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25433b12 BB |
1 | #ifndef _ASM_POWERPC_BUG_H |
2 | #define _ASM_POWERPC_BUG_H | |
88ced031 | 3 | #ifdef __KERNEL__ |
1da177e4 | 4 | |
3ddfbcf1 | 5 | #include <asm/asm-compat.h> |
a58f053b | 6 | |
1da177e4 LT |
7 | /* |
8 | * Define an illegal instr to trap on the bug. | |
9 | * We don't use 0 because that marks the end of a function | |
10 | * in the ELF ABI. That's "Boo Boo" in case you wonder... | |
11 | */ | |
12 | #define BUG_OPCODE .long 0x00b00b00 /* For asm */ | |
13 | #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */ | |
14 | ||
c8538a7a MM |
15 | #ifdef CONFIG_BUG |
16 | ||
007d88d0 | 17 | #ifdef __ASSEMBLY__ |
a58f053b | 18 | #include <asm/asm-offsets.h> |
007d88d0 DW |
19 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
20 | .macro EMIT_BUG_ENTRY addr,file,line,flags | |
325cdacd | 21 | .section __bug_table,"aw" |
007d88d0 DW |
22 | 5001: PPC_LONG \addr, 5002f |
23 | .short \line, \flags | |
24 | .org 5001b+BUG_ENTRY_SIZE | |
25 | .previous | |
26 | .section .rodata,"a" | |
27 | 5002: .asciz "\file" | |
28 | .previous | |
29 | .endm | |
30 | #else | |
a58f053b | 31 | .macro EMIT_BUG_ENTRY addr,file,line,flags |
325cdacd | 32 | .section __bug_table,"aw" |
007d88d0 DW |
33 | 5001: PPC_LONG \addr |
34 | .short \flags | |
35 | .org 5001b+BUG_ENTRY_SIZE | |
36 | .previous | |
37 | .endm | |
38 | #endif /* verbose */ | |
39 | ||
40 | #else /* !__ASSEMBLY__ */ | |
73c9ceab JF |
41 | /* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and |
42 | sizeof(struct bug_entry), respectively */ | |
43 | #ifdef CONFIG_DEBUG_BUGVERBOSE | |
44 | #define _EMIT_BUG_ENTRY \ | |
325cdacd | 45 | ".section __bug_table,\"aw\"\n" \ |
73c9ceab JF |
46 | "2:\t" PPC_LONG "1b, %0\n" \ |
47 | "\t.short %1, %2\n" \ | |
48 | ".org 2b+%3\n" \ | |
49 | ".previous\n" | |
50 | #else | |
51 | #define _EMIT_BUG_ENTRY \ | |
325cdacd | 52 | ".section __bug_table,\"aw\"\n" \ |
73c9ceab JF |
53 | "2:\t" PPC_LONG "1b\n" \ |
54 | "\t.short %2\n" \ | |
55 | ".org 2b+%3\n" \ | |
56 | ".previous\n" | |
57 | #endif | |
58 | ||
e3f94b85 ME |
59 | /* |
60 | * BUG_ON() and WARN_ON() do their best to cooperate with compile-time | |
61 | * optimisations. However depending on the complexity of the condition | |
62 | * some compiler versions may not produce optimal results. | |
63 | */ | |
64 | ||
73c9ceab JF |
65 | #define BUG() do { \ |
66 | __asm__ __volatile__( \ | |
67 | "1: twi 31,0,0\n" \ | |
68 | _EMIT_BUG_ENTRY \ | |
69 | : : "i" (__FILE__), "i" (__LINE__), \ | |
70 | "i" (0), "i" (sizeof(struct bug_entry))); \ | |
01ae45bc | 71 | unreachable(); \ |
1da177e4 LT |
72 | } while (0) |
73 | ||
74 | #define BUG_ON(x) do { \ | |
e3f94b85 ME |
75 | if (__builtin_constant_p(x)) { \ |
76 | if (x) \ | |
77 | BUG(); \ | |
78 | } else { \ | |
79 | __asm__ __volatile__( \ | |
73c9ceab JF |
80 | "1: "PPC_TLNEI" %4,0\n" \ |
81 | _EMIT_BUG_ENTRY \ | |
82 | : : "i" (__FILE__), "i" (__LINE__), "i" (0), \ | |
83 | "i" (sizeof(struct bug_entry)), \ | |
97f1e7f7 | 84 | "r" ((__force long)(x))); \ |
e3f94b85 | 85 | } \ |
1da177e4 LT |
86 | } while (0) |
87 | ||
19d43626 | 88 | #define __WARN_FLAGS(flags) do { \ |
1da177e4 | 89 | __asm__ __volatile__( \ |
e3f94b85 | 90 | "1: twi 31,0,0\n" \ |
73c9ceab JF |
91 | _EMIT_BUG_ENTRY \ |
92 | : : "i" (__FILE__), "i" (__LINE__), \ | |
19d43626 | 93 | "i" (BUGFLAG_WARNING|(flags)), \ |
73c9ceab | 94 | "i" (sizeof(struct bug_entry))); \ |
e3f94b85 ME |
95 | } while (0) |
96 | ||
684f9783 | 97 | #define WARN_ON(x) ({ \ |
8d4fbcfb | 98 | int __ret_warn_on = !!(x); \ |
684f9783 HX |
99 | if (__builtin_constant_p(__ret_warn_on)) { \ |
100 | if (__ret_warn_on) \ | |
872345b7 | 101 | __WARN(); \ |
e3f94b85 ME |
102 | } else { \ |
103 | __asm__ __volatile__( \ | |
73c9ceab JF |
104 | "1: "PPC_TLNEI" %4,0\n" \ |
105 | _EMIT_BUG_ENTRY \ | |
106 | : : "i" (__FILE__), "i" (__LINE__), \ | |
a093c92d | 107 | "i" (BUGFLAG_WARNING|BUGFLAG_TAINT(TAINT_WARN)),\ |
73c9ceab JF |
108 | "i" (sizeof(struct bug_entry)), \ |
109 | "r" (__ret_warn_on)); \ | |
e3f94b85 | 110 | } \ |
684f9783 HX |
111 | unlikely(__ret_warn_on); \ |
112 | }) | |
1da177e4 | 113 | |
1da177e4 LT |
114 | #define HAVE_ARCH_BUG |
115 | #define HAVE_ARCH_BUG_ON | |
116 | #define HAVE_ARCH_WARN_ON | |
25433b12 | 117 | #endif /* __ASSEMBLY __ */ |
a58f053b BH |
118 | #else |
119 | #ifdef __ASSEMBLY__ | |
120 | .macro EMIT_BUG_ENTRY addr,file,line,flags | |
121 | .endm | |
122 | #else /* !__ASSEMBLY__ */ | |
123 | #define _EMIT_BUG_ENTRY | |
124 | #endif | |
007d88d0 | 125 | #endif /* CONFIG_BUG */ |
c8538a7a | 126 | |
1da177e4 LT |
127 | #include <asm-generic/bug.h> |
128 | ||
ae3a197e DH |
129 | #ifndef __ASSEMBLY__ |
130 | ||
131 | struct pt_regs; | |
132 | extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long); | |
133 | extern void bad_page_fault(struct pt_regs *, unsigned long, int); | |
134 | extern void _exception(int, struct pt_regs *, int, unsigned long); | |
135 | extern void die(const char *, struct pt_regs *, long); | |
ae3a197e DH |
136 | |
137 | #endif /* !__ASSEMBLY__ */ | |
138 | ||
88ced031 | 139 | #endif /* __KERNEL__ */ |
25433b12 | 140 | #endif /* _ASM_POWERPC_BUG_H */ |