1 /* $Id: traps.h,v 1.9 1998/03/09 14:04:53 jj Exp $ 2 * traps.h: Format of entries for the Sparc trap table. 3 * 4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 5 */ 6 7 #ifndef _SPARC_TRAPS_H 8 #define _SPARC_TRAPS_H 9 10 #define NUM_SPARC_TRAPS 255 11 12 #ifndef __ASSEMBLY__ 13 14 /* This is for V8 compliant Sparc CPUS */ 15 struct tt_entry { 16 unsigned long inst_one; 17 unsigned long inst_two; 18 unsigned long inst_three; 19 unsigned long inst_four; 20 }; 21 22 /* We set this to _start in system setup. */ 23 extern struct tt_entry *sparc_ttable; 24 get_tbr(void)25extern __inline__ unsigned long get_tbr(void) 26 { 27 unsigned long tbr; 28 29 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (tbr)); 30 return tbr; 31 } 32 33 #endif /* !(__ASSEMBLY__) */ 34 35 /* For patching the trap table at boot time, we need to know how to 36 * form various common Sparc instructions. Thus these macros... 37 */ 38 39 #define SPARC_MOV_CONST_L3(const) (0xa6102000 | (const&0xfff)) 40 41 /* The following assumes that the branch lies before the place we 42 * are branching to. This is the case for a trap vector... 43 * You have been warned. 44 */ 45 #define SPARC_BRANCH(dest_addr, inst_addr) \ 46 (0x10800000 | (((dest_addr-inst_addr)>>2)&0x3fffff)) 47 48 #define SPARC_RD_PSR_L0 (0xa1480000) 49 #define SPARC_RD_WIM_L3 (0xa7500000) 50 #define SPARC_NOP (0x01000000) 51 52 /* Various interesting trap levels. */ 53 /* First, hardware traps. */ 54 #define SP_TRAP_TFLT 0x1 /* Text fault */ 55 #define SP_TRAP_II 0x2 /* Illegal Instruction */ 56 #define SP_TRAP_PI 0x3 /* Privileged Instruction */ 57 #define SP_TRAP_FPD 0x4 /* Floating Point Disabled */ 58 #define SP_TRAP_WOVF 0x5 /* Window Overflow */ 59 #define SP_TRAP_WUNF 0x6 /* Window Underflow */ 60 #define SP_TRAP_MNA 0x7 /* Memory Address Unaligned */ 61 #define SP_TRAP_FPE 0x8 /* Floating Point Exception */ 62 #define SP_TRAP_DFLT 0x9 /* Data Fault */ 63 #define SP_TRAP_TOF 0xa /* Tag Overflow */ 64 #define SP_TRAP_WDOG 0xb /* Watchpoint Detected */ 65 #define SP_TRAP_IRQ1 0x11 /* IRQ level 1 */ 66 #define SP_TRAP_IRQ2 0x12 /* IRQ level 2 */ 67 #define SP_TRAP_IRQ3 0x13 /* IRQ level 3 */ 68 #define SP_TRAP_IRQ4 0x14 /* IRQ level 4 */ 69 #define SP_TRAP_IRQ5 0x15 /* IRQ level 5 */ 70 #define SP_TRAP_IRQ6 0x16 /* IRQ level 6 */ 71 #define SP_TRAP_IRQ7 0x17 /* IRQ level 7 */ 72 #define SP_TRAP_IRQ8 0x18 /* IRQ level 8 */ 73 #define SP_TRAP_IRQ9 0x19 /* IRQ level 9 */ 74 #define SP_TRAP_IRQ10 0x1a /* IRQ level 10 */ 75 #define SP_TRAP_IRQ11 0x1b /* IRQ level 11 */ 76 #define SP_TRAP_IRQ12 0x1c /* IRQ level 12 */ 77 #define SP_TRAP_IRQ13 0x1d /* IRQ level 13 */ 78 #define SP_TRAP_IRQ14 0x1e /* IRQ level 14 */ 79 #define SP_TRAP_IRQ15 0x1f /* IRQ level 15 Non-maskable */ 80 #define SP_TRAP_RACC 0x20 /* Register Access Error ??? */ 81 #define SP_TRAP_IACC 0x21 /* Instruction Access Error */ 82 #define SP_TRAP_CPDIS 0x24 /* Co-Processor Disabled */ 83 #define SP_TRAP_BADFL 0x25 /* Unimplemented Flush Instruction */ 84 #define SP_TRAP_CPEXP 0x28 /* Co-Processor Exception */ 85 #define SP_TRAP_DACC 0x29 /* Data Access Error */ 86 #define SP_TRAP_DIVZ 0x2a /* Divide By Zero */ 87 #define SP_TRAP_DSTORE 0x2b /* Data Store Error ??? */ 88 #define SP_TRAP_DMM 0x2c /* Data Access MMU Miss ??? */ 89 #define SP_TRAP_IMM 0x3c /* Instruction Access MMU Miss ??? */ 90 91 /* Now the Software Traps... */ 92 #define SP_TRAP_SUNOS 0x80 /* SunOS System Call */ 93 #define SP_TRAP_SBPT 0x81 /* Software Breakpoint */ 94 #define SP_TRAP_SDIVZ 0x82 /* Software Divide-by-Zero trap */ 95 #define SP_TRAP_FWIN 0x83 /* Flush Windows */ 96 #define SP_TRAP_CWIN 0x84 /* Clean Windows */ 97 #define SP_TRAP_RCHK 0x85 /* Range Check */ 98 #define SP_TRAP_FUNA 0x86 /* Fix Unaligned Access */ 99 #define SP_TRAP_IOWFL 0x87 /* Integer Overflow */ 100 #define SP_TRAP_SOLARIS 0x88 /* Solaris System Call */ 101 #define SP_TRAP_NETBSD 0x89 /* NetBSD System Call */ 102 #define SP_TRAP_LINUX 0x90 /* Linux System Call */ 103 104 /* Names used for compatibility with SunOS */ 105 #define ST_SYSCALL 0x00 106 #define ST_BREAKPOINT 0x01 107 #define ST_DIV0 0x02 108 #define ST_FLUSH_WINDOWS 0x03 109 #define ST_CLEAN_WINDOWS 0x04 110 #define ST_RANGE_CHECK 0x05 111 #define ST_FIX_ALIGN 0x06 112 #define ST_INT_OVERFLOW 0x07 113 114 /* Special traps... */ 115 #define SP_TRAP_KBPT1 0xfe /* KADB/PROM Breakpoint one */ 116 #define SP_TRAP_KBPT2 0xff /* KADB/PROM Breakpoint two */ 117 118 /* Handy Macros */ 119 /* Is this a trap we never expect to get? */ 120 #define BAD_TRAP_P(level) \ 121 ((level > SP_TRAP_WDOG && level < SP_TRAP_IRQ1) || \ 122 (level > SP_TRAP_IACC && level < SP_TRAP_CPDIS) || \ 123 (level > SP_TRAP_BADFL && level < SP_TRAP_CPEXP) || \ 124 (level > SP_TRAP_DMM && level < SP_TRAP_IMM) || \ 125 (level > SP_TRAP_IMM && level < SP_TRAP_SUNOS) || \ 126 (level > SP_TRAP_LINUX && level < SP_TRAP_KBPT1)) 127 128 /* Is this a Hardware trap? */ 129 #define HW_TRAP_P(level) ((level > 0) && (level < SP_TRAP_SUNOS)) 130 131 /* Is this a Software trap? */ 132 #define SW_TRAP_P(level) ((level >= SP_TRAP_SUNOS) && (level <= SP_TRAP_KBPT2)) 133 134 /* Is this a system call for some OS we know about? */ 135 #define SCALL_TRAP_P(level) ((level == SP_TRAP_SUNOS) || \ 136 (level == SP_TRAP_SOLARIS) || \ 137 (level == SP_TRAP_NETBSD) || \ 138 (level == SP_TRAP_LINUX)) 139 140 #endif /* !(_SPARC_TRAPS_H) */ 141