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d2a56bd2 TS |
1 | /* |
2 | * qemu user cpu loop | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include "qemu/osdep.h" | |
22 | #include "qemu.h" | |
3b249d26 | 23 | #include "user-internals.h" |
d2a56bd2 | 24 | #include "cpu_loop-common.h" |
2113aed6 | 25 | #include "signal-common.h" |
d2a56bd2 TS |
26 | #include "internal.h" |
27 | ||
28 | void cpu_loop(CPUHexagonState *env) | |
29 | { | |
7d9ab202 | 30 | CPUState *cs = env_cpu(env); |
70863887 | 31 | int trapnr; |
d2a56bd2 TS |
32 | target_ulong syscallnum; |
33 | target_ulong ret; | |
34 | ||
35 | for (;;) { | |
36 | cpu_exec_start(cs); | |
37 | trapnr = cpu_exec(cs); | |
38 | cpu_exec_end(cs); | |
39 | process_queued_cpu_work(cs); | |
40 | ||
d2a56bd2 TS |
41 | switch (trapnr) { |
42 | case EXCP_INTERRUPT: | |
43 | /* just indicate that signals should be handled asap */ | |
44 | break; | |
45 | case HEX_EXCP_TRAP0: | |
46 | syscallnum = env->gpr[6]; | |
47 | env->gpr[HEX_REG_PC] += 4; | |
48 | ret = do_syscall(env, | |
49 | syscallnum, | |
50 | env->gpr[0], | |
51 | env->gpr[1], | |
52 | env->gpr[2], | |
53 | env->gpr[3], | |
54 | env->gpr[4], | |
55 | env->gpr[5], | |
56 | 0, 0); | |
af254a27 | 57 | if (ret == -QEMU_ERESTARTSYS) { |
d2a56bd2 | 58 | env->gpr[HEX_REG_PC] -= 4; |
57a0c938 | 59 | } else if (ret != -QEMU_ESIGRETURN) { |
d2a56bd2 TS |
60 | env->gpr[0] = ret; |
61 | } | |
62 | break; | |
d2a56bd2 TS |
63 | case EXCP_ATOMIC: |
64 | cpu_exec_step_atomic(cs); | |
65 | break; | |
66 | default: | |
67 | EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n", | |
68 | trapnr); | |
69 | exit(EXIT_FAILURE); | |
70 | } | |
d2a56bd2 TS |
71 | process_pending_signals(env); |
72 | } | |
73 | } | |
74 | ||
75 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) | |
76 | { | |
77 | env->gpr[HEX_REG_PC] = regs->sepc; | |
78 | env->gpr[HEX_REG_SP] = regs->sp; | |
79 | env->gpr[HEX_REG_USR] = 0x56000; | |
80 | } |