Merge tag 'seabios-20211203-pull-request' of git://git.kraxel.org/qemu into staging
[qemu.git] / linux-user / sh4 / cpu_loop.c
1 /*
2 * qemu user cpu loop
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program 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
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
22 #include "qemu.h"
23 #include "cpu_loop-common.h"
24
25 void cpu_loop(CPUSH4State *env)
26 {
27 CPUState *cs = env_cpu(env);
28 int trapnr, ret;
29 target_siginfo_t info;
30
31 while (1) {
32 bool arch_interrupt = true;
33
34 cpu_exec_start(cs);
35 trapnr = cpu_exec(cs);
36 cpu_exec_end(cs);
37 process_queued_cpu_work(cs);
38
39 switch (trapnr) {
40 case 0x160:
41 env->pc += 2;
42 ret = do_syscall(env,
43 env->gregs[3],
44 env->gregs[4],
45 env->gregs[5],
46 env->gregs[6],
47 env->gregs[7],
48 env->gregs[0],
49 env->gregs[1],
50 0, 0);
51 if (ret == -TARGET_ERESTARTSYS) {
52 env->pc -= 2;
53 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
54 env->gregs[0] = ret;
55 }
56 break;
57 case EXCP_INTERRUPT:
58 /* just indicate that signals should be handled asap */
59 break;
60 case EXCP_DEBUG:
61 info.si_signo = TARGET_SIGTRAP;
62 info.si_errno = 0;
63 info.si_code = TARGET_TRAP_BRKPT;
64 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
65 break;
66 case 0xa0:
67 case 0xc0:
68 info.si_signo = TARGET_SIGSEGV;
69 info.si_errno = 0;
70 info.si_code = TARGET_SEGV_MAPERR;
71 info._sifields._sigfault._addr = env->tea;
72 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
73 break;
74 case EXCP_ATOMIC:
75 cpu_exec_step_atomic(cs);
76 arch_interrupt = false;
77 break;
78 default:
79 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
80 cpu_dump_state(cs, stderr, 0);
81 exit(EXIT_FAILURE);
82 }
83 process_pending_signals (env);
84
85 /* Most of the traps imply an exception or interrupt, which
86 implies an REI instruction has been executed. Which means
87 that LDST (aka LOK_ADDR) should be cleared. But there are
88 a few exceptions for traps internal to QEMU. */
89 if (arch_interrupt) {
90 env->lock_addr = -1;
91 }
92 }
93 }
94
95 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
96 {
97 int i;
98
99 for(i = 0; i < 16; i++) {
100 env->gregs[i] = regs->regs[i];
101 }
102 env->pc = regs->pc;
103 }