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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 | ||
25 | extern __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) */ |