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