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/*
* TriCore gdb server stub
*
* Copyright (c) 2019 Bastian Koppelmann, Paderborn University
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "gdbstub/helpers.h"
#define LCX_REGNUM 32
#define FCX_REGNUM 33
#define PCXI_REGNUM 34
#define TRICORE_PSW_REGNUM 35
#define TRICORE_PC_REGNUM 36
#define ICR_REGNUM 37
#define ISP_REGNUM 38
#define BTV_REGNUM 39
#define BIV_REGNUM 40
#define SYSCON_REGNUM 41
#define PMUCON0_REGNUM 42
#define DMUCON_REGNUM 43
static uint32_t tricore_cpu_gdb_read_csfr(CPUTriCoreState *env, int n)
{
switch (n) {
case LCX_REGNUM:
return env->LCX;
case FCX_REGNUM:
return env->FCX;
case PCXI_REGNUM:
return env->PCXI;
case TRICORE_PSW_REGNUM:
return psw_read(env);
case TRICORE_PC_REGNUM:
return env->PC;
case ICR_REGNUM:
return env->ICR;
case ISP_REGNUM:
return env->ISP;
case BTV_REGNUM:
return env->BTV;
case BIV_REGNUM:
return env->BIV;
case SYSCON_REGNUM:
return env->SYSCON;
case PMUCON0_REGNUM:
return 0; /* PMUCON0 */
case DMUCON_REGNUM:
return 0; /* DMUCON0 */
default:
return 0;
}
}
static void tricore_cpu_gdb_write_csfr(CPUTriCoreState *env, int n,
uint32_t val)
{
switch (n) {
case LCX_REGNUM:
env->LCX = val;
break;
case FCX_REGNUM:
env->FCX = val;
break;
case PCXI_REGNUM:
env->PCXI = val;
break;
case TRICORE_PSW_REGNUM:
psw_write(env, val);
break;
case TRICORE_PC_REGNUM:
env->PC = val;
break;
case ICR_REGNUM:
env->ICR = val;
break;
case ISP_REGNUM:
env->ISP = val;
break;
case BTV_REGNUM:
env->BTV = val;
break;
case BIV_REGNUM:
env->BIV = val;
break;
case SYSCON_REGNUM:
env->SYSCON = val;
break;
}
}
int tricore_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
if (n < 16) { /* data registers */
return gdb_get_reg32(mem_buf, env->gpr_d[n]);
} else if (n < 32) { /* address registers */
return gdb_get_reg32(mem_buf, env->gpr_a[n - 16]);
} else { /* csfr */
return gdb_get_reg32(mem_buf, tricore_cpu_gdb_read_csfr(env, n));
}
return 0;
}
int tricore_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
uint32_t tmp;
tmp = ldl_p(mem_buf);
if (n < 16) { /* data registers */
env->gpr_d[n] = tmp;
} else if (n < 32) { /* address registers */
env->gpr_a[n - 16] = tmp;
} else {
tricore_cpu_gdb_write_csfr(env, n, tmp);
}
return 4;
}
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