1 files changed, 97 insertions, 0 deletions
diff --git a/linux-user/sh4/cpu_loop.c b/linux-user/sh4/cpu_loop.c
new file mode 100644
index 000000000..ac9b01840
--- /dev/null
+++ b/linux-user/sh4/cpu_loop.c
@@ -0,0 +1,97 @@
+/*
+ *  qemu user cpu loop
+ *
+ *  Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ *  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-common.h"
+#include "qemu.h"
+#include "user-internals.h"
+#include "cpu_loop-common.h"
+#include "signal-common.h"
+
+void cpu_loop(CPUSH4State *env)
+{
+    CPUState *cs = env_cpu(env);
+    int trapnr, ret;
+    target_siginfo_t info;
+
+    while (1) {
+        bool arch_interrupt = true;
+
+        cpu_exec_start(cs);
+        trapnr = cpu_exec(cs);
+        cpu_exec_end(cs);
+        process_queued_cpu_work(cs);
+
+        switch (trapnr) {
+        case 0x160:
+            env->pc += 2;
+            ret = do_syscall(env,
+                             env->gregs[3],
+                             env->gregs[4],
+                             env->gregs[5],
+                             env->gregs[6],
+                             env->gregs[7],
+                             env->gregs[0],
+                             env->gregs[1],
+                             0, 0);
+            if (ret == -TARGET_ERESTARTSYS) {
+                env->pc -= 2;
+            } else if (ret != -TARGET_QEMU_ESIGRETURN) {
+                env->gregs[0] = ret;
+            }
+            break;
+        case EXCP_INTERRUPT:
+            /* just indicate that signals should be handled asap */
+            break;
+        case EXCP_DEBUG:
+            info.si_signo = TARGET_SIGTRAP;
+            info.si_errno = 0;
+            info.si_code = TARGET_TRAP_BRKPT;
+            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            break;
+        case EXCP_ATOMIC:
+            cpu_exec_step_atomic(cs);
+            arch_interrupt = false;
+            break;
+        default:
+            fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
+            cpu_dump_state(cs, stderr, 0);
+            exit(EXIT_FAILURE);
+        }
+        process_pending_signals (env);
+
+        /* Most of the traps imply an exception or interrupt, which
+           implies an REI instruction has been executed.  Which means
+           that LDST (aka LOK_ADDR) should be cleared.  But there are
+           a few exceptions for traps internal to QEMU.  */
+        if (arch_interrupt) {
+            env->lock_addr = -1;
+        }
+    }
+}
+
+void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
+{
+    int i;
+
+    for(i = 0; i < 16; i++) {
+        env->gregs[i] = regs->regs[i];
+    }
+    env->pc = regs->pc;
+}