1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _PARISC_BUG_H
3#define _PARISC_BUG_H
4
5#include <linux/kernel.h>	/* for BUGFLAG_TAINT */
6
7/*
8 * Tell the user there is some problem.
9 * The offending file and line are encoded in the __bug_table section.
10 */
11
12#ifdef CONFIG_BUG
13#define HAVE_ARCH_BUG
14#define HAVE_ARCH_WARN_ON
15
16/* the break instruction is used as BUG() marker.  */
17#define	PARISC_BUG_BREAK_ASM	"break 0x1f, 0x1fff"
18#define	PARISC_BUG_BREAK_INSN	0x03ffe01f  /* PARISC_BUG_BREAK_ASM */
19
20#if defined(CONFIG_64BIT)
21#define ASM_WORD_INSN		".dword\t"
22#else
23#define ASM_WORD_INSN		".word\t"
24#endif
25
26#ifdef CONFIG_DEBUG_BUGVERBOSE
27#define BUG()								\
28	do {								\
29		asm volatile("\n"					\
30			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
31			     "\t.pushsection __bug_table,\"aw\"\n"	\
32			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
33			     "\t.short %c1, %c2\n"			\
34			     "\t.org 2b+%c3\n"				\
35			     "\t.popsection"				\
36			     : : "i" (__FILE__), "i" (__LINE__),	\
37			     "i" (0), "i" (sizeof(struct bug_entry)) ); \
38		unreachable();						\
39	} while(0)
40
41#else
42#define BUG()								\
43	do {								\
44		asm volatile(PARISC_BUG_BREAK_ASM : : );		\
45		unreachable();						\
46	} while(0)
47#endif
48
49#ifdef CONFIG_DEBUG_BUGVERBOSE
50#define __WARN_FLAGS(flags)						\
51	do {								\
52		asm volatile("\n"					\
53			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
54			     "\t.pushsection __bug_table,\"aw\"\n"	\
55			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
56			     "\t.short %c1, %c2\n"			\
57			     "\t.org 2b+%c3\n"				\
58			     "\t.popsection"				\
59			     : : "i" (__FILE__), "i" (__LINE__),	\
60			     "i" (BUGFLAG_WARNING|(flags)),		\
61			     "i" (sizeof(struct bug_entry)) );		\
62	} while(0)
63#else
64#define __WARN_FLAGS(flags)						\
65	do {								\
66		asm volatile("\n"					\
67			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
68			     "\t.pushsection __bug_table,\"aw\"\n"	\
69			     "2:\t" ASM_WORD_INSN "1b\n"		\
70			     "\t.short %c0\n"				\
71			     "\t.org 2b+%c1\n"				\
72			     "\t.popsection"				\
73			     : : "i" (BUGFLAG_WARNING|(flags)),		\
74			     "i" (sizeof(struct bug_entry)) );		\
75	} while(0)
76#endif
77
78
79#define WARN_ON(x) ({						\
80	int __ret_warn_on = !!(x);				\
81	if (__builtin_constant_p(__ret_warn_on)) {		\
82		if (__ret_warn_on)				\
83			__WARN();				\
84	} else {						\
85		if (unlikely(__ret_warn_on))			\
86			__WARN();				\
87	}							\
88	unlikely(__ret_warn_on);				\
89})
90
91#endif
92
93#include <asm-generic/bug.h>
94#endif
95
96