1 /* SPDX-License-Identifier: GPL-2.0-only */ 1
2 /*
3 * Copyright (C) 2012 Regents of the Universit
4 */
5
6 #ifndef _ASM_RISCV_BUG_H
7 #define _ASM_RISCV_BUG_H
8
9 #include <linux/compiler.h>
10 #include <linux/const.h>
11 #include <linux/types.h>
12
13 #include <asm/asm.h>
14
15 #define __INSN_LENGTH_MASK _UL(0x3)
16 #define __INSN_LENGTH_32 _UL(0x3)
17 #define __COMPRESSED_INSN_MASK _UL(0xffff)
18
19 #define __BUG_INSN_32 _UL(0x00100073) /* ebr
20 #define __BUG_INSN_16 _UL(0x9002) /* c.ebrea
21
22 #define GET_INSN_LENGTH(insn)
23 ({
24 unsigned long __len;
25 __len = ((insn & __INSN_LENGTH_MASK) =
26 4UL : 2UL;
27 __len;
28 })
29
30 typedef u32 bug_insn_t;
31
32 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
33 #define __BUG_ENTRY_ADDR RISCV_INT " 1b
34 #define __BUG_ENTRY_FILE RISCV_INT " %0
35 #else
36 #define __BUG_ENTRY_ADDR RISCV_PTR " 1b
37 #define __BUG_ENTRY_FILE RISCV_PTR " %0
38 #endif
39
40 #ifdef CONFIG_DEBUG_BUGVERBOSE
41 #define __BUG_ENTRY \
42 __BUG_ENTRY_ADDR "\n\t" \
43 __BUG_ENTRY_FILE "\n\t" \
44 RISCV_SHORT " %1\n\t" \
45 RISCV_SHORT " %2"
46 #else
47 #define __BUG_ENTRY \
48 __BUG_ENTRY_ADDR "\n\t" \
49 RISCV_SHORT " %2"
50 #endif
51
52 #ifdef CONFIG_GENERIC_BUG
53 #define __BUG_FLAGS(flags)
54 do {
55 __asm__ __volatile__ (
56 "1:\n\t"
57 "ebreak\n"
58 ".pushsection __bug_ta
59 "2:\n\t"
60 __BUG_ENTRY "\n\t"
61 ".org 2b + %3\n\t"
62 ".popsection"
63 :
64 : "i" (__FILE__), "i" (__LINE_
65 "i" (flags),
66 "i" (sizeof(struct bug_entry
67 } while (0)
68 #else /* CONFIG_GENERIC_BUG */
69 #define __BUG_FLAGS(flags) do {
70 __asm__ __volatile__ ("ebreak\n");
71 } while (0)
72 #endif /* CONFIG_GENERIC_BUG */
73
74 #define BUG() do {
75 __BUG_FLAGS(0);
76 unreachable();
77 } while (0)
78
79 #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLA
80
81 #define HAVE_ARCH_BUG
82
83 #include <asm-generic/bug.h>
84
85 struct pt_regs;
86 struct task_struct;
87
88 void __show_regs(struct pt_regs *regs);
89 void die(struct pt_regs *regs, const char *str
90 void do_trap(struct pt_regs *regs, int signo,
91
92 #endif /* _ASM_RISCV_BUG_H */
93
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