#ifndef _ASMARM_BUG_H
#define _ASMARM_BUG_H

#include <linux/linkage.h>
#include <linux/types.h>
#include <asm/opcodes.h>

#ifdef CONFIG_BUG

/*
* Use a suitable undefined instruction to use for ARM/Thumb2 bug handling.
* We need to be careful not to conflict with those used by other modules and
* the register_undef_hook() system.
*/
#ifdef CONFIG_THUMB2_KERNEL
#define BUG_INSTR_VALUE 0xde02
#define BUG_INSTR(__value) __inst_thumb16(__value)
#else
#define BUG_INSTR_VALUE 0xe7f001f2
#define BUG_INSTR(__value) __inst_arm(__value)
#endif


#define BUG() _BUG(__FILE__, __LINE__, BUG_INSTR_VALUE)
#define _BUG(file, line, value) __BUG(file, line, value)

#ifdef CONFIG_DEBUG_BUGVERBOSE

/*
* The extra indirection is to ensure that the __FILE__ string comes through
* OK. Many version of gcc do not support the asm %c parameter which would be
* preferable to this unpleasantness. We use mergeable string sections to
* avoid multiple copies of the string appearing in the kernel image.
*/

#define __BUG(__file, __line, __value) \
do { \
asm volatile("1:\t" BUG_INSTR(__value) "\n" \
".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \
"2:\t.asciz " #__file "\n" \
".popsection\n" \
".pushsection __bug_table,\"a\"\n" \
"3:\t.word 1b, 2b\n" \
"\t.hword " #__line ", 0\n" \
".popsection"); \
unreachable(); \
} while (0)

#else /* not CONFIG_DEBUG_BUGVERBOSE */

#define __BUG(__file, __line, __value) \
do { \
asm volatile(BUG_INSTR(__value) "\n"); \
unreachable(); \
} while (0)
#endif /* CONFIG_DEBUG_BUGVERBOSE */

#define HAVE_ARCH_BUG
#endif /* CONFIG_BUG */

#include <asm-generic/bug.h>

struct pt_regs;
void die(const char *msg, struct pt_regs *regs, int err);

struct siginfo;
void arm_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,
unsigned long err, unsigned long trap);

#ifdef CONFIG_ARM_LPAE
#define FAULT_CODE_ALIGNMENT 33
#define FAULT_CODE_DEBUG 34
#else
#define FAULT_CODE_ALIGNMENT 1
#define FAULT_CODE_DEBUG 2
#endif

void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
struct pt_regs *),
int sig, int code, const char *name);

void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,
struct pt_regs *),
int sig, int code, const char *name);

extern asmlinkage void c_backtrace(unsigned long fp, int pmode);

struct mm_struct;
extern void show_pte(struct mm_struct *mm, unsigned long addr);
extern void __show_regs(struct pt_regs *);

#endif