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,\"a\"\n" \ 32 "\t.align %4\n" \ 33 "2:\t" ASM_WORD_INSN "1b, %c0\n" \ 34 "\t.short %1, %2\n" \ 35 "\t.blockz %3-2*%4-2*2\n" \ 36 "\t.popsection" \ 37 : : "i" (__FILE__), "i" (__LINE__), \ 38 "i" (0), "i" (sizeof(struct bug_entry)), \ 39 "i" (sizeof(long)) ); \ 40 unreachable(); \ 41 } while(0) 42 43 #else 44 #define BUG() \ 45 do { \ 46 asm volatile(PARISC_BUG_BREAK_ASM : : ); \ 47 unreachable(); \ 48 } while(0) 49 #endif 50 51 #ifdef CONFIG_DEBUG_BUGVERBOSE 52 #define __WARN_FLAGS(flags) \ 53 do { \ 54 asm volatile("\n" \ 55 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 56 "\t.pushsection __bug_table,\"a\"\n" \ 57 "\t.align %4\n" \ 58 "2:\t" ASM_WORD_INSN "1b, %c0\n" \ 59 "\t.short %1, %2\n" \ 60 "\t.blockz %3-2*%4-2*2\n" \ 61 "\t.popsection" \ 62 : : "i" (__FILE__), "i" (__LINE__), \ 63 "i" (BUGFLAG_WARNING|(flags)), \ 64 "i" (sizeof(struct bug_entry)), \ 65 "i" (sizeof(long)) ); \ 66 } while(0) 67 #else 68 #define __WARN_FLAGS(flags) \ 69 do { \ 70 asm volatile("\n" \ 71 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 72 "\t.pushsection __bug_table,\"a\"\n" \ 73 "\t.align %2\n" \ 74 "2:\t" ASM_WORD_INSN "1b\n" \ 75 "\t.short %0\n" \ 76 "\t.blockz %1-%2-2\n" \ 77 "\t.popsection" \ 78 : : "i" (BUGFLAG_WARNING|(flags)), \ 79 "i" (sizeof(struct bug_entry)), \ 80 "i" (sizeof(long)) ); \ 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