1 files changed, 87 insertions, 0 deletions
diff --git a/target-alpha/sys_helper.c b/target-alpha/sys_helper.c
new file mode 100644
index 0000000000..40ca49c883
--- /dev/null
+++ b/target-alpha/sys_helper.c
@@ -0,0 +1,87 @@
+/*
+ *  Helpers for system instructions.
+ *
+ *  Copyright (c) 2007 Jocelyn Mayer
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "helper.h"
+#include "sysemu.h"
+#include "qemu-timer.h"
+
+
+uint64_t helper_load_pcc(CPUAlphaState *env)
+{
+#ifndef CONFIG_USER_ONLY
+    /* In system mode we have access to a decent high-resolution clock.
+       In order to make OS-level time accounting work with the RPCC,
+       present it with a well-timed clock fixed at 250MHz.  */
+    return (((uint64_t)env->pcc_ofs << 32)
+            | (uint32_t)(qemu_get_clock_ns(vm_clock) >> 2));
+#else
+    /* In user-mode, vm_clock doesn't exist.  Just pass through the host cpu
+       clock ticks.  Also, don't bother taking PCC_OFS into account.  */
+    return (uint32_t)cpu_get_real_ticks();
+#endif
+}
+
+/* PALcode support special instructions */
+#ifndef CONFIG_USER_ONLY
+void helper_hw_ret(CPUAlphaState *env, uint64_t a)
+{
+    env->pc = a & ~3;
+    env->intr_flag = 0;
+    env->lock_addr = -1;
+    if ((a & 1) == 0) {
+        env->pal_mode = 0;
+        swap_shadow_regs(env);
+    }
+}
+
+void helper_tbia(CPUAlphaState *env)
+{
+    tlb_flush(env, 1);
+}
+
+void helper_tbis(CPUAlphaState *env, uint64_t p)
+{
+    tlb_flush_page(env, p);
+}
+
+void helper_halt(uint64_t restart)
+{
+    if (restart) {
+        qemu_system_reset_request();
+    } else {
+        qemu_system_shutdown_request();
+    }
+}
+
+uint64_t helper_get_time(void)
+{
+    return qemu_get_clock_ns(rtc_clock);
+}
+
+void helper_set_alarm(CPUAlphaState *env, uint64_t expire)
+{
+    if (expire) {
+        env->alarm_expire = expire;
+        qemu_mod_timer(env->alarm_timer, expire);
+    } else {
+        qemu_del_timer(env->alarm_timer);
+    }
+}
+#endif /* CONFIG_USER_ONLY */