4 * Copyright (c) 2003-2005 Fabrice Bellard
5 * Copyright (c) 2013 SUSE LINUX Products GmbH
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.
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.
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/>.
21 #include "qemu-common.h"
22 #include "exec/gdbstub.h"
24 int mips_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
26 MIPSCPU *cpu = MIPS_CPU(cs);
27 CPUMIPSState *env = &cpu->env;
30 return gdb_get_regl(mem_buf, env->active_tc.gpr[n]);
32 if (env->CP0_Config1 & (1 << CP0C1_FP)) {
33 if (n >= 38 && n < 70) {
34 if (env->CP0_Status & (1 << CP0St_FR)) {
35 return gdb_get_regl(mem_buf,
36 env->active_fpu.fpr[n - 38].d);
38 return gdb_get_regl(mem_buf,
39 env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX]);
44 return gdb_get_regl(mem_buf, (int32_t)env->active_fpu.fcr31);
46 return gdb_get_regl(mem_buf, (int32_t)env->active_fpu.fcr0);
51 return gdb_get_regl(mem_buf, (int32_t)env->CP0_Status);
53 return gdb_get_regl(mem_buf, env->active_tc.LO[0]);
55 return gdb_get_regl(mem_buf, env->active_tc.HI[0]);
57 return gdb_get_regl(mem_buf, env->CP0_BadVAddr);
59 return gdb_get_regl(mem_buf, (int32_t)env->CP0_Cause);
61 return gdb_get_regl(mem_buf, env->active_tc.PC |
62 !!(env->hflags & MIPS_HFLAG_M16));
64 return gdb_get_regl(mem_buf, 0); /* fp */
66 return gdb_get_regl(mem_buf, (int32_t)env->CP0_PRid);
68 if (n >= 73 && n <= 88) {
69 /* 16 embedded regs. */
70 return gdb_get_regl(mem_buf, 0);
76 /* convert MIPS rounding mode in FCR31 to IEEE library */
77 static unsigned int ieee_rm[] = {
78 float_round_nearest_even,
83 #define RESTORE_ROUNDING_MODE \
84 set_float_rounding_mode(ieee_rm[env->active_fpu.fcr31 & 3], \
85 &env->active_fpu.fp_status)
87 int mips_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
89 MIPSCPU *cpu = MIPS_CPU(cs);
90 CPUMIPSState *env = &cpu->env;
93 tmp = ldtul_p(mem_buf);
96 env->active_tc.gpr[n] = tmp;
97 return sizeof(target_ulong);
99 if (env->CP0_Config1 & (1 << CP0C1_FP)
100 && n >= 38 && n < 73) {
102 if (env->CP0_Status & (1 << CP0St_FR)) {
103 env->active_fpu.fpr[n - 38].d = tmp;
105 env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX] = tmp;
110 env->active_fpu.fcr31 = tmp & 0xFF83FFFF;
111 /* set rounding mode */
112 RESTORE_ROUNDING_MODE;
115 env->active_fpu.fcr0 = tmp;
118 return sizeof(target_ulong);
122 env->CP0_Status = tmp;
125 env->active_tc.LO[0] = tmp;
128 env->active_tc.HI[0] = tmp;
131 env->CP0_BadVAddr = tmp;
134 env->CP0_Cause = tmp;
137 env->active_tc.PC = tmp & ~(target_ulong)1;
139 env->hflags |= MIPS_HFLAG_M16;
141 env->hflags &= ~(MIPS_HFLAG_M16);
144 case 72: /* fp, ignored */
150 /* Other registers are readonly. Ignore writes. */
154 return sizeof(target_ulong);