[deliverable/linux.git] / include / asm-powerpc / bug.h

#ifndef _ASM_POWERPC_BUG_H
#define _ASM_POWERPC_BUG_H
#ifdef __KERNEL__

#include <asm/asm-compat.h>
/*
 * Define an illegal instr to trap on the bug.
 * We don't use 0 because that marks the end of a function
 * in the ELF ABI.  That's "Boo Boo" in case you wonder...
 */
#define BUG_OPCODE .long 0x00b00b00  /* For asm */
#define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */

#ifdef CONFIG_BUG

#ifdef __ASSEMBLY__
#ifdef CONFIG_DEBUG_BUGVERBOSE
.macro EMIT_BUG_ENTRY addr,file,line,flags
	 .section __bug_table,"a"
5001:	 PPC_LONG \addr, 5002f
	 .short \line, \flags
	 .org 5001b+BUG_ENTRY_SIZE
	 .previous
	 .section .rodata,"a"
5002:	 .asciz "\file"
	 .previous
.endm
#else
 .macro EMIT_BUG_ENTRY addr,file,line,flags
	 .section __bug_table,"a"
5001:	 PPC_LONG \addr
	 .short \flags
	 .org 5001b+BUG_ENTRY_SIZE
	 .previous
.endm
#endif /* verbose */

#else /* !__ASSEMBLY__ */
/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and
   sizeof(struct bug_entry), respectively */
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define _EMIT_BUG_ENTRY				\
	".section __bug_table,\"a\"\n"		\
	"2:\t" PPC_LONG "1b, %0\n"		\
	"\t.short %1, %2\n"			\
	".org 2b+%3\n"				\
	".previous\n"
#else
#define _EMIT_BUG_ENTRY				\
	".section __bug_table,\"a\"\n"		\
	"2:\t" PPC_LONG "1b\n"			\
	"\t.short %2\n"				\
	".org 2b+%3\n"				\
	".previous\n"
#endif

/*
 * BUG_ON() and WARN_ON() do their best to cooperate with compile-time
 * optimisations. However depending on the complexity of the condition
 * some compiler versions may not produce optimal results.
 */

#define BUG() do {						\
	__asm__ __volatile__(					\
		"1:	twi 31,0,0\n"				\
		_EMIT_BUG_ENTRY					\
		: : "i" (__FILE__), "i" (__LINE__),		\
		    "i" (0), "i"  (sizeof(struct bug_entry)));	\
	for(;;) ;						\
} while (0)

#define BUG_ON(x) do {						\
	if (__builtin_constant_p(x)) {				\
		if (x)						\
			BUG();					\
	} else {						\
		__asm__ __volatile__(				\
		"1:	"PPC_TLNEI"	%4,0\n"			\
		_EMIT_BUG_ENTRY					\
		: : "i" (__FILE__), "i" (__LINE__), "i" (0),	\
		  "i" (sizeof(struct bug_entry)),		\
		  "r" ((long)(x)));				\
	}							\
} while (0)

#define __WARN() do {						\
	__asm__ __volatile__(					\
		"1:	twi 31,0,0\n"				\
		_EMIT_BUG_ENTRY					\
		: : "i" (__FILE__), "i" (__LINE__),		\
		  "i" (BUGFLAG_WARNING),			\
		  "i" (sizeof(struct bug_entry)));		\
} while (0)

#define WARN_ON(x) ({						\
	typeof(x) __ret_warn_on = (x);				\
	if (__builtin_constant_p(__ret_warn_on)) {		\
		if (__ret_warn_on)				\
			__WARN();				\
	} else {						\
		__asm__ __volatile__(				\
		"1:	"PPC_TLNEI"	%4,0\n"			\
		_EMIT_BUG_ENTRY					\
		: : "i" (__FILE__), "i" (__LINE__),		\
		  "i" (BUGFLAG_WARNING),			\
		  "i" (sizeof(struct bug_entry)),		\
		  "r" (__ret_warn_on));				\
	}							\
	unlikely(__ret_warn_on);				\
})

#define HAVE_ARCH_BUG
#define HAVE_ARCH_BUG_ON
#define HAVE_ARCH_WARN_ON
#endif /* __ASSEMBLY __ */
#endif /* CONFIG_BUG */

#include <asm-generic/bug.h>

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_BUG_H */
Commit	Line	Data
	1	#ifndef _ASM_POWERPC_BUG_H
	2	#define _ASM_POWERPC_BUG_H
	3	#ifdef __KERNEL__
	4
	5	#include <asm/asm-compat.h>
	6	/*
	7	* Define an illegal instr to trap on the bug.
	8	* We don't use 0 because that marks the end of a function
	9	* in the ELF ABI. That's "Boo Boo" in case you wonder...
	10	*/
	11	#define BUG_OPCODE .long 0x00b00b00 /* For asm */
	12	#define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
	13
	14	#ifdef CONFIG_BUG
	15
	16	#ifdef __ASSEMBLY__
	17	#ifdef CONFIG_DEBUG_BUGVERBOSE
	18	.macro EMIT_BUG_ENTRY addr,file,line,flags
	19	.section __bug_table,"a"
	20	5001: PPC_LONG \addr, 5002f
	21	.short \line, \flags
	22	.org 5001b+BUG_ENTRY_SIZE
	23	.previous
	24	.section .rodata,"a"
	25	5002: .asciz "\file"
	26	.previous
	27	.endm
	28	#else
	29	.macro EMIT_BUG_ENTRY addr,file,line,flags
	30	.section __bug_table,"a"
	31	5001: PPC_LONG \addr
	32	.short \flags
	33	.org 5001b+BUG_ENTRY_SIZE
	34	.previous
	35	.endm
	36	#endif /* verbose */
	37
	38	#else /* !__ASSEMBLY__ */
	39	/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and
	40	sizeof(struct bug_entry), respectively */
	41	#ifdef CONFIG_DEBUG_BUGVERBOSE
	42	#define _EMIT_BUG_ENTRY \
	43	".section __bug_table,\"a\"\n" \
	44	"2:\t" PPC_LONG "1b, %0\n" \
	45	"\t.short %1, %2\n" \
	46	".org 2b+%3\n" \
	47	".previous\n"
	48	#else
	49	#define _EMIT_BUG_ENTRY \
	50	".section __bug_table,\"a\"\n" \
	51	"2:\t" PPC_LONG "1b\n" \
	52	"\t.short %2\n" \
	53	".org 2b+%3\n" \
	54	".previous\n"
	55	#endif
	56
	57	/*
	58	* BUG_ON() and WARN_ON() do their best to cooperate with compile-time
	59	* optimisations. However depending on the complexity of the condition
	60	* some compiler versions may not produce optimal results.
	61	*/
	62
	63	#define BUG() do { \
	64	__asm__ __volatile__( \
	65	"1: twi 31,0,0\n" \
	66	_EMIT_BUG_ENTRY \
	67	: : "i" (__FILE__), "i" (__LINE__), \
	68	"i" (0), "i" (sizeof(struct bug_entry))); \
	69	for(;;) ; \
	70	} while (0)
	71
	72	#define BUG_ON(x) do { \
	73	if (__builtin_constant_p(x)) { \
	74	if (x) \
	75	BUG(); \
	76	} else { \
	77	__asm__ __volatile__( \
	78	"1: "PPC_TLNEI" %4,0\n" \
	79	_EMIT_BUG_ENTRY \
	80	: : "i" (__FILE__), "i" (__LINE__), "i" (0), \
	81	"i" (sizeof(struct bug_entry)), \
	82	"r" ((long)(x))); \
	83	} \
	84	} while (0)
	85
	86	#define __WARN() do { \
	87	__asm__ __volatile__( \
	88	"1: twi 31,0,0\n" \
	89	_EMIT_BUG_ENTRY \
	90	: : "i" (__FILE__), "i" (__LINE__), \
	91	"i" (BUGFLAG_WARNING), \
	92	"i" (sizeof(struct bug_entry))); \
	93	} while (0)
	94
	95	#define WARN_ON(x) ({ \
	96	typeof(x) __ret_warn_on = (x); \
	97	if (__builtin_constant_p(__ret_warn_on)) { \
	98	if (__ret_warn_on) \
	99	__WARN(); \
	100	} else { \
	101	__asm__ __volatile__( \
	102	"1: "PPC_TLNEI" %4,0\n" \
	103	_EMIT_BUG_ENTRY \
	104	: : "i" (__FILE__), "i" (__LINE__), \
	105	"i" (BUGFLAG_WARNING), \
	106	"i" (sizeof(struct bug_entry)), \
	107	"r" (__ret_warn_on)); \
	108	} \
	109	unlikely(__ret_warn_on); \
	110	})
	111
	112	#define HAVE_ARCH_BUG
	113	#define HAVE_ARCH_BUG_ON
	114	#define HAVE_ARCH_WARN_ON
	115	#endif /* __ASSEMBLY __ */
	116	#endif /* CONFIG_BUG */
	117
	118	#include <asm-generic/bug.h>
	119
	120	#endif /* __KERNEL__ */
	121	#endif /* _ASM_POWERPC_BUG_H */