1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2b8b572e1SStephen Rothwell #ifndef _ASM_POWERPC_BUG_H 3b8b572e1SStephen Rothwell #define _ASM_POWERPC_BUG_H 4b8b572e1SStephen Rothwell #ifdef __KERNEL__ 5b8b572e1SStephen Rothwell 6b8b572e1SStephen Rothwell #include <asm/asm-compat.h> 7a58f053bSBenjamin Herrenschmidt 8b8b572e1SStephen Rothwell #ifdef CONFIG_BUG 9b8b572e1SStephen Rothwell 10b8b572e1SStephen Rothwell #ifdef __ASSEMBLY__ 11a58f053bSBenjamin Herrenschmidt #include <asm/asm-offsets.h> 12b8b572e1SStephen Rothwell #ifdef CONFIG_DEBUG_BUGVERBOSE 13b8b572e1SStephen Rothwell .macro EMIT_BUG_ENTRY addr,file,line,flags 14325cdacdSJosh Poimboeuf .section __bug_table,"aw" 151baa1f70SJordan Niethe 5001: .4byte \addr - 5001b, 5002f - 5001b 16b8b572e1SStephen Rothwell .short \line, \flags 17b8b572e1SStephen Rothwell .org 5001b+BUG_ENTRY_SIZE 18b8b572e1SStephen Rothwell .previous 19b8b572e1SStephen Rothwell .section .rodata,"a" 20b8b572e1SStephen Rothwell 5002: .asciz "\file" 21b8b572e1SStephen Rothwell .previous 22b8b572e1SStephen Rothwell .endm 23b8b572e1SStephen Rothwell #else 24b8b572e1SStephen Rothwell .macro EMIT_BUG_ENTRY addr,file,line,flags 25325cdacdSJosh Poimboeuf .section __bug_table,"aw" 261baa1f70SJordan Niethe 5001: .4byte \addr - 5001b 27b8b572e1SStephen Rothwell .short \flags 28b8b572e1SStephen Rothwell .org 5001b+BUG_ENTRY_SIZE 29b8b572e1SStephen Rothwell .previous 30b8b572e1SStephen Rothwell .endm 31b8b572e1SStephen Rothwell #endif /* verbose */ 32b8b572e1SStephen Rothwell 33b8b572e1SStephen Rothwell #else /* !__ASSEMBLY__ */ 34b8b572e1SStephen Rothwell /* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and 35b8b572e1SStephen Rothwell sizeof(struct bug_entry), respectively */ 36b8b572e1SStephen Rothwell #ifdef CONFIG_DEBUG_BUGVERBOSE 37b8b572e1SStephen Rothwell #define _EMIT_BUG_ENTRY \ 38325cdacdSJosh Poimboeuf ".section __bug_table,\"aw\"\n" \ 391baa1f70SJordan Niethe "2:\t.4byte 1b - 2b, %0 - 2b\n" \ 40b8b572e1SStephen Rothwell "\t.short %1, %2\n" \ 41b8b572e1SStephen Rothwell ".org 2b+%3\n" \ 42b8b572e1SStephen Rothwell ".previous\n" 43b8b572e1SStephen Rothwell #else 44b8b572e1SStephen Rothwell #define _EMIT_BUG_ENTRY \ 45325cdacdSJosh Poimboeuf ".section __bug_table,\"aw\"\n" \ 461baa1f70SJordan Niethe "2:\t.4byte 1b - 2b\n" \ 47b8b572e1SStephen Rothwell "\t.short %2\n" \ 48b8b572e1SStephen Rothwell ".org 2b+%3\n" \ 49b8b572e1SStephen Rothwell ".previous\n" 50b8b572e1SStephen Rothwell #endif 51b8b572e1SStephen Rothwell 5243f003bbSChristophe Leroy #define BUG_ENTRY(insn, flags, ...) \ 5343f003bbSChristophe Leroy __asm__ __volatile__( \ 5443f003bbSChristophe Leroy "1: " insn "\n" \ 5543f003bbSChristophe Leroy _EMIT_BUG_ENTRY \ 5643f003bbSChristophe Leroy : : "i" (__FILE__), "i" (__LINE__), \ 5743f003bbSChristophe Leroy "i" (flags), \ 5843f003bbSChristophe Leroy "i" (sizeof(struct bug_entry)), \ 5943f003bbSChristophe Leroy ##__VA_ARGS__) 6043f003bbSChristophe Leroy 61b8b572e1SStephen Rothwell /* 62b8b572e1SStephen Rothwell * BUG_ON() and WARN_ON() do their best to cooperate with compile-time 63b8b572e1SStephen Rothwell * optimisations. However depending on the complexity of the condition 64b8b572e1SStephen Rothwell * some compiler versions may not produce optimal results. 65b8b572e1SStephen Rothwell */ 66b8b572e1SStephen Rothwell 67b8b572e1SStephen Rothwell #define BUG() do { \ 6843f003bbSChristophe Leroy BUG_ENTRY("twi 31, 0, 0", 0); \ 6901ae45bcSDavid Daney unreachable(); \ 70b8b572e1SStephen Rothwell } while (0) 71*db87a719SChristophe Leroy #define HAVE_ARCH_BUG 72b8b572e1SStephen Rothwell 73*db87a719SChristophe Leroy #define __WARN_FLAGS(flags) BUG_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags)) 74*db87a719SChristophe Leroy 75*db87a719SChristophe Leroy #ifdef CONFIG_PPC64 76b8b572e1SStephen Rothwell #define BUG_ON(x) do { \ 77b8b572e1SStephen Rothwell if (__builtin_constant_p(x)) { \ 78b8b572e1SStephen Rothwell if (x) \ 79b8b572e1SStephen Rothwell BUG(); \ 80b8b572e1SStephen Rothwell } else { \ 8143f003bbSChristophe Leroy BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \ 82b8b572e1SStephen Rothwell } \ 83b8b572e1SStephen Rothwell } while (0) 84b8b572e1SStephen Rothwell 85b8b572e1SStephen Rothwell #define WARN_ON(x) ({ \ 86b8b572e1SStephen Rothwell int __ret_warn_on = !!(x); \ 87b8b572e1SStephen Rothwell if (__builtin_constant_p(__ret_warn_on)) { \ 88b8b572e1SStephen Rothwell if (__ret_warn_on) \ 89b8b572e1SStephen Rothwell __WARN(); \ 90b8b572e1SStephen Rothwell } else { \ 9143f003bbSChristophe Leroy BUG_ENTRY(PPC_TLNEI " %4, 0", \ 9243f003bbSChristophe Leroy BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \ 93b8b572e1SStephen Rothwell "r" (__ret_warn_on)); \ 94b8b572e1SStephen Rothwell } \ 95b8b572e1SStephen Rothwell unlikely(__ret_warn_on); \ 96b8b572e1SStephen Rothwell }) 97b8b572e1SStephen Rothwell 98b8b572e1SStephen Rothwell #define HAVE_ARCH_BUG_ON 99b8b572e1SStephen Rothwell #define HAVE_ARCH_WARN_ON 100*db87a719SChristophe Leroy #endif 101*db87a719SChristophe Leroy 102b8b572e1SStephen Rothwell #endif /* __ASSEMBLY __ */ 103a58f053bSBenjamin Herrenschmidt #else 104a58f053bSBenjamin Herrenschmidt #ifdef __ASSEMBLY__ 105a58f053bSBenjamin Herrenschmidt .macro EMIT_BUG_ENTRY addr,file,line,flags 106a58f053bSBenjamin Herrenschmidt .endm 107a58f053bSBenjamin Herrenschmidt #else /* !__ASSEMBLY__ */ 108a58f053bSBenjamin Herrenschmidt #define _EMIT_BUG_ENTRY 109a58f053bSBenjamin Herrenschmidt #endif 110b8b572e1SStephen Rothwell #endif /* CONFIG_BUG */ 111b8b572e1SStephen Rothwell 112b8b572e1SStephen Rothwell #include <asm-generic/bug.h> 113b8b572e1SStephen Rothwell 114ae3a197eSDavid Howells #ifndef __ASSEMBLY__ 115ae3a197eSDavid Howells 116ae3a197eSDavid Howells struct pt_regs; 117c45ba4f4SNicholas Piggin void hash__do_page_fault(struct pt_regs *); 1188458c628SNicholas Piggin void bad_page_fault(struct pt_regs *, int); 119ae3a197eSDavid Howells extern void _exception(int, struct pt_regs *, int, unsigned long); 1205d8fb8a5SEric W. Biederman extern void _exception_pkey(struct pt_regs *, unsigned long, int); 121ae3a197eSDavid Howells extern void die(const char *, struct pt_regs *, long); 122209e9d50SNicholas Piggin void die_mce(const char *str, struct pt_regs *regs, long err); 1236fcd6baaSNicholas Piggin extern bool die_will_crash(void); 12435adacd6SNicholas Piggin extern void panic_flush_kmsg_start(void); 12535adacd6SNicholas Piggin extern void panic_flush_kmsg_end(void); 126ae3a197eSDavid Howells #endif /* !__ASSEMBLY__ */ 127ae3a197eSDavid Howells 128b8b572e1SStephen Rothwell #endif /* __KERNEL__ */ 129b8b572e1SStephen Rothwell #endif /* _ASM_POWERPC_BUG_H */ 130