xref: /openbmc/linux/arch/parisc/include/asm/bug.h (revision 9ac8d3fb)
1 #ifndef _PARISC_BUG_H
2 #define _PARISC_BUG_H
3 
4 /*
5  * Tell the user there is some problem.
6  * The offending file and line are encoded in the __bug_table section.
7  */
8 
9 #ifdef CONFIG_BUG
10 #define HAVE_ARCH_BUG
11 #define HAVE_ARCH_WARN_ON
12 
13 /* the break instruction is used as BUG() marker.  */
14 #define	PARISC_BUG_BREAK_ASM	"break 0x1f, 0x1fff"
15 #define	PARISC_BUG_BREAK_INSN	0x03ffe01f  /* PARISC_BUG_BREAK_ASM */
16 
17 #if defined(CONFIG_64BIT)
18 #define ASM_WORD_INSN		".dword\t"
19 #else
20 #define ASM_WORD_INSN		".word\t"
21 #endif
22 
23 #ifdef CONFIG_DEBUG_BUGVERBOSE
24 #define BUG()								\
25 	do {								\
26 		asm volatile("\n"					\
27 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
28 			     "\t.pushsection __bug_table,\"a\"\n"	\
29 			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
30 			     "\t.short %c1, %c2\n"			\
31 			     "\t.org 2b+%c3\n"				\
32 			     "\t.popsection"				\
33 			     : : "i" (__FILE__), "i" (__LINE__),	\
34 			     "i" (0), "i" (sizeof(struct bug_entry)) ); \
35 		for(;;) ;						\
36 	} while(0)
37 
38 #else
39 #define BUG()								\
40 	do {								\
41 		asm volatile(PARISC_BUG_BREAK_ASM : : );		\
42 		for(;;) ;						\
43 	} while(0)
44 #endif
45 
46 #ifdef CONFIG_DEBUG_BUGVERBOSE
47 #define __WARN()							\
48 	do {								\
49 		asm volatile("\n"					\
50 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
51 			     "\t.pushsection __bug_table,\"a\"\n"	\
52 			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
53 			     "\t.short %c1, %c2\n"			\
54 			     "\t.org 2b+%c3\n"				\
55 			     "\t.popsection"				\
56 			     : : "i" (__FILE__), "i" (__LINE__),	\
57 			     "i" (BUGFLAG_WARNING),			\
58 			     "i" (sizeof(struct bug_entry)) );		\
59 	} while(0)
60 #else
61 #define __WARN()							\
62 	do {								\
63 		asm volatile("\n"					\
64 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
65 			     "\t.pushsection __bug_table,\"a\"\n"	\
66 			     "2:\t" ASM_WORD_INSN "1b\n"		\
67 			     "\t.short %c0\n"				\
68 			     "\t.org 2b+%c1\n"				\
69 			     "\t.popsection"				\
70 			     : : "i" (BUGFLAG_WARNING),			\
71 			     "i" (sizeof(struct bug_entry)) );		\
72 	} while(0)
73 #endif
74 
75 
76 #define WARN_ON(x) ({						\
77 	int __ret_warn_on = !!(x);				\
78 	if (__builtin_constant_p(__ret_warn_on)) {		\
79 		if (__ret_warn_on)				\
80 			__WARN();				\
81 	} else {						\
82 		if (unlikely(__ret_warn_on))			\
83 			__WARN();				\
84 	}							\
85 	unlikely(__ret_warn_on);				\
86 })
87 
88 #endif
89 
90 #include <asm-generic/bug.h>
91 #endif
92 
93