Import of Linux/MIPS 2.1.14

1 files changed, 91 insertions, 52 deletions

diff --git a/include/asm-sparc/head.h b/include/asm-sparc/head.h
index b26067623..f89e41fc8 100644
--- a/include/asm-sparc/head.h
+++ b/include/asm-sparc/head.h
@@ -1,75 +1,114 @@
+/* $Id: head.h,v 1.30 1996/07/29 21:00:28 miguel Exp $ */
 #ifndef __SPARC_HEAD_H
 #define __SPARC_HEAD_H
 
-#define KERNSIZE	134217728   /* this is how much of a mapping the prom promises */
-#define PAGESIZE	4096        /* luckily this is the same on sun4c's and sun4m's */
-#define PAGESHIFT       12
-#define PROM_BASE	-1568768    /* casa 'de PROM */
-#define LOAD_ADDR       0x4000      /* prom jumps to us here */
-#define C_STACK         96
+#define KERNBASE        0xf0000000  /* First address the kernel will eventually be */
+#define LOAD_ADDR       0x4000      /* prom jumps to us here unless this is elf /boot */
 #define SUN4C_SEGSZ     (1 << 18)
-#define USRSTACK        0x0         /* no joke, this is temporary, trust me */
-#define INT_ENABLE_REG_PHYSADR      0xf5000000
-#define INTS_ENAB   0x01
+#define SRMMU_L1_KBASE_OFFSET ((KERNBASE>>24)<<2)  /* Used in boot remapping. */
+#define INTS_ENAB        0x01           /* entry.S uses this. */
 
-#define BOOT_MSG_LEN    61
-#define BOOT_MSG2_LEN   50
+#define NCPUS            4              /* Architectural limit of sun4m. */
 
+#define SUN4_PROM_VECTOR 0xFFE81000     /* To safely die on a SUN4 */
+#define SUN4_PRINTF      0x84           /* Offset into SUN4_PROM_VECTOR */
 
-#define WRITE_PAUSE     nop; nop; nop;
-
-#define PAGE_SIZE       4096
+#define WRITE_PAUSE      nop; nop; nop; /* Have to do this after %wim/%psr chg */
+#define NOP_INSN         0x01000000     /* Used to patch sparc_save_state */
 
 /* Here are some trap goodies */
 
-
 /* Generic trap entry. */
-
 #define TRAP_ENTRY(type, label) \
-	mov (type), %l3; b label; rd %psr, %l0; nop;
+	rd %psr, %l0; b label; rd %wim, %l3; nop;
+
+/* Data/text faults. Defaults to sun4c version at boot time. */
+#define SPARC_TFAULT rd %psr, %l0; rd %wim, %l3; b sun4c_fault; mov 1, %l7;
+#define SPARC_DFAULT rd %psr, %l0; rd %wim, %l3; b sun4c_fault; mov 0, %l7;
+#define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b C_LABEL(srmmu_fault); mov 1, %l7;
+#define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b C_LABEL(srmmu_fault); mov 0, %l7;
+
+/* This is for traps we should NEVER get. */
+#define BAD_TRAP(num) \
+        rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3;
+
+/* Notice that for the system calls we pull a trick.  We load up a
+ * different pointer to the system call vector table in %l7, but call
+ * the same generic system call low-level entry point.  The trap table
+ * entry sequences are also HyperSparc pipeline friendly ;-)
+ */
+
+/* Software trap for Linux system calls. */
+#define LINUX_SYSCALL_TRAP \
+        sethi %hi(C_LABEL(sys_call_table)), %l7; \
+        or %l7, %lo(C_LABEL(sys_call_table)), %l7; \
+        b linux_sparc_syscall; \
+        rd %psr, %l0;
+
+/* Software trap for SunOS4.1.x system calls. */
+#define SUNOS_SYSCALL_TRAP \
+        rd %psr, %l0; \
+        sethi %hi(C_LABEL(sunos_sys_table)), %l7; \
+        b linux_sparc_syscall; \
+        or %l7, %lo(C_LABEL(sunos_sys_table)), %l7;
+
+/* Software trap for Slowaris system calls. */
+#define SOLARIS_SYSCALL_TRAP \
+        sethi %hi(C_LABEL(sys_call_table)), %l7; \
+        or %l7, %lo(C_LABEL(sys_call_table)), %l7; \
+        b solaris_syscall; \
+        rd %psr, %l0;
+
+#define INDIRECT_SOLARIS_SYSCALL(x) \
+        sethi %hi(C_LABEL(sys_call_table)), %l7; \
+	or %g0,%lo(x),%g1; \
+	b solaris_indirect_syscall; \
+        rd %psr, %l0; 
+
+#define BREAKPOINT_TRAP \
+	b breakpoint_trap; \
+	rd %psr,%l0; \
+	nop; \
+	nop;
+
+/* Software trap for Sparc-netbsd system calls. */
+#define NETBSD_SYSCALL_TRAP \
+        sethi %hi(C_LABEL(sys_call_table)), %l7; \
+        or %l7, %lo(C_LABEL(sys_call_table)), %l7; \
+        b bsd_syscall; \
+        rd %psr, %l0;
+
+/* The Get Condition Codes software trap for userland. */
+#define GETCC_TRAP \
+        b getcc_trap_handler; mov %psr, %l0; nop; nop;
+
+/* The Set Condition Codes software trap for userland. */
+#define SETCC_TRAP \
+        b setcc_trap_handler; mov %psr, %l0; nop; nop;
 
 /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
  * gets handled with another macro.
  */
-
 #define TRAP_ENTRY_INTERRUPT(int_level) \
-        mov int_level, %l3; b stray_irq_entry; rd %psr, %l0; nop;
-
-/* Here is the macro for soft interrupts (ie. not as urgent as hard ones)
- * which need to jump to a different handler.
+        mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3;
+
+/* NMI's (Non Maskable Interrupts) are special, you can't keep them
+ * from coming in, and basically if you get one, the shows over. ;(
+ * On the sun4c they are usually asynchronous memory errors, on the
+ * the sun4m they could be either due to mem errors or a software
+ * initiated interrupt from the prom/kern on an SMP box saying "I
+ * command you to do CPU tricks, read your mailbox for more info."
  */
+#define NMI_TRAP \
+        rd %wim, %l3; b linux_trap_nmi_sun4c; mov %psr, %l0; nop;
 
-#define TRAP_ENTRY_INTERRUPT_SOFT(int_level, ident) \
-        mov int_level, %l3; rd %psr, %l0; b stray_irq_entry; mov ident, %l4;
-
-/* The above two macros are for generic traps. The following is made
- * especially for timer interrupts at IRQ level 14.
- */
-
-#define TRAP_ENTRY_TIMER \
-        mov 10, %l3; rd %psr, %l0; b sparc_timer; nop;
-
-/* Non-maskable interrupt entry macro. You have to turn off all interrupts
- * to not receive this. This is usually due to a asynchronous memory error.
- * All we can really do is stop the show. :-(
- */
-
-#define TRAP_ENTRY_INTERRUPT_NMI(t_type, jmp_to) \
-        mov t_type, %l3; b jmp_to; rd %psr, %l0; nop;
-
-/* Trap entry code in entry.S needs the offsets into task_struct
- * to get at the thread_struct goodies during window craziness.
- *
- * NOTE: We need to keep these values under 0x3ff in order to do
- *       efficient load/stores in the window fill/spill handlers.
- *       See TRAP_WIN_CLEAN in entry.S for details.
+/* Window overflows/underflows are special and we need to try to be as
+ * efficient as possible here....
  */
+#define WINDOW_SPILL \
+        rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0;
 
-#define THREAD_UWINDOWS 0x3bc
-#define THREAD_WIM 0x3c0
-#define THREAD_W_SAVED 0x3c4
-#define THREAD_KSP 0x3c8
-#define THREAD_USP 0x3cc
-#define THREAD_REG_WINDOW 0x3d4
+#define WINDOW_FILL \
+        rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0;
 
 #endif __SPARC_HEAD_H