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/*
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 * Xtensa gdb server stub
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 *
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 * Copyright (c) 2003-2005 Fabrice Bellard
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 * Copyright (c) 2013 SUSE LINUX Products GmbH
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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 */
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#include "config.h"
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#include "qemu-common.h"
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#include "exec/gdbstub.h"
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int xtensa_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
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{
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    XtensaCPU *cpu = XTENSA_CPU(cs);
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    CPUXtensaState *env = &cpu->env;
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    const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
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    if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
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        return 0;
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    }
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    switch (reg->type) {
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    case 9: /*pc*/
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        return gdb_get_reg32(mem_buf, env->pc);
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    case 1: /*ar*/
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        xtensa_sync_phys_from_window(env);
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        return gdb_get_reg32(mem_buf, env->phys_regs[(reg->targno & 0xff)
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                                                     % env->config->nareg]);
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    case 2: /*SR*/
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        return gdb_get_reg32(mem_buf, env->sregs[reg->targno & 0xff]);
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    case 3: /*UR*/
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        return gdb_get_reg32(mem_buf, env->uregs[reg->targno & 0xff]);
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    case 4: /*f*/
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        return gdb_get_reg32(mem_buf, float32_val(env->fregs[reg->targno
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                                                             & 0x0f]));
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    case 8: /*a*/
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        return gdb_get_reg32(mem_buf, env->regs[reg->targno & 0x0f]);
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    default:
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        qemu_log("%s from reg %d of unsupported type %d\n",
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                 __func__, n, reg->type);
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        return 0;
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    }
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}
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int xtensa_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
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{
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    XtensaCPU *cpu = XTENSA_CPU(cs);
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    CPUXtensaState *env = &cpu->env;
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    uint32_t tmp;
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    const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
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    if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
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        return 0;
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    }
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    tmp = ldl_p(mem_buf);
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    switch (reg->type) {
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    case 9: /*pc*/
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        env->pc = tmp;
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        break;
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    case 1: /*ar*/
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        env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp;
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        xtensa_sync_window_from_phys(env);
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        break;
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    case 2: /*SR*/
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        env->sregs[reg->targno & 0xff] = tmp;
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        break;
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    case 3: /*UR*/
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        env->uregs[reg->targno & 0xff] = tmp;
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        break;
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    case 4: /*f*/
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        env->fregs[reg->targno & 0x0f] = make_float32(tmp);
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        break;
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    case 8: /*a*/
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        env->regs[reg->targno & 0x0f] = tmp;
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        break;
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    default:
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        qemu_log("%s to reg %d of unsupported type %d\n",
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                 __func__, n, reg->type);
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        return 0;
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    }
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    return 4;
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}