x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / arch / powerpc / include / asm / bug.h
blob3a39283333c3cdbba5139f1c97f83d7f36815ed9
1 #ifndef _ASM_POWERPC_BUG_H
2 #define _ASM_POWERPC_BUG_H
3 #ifdef __KERNEL__
5 #include <asm/asm-compat.h>
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...
12 #define BUG_OPCODE .long 0x00b00b00 /* For asm */
13 #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
15 #ifdef CONFIG_BUG
17 #ifdef __ASSEMBLY__
18 #include <asm/asm-offsets.h>
19 #ifdef CONFIG_DEBUG_BUGVERBOSE
20 .macro EMIT_BUG_ENTRY addr,file,line,flags
21 .section __bug_table,"a"
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
31 .macro EMIT_BUG_ENTRY addr,file,line,flags
32 .section __bug_table,"a"
33 5001: PPC_LONG \addr
34 .short \flags
35 .org 5001b+BUG_ENTRY_SIZE
36 .previous
37 .endm
38 #endif /* verbose */
40 #else /* !__ASSEMBLY__ */
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 \
45 ".section __bug_table,\"a\"\n" \
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 \
52 ".section __bug_table,\"a\"\n" \
53 "2:\t" PPC_LONG "1b\n" \
54 "\t.short %2\n" \
55 ".org 2b+%3\n" \
56 ".previous\n"
57 #endif
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.
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))); \
71 unreachable(); \
72 } while (0)
74 #define BUG_ON(x) do { \
75 if (__builtin_constant_p(x)) { \
76 if (x) \
77 BUG(); \
78 } else { \
79 __asm__ __volatile__( \
80 "1: "PPC_TLNEI" %4,0\n" \
81 _EMIT_BUG_ENTRY \
82 : : "i" (__FILE__), "i" (__LINE__), "i" (0), \
83 "i" (sizeof(struct bug_entry)), \
84 "r" ((__force long)(x))); \
85 } \
86 } while (0)
88 #define __WARN_TAINT(taint) do { \
89 __asm__ __volatile__( \
90 "1: twi 31,0,0\n" \
91 _EMIT_BUG_ENTRY \
92 : : "i" (__FILE__), "i" (__LINE__), \
93 "i" (BUGFLAG_TAINT(taint)), \
94 "i" (sizeof(struct bug_entry))); \
95 } while (0)
97 #define WARN_ON(x) ({ \
98 int __ret_warn_on = !!(x); \
99 if (__builtin_constant_p(__ret_warn_on)) { \
100 if (__ret_warn_on) \
101 __WARN(); \
102 } else { \
103 __asm__ __volatile__( \
104 "1: "PPC_TLNEI" %4,0\n" \
105 _EMIT_BUG_ENTRY \
106 : : "i" (__FILE__), "i" (__LINE__), \
107 "i" (BUGFLAG_TAINT(TAINT_WARN)), \
108 "i" (sizeof(struct bug_entry)), \
109 "r" (__ret_warn_on)); \
111 unlikely(__ret_warn_on); \
114 #define HAVE_ARCH_BUG
115 #define HAVE_ARCH_BUG_ON
116 #define HAVE_ARCH_WARN_ON
117 #endif /* __ASSEMBLY __ */
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
125 #endif /* CONFIG_BUG */
127 #include <asm-generic/bug.h>
129 #ifndef __ASSEMBLY__
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);
137 #endif /* !__ASSEMBLY__ */
139 #endif /* __KERNEL__ */
140 #endif /* _ASM_POWERPC_BUG_H */