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/*
* 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/exec-all.h"
#include "exec/tb-flush.h"
#include "exec/helper-proto.h"
#include "sysemu/runstate.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(env_cpu(env));
}
void helper_tbis(CPUAlphaState *env, uint64_t p)
{
tlb_flush_page(env_cpu(env), p);
}
void helper_tb_flush(CPUAlphaState *env)
{
tb_flush(env_cpu(env));
}
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);
}
}
#endif /* CONFIG_USER_ONLY */
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