1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _PARISC_BUG_H 3*4882a593Smuzhiyun #define _PARISC_BUG_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/kernel.h> /* for BUGFLAG_TAINT */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * Tell the user there is some problem. 9*4882a593Smuzhiyun * The offending file and line are encoded in the __bug_table section. 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifdef CONFIG_BUG 13*4882a593Smuzhiyun #define HAVE_ARCH_BUG 14*4882a593Smuzhiyun #define HAVE_ARCH_WARN_ON 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* the break instruction is used as BUG() marker. */ 17*4882a593Smuzhiyun #define PARISC_BUG_BREAK_ASM "break 0x1f, 0x1fff" 18*4882a593Smuzhiyun #define PARISC_BUG_BREAK_INSN 0x03ffe01f /* PARISC_BUG_BREAK_ASM */ 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #if defined(CONFIG_64BIT) 21*4882a593Smuzhiyun #define ASM_WORD_INSN ".dword\t" 22*4882a593Smuzhiyun #else 23*4882a593Smuzhiyun #define ASM_WORD_INSN ".word\t" 24*4882a593Smuzhiyun #endif 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #ifdef CONFIG_DEBUG_BUGVERBOSE 27*4882a593Smuzhiyun #define BUG() \ 28*4882a593Smuzhiyun do { \ 29*4882a593Smuzhiyun asm volatile("\n" \ 30*4882a593Smuzhiyun "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 31*4882a593Smuzhiyun "\t.pushsection __bug_table,\"aw\"\n" \ 32*4882a593Smuzhiyun "2:\t" ASM_WORD_INSN "1b, %c0\n" \ 33*4882a593Smuzhiyun "\t.short %c1, %c2\n" \ 34*4882a593Smuzhiyun "\t.org 2b+%c3\n" \ 35*4882a593Smuzhiyun "\t.popsection" \ 36*4882a593Smuzhiyun : : "i" (__FILE__), "i" (__LINE__), \ 37*4882a593Smuzhiyun "i" (0), "i" (sizeof(struct bug_entry)) ); \ 38*4882a593Smuzhiyun unreachable(); \ 39*4882a593Smuzhiyun } while(0) 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun #else 42*4882a593Smuzhiyun #define BUG() \ 43*4882a593Smuzhiyun do { \ 44*4882a593Smuzhiyun asm volatile(PARISC_BUG_BREAK_ASM : : ); \ 45*4882a593Smuzhiyun unreachable(); \ 46*4882a593Smuzhiyun } while(0) 47*4882a593Smuzhiyun #endif 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun #ifdef CONFIG_DEBUG_BUGVERBOSE 50*4882a593Smuzhiyun #define __WARN_FLAGS(flags) \ 51*4882a593Smuzhiyun do { \ 52*4882a593Smuzhiyun asm volatile("\n" \ 53*4882a593Smuzhiyun "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 54*4882a593Smuzhiyun "\t.pushsection __bug_table,\"aw\"\n" \ 55*4882a593Smuzhiyun "2:\t" ASM_WORD_INSN "1b, %c0\n" \ 56*4882a593Smuzhiyun "\t.short %c1, %c2\n" \ 57*4882a593Smuzhiyun "\t.org 2b+%c3\n" \ 58*4882a593Smuzhiyun "\t.popsection" \ 59*4882a593Smuzhiyun : : "i" (__FILE__), "i" (__LINE__), \ 60*4882a593Smuzhiyun "i" (BUGFLAG_WARNING|(flags)), \ 61*4882a593Smuzhiyun "i" (sizeof(struct bug_entry)) ); \ 62*4882a593Smuzhiyun } while(0) 63*4882a593Smuzhiyun #else 64*4882a593Smuzhiyun #define __WARN_FLAGS(flags) \ 65*4882a593Smuzhiyun do { \ 66*4882a593Smuzhiyun asm volatile("\n" \ 67*4882a593Smuzhiyun "1:\t" PARISC_BUG_BREAK_ASM "\n" \ 68*4882a593Smuzhiyun "\t.pushsection __bug_table,\"aw\"\n" \ 69*4882a593Smuzhiyun "2:\t" ASM_WORD_INSN "1b\n" \ 70*4882a593Smuzhiyun "\t.short %c0\n" \ 71*4882a593Smuzhiyun "\t.org 2b+%c1\n" \ 72*4882a593Smuzhiyun "\t.popsection" \ 73*4882a593Smuzhiyun : : "i" (BUGFLAG_WARNING|(flags)), \ 74*4882a593Smuzhiyun "i" (sizeof(struct bug_entry)) ); \ 75*4882a593Smuzhiyun } while(0) 76*4882a593Smuzhiyun #endif 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun #define WARN_ON(x) ({ \ 80*4882a593Smuzhiyun int __ret_warn_on = !!(x); \ 81*4882a593Smuzhiyun if (__builtin_constant_p(__ret_warn_on)) { \ 82*4882a593Smuzhiyun if (__ret_warn_on) \ 83*4882a593Smuzhiyun __WARN(); \ 84*4882a593Smuzhiyun } else { \ 85*4882a593Smuzhiyun if (unlikely(__ret_warn_on)) \ 86*4882a593Smuzhiyun __WARN(); \ 87*4882a593Smuzhiyun } \ 88*4882a593Smuzhiyun unlikely(__ret_warn_on); \ 89*4882a593Smuzhiyun }) 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun #endif 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun #include <asm-generic/bug.h> 94*4882a593Smuzhiyun #endif 95*4882a593Smuzhiyun 96