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-rw-r--r--qemu/target-alpha/sys_helper.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/qemu/target-alpha/sys_helper.c b/qemu/target-alpha/sys_helper.c
new file mode 100644
index 000000000..1c59e108b
--- /dev/null
+++ b/qemu/target-alpha/sys_helper.c
@@ -0,0 +1,111 @@
+/*
+ * 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 "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_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_call_pal(CPUAlphaState *env, uint64_t pc, uint64_t entry_ofs)
+{
+ int pal_mode = env->pal_mode;
+ env->exc_addr = pc | pal_mode;
+ env->pc = env->palbr + entry_ofs;
+ if (!pal_mode) {
+ env->pal_mode = 1;
+ swap_shadow_regs(env);
+ }
+}
+
+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 */