1d2a56bd2STaylor Simpson /* 2d2a56bd2STaylor Simpson * qemu user cpu loop 3d2a56bd2STaylor Simpson * 4d2a56bd2STaylor Simpson * Copyright (c) 2003-2008 Fabrice Bellard 5d2a56bd2STaylor Simpson * Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved. 6d2a56bd2STaylor Simpson * 7d2a56bd2STaylor Simpson * This program is free software; you can redistribute it and/or modify 8d2a56bd2STaylor Simpson * it under the terms of the GNU General Public License as published by 9d2a56bd2STaylor Simpson * the Free Software Foundation; either version 2 of the License, or 10d2a56bd2STaylor Simpson * (at your option) any later version. 11d2a56bd2STaylor Simpson * 12d2a56bd2STaylor Simpson * This program is distributed in the hope that it will be useful, 13d2a56bd2STaylor Simpson * but WITHOUT ANY WARRANTY; without even the implied warranty of 14d2a56bd2STaylor Simpson * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15d2a56bd2STaylor Simpson * GNU General Public License for more details. 16d2a56bd2STaylor Simpson * 17d2a56bd2STaylor Simpson * You should have received a copy of the GNU General Public License 18d2a56bd2STaylor Simpson * along with this program; if not, see <http://www.gnu.org/licenses/>. 19d2a56bd2STaylor Simpson */ 20d2a56bd2STaylor Simpson 21d2a56bd2STaylor Simpson #include "qemu/osdep.h" 22d2a56bd2STaylor Simpson #include "qemu.h" 23d2a56bd2STaylor Simpson #include "cpu_loop-common.h" 24d2a56bd2STaylor Simpson #include "internal.h" 25d2a56bd2STaylor Simpson 26d2a56bd2STaylor Simpson void cpu_loop(CPUHexagonState *env) 27d2a56bd2STaylor Simpson { 28*7d9ab202STaylor Simpson CPUState *cs = env_cpu(env); 29d2a56bd2STaylor Simpson int trapnr, signum, sigcode; 30d2a56bd2STaylor Simpson target_ulong sigaddr; 31d2a56bd2STaylor Simpson target_ulong syscallnum; 32d2a56bd2STaylor Simpson target_ulong ret; 33d2a56bd2STaylor Simpson 34d2a56bd2STaylor Simpson for (;;) { 35d2a56bd2STaylor Simpson cpu_exec_start(cs); 36d2a56bd2STaylor Simpson trapnr = cpu_exec(cs); 37d2a56bd2STaylor Simpson cpu_exec_end(cs); 38d2a56bd2STaylor Simpson process_queued_cpu_work(cs); 39d2a56bd2STaylor Simpson 40d2a56bd2STaylor Simpson signum = 0; 41d2a56bd2STaylor Simpson sigcode = 0; 42d2a56bd2STaylor Simpson sigaddr = 0; 43d2a56bd2STaylor Simpson 44d2a56bd2STaylor Simpson switch (trapnr) { 45d2a56bd2STaylor Simpson case EXCP_INTERRUPT: 46d2a56bd2STaylor Simpson /* just indicate that signals should be handled asap */ 47d2a56bd2STaylor Simpson break; 48d2a56bd2STaylor Simpson case HEX_EXCP_TRAP0: 49d2a56bd2STaylor Simpson syscallnum = env->gpr[6]; 50d2a56bd2STaylor Simpson env->gpr[HEX_REG_PC] += 4; 51d2a56bd2STaylor Simpson ret = do_syscall(env, 52d2a56bd2STaylor Simpson syscallnum, 53d2a56bd2STaylor Simpson env->gpr[0], 54d2a56bd2STaylor Simpson env->gpr[1], 55d2a56bd2STaylor Simpson env->gpr[2], 56d2a56bd2STaylor Simpson env->gpr[3], 57d2a56bd2STaylor Simpson env->gpr[4], 58d2a56bd2STaylor Simpson env->gpr[5], 59d2a56bd2STaylor Simpson 0, 0); 60d2a56bd2STaylor Simpson if (ret == -TARGET_ERESTARTSYS) { 61d2a56bd2STaylor Simpson env->gpr[HEX_REG_PC] -= 4; 62d2a56bd2STaylor Simpson } else if (ret != -TARGET_QEMU_ESIGRETURN) { 63d2a56bd2STaylor Simpson env->gpr[0] = ret; 64d2a56bd2STaylor Simpson } 65d2a56bd2STaylor Simpson break; 66d2a56bd2STaylor Simpson case HEX_EXCP_FETCH_NO_UPAGE: 67d2a56bd2STaylor Simpson case HEX_EXCP_PRIV_NO_UREAD: 68d2a56bd2STaylor Simpson case HEX_EXCP_PRIV_NO_UWRITE: 69d2a56bd2STaylor Simpson signum = TARGET_SIGSEGV; 70d2a56bd2STaylor Simpson sigcode = TARGET_SEGV_MAPERR; 71d2a56bd2STaylor Simpson break; 72d2a56bd2STaylor Simpson case EXCP_ATOMIC: 73d2a56bd2STaylor Simpson cpu_exec_step_atomic(cs); 74d2a56bd2STaylor Simpson break; 75d2a56bd2STaylor Simpson default: 76d2a56bd2STaylor Simpson EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n", 77d2a56bd2STaylor Simpson trapnr); 78d2a56bd2STaylor Simpson exit(EXIT_FAILURE); 79d2a56bd2STaylor Simpson } 80d2a56bd2STaylor Simpson 81d2a56bd2STaylor Simpson if (signum) { 82d2a56bd2STaylor Simpson target_siginfo_t info = { 83d2a56bd2STaylor Simpson .si_signo = signum, 84d2a56bd2STaylor Simpson .si_errno = 0, 85d2a56bd2STaylor Simpson .si_code = sigcode, 86d2a56bd2STaylor Simpson ._sifields._sigfault._addr = sigaddr 87d2a56bd2STaylor Simpson }; 88d2a56bd2STaylor Simpson queue_signal(env, info.si_signo, QEMU_SI_KILL, &info); 89d2a56bd2STaylor Simpson } 90d2a56bd2STaylor Simpson 91d2a56bd2STaylor Simpson process_pending_signals(env); 92d2a56bd2STaylor Simpson } 93d2a56bd2STaylor Simpson } 94d2a56bd2STaylor Simpson 95d2a56bd2STaylor Simpson void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 96d2a56bd2STaylor Simpson { 97d2a56bd2STaylor Simpson env->gpr[HEX_REG_PC] = regs->sepc; 98d2a56bd2STaylor Simpson env->gpr[HEX_REG_SP] = regs->sp; 99d2a56bd2STaylor Simpson env->gpr[HEX_REG_USR] = 0x56000; 100d2a56bd2STaylor Simpson } 101