LXR qemu/target/tricore/gdbstub.c

   1/*
   2 * TriCore gdb server stub
   3 *
   4 * Copyright (c) 2019 Bastian Koppelmann, Paderborn University
   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#include "qemu/osdep.h"
  21#include "qemu-common.h"
  22#include "exec/gdbstub.h"
  23
  24
  25#define LCX_REGNUM         32
  26#define FCX_REGNUM         33
  27#define PCXI_REGNUM        34
  28#define TRICORE_PSW_REGNUM 35
  29#define TRICORE_PC_REGNUM  36
  30#define ICR_REGNUM         37
  31#define ISP_REGNUM         38
  32#define BTV_REGNUM         39
  33#define BIV_REGNUM         40
  34#define SYSCON_REGNUM      41
  35#define PMUCON0_REGNUM     42
  36#define DMUCON_REGNUM      43
  37
  38static uint32_t tricore_cpu_gdb_read_csfr(CPUTriCoreState *env, int n)
  39{
  40    switch (n) {
  41    case LCX_REGNUM:
  42        return env->LCX;
  43    case FCX_REGNUM:
  44        return env->FCX;
  45    case PCXI_REGNUM:
  46        return env->PCXI;
  47    case TRICORE_PSW_REGNUM:
  48        return psw_read(env);
  49    case TRICORE_PC_REGNUM:
  50        return env->PC;
  51    case ICR_REGNUM:
  52        return env->ICR;
  53    case ISP_REGNUM:
  54        return env->ISP;
  55    case BTV_REGNUM:
  56        return env->BTV;
  57    case BIV_REGNUM:
  58        return env->BIV;
  59    case SYSCON_REGNUM:
  60        return env->SYSCON;
  61    case PMUCON0_REGNUM:
  62        return 0; /* PMUCON0 */
  63    case DMUCON_REGNUM:
  64        return 0; /* DMUCON0 */
  65    default:
  66        return 0;
  67    }
  68}
  69
  70static void tricore_cpu_gdb_write_csfr(CPUTriCoreState *env, int n,
  71                                       uint32_t val)
  72{
  73    switch (n) {
  74    case LCX_REGNUM:
  75        env->LCX = val;
  76        break;
  77    case FCX_REGNUM:
  78        env->FCX = val;
  79        break;
  80    case PCXI_REGNUM:
  81        env->PCXI = val;
  82        break;
  83    case TRICORE_PSW_REGNUM:
  84        psw_write(env, val);
  85        break;
  86    case TRICORE_PC_REGNUM:
  87        env->PC = val;
  88        break;
  89    case ICR_REGNUM:
  90        env->ICR = val;
  91        break;
  92    case ISP_REGNUM:
  93        env->ISP = val;
  94        break;
  95    case BTV_REGNUM:
  96        env->BTV = val;
  97        break;
  98    case BIV_REGNUM:
  99        env->BIV = val;
 100        break;
 101    case SYSCON_REGNUM:
 102        env->SYSCON = val;
 103        break;
 104    }
 105}
 106
 107
 108int tricore_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
 109{
 110    TriCoreCPU *cpu = TRICORE_CPU(cs);
 111    CPUTriCoreState *env = &cpu->env;
 112
 113    if (n < 16) { /* data registers */
 114        return gdb_get_reg32(mem_buf, env->gpr_d[n]);
 115    } else if (n < 32) { /* address registers */
 116        return gdb_get_reg32(mem_buf, env->gpr_a[n - 16]);
 117    } else { /* csfr */
 118        return gdb_get_reg32(mem_buf, tricore_cpu_gdb_read_csfr(env, n));
 119    }
 120    return 0;
 121}
 122
 123int tricore_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
 124{
 125    TriCoreCPU *cpu = TRICORE_CPU(cs);
 126    CPUTriCoreState *env = &cpu->env;
 127    uint32_t tmp;
 128
 129    tmp = ldl_p(mem_buf);
 130
 131    if (n < 16) { /* data registers */
 132        env->gpr_d[n] = tmp;
 133    } else if (n < 32) { /* address registers */
 134        env->gpr_d[n - 16] = tmp;
 135    } else {
 136        tricore_cpu_gdb_write_csfr(env, n, tmp);
 137    }
 138    return 4;
 139}
 140