_area for this memory access, so + * we can handle it.. + */ +good_area: + if (writeaccess) { + if (!(vma->vm_flags & VM_WRITE)) + goto bad_area; + } else { + if (!(vma->vm_flags & (VM_READ | VM_EXEC))) + goto bad_area; + } + + /* + * If for any reason at all we couldn't handle the fault, + * make sure we exit gracefully rather than endlessly redo + * the fault. + */ + { + int fault = handle_mm_fault(tsk, vma, address, writeaccess); + if (fault < 0) + goto out_of_memory; + if (!fault) + goto do_sigbus; + } + + up(&mm->mmap_sem); + return; + +/* + * Something tried to access memory that isn't in our memory map.. + * Fix it, but check if it's kernel or user first.. + */ +bad_area: + up(&mm->mmap_sem); + + if (user_mode(regs)) { + tsk->thread.address = address; + tsk->thread.error_code = writeaccess; + force_sig(SIGSEGV, tsk); + return; + } + +no_context: + /* Are we prepared to handle this kernel fault? */ + fixup = search_exception_table(regs->pc); + if (fixup != 0) { + regs->pc = fixup; + return; + } + +/* + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. + * + */ + if (address < PAGE_SIZE) + printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); + else + printk(KERN_ALERT "Unable to handle kernel paging request"); + printk(" at virtual address %08lx\n",address); + printk(KERN_ALERT "pc = %08lx\n", regs->pc); + page = (unsigned long)mm->pgd; + page = ((unsigned long *) __va(page))[address >> 22]; + printk(KERN_ALERT "*pde = %08lx\n", page); + if (page & 1) { + page &= PAGE_MASK; + address &= 0x003ff000; + page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT]; + printk(KERN_ALERT "*pte = %08lx\n", page); + } + die("Oops", regs, writeaccess); + do_exit(SIGKILL); + +/* + * We ran out of memory, or some other thing happened to us that made + * us unable to handle the page fault gracefully. + */ +out_of_memory: + up(&mm->mmap_sem); + printk("VM: killing process %s\n", tsk->comm); + if (user_mode(regs)) + do_exit(SIGKILL); + goto no_context; + +do_sigbus: + up(&mm->mmap_sem); + + /* + * Send a sigbus, regardless of whether we were in kernel + * or user mode. + */ + tsk->thread.address = address; + tsk->thread.error_code = writeaccess; + tsk->thread.trap_no = 14; + force_sig(SIGBUS, tsk); + + /* Kernel mode? Handle exceptions or die */ + if (!user_mode(regs)) + goto no_context; +} + +void update_mmu_cache(struct vm_area_struct * vma, + unsigned long address, pte_t pte) +{ + unsigned long flags; + unsigned long asid; + unsigned long pteval; + + asid = get_asid(); + + save_and_cli(flags); + address &= PAGE_MASK; + /* Set PTEH register */ + asm volatile ("mov.l %0,%1" + : /* no output */ + : "r" (address | asid), "m" (__m(MMU_PTEH))); + + pteval = pte_val(pte); + pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */ + pteval |= _PAGE_FLAGS_HARDWARE_DEFAULT; /* add default flags */ + /* Set PTEL register */ + asm volatile ("mov.l %0,%1" + : /* no output */ + : "r" (pteval), "m" (__m(MMU_PTEL))); + + /* Load the TLB */ + asm volatile ("ldtlb" : /* no output */ : /* no input */ + : "memory"); + restore_flags(flags); +} + +static __inline__ void __flush_tlb_page(unsigned long asid, unsigned long page) +{ + unsigned long addr, data; + + addr = MMU_TLB_ADDRESS_ARRAY | (page & 0x1F000) | MMU_PAGE_ASSOC_BIT; + data = page | asid; /* VALID bit is off */ + __asm__ __volatile__ ("mov.l %0,%1" + : /* no output */ + : "r" (data), "m" (__m(addr))); +} + +void flush_tlb_page(struct vm_area_struct *vma, unsigned long page) +{ + unsigned long asid; + + if (vma->vm_mm->context != NO_CONTEXT) { + page &= PAGE_MASK; + asid = vma->vm_mm->context & MMU_CONTEXT_ASID_MASK; + __flush_tlb_page (asid, page); + } +} + +void flush_tlb_range(struct mm_struct *mm, unsigned long start, + unsigned long end) +{ + if (mm->context != NO_CONTEXT) { + unsigned long flags; + int size; + + save_and_cli(flags); + size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT; + if (size > (MMU_NTLB_ENTRIES/4)) { /* So many TLB to flush */ + get_new_mmu_context(mm); + if (mm == current->mm) + set_asid(mm->context & MMU_CONTEXT_ASID_MASK); + } else { + unsigned long asid; + + asid = mm->context & MMU_CONTEXT_ASID_MASK; + start &= PAGE_MASK; + end += (PAGE_SIZE - 1); + end &= PAGE_MASK; + while (start < end) { + __flush_tlb_page (asid, start); + start += PAGE_SIZE; + } + } + restore_flags(flags); + } +} + +void flush_tlb_mm(struct mm_struct *mm) +{ + /* Invalidate all TLB of this process. */ + /* Instead of flush TLBs, we get new MMU context. */ + if (mm->context != NO_CONTEXT) { + unsigned long flags; + + save_and_cli(flags); + get_new_mmu_context(mm); + if (mm == current->mm) + set_asid(mm->context & MMU_CONTEXT_ASID_MASK); + restore_flags(flags); + } +} + +void flush_tlb_all(void) +{ + unsigned long flags, __dummy; + + save_and_cli(flags); + asm volatile("mov.l %1,%0\n\t" + "or #4,%0\n\t" /* Set TF-bit to flush */ + "mov.l %0,%1" + : "=&z" (__dummy) + : "m" (__m(MMUCR))); + restore_flags(flags); +} diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c new file mode 100644 index 000000000..3a6bfc1a2 --- /dev/null +++ b/arch/sh/mm/init.c @@ -0,0 +1,294 @@ +/* + * linux/arch/sh/mm/init.c + * + * Copyright (C) 1999 Niibe Yutaka + * + * Based on linux/arch/i386/mm/init.c: + * Copyright (C) 1995 Linus Torvalds + */ + +#include <linux/config.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/swap.h> +#include <linux/smp.h> +#include <linux/init.h> +#ifdef CONFIG_BLK_DEV_INITRD +#include <linux/blk.h> +#endif + +#include <asm/processor.h> +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/mmu_context.h> + +/* + * Cache of MMU context last used. + */ +unsigned long mmu_context_cache; + +static unsigned long totalram = 0; + +extern void show_net_buffers(void); +extern unsigned long init_smp_mappings(unsigned long); + +void __bad_pte_kernel(pmd_t *pmd) +{ + printk("Bad pmd in pte_alloc: %08lx\n", pmd_val(*pmd)); + pmd_val(*pmd) = _KERNPG_TABLE + __pa(BAD_PAGETABLE); +} + +void __bad_pte(pmd_t *pmd) +{ + printk("Bad pmd in pte_alloc: %08lx\n", pmd_val(*pmd)); + pmd_val(*pmd) = _PAGE_TABLE + __pa(BAD_PAGETABLE); +} + +pte_t *get_pte_kernel_slow(pmd_t *pmd, unsigned long offset) +{ + pte_t *pte; + + pte = (pte_t *) __get_free_page(GFP_KERNEL); + if (pmd_none(*pmd)) { + if (pte) { + clear_page((unsigned long)pte); + pmd_val(*pmd) = _KERNPG_TABLE + __pa(pte); + return pte + offset; + } + pmd_val(*pmd) = _KERNPG_TABLE + __pa(BAD_PAGETABLE); + return NULL; + } + free_page((unsigned long)pte); + if (pmd_bad(*pmd)) { + __bad_pte_kernel(pmd); + return NULL; + } + return (pte_t *) pmd_page(*pmd) + offset; +} + +pte_t *get_pte_slow(pmd_t *pmd, unsigned long offset) +{ + unsigned long pte; + + pte = (unsigned long) __get_free_page(GFP_KERNEL); + if (pmd_none(*pmd)) { + if (pte) { + clear_page(pte); + pmd_val(*pmd) = _PAGE_TABLE + __pa(pte); + return (pte_t *)(pte + offset); + } + pmd_val(*pmd) = _PAGE_TABLE + __pa(BAD_PAGETABLE); + return NULL; + } + free_page(pte); + if (pmd_bad(*pmd)) { + __bad_pte(pmd); + return NULL; + } + return (pte_t *) (pmd_page(*pmd) + offset); +} + +int do_check_pgt_cache(int low, int high) +{ + int freed = 0; + if(pgtable_cache_size > high) { + do { + if(pgd_quicklist) + free_pgd_slow(get_pgd_fast()), freed++; + if(pmd_quicklist) + free_pmd_slow(get_pmd_fast()), freed++; + if(pte_quicklist) + free_pte_slow(get_pte_fast()), freed++; + } while(pgtable_cache_size > low); + } + return freed; +} + +/* + * BAD_PAGE is the page that is used for page faults when linux + * is out-of-memory. Older versions of linux just did a + * do_exit(), but using this instead means there is less risk + * for a process dying in kernel mode, possibly leaving an inode + * unused etc.. + * + * BAD_PAGETABLE is the accompanying page-table: it is initialized + * to point to BAD_PAGE entries. + * + * ZERO_PAGE is a special page that is used for zero-initialized + * data and COW. + */ +pte_t * __bad_pagetable(void) +{ + extern char empty_bad_page_table[PAGE_SIZE]; + unsigned long page = (unsigned long)empty_bad_page_table; + + clear_page(page); + return (pte_t *)empty_bad_page_table; +} + +pte_t __bad_page(void) +{ + extern char empty_bad_page[PAGE_SIZE]; + unsigned long page = (unsigned long)empty_bad_page; + + clear_page(page); + return pte_mkdirty(mk_pte(page, PAGE_SHARED)); +} + +void show_mem(void) +{ + int i,free = 0,total = 0,reserved = 0; + int shared = 0, cached = 0; + + printk("Mem-info:\n"); + show_free_areas(); + printk("Free swap: %6dkB\n",nr_swap_pages<<(PAGE_SHIFT-10)); + i = max_mapnr; + while (i-- > 0) { + total++; + if (PageReserved(mem_map+i)) + reserved++; + else if (PageSwapCache(mem_map+i)) + cached++; + else if (!page_count(mem_map+i)) + free++; + else + shared += page_count(mem_map+i) - 1; + } + printk("%d pages of RAM\n",total); + printk("%d reserved pages\n",reserved); + printk("%d pages shared\n",shared); + printk("%d pages swap cached\n",cached); + printk("%ld pages in page table cache\n",pgtable_cache_size); +#ifdef CONFIG_NET + show_net_buffers(); +#endif +} + +extern unsigned long free_area_init(unsigned long, unsigned long); + +/* References to section boundaries */ + +extern char _text, _etext, _edata, __bss_start, _end; +extern char __init_begin, __init_end; + +pgd_t swapper_pg_dir[1024]; + +/* + * paging_init() sets up the page tables + * + * This routines also unmaps the page at virtual kernel address 0, so + * that we can trap those pesky NULL-reference errors in the kernel. + */ +unsigned long __init +paging_init(unsigned long start_mem, unsigned long end_mem) +{ + pgd_t * pg_dir; + + start_mem = PAGE_ALIGN(start_mem); + + /* We don't need kernel mapping as hardware support that. */ + pg_dir = swapper_pg_dir; + + /* Unmap the original low memory mappings to detect NULL reference */ + pgd_val(pg_dir[0]) = 0; + + /* Enable MMU */ + __asm__ __volatile__ ("mov.l %0,%1" + : /* no output */ + : "r" (MMU_CONTROL_INIT), "m" (__m(MMUCR))); + + return free_area_init(start_mem, end_mem); +} + +unsigned long empty_bad_page[1024]; +unsigned long empty_bad_page_table[1024]; +unsigned long empty_zero_page[1024]; + +void __init mem_init(unsigned long start_mem, unsigned long end_mem) +{ + int codepages = 0; + int reservedpages = 0; + int datapages = 0; + int initpages = 0; + unsigned long tmp; + + end_mem &= PAGE_MASK; + high_memory = (void *) end_mem; + max_mapnr = num_physpages = MAP_NR(end_mem); + + /* clear the zero-page */ + memset(empty_zero_page, 0, PAGE_SIZE); + + /* Mark (clear "reserved" bit) usable pages in the mem_map[] */ + /* Note that all are marked reserved already. */ + tmp = start_mem = PAGE_ALIGN(start_mem); + while (tmp < end_mem) { + clear_bit(PG_reserved, &mem_map[MAP_NR(tmp)].flags); + clear_bit(PG_DMA, &mem_map[MAP_NR(tmp)].flags); + tmp += PAGE_SIZE; + } + + for (tmp = PAGE_OFFSET; tmp < end_mem; tmp += PAGE_SIZE) { + if (PageReserved(mem_map+MAP_NR(tmp))) { + if (tmp >= (unsigned long) &_text && tmp < (unsigned long) &_edata) { + if (tmp < (unsigned long) &_etext) + codepages++; + else + datapages++; + } else if (tmp >= (unsigned long) &__init_begin + && tmp < (unsigned long) &__init_end) + initpages++; + else if (tmp >= (unsigned long) &__bss_start + && tmp < (unsigned long) start_mem) + datapages++; + else + reservedpages++; + continue; + } + set_page_count(mem_map+MAP_NR(tmp), 1); + totalram += PAGE_SIZE; +#ifdef CONFIG_BLK_DEV_INITRD + if (!initrd_start || (tmp < initrd_start || tmp >= initrd_end)) +#endif + free_page(tmp); + } + printk("Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init)\n", + (unsigned long) nr_free_pages << (PAGE_SHIFT-10), + max_mapnr << (PAGE_SHIFT-10), + codepages << (PAGE_SHIFT-10), + reservedpages << (PAGE_SHIFT-10), + datapages << (PAGE_SHIFT-10), + initpages << (PAGE_SHIFT-10)); +} + +void free_initmem(void) +{ + unsigned long addr; + + addr = (unsigned long)(&__init_begin); + for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { + mem_map[MAP_NR(addr)].flags &= ~(1 << PG_reserved); + set_page_count(mem_map+MAP_NR(addr), 1); + free_page(addr); + totalram += PAGE_SIZE; + } + printk ("Freeing unused kernel memory: %dk freed\n", (&__init_end - &__init_begin) >> 10); +} + +void si_meminfo(struct sysinfo *val) +{ + val->totalram = totalram; + val->sharedram = 0; + val->freeram = nr_free_pages << PAGE_SHIFT; + val->bufferram = atomic_read(&buffermem); + return; +} diff --git a/arch/sh/mm/ioremap.c b/arch/sh/mm/ioremap.c new file mode 100644 index 000000000..f786379cf --- /dev/null +++ b/arch/sh/mm/ioremap.c @@ -0,0 +1,140 @@ +/* + * arch/sh/mm/ioremap.c + * + * Re-map IO memory to kernel address space so that we can access it. + * This is needed for high PCI addresses that aren't mapped in the + * 640k-1MB IO memory area on PC's + * + * (C) Copyright 1995 1996 Linus Torvalds + */ + +#include <linux/vmalloc.h> +#include <asm/io.h> + +static inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size, + unsigned long phys_addr, unsigned long flags) +{ + unsigned long end; + + address &= ~PMD_MASK; + end = address + size; + if (end > PMD_SIZE) + end = PMD_SIZE; + do { + if (!pte_none(*pte)) + printk("remap_area_pte: page already exists\n"); + set_pte(pte, mk_pte_phys(phys_addr, __pgprot(_PAGE_PRESENT | _PAGE_RW | + _PAGE_DIRTY | _PAGE_ACCESSED | flags))); + address += PAGE_SIZE; + phys_addr += PAGE_SIZE; + pte++; + } while (address < end); +} + +static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size, + unsigned long phys_addr, unsigned long flags) +{ + unsigned long end; + + address &= ~PGDIR_MASK; + end = address + size; + if (end > PGDIR_SIZE) + end = PGDIR_SIZE; + phys_addr -= address; + do { + pte_t * pte = pte_alloc_kernel(pmd, address); + if (!pte) + return -ENOMEM; + remap_area_pte(pte, address, end - address, address + phys_addr, flags); + address = (address + PMD_SIZE) & PMD_MASK; + pmd++; + } while (address < end); + return 0; +} + +static int remap_area_pages(unsigned long address, unsigned long phys_addr, + unsigned long size, unsigned long flags) +{ + pgd_t * dir; + unsigned long end = address + size; + + phys_addr -= address; + dir = pgd_offset(&init_mm, address); + flush_cache_all(); + while (address < end) { + pmd_t *pmd = pmd_alloc_kernel(dir, address); + if (!pmd) + return -ENOMEM; + if (remap_area_pmd(pmd, address, end - address, + phys_addr + address, flags)) + return -ENOMEM; + set_pgdir(address, *dir); + address = (address + PGDIR_SIZE) & PGDIR_MASK; + dir++; + } + flush_tlb_all(); + return 0; +} + +/* + * Generic mapping function (not visible outside): + */ + +/* + * Remap an arbitrary physical address space into the kernel virtual + * address space. Needed when the kernel wants to access high addresses + * directly. + * + * NOTE! We need to allow non-page-aligned mappings too: we will obviously + * have to convert them into an offset in a page-aligned mapping, but the + * caller shouldn't need to know that small detail. + */ +void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags) +{ + void * addr; + struct vm_struct * area; + unsigned long offset, last_addr; + + /* Don't allow wraparound or zero size */ + last_addr = phys_addr + size - 1; + if (!size || last_addr < phys_addr) + return NULL; + + /* + * Don't remap the low PCI/ISA area, it's always mapped.. + */ + if (phys_addr >= 0xA0000 && last_addr <= 0x100000) + return phys_to_virt(phys_addr); + + /* + * Don't allow anybody to remap normal RAM that we're using.. + */ + if (phys_addr < virt_to_phys(high_memory)) + return NULL; + + /* + * Mappings have to be page-aligned + */ + offset = phys_addr & ~PAGE_MASK; + phys_addr &= PAGE_MASK; + size = PAGE_ALIGN(last_addr) - phys_addr; + + /* + * Ok, go for it.. + */ + area = get_vm_area(size); + if (!area) + return NULL; + addr = area->addr; + if (remap_area_pages(VMALLOC_VMADDR(addr), phys_addr, size, flags)) { + vfree(addr); + return NULL; + } + return (void *) (offset + (char *)addr); +} + +void iounmap(void *addr) +{ + if (addr > high_memory) + return vfree((void *) (PAGE_MASK & (unsigned long) addr)); +} diff --git a/arch/sh/vmlinux.lds.S b/arch/sh/vmlinux.lds.S new file mode 100644 index 000000000..a812c91f8 --- /dev/null +++ b/arch/sh/vmlinux.lds.S @@ -0,0 +1,114 @@ +/* ld script to make SuperH Linux kernel + * Written by Niibe Yutaka + */ +#include <linux/config.h> +#ifdef CONFIG_LITTLE_ENDIAN +OUTPUT_FORMAT("elf32-shl", "elf32-shl", "elf32-shl") +#else +OUTPUT_FORMAT("elf32-sh", "elf32-sh", "elf32-sh") +#endif +OUTPUT_ARCH(sh) +ENTRY(_start) +SECTIONS +{ + . = 0x80000000 + CONFIG_MEMORY_START + 0x1000; + __text = .; /* Text and read-only data */ + _text = .; /* Text and read-only data */ + .text : { + *(.text) + *(.fixup) + *(.gnu.warning) + } = 0 + .text.lock : { *(.text.lock) } /* out-of-line lock text */ + .rodata : { *(.rodata) } + .kstrtab : { *(.kstrtab) } + + . = ALIGN(16); /* Exception table */ + ___start___ex_table = .; + ___ex_table : { *(__ex_table) } + ___stop___ex_table = .; + + ___start___ksymtab = .; /* Kernel symbol table */ + ___ksymtab : { *(__ksymtab) } + ___stop___ksymtab = .; + + __etext = .; /* End of text section */ + + .data : { /* Data */ + *(.data) + CONSTRUCTORS + } + + __edata = .; /* End of data section */ + + . = ALIGN(8192); /* init_task */ + .data.init_task : { *(.data.init_task) } + /* stack */ + .stack : { _stack = .; __stack = .; } + + . = ALIGN(4096); /* Init code and data */ + ___init_begin = .; + .text.init : { *(.text.init) } + .data.init : { *(.data.init) } + . = ALIGN(16); + ___setup_start = .; + .setup.init : { *(.setup.init) } + ___setup_end = .; + ___initcall_start = .; + .initcall.init : { *(.initcall.init) } + ___initcall_end = .; + . = ALIGN(4096); + ___init_end = .; + + . = ALIGN(4096); + .data.page_aligned : { *(.data.idt) } + + . = ALIGN(32); + .data.cacheline_aligned : { *(.data.cacheline_aligned) } + + . = ALIGN(4096); + .data.disk_image : { *(.data.disk_image) } + + . = ALIGN(4); + ___bss_start = .; /* BSS */ + .bss : { + *(.bss) + } + . = ALIGN(4); + __end = . ; + + /* Stabs debugging sections. */ + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + /* DWARF debug sections. + Symbols in the DWARF debugging section are relative to the beginning + of the section so we begin .debug at 0. */ + /* DWARF 1 */ + .debug 0 : { *(.debug) } + .line 0 : { *(.line) } + /* GNU DWARF 1 extensions */ + .debug_srcinfo 0 : { *(.debug_srcinfo) } + .debug_sfnames 0 : { *(.debug_sfnames) } + /* DWARF 1.1 and DWARF 2 */ + .debug_aranges 0 : { *(.debug_aranges) } + .debug_pubnames 0 : { *(.debug_pubnames) } + /* DWARF 2 */ + .debug_info 0 : { *(.debug_info) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_line 0 : { *(.debug_line) } + .debug_frame 0 : { *(.debug_frame) } + .debug_str 0 : { *(.debug_str) } + .debug_loc 0 : { *(.debug_loc) } + .debug_macinfo 0 : { *(.debug_macinfo) } + /* SGI/MIPS DWARF 2 extensions */ + .debug_weaknames 0 : { *(.debug_weaknames) } + .debug_funcnames 0 : { *(.debug_funcnames) } + .debug_typenames 0 : { *(.debug_typenames) } + .debug_varnames 0 : { *(.debug_varnames) } + /* These must appear regardless of . */ +} |