88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*
|
|
* 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/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 */
|