/*
 *  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 2.1 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/cputlb.h"
#include "exec/helper-proto.h"
#include "system/runstate.h"
#include "system/system.h"
#include "qemu/timer.h"


/* PALcode support special instructions */
void helper_tbia(CPUAlphaState *env)
{
    tlb_flush(env_cpu(env));
}

void helper_tbis(CPUAlphaState *env, uint64_t p)
{
    tlb_flush_page(env_cpu(env), p);
}

void helper_halt(uint64_t restart)
{
    if (restart) {
        qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
    } else {
        qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
    }
}

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 = env_archcpu(env);

    if (expire) {
        env->alarm_expire = expire;
        timer_mod(cpu->alarm_timer, expire);
    } else {
        timer_del(cpu->alarm_timer);
    }
}

uint64_t HELPER(whami)(CPUAlphaState *env)
{
    return env_cpu(env)->cpu_index;
}