/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BUG_H
#define _ASM_POWERPC_BUG_H
#ifdef __KERNEL__

#include <asm/asm-compat.h>

#ifdef CONFIG_BUG

#ifdef __ASSEMBLER__
#include <asm/asm-offsets.h>
#ifdef CONFIG_DEBUG_BUGVERBOSE
.macro EMIT_BUG_ENTRY addr,file,line,flags
         .section __bug_table,"aw"
5001:    .4byte \addr - .
         .4byte 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,"aw"
5001:    .4byte \addr - .
         .short \flags
         .org 5001b+BUG_ENTRY_SIZE
         .previous
.endm
#endif /* verbose */

#else /* !__ASSEMBLER__ */
/* _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,\"aw\"\n"         \
        "2:     .4byte 1b - .\n"                \
        "       .4byte %0 - .\n"                \
        "       .short %1, %2\n"                \
        ".org 2b+%3\n"                          \
        ".previous\n"
#else
#define _EMIT_BUG_ENTRY                         \
        ".section __bug_table,\"aw\"\n"         \
        "2:     .4byte 1b - .\n"                \
        "       .short %2\n"                    \
        ".org 2b+%3\n"                          \
        ".previous\n"
#endif

#define BUG_ENTRY(cond_str, insn, flags, ...)           \
        __asm__ __volatile__(                           \
                "1:     " insn "\n"                     \
                _EMIT_BUG_ENTRY                         \
                : : "i" (WARN_CONDITION_STR(cond_str) __FILE__), "i" (__LINE__),        \
                  "i" (flags),                          \
                  "i" (sizeof(struct bug_entry)),       \
                  ##__VA_ARGS__)

/*
 * 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 {                                              \
        BUG_ENTRY("", "twi 31, 0, 0", 0);                       \
        unreachable();                                          \
} while (0)
#define HAVE_ARCH_BUG

#define __WARN_FLAGS(cond_str, flags) BUG_ENTRY(cond_str, "twi 31, 0, 0", BUGFLAG_WARNING | (flags))

#ifdef CONFIG_PPC64
#define BUG_ON(x) do {                                          \
        if (__builtin_constant_p(x)) {                          \
                if (x)                                          \
                        BUG();                                  \
        } else {                                                \
                BUG_ENTRY(#x, PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x)));  \
        }                                                       \
} while (0)

#define WARN_ON(x) ({                                           \
        int __ret_warn_on = !!(x);                              \
        if (__builtin_constant_p(__ret_warn_on)) {              \
                if (__ret_warn_on)                              \
                        __WARN();                               \
        } else {                                                \
                BUG_ENTRY(#x, PPC_TLNEI " %4, 0",                       \
                          BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN),  \
                          "r" (__ret_warn_on)); \
        }                                                       \
        unlikely(__ret_warn_on);                                \
})

#define HAVE_ARCH_BUG_ON
#define HAVE_ARCH_WARN_ON
#endif

#endif /* __ASSEMBLER__ */
#else
#ifdef __ASSEMBLER__
.macro EMIT_BUG_ENTRY addr,file,line,flags
.endm
#else /* !__ASSEMBLER__ */
#define _EMIT_BUG_ENTRY
#endif
#endif /* CONFIG_BUG */

#define EMIT_WARN_ENTRY EMIT_BUG_ENTRY

#include <asm-generic/bug.h>

#ifndef __ASSEMBLER__

struct pt_regs;
void hash__do_page_fault(struct pt_regs *);
void bad_page_fault(struct pt_regs *, int);
void emulate_single_step(struct pt_regs *regs);
extern void _exception(int, struct pt_regs *, int, unsigned long);
extern void _exception_pkey(struct pt_regs *, unsigned long, int);
extern void die(const char *, struct pt_regs *, long);
void die_mce(const char *str, struct pt_regs *regs, long err);
extern bool die_will_crash(void);
extern void panic_flush_kmsg_start(void);
extern void panic_flush_kmsg_end(void);
#endif /* !__ASSEMBLER__ */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_BUG_H */