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25d8ac0e AF |
1 | /* |
2 | * Xtensa gdb server stub | |
3 | * | |
4 | * Copyright (c) 2003-2005 Fabrice Bellard | |
5 | * Copyright (c) 2013 SUSE LINUX Products GmbH | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | static int cpu_gdb_read_register(CPUXtensaState *env, uint8_t *mem_buf, int n) | |
22 | { | |
23 | const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n; | |
24 | ||
25 | if (n < 0 || n >= env->config->gdb_regmap.num_regs) { | |
26 | return 0; | |
27 | } | |
28 | ||
29 | switch (reg->type) { | |
30 | case 9: /*pc*/ | |
986a2998 | 31 | return gdb_get_reg32(mem_buf, env->pc); |
25d8ac0e AF |
32 | |
33 | case 1: /*ar*/ | |
34 | xtensa_sync_phys_from_window(env); | |
986a2998 AF |
35 | return gdb_get_reg32(mem_buf, env->phys_regs[(reg->targno & 0xff) |
36 | % env->config->nareg]); | |
25d8ac0e AF |
37 | |
38 | case 2: /*SR*/ | |
986a2998 | 39 | return gdb_get_reg32(mem_buf, env->sregs[reg->targno & 0xff]); |
25d8ac0e AF |
40 | |
41 | case 3: /*UR*/ | |
986a2998 | 42 | return gdb_get_reg32(mem_buf, env->uregs[reg->targno & 0xff]); |
25d8ac0e AF |
43 | |
44 | case 4: /*f*/ | |
986a2998 AF |
45 | return gdb_get_reg32(mem_buf, float32_val(env->fregs[reg->targno |
46 | & 0x0f])); | |
25d8ac0e AF |
47 | |
48 | case 8: /*a*/ | |
986a2998 | 49 | return gdb_get_reg32(mem_buf, env->regs[reg->targno & 0x0f]); |
25d8ac0e AF |
50 | |
51 | default: | |
52 | qemu_log("%s from reg %d of unsupported type %d\n", | |
53 | __func__, n, reg->type); | |
54 | return 0; | |
55 | } | |
56 | } | |
57 | ||
58 | static int cpu_gdb_write_register(CPUXtensaState *env, uint8_t *mem_buf, int n) | |
59 | { | |
60 | uint32_t tmp; | |
61 | const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n; | |
62 | ||
63 | if (n < 0 || n >= env->config->gdb_regmap.num_regs) { | |
64 | return 0; | |
65 | } | |
66 | ||
67 | tmp = ldl_p(mem_buf); | |
68 | ||
69 | switch (reg->type) { | |
70 | case 9: /*pc*/ | |
71 | env->pc = tmp; | |
72 | break; | |
73 | ||
74 | case 1: /*ar*/ | |
75 | env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp; | |
76 | xtensa_sync_window_from_phys(env); | |
77 | break; | |
78 | ||
79 | case 2: /*SR*/ | |
80 | env->sregs[reg->targno & 0xff] = tmp; | |
81 | break; | |
82 | ||
83 | case 3: /*UR*/ | |
84 | env->uregs[reg->targno & 0xff] = tmp; | |
85 | break; | |
86 | ||
87 | case 4: /*f*/ | |
88 | env->fregs[reg->targno & 0x0f] = make_float32(tmp); | |
89 | break; | |
90 | ||
91 | case 8: /*a*/ | |
92 | env->regs[reg->targno & 0x0f] = tmp; | |
93 | break; | |
94 | ||
95 | default: | |
96 | qemu_log("%s to reg %d of unsupported type %d\n", | |
97 | __func__, n, reg->type); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | return 4; | |
102 | } |