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21#include "qemu/osdep.h"
22#include "qemu.h"
23#include "user-internals.h"
24#include "cpu_loop-common.h"
25#include "signal-common.h"
26#include "internal.h"
27
28void cpu_loop(CPUHexagonState *env)
29{
30 CPUState *cs = env_cpu(env);
31 int trapnr;
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
41 switch (trapnr) {
42 case EXCP_INTERRUPT:
43
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);
57 if (ret == -TARGET_ERESTARTSYS) {
58 env->gpr[HEX_REG_PC] -= 4;
59 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
60 env->gpr[0] = ret;
61 }
62 break;
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 }
71 process_pending_signals(env);
72 }
73}
74
75void 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}
81