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1/*
2 * CRIS 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 */
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20#include "config.h"
21#include "qemu-common.h"
22#include "exec/gdbstub.h"
213c19d6 23
90431220 24int crisv10_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
213c19d6 25{
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26 CRISCPU *cpu = CRIS_CPU(cs);
27 CPUCRISState *env = &cpu->env;
28
213c19d6 29 if (n < 15) {
986a2998 30 return gdb_get_reg32(mem_buf, env->regs[n]);
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31 }
32
33 if (n == 15) {
986a2998 34 return gdb_get_reg32(mem_buf, env->pc);
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35 }
36
37 if (n < 32) {
38 switch (n) {
39 case 16:
986a2998 40 return gdb_get_reg8(mem_buf, env->pregs[n - 16]);
213c19d6 41 case 17:
986a2998 42 return gdb_get_reg8(mem_buf, env->pregs[n - 16]);
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43 case 20:
44 case 21:
986a2998 45 return gdb_get_reg16(mem_buf, env->pregs[n - 16]);
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46 default:
47 if (n >= 23) {
986a2998 48 return gdb_get_reg32(mem_buf, env->pregs[n - 16]);
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49 }
50 break;
51 }
52 }
53 return 0;
54}
55
5b50e790 56int cris_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
213c19d6 57{
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58 CRISCPU *cpu = CRIS_CPU(cs);
59 CPUCRISState *env = &cpu->env;
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60 uint8_t srs;
61
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62 srs = env->pregs[PR_SRS];
63 if (n < 16) {
986a2998 64 return gdb_get_reg32(mem_buf, env->regs[n]);
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65 }
66
67 if (n >= 21 && n < 32) {
986a2998 68 return gdb_get_reg32(mem_buf, env->pregs[n - 16]);
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69 }
70 if (n >= 33 && n < 49) {
986a2998 71 return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]);
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72 }
73 switch (n) {
74 case 16:
986a2998 75 return gdb_get_reg8(mem_buf, env->pregs[0]);
213c19d6 76 case 17:
986a2998 77 return gdb_get_reg8(mem_buf, env->pregs[1]);
213c19d6 78 case 18:
986a2998 79 return gdb_get_reg32(mem_buf, env->pregs[2]);
213c19d6 80 case 19:
986a2998 81 return gdb_get_reg8(mem_buf, srs);
213c19d6 82 case 20:
986a2998 83 return gdb_get_reg16(mem_buf, env->pregs[4]);
213c19d6 84 case 32:
986a2998 85 return gdb_get_reg32(mem_buf, env->pc);
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86 }
87
88 return 0;
89}
90
5b50e790 91int cris_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
213c19d6 92{
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93 CRISCPU *cpu = CRIS_CPU(cs);
94 CPUCRISState *env = &cpu->env;
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95 uint32_t tmp;
96
97 if (n > 49) {
98 return 0;
99 }
100
101 tmp = ldl_p(mem_buf);
102
103 if (n < 16) {
104 env->regs[n] = tmp;
105 }
106
107 if (n >= 21 && n < 32) {
108 env->pregs[n - 16] = tmp;
109 }
110
111 /* FIXME: Should support function regs be writable? */
112 switch (n) {
113 case 16:
114 return 1;
115 case 17:
116 return 1;
117 case 18:
118 env->pregs[PR_PID] = tmp;
119 break;
120 case 19:
121 return 1;
122 case 20:
123 return 2;
124 case 32:
125 env->pc = tmp;
126 break;
127 }
128
129 return 4;
130}