1 | /* |
2 | * ARM load/store instructions for code (armeb-user support) |
3 | * |
4 | * Copyright (c) 2012 CodeSourcery, LLC |
5 | * |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2 of the License, or (at your option) any later version. |
10 | * |
11 | * This library is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Lesser General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Lesser General Public |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
18 | */ |
19 | |
20 | #ifndef ARM_LDST_H |
21 | #define ARM_LDST_H |
22 | |
23 | #include "exec/cpu_ldst.h" |
24 | #include "qemu/bswap.h" |
25 | |
26 | /* Load an instruction and return it in the standard little-endian order */ |
27 | static inline uint32_t arm_ldl_code(CPUARMState *env, target_ulong addr, |
28 | bool sctlr_b) |
29 | { |
30 | uint32_t insn = cpu_ldl_code(env, addr); |
31 | if (bswap_code(sctlr_b)) { |
32 | return bswap32(insn); |
33 | } |
34 | return insn; |
35 | } |
36 | |
37 | /* Ditto, for a halfword (Thumb) instruction */ |
38 | static inline uint16_t arm_lduw_code(CPUARMState *env, target_ulong addr, |
39 | bool sctlr_b) |
40 | { |
41 | uint16_t insn; |
42 | #ifndef CONFIG_USER_ONLY |
43 | /* In big-endian (BE32) mode, adjacent Thumb instructions have been swapped |
44 | within each word. Undo that now. */ |
45 | if (sctlr_b) { |
46 | addr ^= 2; |
47 | } |
48 | #endif |
49 | insn = cpu_lduw_code(env, addr); |
50 | if (bswap_code(sctlr_b)) { |
51 | return bswap16(insn); |
52 | } |
53 | return insn; |
54 | } |
55 | |
56 | #endif |
57 | |