diff options
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/Makefile | 47 | ||||
| -rw-r--r-- | arch/sparc/kernel/entry.S | 927 | ||||
| -rw-r--r-- | arch/sparc/kernel/head.S | 1045 | ||||
| -rw-r--r-- | arch/sparc/kernel/idprom.c | 183 | ||||
| -rw-r--r-- | arch/sparc/kernel/ioport.c | 12 | ||||
| -rw-r--r-- | arch/sparc/kernel/irq.c | 335 | ||||
| -rw-r--r-- | arch/sparc/kernel/probe.c | 432 | ||||
| -rw-r--r-- | arch/sparc/kernel/process.c | 112 | ||||
| -rw-r--r-- | arch/sparc/kernel/promops.c | 107 | ||||
| -rw-r--r-- | arch/sparc/kernel/setup.c | 120 | ||||
| -rw-r--r-- | arch/sparc/kernel/signal.c | 71 | ||||
| -rw-r--r-- | arch/sparc/kernel/traps.c | 47 |
12 files changed, 3438 insertions, 0 deletions
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile new file mode 100644 index 000000000..b5151d77e --- /dev/null +++ b/arch/sparc/kernel/Makefile @@ -0,0 +1,47 @@ +# +# Makefile for the linux 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). +# +# Note 2! The CFLAGS definitions are now in the main makefile... + +.c.s: + $(CC) $(CFLAGS) -S $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) -c $< +.S.s: + $(CPP) -D__ASSEMBLY__ -ansi $< -o $*.s +.S.o: + $(CC) -D__ASSEMBLY__ -ansi -c $< -o $*.o + +OBJS = entry.o traps.o irq.o process.o promops.o signal.o ioport.o setup.o \ + idprom.o probe.o + +all: kernel.o head.o + +head.o: head.s + +head.s: head.S $(TOPDIR)/include/asm-sparc/head.h + $(CPP) -D__ASSEMBLY__ -ansi -o $*.s $< + +kernel.o: $(OBJS) + $(LD) -r -o kernel.o $(OBJS) + sync + +dep: + $(CPP) -M *.c > .depend + +dummy: + +# +# include a dependency file if one exists +# +ifeq (.depend,$(wildcard .depend)) +include .depend +endif + + diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S new file mode 100644 index 000000000..21548015e --- /dev/null +++ b/arch/sparc/kernel/entry.S @@ -0,0 +1,927 @@ +/* arch/sparc/kernel/entry.S: Sparc trap low-level entry points. + * + * Sparc traps are so ugly, this code is going to go through a lot + * of changes as I find out more interesting things. See head.S for + * the trap table and how it works, this will show you how we get + * to these routines. + * + * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <asm/head.h> +#include <asm/asi.h> +#include <asm/psr.h> +#include <asm/cprefix.h> +#include <asm/vaddrs.h> + +/* Here are macros for routines we do often, this allows me to inline this + * without making the code look real ugly. Well, the macro looks ugly too but + * makes the trap entry code easier to understand. + */ + +/* I really don't like synthetic instructions. So I avoid them like the + * plague. + */ + +/* Note that when I have to write a window out, and it is a user's window, I + * have to check that the pages of memory that I am going to throw the window(s) + * onto are valid and are writable by the user (this is %sp to %sp + 64) before + * I start dumping stuff there. We always assume that kernels stack is ok. + * + * If we have to save a kernel window, only one branch is taken. This should + * make trap handlers quicker in this scenario. + * + * Once 'current' is loaded into %g6, it stays there until we leave + * this macro. + * + * XXX must do some checking on the assumption that kernel stack is always ok + */ + +/* I will document how this works real soon. TODO */ + +#define TRAP_WIN_CLEAN \ + or %g0, %g5, %l5; /* we need the globals to do our work */ \ + or %g0, %g6, %l6; /* and %l0 to %l4 are loaded with important */ \ + or %g0, %g7, %l7; /* information like the psr and pc's to return to */ \ + sethi %hi( C_LABEL(current) ), %g6; \ + ld [%g6 + %lo( C_LABEL(current) )], %g6; \ + ld [%g6 + THREAD_UWINDOWS], %g7; /* how many user wins are active? */ \ + subcc %g7, 0x0, %g0; \ + bne 2f; /* If there are any, branch. */ \ + save %g0, %g0, %g0; /* Save into that window either way. */ \ + std %l0, [%sp]; /* If above shows only kernel windows */ \ +1: std %l2, [%sp + 0x8]; /* then we get here. */ \ + std %l4, [%sp + 0x10]; \ + std %l6, [%sp + 0x18]; \ + std %i0, [%sp + 0x20]; \ + std %i2, [%sp + 0x28]; \ + std %i4, [%sp + 0x30]; \ + std %i6, [%sp + 0x38]; \ + or %g0, 0x1, %g5; \ + rd %psr, %g7; \ + sll %g5, %g7, %g5; \ + wr %g5, 0x0, %wim; /* update %wim to 'now' invalid */ \ + and %g7, 0x1f, %g7; \ + st %g7, [%g6 + THREAD_WIM]; /* save 'this' threads mask */ \ + restore %g0, %g0, %g0; \ + or %g0, %l5, %g5; /* restore the globals we used */ \ + or %g0, %l6, %g6; \ + b 8f; /* we are done */ \ + or %g0, %l7, %g7; \ +2: sub %g7, 0x1, %g7; \ + st %g7, [%g6 + THREAD_UWINDOWS]; /* There are user windows if we */ \ + andcc %sp, 0x7, %g0; /* get here. Check for stack alignment. */ \ + bne 5f; /* Stack is unaligned, yuck. */ \ + sra %sp, 0x1e, %g7; /* This stuff checks to see if top 3-bits */ \ + subcc %g7, 0x0, %g0; /* of stack pointer address are ok. */ \ + be,a 3f; \ + andn %sp, 0xfff, %g7; \ + subcc %g7, -1, %g0; \ + bne 5f; /* bad stack pointer, ugh */ \ + andn %sp, 0xfff, %g7; \ +3: lda [%g7] ASI_PTE, %g7; /* Ok, user stack is a valid address */ \ + srl %g7, 0x1d, %g7; \ + subcc %g7, 0x6, %g0; /* Can the user write to it? */ \ + bne 5f; \ + and %sp, 0xfff, %g7; \ + subcc %g7, 0xfc1, %g0; /* Is our save area on one page? */ \ + bl,a 1b; \ + std %l0, [%sp]; \ + add %sp, 0x38, %g5; /* Nope, have to check both pages */ \ + sra %g5, 0x1e, %g7; \ + subcc %g7, 0x0, %g0; \ + be,a 4f; \ + andn %g5, 0xfff, %g7; \ + subcc %g7, -1, %g0; \ + bne 5f; \ + andn %g5, 0xfff, %g7; \ +4: lda [%g7] ASI_PTE, %g7; /* Stack space in 2nd page is valid */ \ + srl %g7, 0x1d, %g7; \ + subcc %g7, 0x6, %g0; /* Can user write here too? */ \ + be,a 1b; \ + std %l0, [%sp]; \ +5: ld [%g6 + THREAD_UWINDOWS], %g7; /* This is due to either bad page perms */ \ + add %g6, THREAD_REG_WINDOW, %g5; /* for the users stack area, or the stack */ \ +6: std %l0, [%g5]; /* pointer is misaligned. See above. */ \ + std %l2, [%g5 + 0x8]; \ + std %l4, [%g5 + 0x10]; \ + std %l6, [%g5 + 0x18]; \ + std %i0, [%g5 + 0x20]; \ + std %i2, [%g5 + 0x28]; \ + std %i4, [%g5 + 0x30]; \ + std %i6, [%g5 + 0x38]; \ + subcc %g7, 0x1, %g7; \ + bge,a 6b; /* while(uwindows>=0) { write_win(); */ \ + save %g5, 0x40, %g5; /* uwindows--; } */ \ + st %sp, [%g6 + THREAD_USP]; \ + or %g0, 0x1, %g5; \ + rd %psr, %g7; \ + sll %g5, %g7, %g5; \ + wr %g5, 0x0, %wim; \ + and %g7, 0x1f, %g7; \ + st %g7, [%g6 + THREAD_WIM]; /* Update thread_struct fields */ \ + ld [%g6 + THREAD_UWINDOWS], %g7; \ + add %g7, 0x1, %g5; \ + st %g5, [%g6 + THREAD_W_SAVED]; \ + st %g0, [%g6 + THREAD_UWINDOWS]; \ +7: subcc %g7, 0x1, %g7; /* Restore back to where we started. */ \ + bge 7b; \ + restore %g0, %g0, %g0; \ + or %g0, %l5, %g5; /* Restore the globals. */ \ + or %g0, %l6, %g6; \ + or %g0, %l7, %g7; \ +8: nop; /* We are done when we get here. */ \ + +/* As if the last macro wasn't enough, we have to go through a very similar routine + * upon entry to most traps and interrupts. This is save away the current window + * if it is the trap window, clean it, and adjust the stack for the handler c-code + * to work. + */ + +#define ENTER_TRAP \ + rd %wim, %l4; \ + or %g0, 0x1, %l5; \ + sll %l5, %l0, %l5; \ + andcc %l0, 0x40, %g0; \ + bz 1f; \ + andcc %l4, %l5, %g0; \ + bz,a 3f; \ + sub %fp, 0xb0, %sp; \ + TRAP_WIN_CLEAN \ + b 3f; \ + sub %fp, 0xb0, %sp; \ +1: sethi %hi( C_LABEL(current) ), %l6; \ + ld [%l6 + %lo( C_LABEL(current) )], %l6; \ + ld [%l6 + THREAD_WIM], %l5; \ + and %l0, 0x1f, %l4; \ + cmp %l5, %l3; \ + ble,a 4f; \ + sethi %hi( C_LABEL(nwindowsm1) ), %l4; \ + sub %l5, %l3, %l3; \ + b 5f; \ + sub %l3, 0x1, %l5; \ +4: ld [%l4 + %lo( C_LABEL(nwindowsm1) )], %l4; \ + sub %l4, %l3, %l4; \ + add %l5, %l4, %l5; \ +5: st %l5, [%l6 + THREAD_UWINDOWS]; \ + bz,a 2f; \ + sethi %hi(TASK_SIZE-176), %l5; \ + TRAP_WIN_CLEAN; \ + sethi %hi( C_LABEL(current) ), %l6; \ + ld [%l6 + %lo( C_LABEL(current) )], %l6; \ + sethi %hi(TASK_SIZE-176), %l5; \ +2: or %l5, %lo(TASK_SIZE-176), %l5; \ + add %l6, %l5, %sp; \ +3: \ + +#define ENTER_IRQ \ + rd %wim, %l4; \ + or %g0, 0x1, %l5; \ + sll %l5, %l0, %l5; \ + andcc %l0, 0x40, %g0; \ + bz 1f; \ + andcc %l4, %l5, %g0; \ + sethi %hi( C_LABEL(eintstack) ), %l7; \ + or %l7, %lo( C_LABEL(eintstack) ), %l7; \ + bz 0f; \ + nop; \ + TRAP_WIN_CLEAN \ + sethi %hi( C_LABEL(eintstack) ), %l7; \ + or %l7, %lo( C_LABEL(eintstack) ), %l7; \ +0: subcc %fp, %l7, %g0; \ + bg,a 3f; \ + sub %l7, 0xb0, %sp; \ + b 3f; \ + sub %fp, 0xb0, %sp; \ +1: sethi %hi( C_LABEL(current) ), %l6; \ + ld [%l6 + %lo( C_LABEL(current) )], %l6; \ + ld [%l6 + THREAD_WIM], %l5; \ + and %l0, 0x1f, %l7; \ + cmp %l5, %l7; \ + ble,a 4f; \ + sethi %hi( C_LABEL(nwindowsm1) ), %l4; \ + sub %l5, %l7, %l7; \ + b 5f; \ + sub %l7, 0x1, %l5; \ +4: ld [%l4 + %lo( C_LABEL(nwindowsm1) )], %l4; \ + sub %l4, %l7, %l4; \ + add %l5, %l4, %l5; \ +5: st %l5, [%l6 + THREAD_UWINDOWS]; \ + bz,a 2f; \ + sethi %hi( C_LABEL(eintstack) ), %l7; \ + TRAP_WIN_CLEAN \ + sethi %hi( C_LABEL(eintstack) ), %l7; \ +2: \ + sub %l7, 0xb0, %sp; \ +3: + + + .text + .align 4 + +/* Default trap handler */ + .globl my_trap_handler +my_trap_handler: +#if 1 + jmp %l1 + rett %l2 + nop +#else + rd %wim, %l4 + or %g0, 0x1, %l5 + sll %l5, %l0, %l5 + cmp %l4, %l5 ! are we in the invalid window? + + TRAP_WIN_CLEAN + + nop + or %g0, %l3, %o0 + call C_LABEL(do_hw_interrupt) + or %g0, %g0, %o1 + wr %l0, 0x20, %psr ! re-enable traps and reset the condition codes + nop + nop + nop ! click our heels three times, "no place like home" + jmp %l1 + rett %l2 +#endif /* bogon */ + + .align 4 + .globl sparc_timer +sparc_timer: + sethi %hi(TIMER_VADDR), %l4 + or %l4, %lo(TIMER_VADDR), %l4 ! read the limit register + ld [%l4 + 0xc], %l4 ! to clear the interrupt + rd %wim, %l4 + or %g0, 0x1, %l5 + sll %l5, %l0, %l5 + andcc %l0, 0x40, %g0 + bz st1 + sethi %hi( C_LABEL(eintstack) ), %l7 + andcc %l4, %l5, %g0 + bz st0 + or %l7, %lo( C_LABEL(eintstack) ), %l7 + TRAP_WIN_CLEAN + sethi %hi( C_LABEL(eintstack) ), %l7 + or %l7, %lo( C_LABEL(eintstack) ), %l7 +st0: subcc %fp, %l7, %g0 + bg,a st3 + sub %l7, 0xb0, %sp + b st3 + sub %fp, 0xb0, %sp +st1: sethi %hi( C_LABEL(current) ), %l6 + ld [%l6 + %lo( C_LABEL(current) )], %l6 + ld [%l6 + THREAD_WIM], %l5 + and %l0, 0x1f, %l7 + cmp %l5, %l7 + ble,a st4 + sethi %hi( C_LABEL(nwindowsm1) ), %l4 + sub %l5, %l7, %l7 + b st5 + sub %l7, 0x1, %l5 +st4: ld [%l4 + %lo( C_LABEL(nwindowsm1) )], %l4 + sub %l4, %l7, %l4 + add %l5, %l4, %l5 +st5: st %l5, [%l6 + THREAD_UWINDOWS] + sethi %hi( C_LABEL(eintstack) ), %l7 + bz,a st2 + or %l7, %lo( C_LABEL(eintstack) ), %l7 + TRAP_WIN_CLEAN + sethi %hi( C_LABEL(eintstack) ), %l7 + or %l7, %lo( C_LABEL(eintstack) ), %l7 +st2: sub %l7, 0xb0, %sp + +st3: std %g2, [%sp + 96 + 24] + or %g0, %g1, %l7 + rd %y, %l6 + std %g4, [%sp + 96 + 32] + andn %l0, PSR_PIL, %l4 + sll %l3, 0x8, %l5 + std %g6, [%sp + 96 + 40] + or %l5, %l4, %l4 + + wr %l4, 0x0, %psr + wr %l4, PSR_ET, %psr + + std %l0, [%sp + 96 + 0] + std %l2, [%sp + 96 + 8] + st %fp, [%sp + 96 + 16] + + or %g0, 14, %o0 + or %g0, %g0, %o1 + call C_LABEL(do_sparc_timer) + nop + + or %g0, %l7, %g1 + wr %l6, 0x0, %y + ldd [%sp + 96 + 24], %g2 + ldd [%sp + 96 + 32], %g4 + ldd [%sp + 96 + 40], %g6 + wr %l0, 0x0, %psr + nop + nop + nop + + and %l0, 31, %l5 + sethi %hi(lnx_winmask), %l6 + or %l6, %lo(lnx_winmask), %l6 + ldub [%l6 + %l5], %l5 + andcc %l0, PSR_PS, %g0 + bnz 1f + rd %wim, %l4 + +1: andcc %l5, %l4, %g0 + bnz 2f + wr %l0, 0x0, %psr + nop + nop + nop + + jmp %l1 + rett %l2 + +2: wr %g0, 0x0, %wim + nop + nop + nop + + restore + restore %g0, 0x1, %l1 + rd %psr, %l0 + and %l0, 31, %l0 + sll %l1, %l0, %l1 + wr %l1, 0x0, %wim + sethi %hi( C_LABEL(current) ), %l1 + ld [%l1 + %lo( C_LABEL(current) ) ], %l1 + st %l0, [%l1 + THREAD_WIM] + save %g0, %g0, %g0 + + ldd [%sp], %l0 + ldd [%sp + 0x8], %l2 + ldd [%sp + 0x10], %l4 + ldd [%sp + 0x18], %l6 + ldd [%sp + 0x20], %i0 + ldd [%sp + 0x28], %i2 + ldd [%sp + 0x30], %i4 + ldd [%sp + 0x38], %i6 + + save %g0, %g0, %g0 + + jmp %l1 + rett %l2 + + +/* For now all IRQ's not registered get sent here so I can see + * what is poking the chip. + */ + + .align 4 + .globl stray_irq_entry +stray_irq_entry: + rd %wim, %l4 + or %g0, 0x1, %l5 + sll %l5, %l0, %l5 + andcc %l0, 0x40, %g0 + bz tt1 + sethi %hi( C_LABEL(eintstack) ), %l7 + andcc %l4, %l5, %g0 + bz tt0 + or %l7, %lo( C_LABEL(eintstack) ), %l7 + TRAP_WIN_CLEAN + sethi %hi( C_LABEL(eintstack) ), %l7 + or %l7, %lo( C_LABEL(eintstack) ), %l7 +tt0: subcc %fp, %l7, %g0 + bg,a tt3 + sub %l7, 0xb0, %sp + b tt3 + sub %fp, 0xb0, %sp +tt1: sethi %hi( C_LABEL(current) ), %l6 + ld [%l6 + %lo( C_LABEL(current) )], %l6 + ld [%l6 + THREAD_WIM], %l5 + and %l0, 0x1f, %l7 + cmp %l5, %l7 + ble,a tt4 + sethi %hi( C_LABEL(nwindowsm1) ), %l4 + sub %l5, %l7, %l7 + b tt5 + sub %l7, 0x1, %l5 +tt4: ld [%l4 + %lo( C_LABEL(nwindowsm1) )], %l4 + sub %l4, %l7, %l4 + add %l5, %l4, %l5 +tt5: st %l5, [%l6 + THREAD_UWINDOWS] + sethi %hi( C_LABEL(eintstack) ), %l7 + bz,a tt2 + or %l7, %lo( C_LABEL(eintstack) ), %l7 + TRAP_WIN_CLEAN + sethi %hi( C_LABEL(eintstack) ), %l7 + or %l7, %lo( C_LABEL(eintstack) ), %l7 +tt2: sub %l7, 0xb0, %sp + +tt3: std %g2, [%sp + 96 + 24] + or %g0, %g1, %l7 + rd %y, %l6 + std %g4, [%sp + 96 + 32] + andn %l0, PSR_PIL, %l4 + sll %l3, 0x8, %l5 + std %g6, [%sp + 96 + 40] + or %l5, %l4, %l4 + + wr %l4, 0x0, %psr + wr %l4, PSR_ET, %psr + + std %l0, [%sp + 96 + 0] + std %l2, [%sp + 96 + 8] + st %fp, [%sp + 96 + 16] + + or %g0, %l3, %o0 + or %g0, %g0, %o1 + call C_LABEL(unexpected_irq) + nop + + or %g0, %l7, %g1 + wr %l6, 0x0, %y + ldd [%sp + 96 + 24], %g2 + ldd [%sp + 96 + 32], %g4 + ldd [%sp + 96 + 40], %g6 + wr %l0, 0x0, %psr + nop + nop + nop + + and %l0, 31, %l5 + sethi %hi(lnx_winmask), %l6 + or %l6, %lo(lnx_winmask), %l6 + ldub [%l6 + %l5], %l5 + andcc %l0, PSR_PS, %g0 + bnz 1f + rd %wim, %l4 + +1: andcc %l5, %l4, %g0 + bnz 2f + wr %l0, 0x0, %psr + nop + nop + nop + + jmp %l1 + rett %l2 + +2: wr %g0, 0x0, %wim + nop + nop + nop + + restore + restore %g0, 0x1, %l1 + rd %psr, %l0 + and %l0, 31, %l0 + sll %l1, %l0, %l1 + wr %l1, 0x0, %wim + sethi %hi( C_LABEL(current) ), %l1 + ld [%l1 + %lo( C_LABEL(current) ) ], %l1 + st %l0, [%l1 + THREAD_WIM] + save %g0, %g0, %g0 + + ldd [%sp], %l0 + ldd [%sp + 0x8], %l2 + ldd [%sp + 0x10], %l4 + ldd [%sp + 0x18], %l6 + ldd [%sp + 0x20], %i0 + ldd [%sp + 0x28], %i2 + ldd [%sp + 0x30], %i4 + ldd [%sp + 0x38], %i6 + + save %g0, %g0, %g0 + + jmp %l1 + rett %l2 + + + +/* This routine is optimized for kernel window fills. User fills take about two + * or three extra jumps on the average. We'll see how this works out. + */ + +/* Don't use local labels, or if you do be REAL CAREFUL. TRAP_WIN_CLEAN is + * full of them! If you think this routine is hairy, window spills are worse, + * see below. + */ + + .align 4 + .globl spill_window_entry +spill_window_entry: + andcc %l0, 0x40, %g0 ! see if this is a user window fill + bz,a spill_from_user + nop + + TRAP_WIN_CLEAN /* danger, danger... */ + wr %l0, 0x0, %psr + nop + jmp %l1 + rett %l2 + +spill_from_user: + sethi %hi( C_LABEL(current) ), %l6 + ld [%l6 + %lo( C_LABEL(current) )], %l6 + ld [%l6 + THREAD_WIM], %l5 + and %l0, 0x1f, %l3 + +/* I don't know what's worse, the extra comparison here, or an extra load + * from a lookup table, we'll see. + */ + cmp %l5, %l3 + ble,a 1f + sethi %hi( C_LABEL(nwindowsm1) ), %l4 + sub %l5, %l3, %l3 + b 2f + sub %l3, 0x1, %l5 +1: ld [%l4 + %lo( C_LABEL(nwindowsm1) )], %l4 + sub %l4, %l3, %l4 + add %l5, %l4, %l5 +2: st %l5, [%l6 + THREAD_UWINDOWS] + + TRAP_WIN_CLEAN /* danger, danger... */ + sethi %hi( C_LABEL(current) ), %l6 + ld [%l6 + %lo( C_LABEL(current) )], %l6 + ld [%l6 + THREAD_KSP], %sp + and %l0, 0x1f, %l3 + sethi %hi(lnx_winmask), %l6 + or %l6, %lo(lnx_winmask), %l6 + ldub [%l6 + %l3], %l5 + rd %wim, %l4 + jmp %l1 + rett %l2 + +/* A window spill has occurred. This presents a weird situation, a restore + * was attempted and a trap occurred. Therefore the restore attempt had no + * effect on window movement and the trap saved, which means it went in the + * other direction. :-( We are in a trap window which is two restores away + * from the window we want to un-invalidate so to speak and three away from + * the one which will become invalid after this routine. There are probably + * bugs already this routine. Bugs suck. + */ + +/* This is a very complicated and hairy routine, don't expect to understand + * it the first time. :> + */ + + .align 4 + .globl fill_window_entry +fill_window_entry: + wr %g0, 0, %wim ! Can not enter invalid register without this. + andcc %l0, 0x40, %g0 ! From user? + restore ! restore to where trap occurred + bz fill_from_user + restore ! enter invalid register, whee... + restore %g0, 0x1, %l1 ! enter one-past invalid register + rd %psr, %l0 ! this is the window we need to save + and %l0, 0x1f, %l0 + sll %l1, %l0, %l1 + wr %l1, 0x0, %wim + sethi %hi( C_LABEL(current) ), %l1 + ld [%l1 + %lo( C_LABEL(current) )], %l1 + st %l0, [%l1 + THREAD_WIM] + save %g0, %g0, %g0 ! back to invalid register + ldd [%sp], %l0 ! load the window from stack + ldd [%sp + 8], %l2 + ldd [%sp + 16], %l4 + ldd [%sp + 24], %l6 + ldd [%sp + 32], %i0 + ldd [%sp + 40], %i2 + ldd [%sp + 48], %i4 + ldd [%sp + 56], %i6 + save %g0, %g0, %g0 ! to window where trap happened + save %g0, %g0, %g0 ! back to trap window, so rett works + wr %l0, 0x0, %psr ! load condition codes + nop + jmp %l1 + rett %l2 ! are you as confused as I am? + +fill_from_user: + andcc %sp, 0x7, %g0 ! check for alignment of user stack + bne fill_bad_stack + sra %sp, 0x1e, %l7 + cmp %l7, 0x0 + be,a 1f + andn %sp, 0xfff, %l7 + cmp %l7, -1 + bne fill_bad_stack + andn %sp, 0xfff, %l7 +1: lda [%l7] ASI_PTE, %l7 + srl %l7, 0x1d, %l7 + andn %l7, 0x2, %l7 + cmp %l7, 0x4 + bne fill_bad_stack + and %sp, 0xfff, %l7 + cmp %l7, 0xfc1 + bl,a fill_stack_ok + restore %g0, 1, %l1 + add %sp, 0x38, %l5 + sra %sp, 0x1e, %l7 + cmp %l7, 0x0 + be,a 1f + andn %sp, 0xfff, %l7 + cmp %l7, -1 + bne fill_bad_stack + andn %sp, 0xfff, %l7 +1: lda [%l7] ASI_PTE, %l7 + srl %l7, 0x1d, %l7 + andn %l7, 0x2, %l7 + cmp %l7, 0x4 + be,a fill_stack_ok + restore %g0, 0x1, %l1 + +fill_bad_stack: + save %g0, %g0, %g0 ! save to where restore happened + save %g0, 0x1, %l4 ! save is an add remember? to trap window + sethi %hi( C_LABEL(current) ), %l6 + ld [%l6 + %lo( C_LABEL(current) )], %l6 + st %l4, [%l6 + THREAD_UWINDOWS] ! update current->tss values + ld [%l6 + THREAD_WIM], %l5 + sll %l4, %l5, %l4 + wr %l4, 0x0, %wim + ld [%l6 + THREAD_KSP], %sp ! set to kernel stack pointer + wr %l0, 0x20, %psr ! turn off traps + std %l0, [%sp + C_STACK] ! set up thread_frame on stack + rd %y, %l3 + std %l2, [%sp + C_STACK + 0x8] + or %g0, 0x6, %o0 ! so _sparc_trap knows what to do + st %g1, [%sp + C_STACK + 0x14] ! no need to save %g0, always zero + or %g0, %l0, %o1 + std %g2, [%sp + C_STACK + 0x18] + or %g0, %l1, %o2 + std %g4, [%sp + C_STACK + 0x20] + add %sp, C_STACK, %o3 + std %g6, [%sp + C_STACK + 0x28] + std %i0, [%sp + C_STACK + 0x30] + std %i2, [%sp + C_STACK + 0x38] + std %i4, [%sp + C_STACK + 0x40] + call sparc_trap + std %i6, [%sp + C_STACK + 0x48] + + ldd [%sp + C_STACK], %l0 + ldd [%sp + C_STACK + 0x8], %l2 + wr %l3, 0, %y + ld [%sp + C_STACK + 0x14], %g1 + ldd [%sp + C_STACK + 0x18], %g2 + ldd [%sp + C_STACK + 0x20], %g4 + ldd [%sp + C_STACK + 0x28], %g6 + ldd [%sp + C_STACK + 0x30], %i0 + ldd [%sp + C_STACK + 0x38], %i2 + ldd [%sp + C_STACK + 0x40], %i4 + wr %l0, 0, %psr ! disable traps again + ldd [%sp + C_STACK + 0x48], %i6 + sethi %hi( C_LABEL(current) ), %l6 + ld [%l6 + %lo( C_LABEL(current) )], %l6 + ld [%l6 + THREAD_W_SAVED], %l7 + cmp %l7, 0x0 + bl,a 1f + wr %g0, 0x0, %wim + b,a leave_trap + +1: or %g0, %g6, %l3 + or %g0, %l6, %g6 + st %g0, [%g6 + THREAD_W_SAVED] + restore %g0, %g0, %g0 + restore %g0, %g0, %g0 + restore %g0, 0x1, %l1 + rd %psr, %l0 + sll %l1, %l0, %l1 + wr %l1, 0x0, %wim + and %l0, 0x1f, %l0 + st %l0, [%g6 + THREAD_WIM] + nop + save %g0, %g0, %g0 + ldd [%sp], %l0 ! load number one + ldd [%sp + 0x8], %l2 + ldd [%sp + 0x10], %l4 + ldd [%sp + 0x18], %l6 + ldd [%sp + 0x20], %i0 + ldd [%sp + 0x28], %i2 + ldd [%sp + 0x30], %i4 + ldd [%sp + 0x38], %i6 + save %g0, %g0, %g0 + ldd [%sp], %l0 ! load number two + ldd [%sp + 0x8], %l2 + ldd [%sp + 0x10], %l4 + ldd [%sp + 0x18], %l6 + ldd [%sp + 0x20], %i0 + ldd [%sp + 0x28], %i2 + ldd [%sp + 0x30], %i4 + ldd [%sp + 0x38], %i6 + save %g0, %g0, %g0 ! re-enter trap window + wr %l0, 0x0, %psr ! restore condition codes + or %g0, %l3, %g6 ! restore scratch register + jmp %l1 + rett %l2 + +fill_stack_ok: + rd %psr, %l0 + sll %l1, %l0, %l1 + wr %l1, 0x0, %wim + sethi %hi( C_LABEL(current) ), %l2 + ld [%l2 + %lo( C_LABEL(current) )], %l2 + and %l0, 0x1f, %l0 + st %l0, [%l2 + THREAD_WIM] + save %g0, %g0, %g0 + ldd [%sp], %l0 ! only one load necessary + ldd [%sp + 0x8], %l2 + ldd [%sp + 0x10], %l4 + ldd [%sp + 0x18], %l6 + ldd [%sp + 0x20], %i0 + ldd [%sp + 0x28], %i2 + ldd [%sp + 0x30], %i4 + ldd [%sp + 0x38], %i6 + save %g0, %g0, %g0 + save %g0, %g0, %g0 ! save into trap window + wr %l0, 0x0, %psr ! local number 0 here has cond codes + nop + jmp %l1 + rett %l2 + + .align 4 + .globl trap_entry +trap_entry: + TRAP_WIN_CLEAN + jmp %l1 + rett %l2 + + .align 4 + .globl linux_trap_nmi +linux_trap_nmi: + TRAP_WIN_CLEAN + jmp %l1 + rett %l2 + + .align 4 + .globl sparc_trap +sparc_trap: + TRAP_WIN_CLEAN + jmp %l1 + rett %l2 + + .align 4 + .globl leave_trap +leave_trap: + jmp %l1 + rett %l2 + +/* The following two things point to window management tables. The first + one is used to quickly look up how many user windows there are from + trap-land. The second is used in a trap handler to determine if a rett + instruction will land us smack inside the invalid window that possibly + the trap was called to fix-up. +*/ + +/* For now these are static tables geared for a 7 window sparc. */ + + .data + .align 4 +lnx_winmask: .byte 2, 4, 8, 16, 32, 64, 128, 1 ! lnx_winmask[0..7] + + + .align 4 + .globl C_LABEL(sys_call_table) +C_LABEL(sys_call_table): + .long C_LABEL(sys_setup) /* 0 */ + .long C_LABEL(sys_exit) + .long C_LABEL(sys_fork) + .long C_LABEL(sys_read) + .long C_LABEL(sys_write) + .long C_LABEL(sys_open) /* 5 */ + .long C_LABEL(sys_close) + .long C_LABEL(sys_waitpid) + .long C_LABEL(sys_creat) + .long C_LABEL(sys_link) + .long C_LABEL(sys_unlink) /* 10 */ + .long C_LABEL(sys_execve) + .long C_LABEL(sys_chdir) + .long C_LABEL(sys_time) + .long C_LABEL(sys_mknod) + .long C_LABEL(sys_chmod) /* 15 */ + .long C_LABEL(sys_chown) + .long C_LABEL(sys_break) + .long C_LABEL(sys_stat) + .long C_LABEL(sys_lseek) + .long C_LABEL(sys_getpid) /* 20 */ + .long C_LABEL(sys_mount) + .long C_LABEL(sys_umount) + .long C_LABEL(sys_setuid) + .long C_LABEL(sys_getuid) + .long C_LABEL(sys_stime) /* 25 */ + .long C_LABEL(sys_ni_syscall) /* this will be sys_ptrace() */ + .long C_LABEL(sys_alarm) + .long C_LABEL(sys_fstat) + .long C_LABEL(sys_pause) + .long C_LABEL(sys_utime) /* 30 */ + .long C_LABEL(sys_stty) + .long C_LABEL(sys_gtty) + .long C_LABEL(sys_access) + .long C_LABEL(sys_nice) + .long C_LABEL(sys_ftime) /* 35 */ + .long C_LABEL(sys_sync) + .long C_LABEL(sys_kill) + .long C_LABEL(sys_rename) + .long C_LABEL(sys_mkdir) + .long C_LABEL(sys_rmdir) /* 40 */ + .long C_LABEL(sys_dup) + .long C_LABEL(sys_pipe) + .long C_LABEL(sys_times) + .long C_LABEL(sys_prof) + .long C_LABEL(sys_brk) /* 45 */ + .long C_LABEL(sys_setgid) + .long C_LABEL(sys_getgid) + .long C_LABEL(sys_signal) + .long C_LABEL(sys_geteuid) + .long C_LABEL(sys_getegid) /* 50 */ + .long C_LABEL(sys_acct) + .long C_LABEL(sys_phys) + .long C_LABEL(sys_lock) + .long C_LABEL(sys_ioctl) + .long C_LABEL(sys_fcntl) /* 55 */ + .long C_LABEL(sys_mpx) + .long C_LABEL(sys_setpgid) + .long C_LABEL(sys_ulimit) + .long C_LABEL(sys_olduname) + .long C_LABEL(sys_umask) /* 60 */ + .long C_LABEL(sys_chroot) + .long C_LABEL(sys_ustat) + .long C_LABEL(sys_dup2) + .long C_LABEL(sys_getppid) + .long C_LABEL(sys_getpgrp) /* 65 */ + .long C_LABEL(sys_setsid) + .long C_LABEL(sys_sigaction) + .long C_LABEL(sys_sgetmask) + .long C_LABEL(sys_ssetmask) + .long C_LABEL(sys_setreuid) /* 70 */ + .long C_LABEL(sys_setregid) + .long C_LABEL(sys_sigsuspend) + .long C_LABEL(sys_sigpending) + .long C_LABEL(sys_sethostname) + .long C_LABEL(sys_setrlimit) /* 75 */ + .long C_LABEL(sys_getrlimit) + .long C_LABEL(sys_getrusage) + .long C_LABEL(sys_gettimeofday) + .long C_LABEL(sys_settimeofday) + .long C_LABEL(sys_getgroups) /* 80 */ + .long C_LABEL(sys_setgroups) + .long C_LABEL(sys_select) + .long C_LABEL(sys_symlink) + .long C_LABEL(sys_lstat) + .long C_LABEL(sys_readlink) /* 85 */ + .long C_LABEL(sys_uselib) + .long C_LABEL(sys_swapon) + .long C_LABEL(sys_reboot) + .long C_LABEL(sys_readdir) + .long C_LABEL(sys_mmap) /* 90 */ + .long C_LABEL(sys_munmap) + .long C_LABEL(sys_truncate) + .long C_LABEL(sys_ftruncate) + .long C_LABEL(sys_fchmod) + .long C_LABEL(sys_fchown) /* 95 */ + .long C_LABEL(sys_getpriority) + .long C_LABEL(sys_setpriority) + .long C_LABEL(sys_profil) + .long C_LABEL(sys_statfs) + .long C_LABEL(sys_fstatfs) /* 100 */ + .long C_LABEL(sys_ni_syscall) + .long C_LABEL(sys_socketcall) + .long C_LABEL(sys_syslog) + .long C_LABEL(sys_setitimer) + .long C_LABEL(sys_getitimer) /* 105 */ + .long C_LABEL(sys_newstat) + .long C_LABEL(sys_newlstat) + .long C_LABEL(sys_newfstat) + .long C_LABEL(sys_uname) + .long C_LABEL(sys_ni_syscall) /* 110 */ + .long C_LABEL(sys_vhangup) + .long C_LABEL(sys_idle) + .long C_LABEL(sys_ni_syscall) /* was vm86, meaningless on Sparc */ + .long C_LABEL(sys_wait4) + .long C_LABEL(sys_swapoff) /* 115 */ + .long C_LABEL(sys_sysinfo) + .long C_LABEL(sys_ipc) + .long C_LABEL(sys_fsync) + .long C_LABEL(sys_sigreturn) + .long C_LABEL(sys_ni_syscall) /* 120 */ + .long C_LABEL(sys_setdomainname) + .long C_LABEL(sys_newuname) + .long C_LABEL(sys_ni_syscall) + .long C_LABEL(sys_adjtimex) + .long C_LABEL(sys_mprotect) /* 125 */ + .long C_LABEL(sys_sigprocmask) + .long C_LABEL(sys_create_module) + .long C_LABEL(sys_init_module) + .long C_LABEL(sys_delete_module) + .long C_LABEL(sys_get_kernel_syms) /* 130 */ + .long C_LABEL(sys_ni_syscall) + .long C_LABEL(sys_getpgid) + .long C_LABEL(sys_fchdir) + .long C_LABEL(sys_bdflush) + .long C_LABEL(sys_sysfs) /* 135 */ + .long C_LABEL(sys_personality) + .long 0 /* for afs_syscall */ + .long C_LABEL(sys_setfsuid) + .long C_LABEL(sys_setfsgid) + .long C_LABEL(sys_llseek) /* 140 */ + .align 4 diff --git a/arch/sparc/kernel/head.S b/arch/sparc/kernel/head.S new file mode 100644 index 000000000..c3a5453e7 --- /dev/null +++ b/arch/sparc/kernel/head.S @@ -0,0 +1,1045 @@ +/* boot.S: The initial boot code for the Sparc port of Linux. + + Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) + + This file has to serve three purposes. + + 1) determine the prom-version and cpu/architecture + 2) print enough useful info before we start to execute + c-code that I can possibly begin to debug things + 3) Hold the vector of trap entry points + + The Sparc offers many challenges to kernel design. Here I will + document those I have come across thus far. Upon bootup the boot + prom loads your a.out image into memory. This memory the prom has + already mapped for you in two places, however as far as I can tell + the virtual address cache is not turned on although the MMU is + translating things. You get loaded at 0x4000 exactly and you are + aliased to 0xf8004000 with the appropriate mmu entries. So, when + you link a boot-loadable object you want to do something like: + + ld -e start -Ttext 4000 -o mykernel myobj1.o myobj2.o .... + + to produce a proper image. + + At boot time you are given (as far as I can tell at this time) + one key to figure out what machine you are one and what devices + are available. The prom when it loads you leaves a pointer to + the 'rom vector' in register %o0 right before it jumps to your + starting address. This is a pointer to a struct that is full of + pointer to functions (ie. printf, halt, reboot), pointers to + linked lists (ie. memory mappings), and pointer to empirical + constants (ie. stdin and stdout magic cookies + rom version). + Starting with this piece of information you can figure out + just about anything you want about the machine you are on. + + Although I don't use it now, if you are on a Multiprocessor and + therefore a v3 or above prom, register %o2 at boot contains a + function pointer you must call before you proceed to invoke the + other cpu's on the machine. I have no idea what kind of magic this + is, give me time. +*/ + +#include <asm/cprefix.h> +#include <asm/head.h> +#include <asm/version.h> +#include <asm/asi.h> +#include <asm/contregs.h> +#include <asm/psr.h> +#include <asm/page.h> + + .data + +/* First thing to go in the data segment is the interrupt stack. */ + + .globl C_LABEL(intstack) + .globl C_LABEL(eintstack) +C_LABEL(intstack): + .skip 4 * PAGE_SIZE ! 16k = 128 128-byte stack frames +C_LABEL(eintstack): + + + +/* + The following are used with the prom_vector node-ops to figure out + the cpu-type +*/ + + .globl C_LABEL(cputyp) + +C_LABEL(cputyp): + .word 1 + +C_LABEL(cputypval): + .asciz "sun4c" + .ascii " " + + .align 4 +/* + * Sun people can't spell worth damn. "compatability" indeed. + * At least we *know* we can't spell, and use a spell-checker. + */ + +/* Uh, actually Linus it is I who cannot spell. Too much murky + * Sparc assembly will do this to ya. + */ +C_LABEL(cputypvar): + .asciz "compatability" + +C_LABEL(cputypvallen) = C_LABEL(cputypvar) - C_LABEL(cputypval) + +/* This hold the prom-interface-version number for either v0 or v2. */ + + .align 4 + .globl C_LABEL(prom_iface_vers) + +C_LABEL(prom_iface_vers): .skip 4 + +/* WARNING: evil messages follow */ + + .align 4 + +sun4_notsup: + .asciz "Sparc-Linux: sun4 support not implemented yet\n\n" + .align 4 + +sun4m_notsup: + .asciz "Sparc-Linux: sun4m support does not exist\n\n" + .align 4 + +sun4d_notsup: + .asciz "Sparc-Linux: sun4d support does not exist\n\n" + .align 4 + +you_lose: + .asciz "You lose..... Thanks for playing...\n" + .align 4 + + + .globl boot_msg + +/* memory descriptor property strings, v2 = yuk yuk yuk */ +/* XXX how to figure out vm mapped by prom? May have to scan magic addresses */ + +mem_prop_physavail: .asciz "available" + + .align 4 +mem_prop_phystot: .asciz "reg" + +/* v2_memory descriptor struct kludged here for assembly, if it ain't broke */ + + .align 4 +v2_mem_struct: .skip 0xff + + .align 4 +v2_printf_physavail: .asciz "Physical Memory Available: 0x%x bytes" + + .align 4 +v2_printf_phystot: .asciz "Physical Memory: 0x%x bytes" + +/* A place to store property strings returned from the prom 'node' funcs */ + + .align 4 +prop_string_buf: .skip 32 + + .align 4 +prop_name: .asciz "name" + + .align 4 +current_node: .skip 4 + + +/* nice little boot message */ + + .align 4 +boot_msg: + .ascii "Booting Sparc-Linux V0.00PRE-ALPHA " + .ascii WHO_COMPILED_ME + .ascii "\r\n" + .align 4 + + .globl boot_msg2 + +boot_msg2: + .asciz "Booting Sparclinux V0.00 PRE-ALPHA on a (SUN4C)\r\n\n" + + .align 4 + +pstring1: + .asciz "Prom Magic Cookie: 0x%x \n" + .align 4 + +pstring2: + .asciz "Interface Version: v%d\n" + .align 4 + +pstring3: + .asciz "Prom Revision: V%d\n\n" + .align 4 + +pstring4: + .ascii "Total Physical Memory: %d bytes\nVM mapped by Prom: %d bytes\n" + .asciz "Available Physical Memory: %d bytes\n" + .align 4 + + + .text + + .globl C_LABEL(msgbuf) +msgbufsize = PAGE_SIZE ! 1 page for msg buffer +C_LABEL(msgbuf) = PAGE_SIZE + + +IE_reg_addr = C_LABEL(msgbuf) + msgbufsize ! this page not used; points to IEreg + + +/* Ok, things start to get interesting. We get linked such that 'start' + is the entry symbol. However, it is real low in kernel address space + and as such a nifty place to place the trap table. We achieve this goal + by just jumping to 'gokernel' for the first trap's entry as the sparc + never receives the zero trap as it is real special (hw reset). + + Each trap entry point is the size of 4 sparc instructions (or 4 bytes + * 4 insns = 16 bytes). There are 128 hardware traps (some undefined + or unimplemented) and 128 software traps (sys-calls, etc.). + + One of the instructions must be a branch. More often than not this + will be to a trap handler entry point because it is completely + impossible to handle any trap in 4 insns. I welcome anyone to + challenge this theory. :-) + + On entry into this table the hardware has loaded the program counter + at which the trap occurred into register %l1 and the next program + counter into %l2, this way we can return from the trap with a simple + + jmp %l1; rett %l2 ! poof... + + after properly servicing the trap. It wouldn't be a bad idea to load + some more information into the local regs since we have technically + 2 or 3 instructions to play with besides the jmp to the 'real' trap + handler (one can even go in the delay slot). For now I am going to put + the %psr (processor status register) and the trap-type value in %l0 + and %l3 respectively. Also, for IRQ's I'll put the level in %l4. + +*/ + + .globl start + .globl _start /* warning, solaris hack */ + .globl C_LABEL(trapbase) +_start: /* danger danger */ +start: +C_LABEL(trapbase): + b gokernel; nop; nop; nop; ! we never get trap #0 it is special + + TRAP_ENTRY(0x1, my_trap_handler) /* Instruction Access Exception */ + TRAP_ENTRY(0x2, my_trap_handler) /* Illegal Instruction */ + TRAP_ENTRY(0x3, my_trap_handler) /* Privileged Instruction */ + TRAP_ENTRY(0x4, my_trap_handler) /* Floating Point Disabled */ + TRAP_ENTRY(0x5, spill_window_entry) /* Window Overflow */ + TRAP_ENTRY(0x6, fill_window_entry) /* Window Underflow */ + TRAP_ENTRY(0x7, my_trap_handler) /* Memory Address Not Aligned */ + TRAP_ENTRY(0x8, my_trap_handler) /* Floating Point Exception */ + TRAP_ENTRY(0x9, my_trap_handler) /* Data Miss Exception */ + TRAP_ENTRY(0xa, my_trap_handler) /* Tagged Instruction Overflow */ + TRAP_ENTRY(0xb, my_trap_handler) /* Watchpoint Detected */ + TRAP_ENTRY(0xc, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0xd, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0xe, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0xf, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x10, my_trap_handler) /* Undefined... */ + +/* Level'd interrupt entry points, see macro defs above */ + + TRAP_ENTRY_INTERRUPT_SOFT(1, 0x101) /* IRQ Software/SBUS Level 1 */ + TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */ + TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */ + TRAP_ENTRY_INTERRUPT_SOFT(4, 0x104) /* IRQ Software Level 4 */ + TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */ + TRAP_ENTRY_INTERRUPT_SOFT(6, 0x106) /* IRQ Software Level 6 */ + TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */ + TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */ + TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */ + TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 */ + TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */ + TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */ + TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */ + TRAP_ENTRY_TIMER /* IRQ Timer #2 (one we use) */ + TRAP_ENTRY_INTERRUPT_NMI(15, linux_trap_nmi) /* Level 15 (nmi) */ + + TRAP_ENTRY(0x20, my_trap_handler) /* General Register Access Error */ + TRAP_ENTRY(0x21, my_trap_handler) /* Instruction Access Error */ + TRAP_ENTRY(0x22, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x23, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x24, my_trap_handler) /* Co-Processor Disabled */ + TRAP_ENTRY(0x25, my_trap_handler) /* Unimplemented FLUSH inst. */ + TRAP_ENTRY(0x26, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x27, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x28, my_trap_handler) /* Co-Processor Exception */ + TRAP_ENTRY(0x29, my_trap_handler) /* Data Access Error */ + TRAP_ENTRY(0x2a, my_trap_handler) /* Division by zero, you lose... */ + TRAP_ENTRY(0x2b, my_trap_handler) /* Data Store Error */ + TRAP_ENTRY(0x2c, my_trap_handler) /* Data Access MMU-Miss */ + TRAP_ENTRY(0x2d, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x2e, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x2f, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x30, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x31, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x32, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x33, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x34, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x35, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x36, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x37, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x38, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x39, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x3a, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x3b, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x3c, my_trap_handler) /* Instruction Access MMU-Miss */ + TRAP_ENTRY(0x3d, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x3e, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x3f, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x40, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x41, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x42, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x43, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x44, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x45, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x46, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x47, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x48, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x49, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x4a, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x4b, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x4c, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x4d, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x4e, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x4f, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x50, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x51, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x52, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x53, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x54, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x55, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x56, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x57, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x58, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x59, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x5a, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x5b, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x5c, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x5d, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x5e, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x5f, my_trap_handler) /* Undefined... */ + TRAP_ENTRY(0x60, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x61, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x62, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x63, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x64, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x65, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x66, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x67, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x68, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x69, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x6a, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x6b, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x6c, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x6d, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x6e, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x6f, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x70, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x71, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x72, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x73, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x74, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x75, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x76, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x77, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x78, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x79, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x7a, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x7b, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x7c, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x7d, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x7e, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x7f, my_trap_handler) /* Impl-Dep Exception */ + TRAP_ENTRY(0x80, my_trap_handler) /* SunOS System Call */ + TRAP_ENTRY(0x81, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x82, my_trap_handler) /* Divide by zero trap XXX */ + TRAP_ENTRY(0x83, my_trap_handler) /* Flush Windows Trap XXX */ + TRAP_ENTRY(0x84, my_trap_handler) /* Clean Windows Trap XXX */ + TRAP_ENTRY(0x85, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x86, my_trap_handler) /* Fix Unaligned Access Trap XXX */ + TRAP_ENTRY(0x87, my_trap_handler) /* Integer Overflow Trap XXX */ + TRAP_ENTRY(0x88, my_trap_handler) /* Slowaris System Call */ + TRAP_ENTRY(0x89, my_trap_handler) /* NetBSD System Call */ + TRAP_ENTRY(0x8a, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x8b, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x8c, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x8d, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x8e, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x8f, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x90, my_trap_handler) /* SparcLinux System Call */ + TRAP_ENTRY(0x91, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x92, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x93, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x94, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x95, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x96, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x97, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x98, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x99, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x9a, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x9b, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x9c, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x9d, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x9e, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0x9f, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa0, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa1, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa2, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa3, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa4, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa5, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa6, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa7, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa8, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xa9, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xaa, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xab, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xac, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xad, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xae, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xaf, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb0, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb1, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb2, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb3, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb4, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb5, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb6, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb7, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb8, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xb9, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xba, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xbb, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xbc, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xbd, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xbe, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xbf, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc0, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc1, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc2, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc3, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc4, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc5, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc6, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc7, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc8, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xc9, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xca, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xcb, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xcc, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xcd, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xce, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xcf, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd0, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd1, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd2, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd3, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd4, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd5, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd6, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd7, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd8, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xd9, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xda, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xdb, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xdc, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xdd, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xde, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xdf, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe0, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe1, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe2, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe3, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe4, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe5, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe6, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe7, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe8, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xe9, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xea, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xeb, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xec, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xed, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xee, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xef, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf0, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf1, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf2, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf3, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf4, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf5, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf6, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf7, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf8, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xf9, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xfa, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xfb, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xfc, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xfd, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xfe, my_trap_handler) /* Software Trap */ + TRAP_ENTRY(0xff, my_trap_handler) /* Software Trap */ + + .skip 4096 + +C_LABEL(msgbufmapped): + .word 1 + + + +/* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in + %g7 and at _prom_vector_p. And also quickly check whether we are on + a v0 or v2 prom. +*/ + +gokernel: or %g0, %o0, %g7 + sethi %hi( C_LABEL(prom_vector_p) ), %g1 + st %o0, [%g1 + %lo( C_LABEL(prom_vector_p) )] ! we will need it later + rd %psr, %l2 + rd %wim, %l3 + rd %tbr, %l4 + or %g0, %o2, %l5 ! could be prom magic value... + +#if 0 /* You think I'm nutz? */ + subcc %l5, 0x0, %g0 ! check for magic SMP pointer + bne nosmp + nop + call %o2 ! call smp prom setup + nop +#endif /* I will be soon... */ + +/* Acquire boot time privileged register values, this will help debugging. + * I figure out and store nwindows later on. + */ + +nosmp: sethi %hi( C_LABEL(boot_psr) ), %l1 + st %l2, [%l1 + %lo( C_LABEL(boot_psr) )] + sethi %hi( C_LABEL(boot_wim) ), %l1 + st %l3, [%l1 + %lo( C_LABEL(boot_wim) )] + sethi %hi( C_LABEL(boot_tbr) ), %l1 + st %l4, [%l1 + %lo( C_LABEL(boot_tbr) )] + sethi %hi( C_LABEL(boot_smp_ptr) ), %l1 + st %l5, [%l1 + %lo( C_LABEL(boot_smp_ptr) )] + + or %g0, %o0, %g7 + sethi %hi( C_LABEL(prom_vector_p) ), %g5 + st %o0, [%g5 + %lo( C_LABEL(prom_vector_p) )] ! we will need it later + + ld [%g7 + 0x4], %o3 + subcc %o3, 0x2, %g0 ! a v2 prom? + be found_v2 + nop + + /* paul@sfe.com.au */ + subcc %o3, 0x3, %g0 ! a v3 prom? + or %g0, 0x3, %o5 + sethi %hi(C_LABEL(prom_iface_vers) ), %g1 + st %o5, [%g1 + %lo( C_LABEL(prom_iface_vers) )] + be not_v2 + nop + + +/* Old sun4's pass our load address into %o0 instead of the prom + pointer. On sun4's you have to hard code the romvec pointer into + your code. Sun probably still does that because they don't even + trust their own "OpenBoot" specifications. +*/ + + sethi %hi(LOAD_ADDR), %g6 + subcc %o0, %g6, %g0 ! an old sun4? + be no_sun4_here + nop + + sethi %hi( C_LABEL(prom_iface_vers) ), %g1 + st %g0, [%g1 + %lo( C_LABEL(prom_iface_vers) )] + b not_v2 + nop + +found_v2: + or %g0, 0x2, %o5 + sethi %hi( C_LABEL(prom_iface_vers) ), %g1 + st %o5, [%g1 + %lo( C_LABEL(prom_iface_vers) )] + +not_v2: + +/* Get the machine type via the mysterious romvec node operations. + * Here we can find out whether we are on a sun4 sun4c, sun4m, or + * a sun4m. The "nodes" are set up as a bunch of n-ary trees which + * you can traverse to get information about devices and such. The + * information acquisition happens via the node-ops which are defined + * in the linux_openprom.h header file. Of particular interest is the + * 'nextnode(int node)' function as it does the smart thing when + * presented with a value of '0', it gives you the first node in the + * tree. These node integers probably offset into some internal prom + * pointer table the openboot has. It's completely undocumented, so + * I'm not about to go sifting through the prom address space, but may + * do so if I get suspicious enough. :-) + */ + + or %g0, %g7, %l1 + add %l1, 0x1c, %l1 + ld [%l1], %l0 + ld [%l0], %l0 + call %l0 + or %g0, %g0, %o0 ! next_node(0) = first_node + + sethi %hi( C_LABEL(cputypvar) ), %o1 ! first node has cpu-arch + or %o1, %lo( C_LABEL(cputypvar) ), %o1 + sethi %hi( C_LABEL(cputypval) ), %o2 ! information, the string + or %o2, %lo( C_LABEL(cputypval) ), %o2 + ld [%l1], %l0 ! 'compatibility' tells + ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where + call %l0 ! x is one of '', 'c', 'm', + nop ! 'd' or 'e'. %o2 holds pointer + ! to a buf where above string + ! will get stored by the prom. + + sethi %hi( C_LABEL(cputypval) ), %o2 ! better safe than sorry + or %o2, %lo( C_LABEL(cputypval) ), %o2 + ldub [%o2 + 0x4], %o0 + subcc %o0, 'c', %g0 ! we already know we are not + be is_sun4c ! on a plain sun4 because of + nop ! the check for 0x4000 in %o0 + subcc %o0, 'm', %g0 ! at start: + be is_sun4m + nop + b no_sun4d_here ! god bless the person who + nop ! tried to run this on sun4d + +is_sun4m: +is_sun4c: ! OK, this is a sun4c, yippie + or %g0, %g7, %g6 ! load up the promvec offsets + sethi %hi(prom_magic), %g5 ! magic mushroom :> + st %g6, [%g5 + %lo(prom_magic)] + add %g7, 0x4, %g6 + sethi %hi(prom_rom_vers), %g5 + st %g6, [%g5 + %lo(prom_rom_vers)] + add %g7, 0x8, %g6 + sethi %hi(prom_pluginvers), %g5 + st %g6, [%g5 + %lo(prom_pluginvers)] + add %g7, 0xc, %g6 + sethi %hi(prom_revision), %g5 + st %g6, [%g5 + %lo(prom_revision)] + add %g7, 0x10, %g6 + sethi %hi(prom_v0mem_desc), %g5 + st %g6, [%g5 + %lo(prom_v0mem_desc)] + add %g7, 0x1c, %g6 + sethi %hi(prom_nodefuncs), %g5 + st %g6, [%g5 + %lo(prom_nodefuncs)] + add %g7, 0x68, %g6 + sethi %hi(prom_printf), %g5 + st %g6, [%g5 + %lo(prom_printf)] + add %g7, 0x6c, %g6 + sethi %hi(prom_abort), %g5 + st %g6, [%g5 + %lo(prom_abort)] + add %g7, 0x74, %g6 + sethi %hi(prom_halt), %g5 + st %g6, [%g5 + %lo(prom_halt)] + add %g7, 0x78, %g6 + sethi %hi(prom_sync), %g5 + st %g6, [%g5 + %lo(prom_sync)] + add %g7, 0x7c, %g6 + sethi %hi(prom_eval), %g5 + st %g6, [%g5 + %lo(prom_eval)] + add %g7, 0x80, %g6 + sethi %hi(prom_v0bootline), %g6 + st %g6, [%g5 + %lo(prom_v0bootline)] + + +/* That was easy, now lets try to print some message on the screen. + * We don't have to worry about bad address translations when the prom + * addresses our pointers because our pointers are at 0x0-kern_size + * as the prom expects. + */ + +/* paul@sfe.com.au */ +/* V3 doesn't have printf.. And I don't really feel like doing the formatting + * myself.. So we miss out on some messages (for now). + */ + ld [%g7 + 0x4], %o0 + subcc %o3, 0x3, %g0 + be v3_bootmsg + nop + + sethi %hi(boot_msg), %o0 + or %o0, %lo(boot_msg), %o0 + sethi %hi(prom_printf), %o1 + ld [%o1 + %lo(prom_printf)], %o1 + ld [%o1], %o1 + call %o1 ! print boot message #1 + nop + + sethi %hi(pstring1), %o0 + or %o0, %lo(pstring1), %o0 + sethi %hi(prom_printf), %o2 + ld [%o2 + %lo(prom_printf)], %o2 + ld [%o2], %o2 + sethi %hi(prom_magic), %o1 + ld [%o1 + %lo(prom_magic)], %o1 + ld [%o1], %o1 + call %o2 + nop + + sethi %hi(pstring2), %o0 + or %o0, %lo(pstring2), %o0 + sethi %hi(prom_printf), %o2 + ld [%o2 + %lo(prom_printf)], %o2 + ld [%o2], %o2 + sethi %hi( C_LABEL(prom_iface_vers) ), %o1 + ld [%o1 + %lo( C_LABEL(prom_iface_vers) )], %o1 + ld [%o1], %o1 + call %o2 + nop + + b rest_of_boot + nop + +v3_bootmsg: + ld [%g7 + 0x94], %o0 + ld [%o0], %o0 + sethi %hi(boot_msg), %o1 + or %o1, %lo(boot_msg), %o1 + mov BOOT_MSG_LEN, %o2 + ld [%g7 + 0xb8], %o4 + call %o4 + nop + + ld [%g7 + 0x94], %o0 + ld [%o0], %o0 + sethi %hi(boot_msg2), %o1 + or %o1, %lo(boot_msg2), %o1 + mov BOOT_MSG2_LEN, %o2 + ld [%g7 + 0xb8], %o4 + call %o4 + nop + b rest_of_boot + nop + + +no_sun4_here: + ld [%g7 + 0x68], %o1 + set sun4_notsup, %o0 + call %o1 + nop + +rest_of_boot: + or %g0, PAGE_SHIFT, %g5 + + sethi %hi(AC_CONTEXT), %g1 ! kernel context, safe now + ! the only valid context + ! until we call paging_init() + stba %g0, [%g1] ASI_CONTROL + + +/* I make the kernel image sit in memory relative to 0x0 with the text + * starting at 0x4000. Now it looks like the way memory is set in Linux + * on an ix86. + */ + +/* Uh, oh, interrupt time. This crap is real confusing. What I want to do is + * clear all interrupts, map the interrupt enable register which in effect + * enables non-maskable interrupts (or NMI's). Actually we take no interrupts + * until we frob with the %tbr (trap base register) which the prom has set + * to all its routines which allows some sanity during bootup. + */ + + sethi %hi(IE_reg_addr), %l0 + or %l0, %lo(IE_reg_addr), %l0 + + set 0xf4000000, %l3 + sethi %hi(INT_ENABLE_REG_PHYSADR), %l2 + or %l2, %lo(INT_ENABLE_REG_PHYSADR), %l2 + srl %l2, %g5, %l2 + or %l2, %l3, %l1 + +#ifndef CONFIG_SRMMU + sta %l1, [%l0] ASI_PTE +#endif + + or %g0, 0x1, %l1 + stb %l1, [%l0] + + +/* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's + * show-time! + */ + + sethi %hi(1f), %g1 + or %g1, %lo(1f), %g1 + jmp %g1 + nop + + .align 4 +1: sethi %hi( C_LABEL(cputyp) ), %o0 + st %g4, [%o0 + %lo( C_LABEL(cputyp) )] + + sethi %hi( C_LABEL(pgshift) ), %o0 + st %g5, [%o0 + %lo( C_LABEL(pgshift) )] + + mov 1, %o0 + sll %o0, %g5, %g5 + sethi %hi( C_LABEL(nbpg) ), %o0 + st %g5, [%o0 + %lo( C_LABEL(nbpg) )] + + sub %g5, 1, %g5 + sethi %hi( C_LABEL(pgofset) ), %o0 + st %g5, [%o0 + %lo( C_LABEL(pgofset) )] + + + rd %psr, %g3 + andn %g3, PSR_ET, %g3 + wr %g3, 0x0, %psr ! make sure traps are off + ! before we play around + WRITE_PAUSE ! no guarantees until 3 insns + + + wr %g0, 0x0, %wim ! magical invalid window reg + WRITE_PAUSE ! see above + +/* I keep the timer interrupt on so that BogoMIPS works and the prom + * keeps updating its "jiffies" counter. 100HZ clock on sparcstations. + */ + +/* If gas wasn't so dumb, I could use or'd macros in this next + * write. ;-( like this (PSR_PS | PSR_S | PSR_PIL)... + */ + + sethi %hi(PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2 + or %g2, %lo(PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2 + wr %g2, 0x0, %psr + WRITE_PAUSE + + wr %g0, 0x2, %wim ! window 1 invalid + WRITE_PAUSE + + or %g0, 0x1, %g1 + sethi %hi( C_LABEL(current) + THREAD_WIM), %g2 + st %g1, [%g2 + %lo( C_LABEL(current) + THREAD_WIM)] + +/* I want a kernel stack NOW! */ + + set ( C_LABEL(init_user_stack) + 4092 - 96 - 80), %fp + set ( C_LABEL(init_user_stack) + 4092), %sp + +/* now out stack is set up similarly to the way it is on the i386 */ + + rd %psr, %l0 + wr %l0, PSR_ET, %psr + WRITE_PAUSE + +/* + * Maybe the prom zeroes out our BSS section, maybe it doesn't. I certainly + * don't know, do you? + */ + + set C_LABEL(edata) , %o0 + set C_LABEL(end) , %o1 + sub %o1, %o0, %g2 + sethi %hi( C_LABEL(kernel_bss_len) ), %g3 + st %g2, [%g3 + %lo( C_LABEL(kernel_bss_len) )] + sethi %hi( C_LABEL(trapbase) ), %g3 + or %g3, %lo( C_LABEL(trapbase) ), %g3 + sethi %hi( C_LABEL(etext) ), %g4 + or %g4, %lo( C_LABEL(etext) ), %g4 + sub %g4, %g3, %g2 + sethi %hi( C_LABEL(kernel_text_len) ), %g3 + st %g2, [%g3 + %lo( C_LABEL(kernel_text_len) )] + sethi %hi( C_LABEL(etext) ), %g4 + or %g4, %lo( C_LABEL(etext) ), %g4 + sethi %hi( C_LABEL(edata) ), %g3 + or %g3, %lo( C_LABEL(edata) ), %g3 + sub %g3, %g4, %g2 + sethi %hi( C_LABEL(kernel_data_len) ), %g3 + st %g2, [%g3 + %lo( C_LABEL(kernel_data_len) )] + or %g0, %g0, %g1 + +1: + st %g0, [%o0] + add %o0, 0x4, %o0 + subcc %o0, %o1, %g0 + bl 1b + nop + +/* Compute NWINDOWS and stash it away. Now uses %wim trick explained + * in the V8 manual. Ok, this method seems to work, sparc is cool... + */ + + sethi %hi(0xffffffff), %g1 + rd %wim, %g2 ! save current value + or %g1, %lo(0xffffffff), %g1 + wr %g1, 0x0, %wim + rd %wim, %g1 ! get remaining mask + wr %g2, 0x0, %wim ! restore old value + WRITE_PAUSE + + or %g0, 0x0, %g3 + +1: srl %g1, 0x1, %g1 ! shift until highest + subcc %g1, 0x0, %g0 ! bit set + bne 1b + add %g3, 0x1, %g3 + sethi %hi( C_LABEL(nwindows) ), %g4 + st %g3, [%g4 + %lo( C_LABEL(nwindows) )] ! store final value + sub %g3, 0x1, %g3 + sethi %hi( C_LABEL(nwindowsm1) ), %g4 + st %g3, [%g4 + %lo( C_LABEL(nwindowsm1) )] + + +/* Here we go */ + +#ifndef CONFIG_SUN4M + /* paul@sfe.com.au */ + /* Look into traps later :( */ + set C_LABEL(trapbase), %g3 + wr %g3, 0x0, %tbr + WRITE_PAUSE +#endif + + +/* First we call init_prom() to set up romvec, then off to start_kernel() */ +/* XXX put this in arch_init() */ + + sethi %hi( C_LABEL(prom_vector_p) ), %g5 + call C_LABEL(init_prom) + ld [%g5 + %lo( C_LABEL(prom_vector_p) )], %o0 /* delay slot */ + + call C_LABEL(start_kernel) + nop + + call halt_me + nop + +/* There, happy now adrian? */ + +no_sun4d_here: + ld [%g7 + 0x68], %o1 + set sun4d_notsup, %o0 + call %o1 + nop + b halt_me + nop + +halt_me: + ld [%g7 + 0x74], %o0 + call %o0 ! get us out of here... + nop ! apparently solaris is better + + .data + .align 4 + +/* + * Fill up the prom vector, note in particular the kind first element, + * no joke. I don't need all of them in here as the entire prom vector + * gets initialized in c-code so all routines can use it. + */ + + .globl C_LABEL(prom_vector_p) + +C_LABEL(prom_vector_p): .skip 4 +prom_magic: .skip 4 ! magic mushroom, beware... +prom_rom_vers: .skip 4 ! interface version (v0 or v2) +prom_pluginvers: .skip 4 ! XXX help help help ??? +prom_revision: .skip 4 ! PROM revision (ie. 1.4) +prom_halt: .skip 4 ! void halt(void) solaris friend +prom_eval: .skip 4 ! void eval(int len, char* string) +prom_v0bootline: .skip 4 ! boot command line +prom_v0mem_desc: .skip 4 ! V0 memory descriptor list ptr. +prom_nodefuncs: .skip 4 ! Magical Node functions +prom_printf: .skip 4 ! minimal printf() + +/* The prom_abort pointer MUST be mapped in all contexts, because if you + * don't then if a user process is running when you press the abort key + * sequence, all sorts of bad things can happen + */ + +prom_abort: .skip 4 ! L1-A magic cookie + ! must be mapped in ALL contexts + +/* prom_sync is a place where the kernel should place a pointer to a kernel + * function that when called will sync all pending information to the drives + * and then promptly return. If the kernel gets aborted with 'L1-A' one can + * give the 'sync' command to the boot prompt and this magic cookie gets + * executed. Nice feature eh? + */ + +prom_sync: .skip 4 ! hook in prom for sync func + + .align 4 + +/* We calculate the following at boot time, window fills/spills and trap entry + * code uses these to keep track of the register windows. + */ + + .globl C_LABEL(nwindows) + .globl C_LABEL(nwindowsm1) +C_LABEL(nwindows): .skip 4 +C_LABEL(nwindowsm1): .skip 4 + + .align 4 +/* Boot time privileged register values, plus magic %o2 value */ + + .globl C_LABEL(boot_wim) + .globl C_LABEL(boot_psr) + .globl C_LABEL(boot_tbr) + .globl C_LABEL(boot_smp_ptr) +C_LABEL(boot_wim): .skip 4 +C_LABEL(boot_psr): .skip 4 +C_LABEL(boot_tbr): .skip 4 +C_LABEL(boot_smp_ptr): .skip 4 + + + .align 4 +/* Miscellaneous pieces of information saved at kernel startup. */ + .globl C_LABEL(kernel_text_len) + .globl C_LABEL(kernel_data_len) + .globl C_LABEL(kernel_bss_len) +C_LABEL(kernel_text_len): .word 0 +C_LABEL(kernel_data_len): .word 0 +C_LABEL(kernel_bss_len): .word 0 + +/* These are for page alignment/offset information as they change from + machine to machine. +*/ + + .globl C_LABEL(pgshift) + .globl C_LABEL(nbpg) + .globl C_LABEL(pgofset) + + .align 4 +C_LABEL(pgshift): + .word 1 +C_LABEL(nbpg): + .word 1 +C_LABEL(pgofset): + .word 1 + +/* Just to get the kernel through the compiler for now */ + .globl C_LABEL(swapper_pg_dir), C_LABEL(pg0) + .globl C_LABEL(empty_bad_page) + .globl C_LABEL(empty_bad_page_table) + .globl C_LABEL(empty_zero_page) + .globl C_LABEL(floppy_track_buffer) +C_LABEL(floppy_track_buffer): + .fill 512*2*36,1,0 + + .align 4 +C_LABEL(swapper_pg_dir): .skip 0x1000 +C_LABEL(pg0): .skip 0x1000 +C_LABEL(empty_bad_page): .skip 0x1000 +C_LABEL(empty_bad_page_table): .skip 0x1000 +C_LABEL(empty_zero_page): .skip 0x1000 + + .align 4 +diagstr: .asciz "DIAG\n" + .align 4 diff --git a/arch/sparc/kernel/idprom.c b/arch/sparc/kernel/idprom.c new file mode 100644 index 000000000..c12f7467b --- /dev/null +++ b/arch/sparc/kernel/idprom.c @@ -0,0 +1,183 @@ +/* idprom.c: Routines to load the idprom into kernel addresses and + * interpret the data contained within. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <linux/kernel.h> + +#include <asm/types.h> +#include <asm/openprom.h> +#include <asm/idprom.h> + +struct idp_struct idprom; +extern int num_segmaps, num_contexts; + +void get_idprom(void) +{ + char* idp_addr; + char* knl_idp_addr; + int i; + + idp_addr = (char *)IDPROM_ADDR; + knl_idp_addr = (char *) &idprom; + + for(i = 0; i<IDPROM_SIZE; i++) + *knl_idp_addr++ = *idp_addr++; + + return; +} + +/* find_vac_size() returns the number of bytes in the VAC (virtual + * address cache) on this machine. + */ + +int +find_vac_size(void) +{ + int vac_prop_len; + int vacsize = 0; + int node_root; + + node_root = (*(romvec->pv_nodeops->no_nextnode))(0); + + vac_prop_len = (*(romvec->pv_nodeops->no_proplen))(node_root, "vac-size"); + + if(vac_prop_len != -1) + { + (*(romvec->pv_nodeops->no_getprop))(node_root, "vac-size", (char *) &vacsize); + return vacsize; + } + else + { + + /* The prom node functions can't help, do it via idprom struct */ + switch(idprom.id_machtype) + { + case 0x51: + case 0x52: + case 0x53: + case 0x54: + case 0x55: + case 0x56: + case 0x57: + return 65536; + default: + return -1; + } + }; +} + +/* find_vac_linesize() returns the size in bytes of the VAC linesize */ + +int +find_vac_linesize(void) +{ + int vac_prop_len; + int vaclinesize = 0; + int node_root; + + node_root = (*(romvec->pv_nodeops->no_nextnode))(0); + + vac_prop_len = (*(romvec->pv_nodeops->no_proplen))(node_root, "vac-linesize"); + + if(vac_prop_len != -1) + { + (*(romvec->pv_nodeops->no_getprop))(node_root, "vac-linesize", + (char *) &vaclinesize); + return vaclinesize; + } + else + { + + /* The prom node functions can't help, do it via idprom struct */ + switch(idprom.id_machtype) + { + case 0x51: + case 0x52: + case 0x53: + case 0x54: + return 16; + case 0x55: + case 0x56: + case 0x57: + return 32; + default: + return -1; + } + }; +} + +int +find_vac_hwflushes(void) +{ + register int len, node_root; + int tmp1, tmp2; + + node_root = (*(romvec->pv_nodeops->no_nextnode))(0); + + len = (*(romvec->pv_nodeops->no_proplen))(node_root, "vac_hwflush"); + +#ifdef DEBUG_IDPROM + printf("DEBUG: find_vac_hwflushes: proplen vac_hwflush=0x%x\n", len); +#endif + + /* Sun 4/75 has typo in prom_node, it's a dash instead of an underscore + * in the property name. :-( + */ + len |= (*(romvec->pv_nodeops->no_proplen))(node_root, "vac-hwflush"); + +#ifdef DEBUG_IDPROM + printf("DEBUG: find_vac_hwflushes: proplen vac-hwflush=0x%x\n", len); +#endif + + len = (*(romvec->pv_nodeops->no_getprop))(node_root,"vac_hwflush", + (char *) &tmp1); + if(len != 4) tmp1=0; + + len = (*(romvec->pv_nodeops->no_getprop))(node_root, "vac-hwflush", + (char *) &tmp2); + if(len != 4) tmp2=0; + + + return (tmp1|tmp2); +} + +void +find_mmu_num_segmaps(void) +{ + register int root_node, len; + + root_node = (*(romvec->pv_nodeops->no_nextnode))(0); + + len = (*(romvec->pv_nodeops->no_getprop))(root_node, "mmu-npmg", + (char *) &num_segmaps); + +#ifdef DEBUG_MMU + printf("find_mmu_num_segmaps: property length = %d\n", len); +#endif + + if(len != 4) num_segmaps = 128; + + return; +} + +void +find_mmu_num_contexts(void) +{ + register int root_node, len; + + root_node = (*(romvec->pv_nodeops->no_nextnode))(0); + + len = (*(romvec->pv_nodeops->no_getprop))(root_node, "mmu-nctx", + (char *) &num_contexts); + +#ifdef DEBUG_MMU + printf("find_mmu_num_contexts: property length = %d\n", len); +#endif + + if(len != 4) num_contexts = 8; + + return; +} + diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c new file mode 100644 index 000000000..effa6c25e --- /dev/null +++ b/arch/sparc/kernel/ioport.c @@ -0,0 +1,12 @@ +/* ioport.c: I/O access on the Sparc. Work in progress.. Most of the things + * in this file are for the sole purpose of getting the kernel + * through the compiler. :-) + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/ioport.h> diff --git a/arch/sparc/kernel/irq.c b/arch/sparc/kernel/irq.c new file mode 100644 index 000000000..5dcaf1971 --- /dev/null +++ b/arch/sparc/kernel/irq.c @@ -0,0 +1,335 @@ +/* arch/sparc/kernel/irq.c: Interrupt request handling routines. On the + * Sparc the IRQ's are basically 'cast in stone' + * and you are supposed to probe the prom's device + * node trees to find out who's got which IRQ. + * + * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) + * + */ + +/* + * IRQ's are in fact implemented a bit like signal handlers for the kernel. + * The same sigaction struct is used, and with similar semantics (ie there + * is a SA_INTERRUPT flag etc). Naturally it's not a 1:1 relation, but there + * are similarities. + * + * sa_handler(int irq_NR) is the default function called (0 if no). + * sa_mask is horribly ugly (I won't even mention it) + * sa_flags contains various info: SA_INTERRUPT etc + * sa_restorer is the unused + */ + +#include <linux/config.h> +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/linkage.h> +#include <linux/kernel_stat.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/psr.h> +#include <asm/vaddrs.h> +#include <asm/clock.h> +#include <asm/openprom.h> + +#define DEBUG_IRQ + +void disable_irq(unsigned int irq_nr) +{ + unsigned long flags; + unsigned char *int_reg; + + save_flags(flags); + cli(); + + /* We have mapped the irq enable register in head.S and all we + * have to do here is frob the bits. + */ + + int_reg = (unsigned char *) IRQ_ENA_ADR; + + switch(irq_nr) + { + case 1: + *int_reg = ((*int_reg) & (~(0x02))); + break; + case 4: + *int_reg = ((*int_reg) & (~(0x04))); + break; + case 6: + *int_reg = ((*int_reg) & (~(0x08))); + break; + case 8: + *int_reg = ((*int_reg) & (~(0x10))); + break; + case 10: + *int_reg = ((*int_reg) & (~(0x20))); + break; + case 14: + *int_reg = ((*int_reg) & (~(0x80))); + break; + default: + printk("AIEEE, Illegal interrupt disable requested irq=%d\n", + (int) irq_nr); + break; + }; + + restore_flags(flags); + return; +} + +void enable_irq(unsigned int irq_nr) +{ + unsigned long flags; + unsigned char *int_reg; + + save_flags(flags); + cli(); + + /* We have mapped the irq enable register in head.S and all we + * have to do here is frob the bits. + */ + + int_reg = (unsigned char *) IRQ_ENA_ADR; + +#ifdef DEBUG_IRQ + printk(" --- Enabling IRQ level %d ---\n", irq_nr); +#endif + + switch(irq_nr) + { + case 1: + *int_reg = ((*int_reg) | 0x02); + break; + case 4: + *int_reg = ((*int_reg) | 0x04); + break; + case 6: + *int_reg = ((*int_reg) | 0x08); + break; + case 8: + *int_reg = ((*int_reg) | 0x10); + break; + case 10: + *int_reg = ((*int_reg) | 0x20); + break; + case 14: + *int_reg = ((*int_reg) | 0x80); + break; + default: + printk("AIEEE, Illegal interrupt enable requested irq=%d\n", + (int) irq_nr); + break; + }; + + restore_flags(flags); + + return; +} + +/* + * Initial irq handlers. + */ +struct irqaction { + void (*handler)(int, struct pt_regs *); + unsigned long flags; + unsigned long mask; + const char *name; +}; + +static struct irqaction irq_action[16] = { + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL }, + { NULL, 0, 0, NULL }, { NULL, 0, 0, NULL } +}; + + +int get_irq_list(char *buf) +{ + int i, len = 0; + struct irqaction * action = irq_action; + + for (i = 0 ; i < 16 ; i++, action++) { + if (!action->handler) + continue; + len += sprintf(buf+len, "%2d: %8d %c %s\n", + i, kstat.interrupts[i], + (action->flags & SA_INTERRUPT) ? '+' : ' ', + action->name); + } + return len; +} + +void free_irq(unsigned int irq) +{ + struct irqaction * action = irq + irq_action; + unsigned long flags; + + if (irq > 14) { /* 14 irq levels on the sparc */ + printk("Trying to free IRQ %d\n", irq); + return; + } + if (!action->handler) { + printk("Trying to free free IRQ%d\n", irq); + return; + } + save_flags(flags); + cli(); + disable_irq(irq); + action->handler = NULL; + action->flags = 0; + action->mask = 0; + action->name = NULL; + restore_flags(flags); +} + +#if 0 +static void handle_nmi(struct pt_regs * regs) +{ + printk("NMI, probably due to bus-parity error.\n"); + printk("PC=%08lx, SP=%08lx\n", regs->pc, regs->sp); +} +#endif + +void unexpected_irq(int irq, struct pt_regs * regs) +{ + int i; + + printk("IO device interrupt, irq = %d\n", irq); + printk("PC = %08lx NPC = %08lx SP=%08lx\n", regs->pc, + regs->npc, regs->sp); + printk("Expecting: "); + for (i = 0; i < 16; i++) + if (irq_action[i].handler) + printk("[%s:%d] ", irq_action[i].name, i); + printk("AIEEE\n"); +} + +static inline void handler_irq(int irq, struct pt_regs * regs) +{ + struct irqaction * action = irq + irq_action; + + if (!action->handler) { + unexpected_irq(irq, regs); + return; + } + action->handler(irq, regs); +} + +/* + * do_IRQ handles IRQ's that have been installed without the + * SA_INTERRUPT flag: it uses the full signal-handling return + * and runs with other interrupts enabled. All relatively slow + * IRQ's should use this format: notably the keyboard/timer + * routines. + */ +asmlinkage void do_IRQ(int irq, struct pt_regs * regs) +{ + struct irqaction *action = irq + irq_action; + + kstat.interrupts[irq]++; + action->handler(irq, regs); + return; +} + +/* + * Since we need to special things to clear up the clock chip around + * the do_timer() call we have a special version of do_IRQ for the + * level 14 interrupt which does these things. + */ + +asmlinkage void do_sparc_timer(int irq, struct pt_regs * regs) +{ + struct irqaction *action = irq + irq_action; + register volatile int clear; + + kstat.interrupts[irq]++; + + /* I do the following already in the entry code, better safe than + * sorry for now. Reading the limit register clears the interrupt. + */ + clear = TIMER_STRUCT->timer_limit14; + + action->handler(irq, regs); + return; +} + +/* + * do_fast_IRQ handles IRQ's that don't need the fancy interrupt return + * stuff - the handler is also running with interrupts disabled unless + * it explicitly enables them later. + */ +asmlinkage void do_fast_IRQ(int irq) +{ + kstat.interrupts[irq]++; + printk("Got FAST_IRQ number %04lx\n", (long unsigned int) irq); + return; +} + +extern int first_descent; +extern void probe_clock(int); + +int request_irq(unsigned int irq, void (*handler)(int, struct pt_regs *), + unsigned long irqflags, const char * devname) +{ + struct irqaction *action; + unsigned long flags; + + if(irq > 14) /* Only levels 1-14 are valid on the Sparc. */ + return -EINVAL; + + if(irq == 0) /* sched_init() requesting the timer IRQ */ + { + irq = 14; + probe_clock(first_descent); + } + + action = irq + irq_action; + + if(action->handler) + return -EBUSY; + + if(!handler) + return -EINVAL; + + save_flags(flags); + + cli(); + + action->handler = handler; + action->flags = irqflags; + action->mask = 0; + action->name = devname; + + enable_irq(irq); + + restore_flags(flags); + + return 0; +} + +unsigned int probe_irq_on (void) +{ + unsigned int irqs = 0; + + return irqs; +} + +int probe_irq_off (unsigned int irqs) +{ + unsigned int i = 0; + + return i; +} + +void init_IRQ(void) +{ + return; +} diff --git a/arch/sparc/kernel/probe.c b/arch/sparc/kernel/probe.c new file mode 100644 index 000000000..462556164 --- /dev/null +++ b/arch/sparc/kernel/probe.c @@ -0,0 +1,432 @@ +/* probe.c: Preliminary device tree probing routines... + + Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) +*/ + +#include <linux/kernel.h> +#include <linux/string.h> +#include <asm/vac-ops.h> +#include <asm/io.h> +#include <asm/vaddrs.h> +#include <asm/param.h> +#include <asm/clock.h> +#include <asm/system.h> + +/* #define DEBUG_PROBING */ + +char promstr_buf[64]; /* overkill */ +unsigned int promint_buf[1]; + +extern int prom_node_root; +extern int num_segmaps, num_contexts; + +extern int node_get_sibling(int node); +extern int node_get_child(int node); +extern char* get_str_from_prom(int node, char* name, char* value); +extern unsigned int* get_int_from_prom(int node, char* name, unsigned int *value); + +int first_descent; + +/* Cpu-type information and manufacturer strings */ + + +struct cpu_iu_info { + int psr_impl; + int psr_vers; + char* cpu_name; /* should be enough I hope... */ +}; + +struct cpu_fp_info { + int psr_impl; + int fp_vers; + char* fp_name; +}; + +struct cpu_fp_info linux_sparc_fpu[] = { + { 0, 0, "Fujitsu MB86910 or Weitek WTL1164/5"}, + { 0, 1, "Fujitsu MB86911 or Weitek WTL1164/5"}, + { 0, 2, "LSI Logic L64802 or Texas Instruments ACT8847"}, + { 0, 3, "Weitek WTL3170/2"}, + { 0, 4, "Lsi Logic/Meiko L64804"}, + { 0, 5, "reserved"}, + { 0, 6, "reserved"}, + { 0, 7, "No FPU"}, + { 1, 0, "Lsi Logic L64812 or Texas Instruments ACT8847"}, + { 1, 1, "Lsi Logic L64814"}, + { 1, 2, "Texas Instruments TMS390-C602A"}, + { 1, 3, "Weitek WTL3171"}, + { 1, 4, "reserved"}, + { 1, 5, "reserved"}, + { 1, 6, "reserved"}, + { 1, 7, "No FPU"}, + { 2, 0, "BIT B5010 or B5110/20 or B5210"}, + { 2, 1, "reserved"}, + { 2, 2, "reserved"}, + { 2, 3, "reserved"}, + { 2, 4, "reserved"}, + { 2, 5, "reserved"}, + { 2, 6, "reserved"}, + { 2, 7, "No FPU"}, + { 5, 0, "Matsushita MN10501"}, + { 5, 1, "reserved"}, + { 5, 2, "reserved"}, + { 5, 3, "reserved"}, + { 5, 4, "reserved"}, + { 5, 5, "reserved"}, + { 5, 6, "reserved"}, + { 5, 7, "No FPU"}, +}; + +struct cpu_iu_info linux_sparc_chips[] = { + { 0, 0, "Fujitsu Microelectronics, Inc. - MB86900/1A"}, + { 1, 0, "Cypress CY7C601"}, + { 1, 1, "LSI Logic Corporation - L64811"}, + { 1, 3, "Cypress CY7C611"}, + { 2, 0, "Bipolar Integrated Technology - B5010"}, + { 3, 0, "LSI Logic Corporation - unknown-type"}, + { 4, 0, "Texas Instruments, Inc. - unknown"}, + { 4, 1, "Texas Instruments, Inc. - Sparc Classic"}, + { 4, 2, "Texas Instruments, Inc. - unknown"}, + { 4, 3, "Texas Instruments, Inc. - unknown"}, + { 4, 4, "Texas Instruments, Inc. - unknown"}, + { 4, 5, "Texas Instruments, Inc. - unknown"}, + { 5, 0, "Matsushita - MN10501"}, + { 6, 0, "Philips Corporation - unknown"}, + { 7, 0, "Harvest VLSI Design Center, Inc. - unknown"}, + { 8, 0, "Systems and Processes Engineering Corporation (SPEC)"}, + { 9, 0, "UNKNOWN CPU-VENDOR/TYPE"}, + { 0xa, 0, "UNKNOWN CPU-VENDOR/TYPE"}, + { 0xb, 0, "UNKNOWN CPU-VENDOR/TYPE"}, + { 0xc, 0, "UNKNOWN CPU-VENDOR/TYPE"}, + { 0xd, 0, "UNKNOWN CPU-VENDOR/TYPE"}, + { 0xe, 0, "UNKNOWN CPU-VENDOR/TYPE"}, + { 0xf, 0, "UNKNOWN CPU-VENDOR/TYPE"}, +}; + +char *sparc_cpu_type = "cpu-oops"; +char *sparc_fpu_type = "fpu-oops"; + +/* various Virtual Address Cache parameters we find at boot time... */ + +extern int vac_size, vac_linesize, vac_do_hw_vac_flushes; +extern int vac_entries_per_context, vac_entries_per_segment; +extern int vac_entries_per_page; + +extern int find_vac_size(void); +extern int find_vac_linesize(void); +extern int find_vac_hwflushes(void); +extern void find_mmu_num_segmaps(void); +extern void find_mmu_num_contexts(void); + +void +probe_cpu(void) +{ + register int psr_impl=0; + register int psr_vers = 0; + register int fpu_vers = 0; + register int i = 0; + unsigned int tmp_fsr; + + &tmp_fsr; /* GCC grrr... */ + + __asm__("rd %%psr, %0\n\t" + "mov %0, %1\n\t" + "srl %0, 28, %0\n\t" + "srl %1, 24, %1\n\t" + "and %0, 0xf, %0\n\t" + "and %1, 0xf, %1\n\t" : + "=r" (psr_impl), + "=r" (psr_vers) : + "0" (psr_impl), + "1" (psr_vers)); + + + __asm__("st %%fsr, %1\n\t" + "ld %1, %0\n\t" + "srl %0, 17, %0\n\t" + "and %0, 0x7, %0\n\t" : + "=r" (fpu_vers), + "=m" (tmp_fsr) : + "0" (fpu_vers), + "1" (tmp_fsr)); + + printk("fpu_vers: %d ", fpu_vers); + printk("psr_impl: %d ", psr_impl); + printk("psr_vers: %d \n\n", psr_vers); + + for(i = 0; i<23; i++) + { + if(linux_sparc_chips[i].psr_impl == psr_impl) + if(linux_sparc_chips[i].psr_vers == psr_vers) + { + sparc_cpu_type = linux_sparc_chips[i].cpu_name; + break; + } + } + + if(i==23) + { + printk("No CPU type! You lose\n"); + printk("DEBUG: psr.impl = 0x%x psr.vers = 0x%x\n", psr_impl, + psr_vers); + return; + } + + for(i = 0; i<32; i++) + { + if(linux_sparc_fpu[i].psr_impl == psr_impl) + if(linux_sparc_fpu[i].fp_vers == fpu_vers) + { + sparc_fpu_type = linux_sparc_fpu[i].fp_name; + break; + } + } + + if(i == 32) + { + printk("No FPU type! You don't completely lose though...\n"); + printk("DEBUG: psr.impl = 0x%x fsr.vers = 0x%x\n", psr_impl, fpu_vers); + sparc_fpu_type = linux_sparc_fpu[31].fp_name; + } + + printk("CPU: %s \n", sparc_cpu_type); + printk("FPU: %s \n", sparc_fpu_type); + + return; +} + +void +probe_vac(void) +{ + register unsigned int x,y; + +#ifndef CONFIG_SRMMU + vac_size = find_vac_size(); + vac_linesize = find_vac_linesize(); + vac_do_hw_vac_flushes = find_vac_hwflushes(); + + /* Calculate various constants that make the cache-flushing code + * mode speedy. + */ + + vac_entries_per_segment = vac_entries_per_context = vac_size >> 12; + + for(x=0,y=vac_linesize; ((1<<x)<y); x++); + if((1<<x) != vac_linesize) printk("Warning BOGUS VAC linesize 0x%x", + vac_size); + + vac_entries_per_page = x; + + printk("Sparc VAC cache: Size=%d bytes Line-Size=%d bytes ... ", vac_size, + vac_linesize); + + /* Here we want to 'invalidate' all the software VAC "tags" + * just in case there is garbage in there. Then we enable it. + */ + + for(x=0x80000000, y=(x+vac_size); x<y; x+=vac_linesize) + __asm__("sta %0, [%1] %2" : : "r" (0), "r" (x), "n" (0x2)); + + x=enable_vac(); + printk("ENABLED\n"); +#endif + + return; +} + +void +probe_mmu(void) +{ + find_mmu_num_segmaps(); + find_mmu_num_contexts(); + + printk("MMU segmaps: %d MMU contexts: %d\n", num_segmaps, + num_contexts); + + return; +} + +void +probe_clock(int fchild) +{ + register int node, type; + register char *node_str; + + /* This will basically traverse the node-tree of the prom to see + * which timer chip is on this machine. + */ + + printk("Probing timer chip... "); + + type = 0; + for(node = fchild ; ; ) + { + node_str = get_str_from_prom(node, "model", promstr_buf); + if(strcmp(node_str, "mk48t02") == 0) + { + type = 2; + break; + } + + if(strcmp(node_str, "mk48t08") == 0) + { + type = 8; + break; + } + + node = node_get_sibling(node); + if(node == fchild) + { + printk("Aieee, could not find timer chip type\n"); + return; + } + } + + printk("Mostek %s\n", node_str); + printk("At OBIO address: 0x%x Virtual address: 0x%x\n", + (unsigned int) TIMER_PHYSADDR, (unsigned int) TIMER_STRUCT); + + mapioaddr((unsigned long) TIMER_PHYSADDR, + (unsigned long) TIMER_STRUCT); + + TIMER_STRUCT->timer_limit14=(((1000000/HZ) << 10) | 0x80000000); + + return; +} + + +void +probe_esp(register int esp_node) +{ + register int nd; + register char* lbuf; + + nd = node_get_child(esp_node); + + printk("\nProbing ESP:\n"); + lbuf = get_str_from_prom(nd, "name", promstr_buf); + + if(*get_int_from_prom(nd, "name", promint_buf) != 0) + printk("Node: 0x%x Name: %s\n", nd, lbuf); + + while((nd = node_get_sibling(nd)) != 0) { + lbuf = get_str_from_prom(nd, "name", promstr_buf); + printk("Node: 0x%x Name: %s\n", nd, lbuf); + } + + printk("\n"); + + return; +} + +void +probe_sbus(register int cpu_child_node) +{ + register int nd, savend; + register char* lbuf; + + nd = cpu_child_node; + + lbuf = (char *) 0; + + while((nd = node_get_sibling(nd)) != 0) { + lbuf = get_str_from_prom(nd, "name", promstr_buf); + if(strcmp(lbuf, "sbus") == 0) + break; + }; + + nd = node_get_child(nd); + + printk("Node: 0x%x Name: %s\n", nd, + get_str_from_prom(nd, "name", promstr_buf)); + + if(strcmp(lbuf, "esp") == 0) { + probe_esp(nd); + }; + + while((nd = node_get_sibling(nd)) != 0) { + printk("Node: 0x%x Name: %s\n", nd, + lbuf = get_str_from_prom(nd, "name", promstr_buf)); + + if(strcmp(lbuf, "esp") == 0) { + savend = nd; + probe_esp(nd); + nd = savend; + }; + }; + + printk("\n"); + return; +} + +extern unsigned long probe_memory(void); +extern struct sparc_phys_banks sp_banks[14]; +unsigned int phys_bytes_of_ram, end_of_phys_memory; + +void +probe_devices(void) +{ + register int nd, i; + register char* str; + + nd = prom_node_root; + + printk("PROBING DEVICES:\n"); + + str = get_str_from_prom(nd, "device_type", promstr_buf); + if(strcmp(str, "cpu") == 0) { + printk("Found CPU root prom device tree node.\n"); + } else { + printk("Root node in device tree was not 'cpu' cannot continue.\n"); + halt(); + }; + +#ifdef DEBUG_PROBING + printk("String address for d_type: 0x%x\n", (unsigned int) str); + printk("str[0] = %c str[1] = %c str[2] = %c \n", str[0], str[1], str[2]); +#endif + + str = get_str_from_prom(nd, "name", promstr_buf); + +#ifdef DEBUG_PROBING + printk("String address for name: 0x%x\n", (unsigned int) str); + printk("str[0] = %c str[1] = %c str[2] = %c \n", str[0], str[1], str[2]); +#endif + + printk("Name: %s \n", str); + + first_descent = nd = node_get_child(nd); + + +/* Ok, here will go a call to each specific device probe. We can + * call these now that we have the 'root' node and the child of + * this node to send to the routines. ORDER IS IMPORTANT! + */ + + probe_cpu(); + probe_vac(); + probe_mmu(); + phys_bytes_of_ram = probe_memory(); + + printk("Physical Memory: %d bytes\n", (int) phys_bytes_of_ram); + for(i=0; sp_banks[i].num_bytes != 0; i++) { + printk("Bank %d: base 0x%x bytes %d\n", i, + (unsigned int) sp_banks[i].base_addr, + (int) sp_banks[i].num_bytes); + end_of_phys_memory = sp_banks[i].base_addr + sp_banks[i].num_bytes; + } + + printk("PROM Root Child Node: 0x%x Name: %s \n", nd, + get_str_from_prom(nd, "name", promstr_buf)); + + while((nd = node_get_sibling(nd)) != 0) { + printk("Node: 0x%x Name: %s", nd, + get_str_from_prom(nd, "name", promstr_buf)); + printk("\n"); + }; + + printk("\nProbing SBUS:\n"); + probe_sbus(first_descent); + + return; +} diff --git a/arch/sparc/kernel/process.c b/arch/sparc/kernel/process.c new file mode 100644 index 000000000..679863ba3 --- /dev/null +++ b/arch/sparc/kernel/process.c @@ -0,0 +1,112 @@ +/* + * linux/arch/i386/kernel/process.c + * + * Copyright (C) 1995 Linus Torvalds + */ + +/* + * This file handles the architecture-dependent parts of process handling.. + */ + +#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/ldt.h> +#include <linux/user.h> +#include <linux/a.out.h> + +#include <asm/segment.h> +#include <asm/system.h> + +void ret_from_sys_call(void) { __asm__("nop"); } + +/* + * The idle loop on a i386.. + */ +asmlinkage int sys_idle(void) +{ + if (current->pid != 0) + return -EPERM; + + /* Map out the low memory: it's no longer needed */ + /* Sparc version RSN */ + + /* endless idle loop with no priority at all */ + current->counter = -100; + for (;;) { + schedule(); + } +} + +void hard_reset_now(void) +{ + halt(); +} + +void show_regs(struct pt_regs * regs) +{ + printk("\nSP: %08lx PC: %08lx NPC: %08lx\n", regs->sp, regs->pc, + regs->npc); +} + +/* + * Do necessary setup to start up a newly executed thread. + */ +void start_thread(struct pt_regs * regs, unsigned long sp, unsigned long fp) +{ + regs->sp = sp; + regs->fp = fp; +} + +/* + * Free current thread data structures etc.. + */ +void exit_thread(void) +{ + halt(); +} + +void flush_thread(void) +{ + halt(); +} + +void copy_thread(int nr, unsigned long clone_flags, unsigned long sp, struct task_struct * p, struct pt_regs * regs) +{ + struct pt_regs * childregs; + + childregs = ((struct pt_regs *) (p->kernel_stack_page + PAGE_SIZE)) - 1; + p->tss.usp = (unsigned long) childregs; + *childregs = *regs; + childregs->sp = sp; + p->tss.psr = regs->psr; /* for condition codes */ + return; +} + +/* + * fill in the user structure for a core dump.. + */ +void dump_thread(struct pt_regs * regs, struct user * dump) +{ + return; /* solaris does this enough */ +} + +asmlinkage int sys_fork(struct pt_regs regs) +{ + return do_fork(COPYVM | SIGCHLD, regs.sp, ®s); +} + +/* + * sys_execve() executes a new program. + */ +asmlinkage int sys_execve(struct pt_regs regs) +{ + halt(); + return 0; +} + diff --git a/arch/sparc/kernel/promops.c b/arch/sparc/kernel/promops.c new file mode 100644 index 000000000..b5c897b0d --- /dev/null +++ b/arch/sparc/kernel/promops.c @@ -0,0 +1,107 @@ +/* promops.c: Prom node tree operations and Prom Vector initialization + * initialization routines. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <linux/kernel.h> + +#include <asm/openprom.h> + +/* #define DEBUG_PROMOPS */ +#define MAX_PR_LEN 64 /* exotic hardware probably overshoots this */ + +int prom_node_root; /* initialized in init_prom */ + +extern struct linux_romvec *romvec; + +/* These two functions return and siblings and direct child descendents + * in the prom device tree respectively. + */ + +int +node_get_sibling(int node) +{ + return (*(romvec->pv_nodeops->no_nextnode))(node); +} + +int +node_get_child(int node) +{ + return (*(romvec->pv_nodeops->no_child))(node); +} + +/* The following routine is used during device probing to determine + * an integer value property about a (perhaps virtual) device. This + * could be anything, like the size of the mmu cache lines, etc. + * the default return value is -1 is the prom has nothing interesting. + */ + +unsigned int prom_int_null; + +unsigned int * +get_int_from_prom(int node, char *nd_prop, unsigned int *value) +{ + unsigned int pr_len; + + *value = &prom_int_null; /* duh, I was returning -1 as an unsigned int, prom_panic() */ + + pr_len = romvec->pv_nodeops->no_proplen(node, nd_prop); + if(pr_len > MAX_PR_LEN) + { +#ifdef DEBUG_PROMOPS + printk("Bad pr_len in promops -- node: %d nd_prop: %s pr_len: %d", + node, nd_prop, (int) pr_len); +#endif + return value; /* XXX */ + } + + romvec->pv_nodeops->no_getprop(node, nd_prop, (char *) value); + + return value; +} + + +/* This routine returns what is termed a property string as opposed + * to a property integer as above. This can be used to extract the + * 'type' of device from the prom. An example could be the clock timer + * chip type. By default you get returned a null string if garbage + * is returned from the prom. + */ + +char * +get_str_from_prom(int node, char *nd_prop, char *value) +{ + unsigned int pr_len; + + *value='\n'; + + pr_len = romvec->pv_nodeops->no_proplen(node, nd_prop); + if(pr_len > MAX_PR_LEN) + { +#ifdef DEBUG_PROMOPS + printk("Bad pr_len in promops -- node: %d nd_prop: %s pr_len: %d", + node, nd_prop, pr_len); +#endif + return value; /* XXX */ + } + + romvec->pv_nodeops->no_getprop(node, nd_prop, value); + value[pr_len] = 0; + + return value; +} + +/* This gets called from head.S upon bootup to initialize the + * prom vector pointer for the rest of the kernel. + */ + +void +init_prom(struct linux_romvec *r_ptr) +{ + romvec = r_ptr; + prom_node_root = romvec->pv_nodeops->no_nextnode(0); + prom_int_null = 0; + + return; +} diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c new file mode 100644 index 000000000..5ec5b56ba --- /dev/null +++ b/arch/sparc/kernel/setup.c @@ -0,0 +1,120 @@ +/* + * linux/arch/alpha/kernel/setup.c + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +/* + * bootup setup stuff.. + */ + +#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/ldt.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/tty.h> + +#include <asm/segment.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/openprom.h> /* for console registration + cheese */ + +extern void get_idprom(void); +extern void probe_devices(void); + +/* + * Gcc is hard to keep happy ;-) + */ +struct screen_info screen_info = { + 0, 0, /* orig-x, orig-y */ + { 0, 0, }, /* unused */ + 0, /* orig-video-page */ + 0, /* orig-video-mode */ + 80, /* orig-video-cols */ + 0,0,0, /* ega_ax, ega_bx, ega_cx */ + 25 /* orig-video-lines */ +}; + +/* At least I hide the sneaky floppy_track_buffer in my dirty assembly + * code. ;-) + */ + +unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end) +{ + return memory_start; +} + +/* Lame prom console routines, gets registered below. Thanks for the + * tip Linus. First comes the V0 prom routine, then the V3 version + * written by Paul Hatchman (paul@sfe.com.au). + */ + +void sparc_console_print(const char * p) +{ + unsigned char c; + + while ((c = *(p++)) != 0) + { + if (c == '\n') romvec->pv_putchar('\r'); + (*(romvec->pv_putchar))(c); + } + + return; + +} + +/* paul@sfe.com.au */ +/* V3 prom console printing routines */ +void sparc_console_print_v3 (const char *p) +{ + unsigned char c; + + while ((c = *(p++)) != 0) + { + if (c == '\n') romvec->pv_v2devops.v2_dev_write + ((*romvec->pv_v2bootargs.fd_stdout), "\r", 1); + romvec->pv_v2devops.v2_dev_write + ((*romvec->pv_v2bootargs.fd_stdout), &c, 1); + } + + return; +} + + +/* This routine will in the future do all the nasty prom stuff + * to probe for the mmu type and its parameters, etc. This will + * also be where SMP things happen plus the Sparc specific memory + * physical memory probe as on the alpha. + */ + +extern void register_console(void (*proc)(const char *)); +extern unsigned int prom_iface_vers, end_of_phys_memory; + +void setup_arch(char **cmdline_p, + unsigned long * memory_start_p, unsigned long * memory_end_p) +{ + if(romvec->pv_romvers == 0) { + register_console(sparc_console_print); + } else { + register_console(sparc_console_print_v3); + }; + + printk("Sparc PROM-Console registered...\n"); + get_idprom(); /* probe_devices expects this to be done */ + probe_devices(); /* cpu/fpu, mmu probes */ + + *memory_start_p = (((unsigned long) &end)); + *memory_end_p = (((unsigned long) end_of_phys_memory)); +} + +asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on) +{ + return -EIO; +} diff --git a/arch/sparc/kernel/signal.c b/arch/sparc/kernel/signal.c new file mode 100644 index 000000000..cd949e4ed --- /dev/null +++ b/arch/sparc/kernel/signal.c @@ -0,0 +1,71 @@ +/* + * linux/arch/sparc/kernel/signal.c + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <linux/sched.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 <asm/segment.h> + +#define _S(nr) (1<<((nr)-1)) + +#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP))) + +asmlinkage int sys_waitpid(pid_t pid,unsigned long * stat_addr, int options); + +/* + * atomically swap in the new signal mask, and wait for a signal. + */ +asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, unsigned long set) +{ + unsigned long mask; + struct pt_regs * regs = (struct pt_regs *) &restart; + + mask = current->blocked; + current->blocked = set & _BLOCKABLE; + + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + if (do_signal(mask,regs)) + return -EINTR; + } +} + +asmlinkage int sys_sigreturn(unsigned long __unused) +{ + halt(); + return 0; +} + +/* + * Set up a signal frame... Make the stack look the way iBCS2 expects + * it to look. + */ +void setup_frame(struct sigaction * sa, unsigned long ** fp, unsigned long eip, + struct pt_regs * regs, int signr, unsigned long oldmask) +{ + halt(); +} + +/* + * 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. + */ +asmlinkage int do_signal(unsigned long oldmask, struct pt_regs * regs) +{ + halt(); + return 1; +} diff --git a/arch/sparc/kernel/traps.c b/arch/sparc/kernel/traps.c new file mode 100644 index 000000000..9302191c7 --- /dev/null +++ b/arch/sparc/kernel/traps.c @@ -0,0 +1,47 @@ +/* + * arch/sparc/kernel/traps.c + * + * Copyright 1994 David S. Miller (davem@caip.rutgers.edu) + */ + +/* + * I hate traps on the sparc, grrr... + */ + +#include <linux/sched.h> /* for jiffies */ +#include <linux/kernel.h> + +void do_hw_interrupt(unsigned long type, unsigned long vector) +{ + if (vector == 14) { + jiffies++; + return; + } + + /* Just print garbage for everything else for now. */ + + printk("Unimplemented Sparc TRAP, vector = %lx type = %lx\n", vector, type); + + return; +} + +extern unsigned long *trapbase; + +void trap_init(void) +{ + + /* load up the trap table */ + +#if 0 /* not yet */ + __asm__("wr %0, 0x0, %%tbr\n\t" + "nop; nop; nop\n\t" : : + "r" (trapbase)); +#endif + + return; +} + +void die_if_kernel(char * str, struct pt_regs * regs, long err) +{ + return; +} |