bug.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _PARISC_BUG_H
 3#define _PARISC_BUG_H
 4
 5/*
 6 * Tell the user there is some problem.
 7 * The offending file and line are encoded in the __bug_table section.
 8 */
 9
10#ifdef CONFIG_BUG
11#define HAVE_ARCH_BUG
12#define HAVE_ARCH_WARN_ON
13
14/* the break instruction is used as BUG() marker.  */
15#define	PARISC_BUG_BREAK_ASM	"break 0x1f, 0x1fff"
16#define	PARISC_BUG_BREAK_INSN	0x03ffe01f  /* PARISC_BUG_BREAK_ASM */
17
18#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
19# define __BUG_REL(val) ".word " __stringify(val) " - ."
20#else
21# define __BUG_REL(val) ".word " __stringify(val)
22#endif
23
24
25#ifdef CONFIG_DEBUG_BUGVERBOSE
26#define BUG()								\
27	do {								\
28		asm volatile("\n"					\
29			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
30			     "\t.pushsection __bug_table,\"a\"\n"	\
31			     "\t.align 4\n"				\
32			     "2:\t" __BUG_REL(1b) "\n"			\
33			     "\t" __BUG_REL(%c0)  "\n"			\
34			     "\t.short %1, %2\n"			\
35			     "\t.blockz %3-2*4-2*2\n"			\
36			     "\t.popsection"				\
37			     : : "i" (__FILE__), "i" (__LINE__),	\
38			     "i" (0), "i" (sizeof(struct bug_entry)) );	\
39		unreachable();						\
40	} while(0)
41
42#else
43#define BUG()								\
44	do {								\
45		asm volatile(PARISC_BUG_BREAK_ASM : : );		\
46		unreachable();						\
47	} while(0)
48#endif
49
50#ifdef CONFIG_DEBUG_BUGVERBOSE
51#define __WARN_FLAGS(cond_str, flags)					\
52	do {								\
53		asm volatile("\n"					\
54			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
55			     "\t.pushsection __bug_table,\"a\"\n"	\
56			     "\t.align 4\n"				\
57			     "2:\t" __BUG_REL(1b) "\n"			\
58			     "\t" __BUG_REL(%c0)  "\n"			\
59			     "\t.short %1, %2\n"			\
60			     "\t.blockz %3-2*4-2*2\n"			\
61			     "\t.popsection"				\
62			     : : "i" (WARN_CONDITION_STR(cond_str) __FILE__), "i" (__LINE__), \
63			     "i" (BUGFLAG_WARNING|(flags)),		\
64			     "i" (sizeof(struct bug_entry)) );		\
65	} while(0)
66#else
67#define __WARN_FLAGS(cond_str, flags)					\
68	do {								\
69		asm volatile("\n"					\
70			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
71			     "\t.pushsection __bug_table,\"a\"\n"	\
72			     "\t.align 4\n"				\
73			     "2:\t" __BUG_REL(1b) "\n"			\
74			     "\t.short %0\n"				\
75			     "\t.blockz %1-4-2\n"			\
76			     "\t.popsection"				\
77			     : : "i" (BUGFLAG_WARNING|(flags)),		\
78			     "i" (sizeof(struct bug_entry)) );		\
79	} while(0)
80#endif
81
82
83#define WARN_ON(x) ({						\
84	int __ret_warn_on = !!(x);				\
85	if (__builtin_constant_p(__ret_warn_on)) {		\
86		if (__ret_warn_on)				\
87			__WARN();				\
88	} else {						\
89		if (unlikely(__ret_warn_on))			\
90			__WARN();				\
91	}							\
92	unlikely(__ret_warn_on);				\
93})
94
95#endif
96
97#include <asm-generic/bug.h>
98#endif
99