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-rw-r--r--target/alpha/sys_helper.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/target/alpha/sys_helper.c b/target/alpha/sys_helper.c
new file mode 100644
index 0000000000..bec1e178be
--- /dev/null
+++ b/target/alpha/sys_helper.c
@@ -0,0 +1,91 @@
+/*
+ * 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 "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/exec-all.h"
+#include "exec/helper-proto.h"
+#include "sysemu/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_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2));
+#else
+ /* In user-mode, QEMU_CLOCK_VIRTUAL 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_host_ticks();
+#endif
+}
+
+/* PALcode support special instructions */
+#ifndef CONFIG_USER_ONLY
+void helper_tbia(CPUAlphaState *env)
+{
+ tlb_flush(CPU(alpha_env_get_cpu(env)), 1);
+}
+
+void helper_tbis(CPUAlphaState *env, uint64_t p)
+{
+ tlb_flush_page(CPU(alpha_env_get_cpu(env)), p);
+}
+
+void helper_tb_flush(CPUAlphaState *env)
+{
+ tb_flush(CPU(alpha_env_get_cpu(env)));
+}
+
+void helper_halt(uint64_t restart)
+{
+ if (restart) {
+ qemu_system_reset_request();
+ } else {
+ qemu_system_shutdown_request();
+ }
+}
+
+uint64_t helper_get_vmtime(void)
+{
+ return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+}
+
+uint64_t helper_get_walltime(void)
+{
+ return qemu_clock_get_ns(rtc_clock);
+}
+
+void helper_set_alarm(CPUAlphaState *env, uint64_t expire)
+{
+ AlphaCPU *cpu = alpha_env_get_cpu(env);
+
+ if (expire) {
+ env->alarm_expire = expire;
+ timer_mod(cpu->alarm_timer, expire);
+ } else {
+ timer_del(cpu->alarm_timer);
+ }
+}
+
+#endif /* CONFIG_USER_ONLY */