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,\"aw\"\n" \ 32 "2:\t" ASM_WORD_INSN "1b, %c0\n" \ 33 "\t.short %c1, %c2\n" \ 34 "\t.org 2b+%c3\n" \ 35 "\t.popsection" \ 36 : : "i" (__FILE__), "i" (__LINE__), \ 37 "i" (0), "i" (sizeof(struct bug_entry)) ); \ 38 unreachable(); \ 39 } while(0) 40 41 #else 42 #define BUG() \ 43 do { \ 44 asm volatile(PARISC_BUG_BREAK_ASM : : ); \ 45 unreachable(); \ 46 } while(0) 47 #endif 48 49 #ifdef CONFIG_DEBUG_BUGVERBOSE 50 #define __WARN_FLAGS(flags) \ 51 do { \ 52 asm volatile("\n" \ 53 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 54 "\t.pushsection __bug_table,\"aw\"\n" \ 55 "2:\t" ASM_WORD_INSN "1b, %c0\n" \ 56 "\t.short %c1, %c2\n" \ 57 "\t.org 2b+%c3\n" \ 58 "\t.popsection" \ 59 : : "i" (__FILE__), "i" (__LINE__), \ 60 "i" (BUGFLAG_WARNING|(flags)), \ 61 "i" (sizeof(struct bug_entry)) ); \ 62 } while(0) 63 #else 64 #define __WARN_FLAGS(flags) \ 65 do { \ 66 asm volatile("\n" \ 67 "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 68 "\t.pushsection __bug_table,\"aw\"\n" \ 69 "2:\t" ASM_WORD_INSN "1b\n" \ 70 "\t.short %c0\n" \ 71 "\t.org 2b+%c1\n" \ 72 "\t.popsection" \ 73 : : "i" (BUGFLAG_WARNING|(flags)), \ 74 "i" (sizeof(struct bug_entry)) ); \ 75 } while(0) 76 #endif 77 78 79 #define WARN_ON(x) ({ \ 80 int __ret_warn_on = !!(x); \ 81 if (__builtin_constant_p(__ret_warn_on)) { \ 82 if (__ret_warn_on) \ 83 __WARN(); \ 84 } else { \ 85 if (unlikely(__ret_warn_on)) \ 86 __WARN(); \ 87 } \ 88 unlikely(__ret_warn_on); \ 89 }) 90 91 #endif 92 93 #include <asm-generic/bug.h> 94 #endif 95 96