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#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
21# define __BUG_REL(val) ".word " __stringify(val) " - ."
22#else
23# define __BUG_REL(val) ".word " __stringify(val)
24#endif
25
26
27#ifdef CONFIG_DEBUG_BUGVERBOSE
28#define BUG()								\
29	do {								\
30		asm volatile("\n"					\
31			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
32			     "\t.pushsection __bug_table,\"a\"\n"	\
33			     "\t.align 4\n"				\
34			     "2:\t" __BUG_REL(1b) "\n"			\
35			     "\t" __BUG_REL(%c0)  "\n"			\
36			     "\t.short %1, %2\n"			\
37			     "\t.blockz %3-2*4-2*2\n"			\
38			     "\t.popsection"				\
39			     : : "i" (__FILE__), "i" (__LINE__),	\
40			     "i" (0), "i" (sizeof(struct bug_entry)) );	\
41		unreachable();						\
42	} while(0)
43
44#else
45#define BUG()								\
46	do {								\
47		asm volatile(PARISC_BUG_BREAK_ASM : : );		\
48		unreachable();						\
49	} while(0)
50#endif
51
52#ifdef CONFIG_DEBUG_BUGVERBOSE
53#define __WARN_FLAGS(flags)						\
54	do {								\
55		asm volatile("\n"					\
56			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
57			     "\t.pushsection __bug_table,\"a\"\n"	\
58			     "\t.align 4\n"				\
59			     "2:\t" __BUG_REL(1b) "\n"			\
60			     "\t" __BUG_REL(%c0)  "\n"			\
61			     "\t.short %1, %2\n"			\
62			     "\t.blockz %3-2*4-2*2\n"			\
63			     "\t.popsection"				\
64			     : : "i" (__FILE__), "i" (__LINE__),	\
65			     "i" (BUGFLAG_WARNING|(flags)),		\
66			     "i" (sizeof(struct bug_entry)) );		\
67	} while(0)
68#else
69#define __WARN_FLAGS(flags)						\
70	do {								\
71		asm volatile("\n"					\
72			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
73			     "\t.pushsection __bug_table,\"a\"\n"	\
74			     "\t.align 4\n"				\
75			     "2:\t" __BUG_REL(1b) "\n"			\
76			     "\t.short %0\n"				\
77			     "\t.blockz %1-4-2\n"			\
78			     "\t.popsection"				\
79			     : : "i" (BUGFLAG_WARNING|(flags)),		\
80			     "i" (sizeof(struct bug_entry)) );		\
81	} while(0)
82#endif
83
84
85#define WARN_ON(x) ({						\
86	int __ret_warn_on = !!(x);				\
87	if (__builtin_constant_p(__ret_warn_on)) {		\
88		if (__ret_warn_on)				\
89			__WARN();				\
90	} else {						\
91		if (unlikely(__ret_warn_on))			\
92			__WARN();				\
93	}							\
94	unlikely(__ret_warn_on);				\
95})
96
97#endif
98
99#include <asm-generic/bug.h>
100#endif
101
102