2 * Copyright (C) 2013 Huawei Ltd.
3 * Author: Jiang Liu <liuj97@gmail.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/types.h>
22 * ARM Architecture Reference Manual for ARMv8 Profile-A, Issue A.a
23 * Section C3.1 "A64 instruction index by encoding":
24 * AArch64 main encoding table
26 * 28 27 26 25 Encoding Group
28 * 1 0 0 - Data processing, immediate
29 * 1 0 1 - Branch, exception generation and system instructions
30 * - 1 - 0 Loads and stores
31 * - 1 0 1 Data processing - register
32 * 0 1 1 1 Data processing - SIMD and floating point
33 * 1 1 1 1 Data processing - SIMD and floating point
34 * "-" means "don't care"
36 enum aarch64_insn_encoding_class {
37 AARCH64_INSN_CLS_UNKNOWN, /* UNALLOCATED */
38 AARCH64_INSN_CLS_DP_IMM, /* Data processing - immediate */
39 AARCH64_INSN_CLS_DP_REG, /* Data processing - register */
40 AARCH64_INSN_CLS_DP_FPSIMD, /* Data processing - SIMD and FP */
41 AARCH64_INSN_CLS_LDST, /* Loads and stores */
42 AARCH64_INSN_CLS_BR_SYS, /* Branch, exception generation and
43 * system instructions */
46 enum aarch64_insn_hint_op {
47 AARCH64_INSN_HINT_NOP = 0x0 << 5,
48 AARCH64_INSN_HINT_YIELD = 0x1 << 5,
49 AARCH64_INSN_HINT_WFE = 0x2 << 5,
50 AARCH64_INSN_HINT_WFI = 0x3 << 5,
51 AARCH64_INSN_HINT_SEV = 0x4 << 5,
52 AARCH64_INSN_HINT_SEVL = 0x5 << 5,
55 #define __AARCH64_INSN_FUNCS(abbr, mask, val) \
56 static __always_inline bool aarch64_insn_is_##abbr(u32 code) \
57 { return (code & (mask)) == (val); } \
58 static __always_inline u32 aarch64_insn_get_##abbr##_value(void) \
61 __AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000)
62 __AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000)
63 __AARCH64_INSN_FUNCS(svc, 0xFFE0001F, 0xD4000001)
64 __AARCH64_INSN_FUNCS(hvc, 0xFFE0001F, 0xD4000002)
65 __AARCH64_INSN_FUNCS(smc, 0xFFE0001F, 0xD4000003)
66 __AARCH64_INSN_FUNCS(brk, 0xFFE0001F, 0xD4200000)
67 __AARCH64_INSN_FUNCS(hint, 0xFFFFF01F, 0xD503201F)
69 #undef __AARCH64_INSN_FUNCS
71 bool aarch64_insn_is_nop(u32 insn);
73 enum aarch64_insn_encoding_class aarch64_get_insn_class(u32 insn);
75 bool aarch64_insn_hotpatch_safe(u32 old_insn, u32 new_insn);
77 #endif /* __ASM_INSN_H */