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/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "user-internals.h"
#include "cpu_loop-common.h"
#include "signal-common.h"
#include "internal.h"
void cpu_loop(CPUHexagonState *env)
{
CPUState *cs = env_cpu(env);
int trapnr;
target_ulong syscallnum;
target_ulong ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case HEX_EXCP_TRAP0:
syscallnum = env->gpr[6];
env->gpr[HEX_REG_PC] += 4;
ret = do_syscall(env,
syscallnum,
env->gpr[0],
env->gpr[1],
env->gpr[2],
env->gpr[3],
env->gpr[4],
env->gpr[5],
0, 0);
if (ret == -QEMU_ERESTARTSYS) {
env->gpr[HEX_REG_PC] -= 4;
} else if (ret != -QEMU_ESIGRETURN) {
env->gpr[0] = ret;
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
exit(EXIT_FAILURE);
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
env->gpr[HEX_REG_PC] = regs->sepc;
env->gpr[HEX_REG_SP] = regs->sp;
env->gpr[HEX_REG_USR] = 0x56000;
}
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