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-rw-r--r--arch/powerpc/include/asm/bug.h175
1 files changed, 175 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/bug.h b/arch/powerpc/include/asm/bug.h
new file mode 100644
index 000000000..61a473635
--- /dev/null
+++ b/arch/powerpc/include/asm/bug.h
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_BUG_H
+#define _ASM_POWERPC_BUG_H
+#ifdef __KERNEL__
+
+#include <asm/asm-compat.h>
+#include <asm/extable.h>
+
+#ifdef CONFIG_BUG
+
+#ifdef __ASSEMBLY__
+#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 */
+
+.macro EMIT_WARN_ENTRY addr,file,line,flags
+ EX_TABLE(\addr,\addr+4)
+ __EMIT_BUG_ENTRY \addr,\file,\line,\flags
+.endm
+
+.macro EMIT_BUG_ENTRY addr,file,line,flags
+ .if \flags & 1 /* BUGFLAG_WARNING */
+ .err /* Use EMIT_WARN_ENTRY for warnings */
+ .endif
+ __EMIT_BUG_ENTRY \addr,\file,\line,\flags
+.endm
+
+#else /* !__ASSEMBLY__ */
+/* _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(insn, flags, ...) \
+ __asm__ __volatile__( \
+ "1: " insn "\n" \
+ _EMIT_BUG_ENTRY \
+ : : "i" (__FILE__), "i" (__LINE__), \
+ "i" (flags), \
+ "i" (sizeof(struct bug_entry)), \
+ ##__VA_ARGS__)
+
+#define WARN_ENTRY(insn, flags, label, ...) \
+ asm_volatile_goto( \
+ "1: " insn "\n" \
+ EX_TABLE(1b, %l[label]) \
+ _EMIT_BUG_ENTRY \
+ : : "i" (__FILE__), "i" (__LINE__), \
+ "i" (flags), \
+ "i" (sizeof(struct bug_entry)), \
+ ##__VA_ARGS__ : : label)
+
+/*
+ * 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(flags) do { \
+ __label__ __label_warn_on; \
+ \
+ WARN_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags), __label_warn_on); \
+ unreachable(); \
+ \
+__label_warn_on: \
+ break; \
+} while (0)
+
+#ifdef CONFIG_PPC64
+#define BUG_ON(x) do { \
+ if (__builtin_constant_p(x)) { \
+ if (x) \
+ BUG(); \
+ } else { \
+ BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \
+ } \
+} while (0)
+
+#define WARN_ON(x) ({ \
+ bool __ret_warn_on = false; \
+ do { \
+ if (__builtin_constant_p((x))) { \
+ if (!(x)) \
+ break; \
+ __WARN(); \
+ __ret_warn_on = true; \
+ } else { \
+ __label__ __label_warn_on; \
+ \
+ WARN_ENTRY(PPC_TLNEI " %4, 0", \
+ BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \
+ __label_warn_on, \
+ "r" ((__force long)(x))); \
+ break; \
+__label_warn_on: \
+ __ret_warn_on = true; \
+ } \
+ } while (0); \
+ unlikely(__ret_warn_on); \
+})
+
+#define HAVE_ARCH_BUG_ON
+#define HAVE_ARCH_WARN_ON
+#endif
+
+#endif /* __ASSEMBLY __ */
+#else
+#ifdef __ASSEMBLY__
+.macro EMIT_BUG_ENTRY addr,file,line,flags
+.endm
+.macro EMIT_WARN_ENTRY addr,file,line,flags
+.endm
+#else /* !__ASSEMBLY__ */
+#define _EMIT_BUG_ENTRY
+#define _EMIT_WARN_ENTRY
+#endif
+#endif /* CONFIG_BUG */
+
+#include <asm-generic/bug.h>
+
+#ifndef __ASSEMBLY__
+
+struct pt_regs;
+void hash__do_page_fault(struct pt_regs *);
+void bad_page_fault(struct pt_regs *, int);
+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 /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_BUG_H */