target/alpha/sys_helper.c

   1 /*
   2  *  Helpers for system instructions.
   3  *
   4  *  Copyright (c) 2007 Jocelyn Mayer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "exec/exec-all.h"
  23 #include "exec/tb-flush.h"
  24 #include "exec/helper-proto.h"
  25 #include "sysemu/runstate.h"
  26 #include "sysemu/sysemu.h"
  27 #include "qemu/timer.h"
  28
  29
  30 /* PALcode support special instructions */
  31 void helper_tbia(CPUAlphaState *env)
  32 {
  33     tlb_flush(env_cpu(env));
  34 }
  35
  36 void helper_tbis(CPUAlphaState *env, uint64_t p)
  37 {
  38     tlb_flush_page(env_cpu(env), p);
  39 }
  40
  41 void helper_tb_flush(CPUAlphaState *env)
  42 {
  43     tb_flush(env_cpu(env));
  44 }
  45
  46 void helper_halt(uint64_t restart)
  47 {
  48     if (restart) {
  49         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
  50     } else {
  51         qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
  52     }
  53 }
  54
  55 uint64_t helper_get_vmtime(void)
  56 {
  57     return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  58 }
  59
  60 uint64_t helper_get_walltime(void)
  61 {
  62     return qemu_clock_get_ns(rtc_clock);
  63 }
  64
  65 void helper_set_alarm(CPUAlphaState *env, uint64_t expire)
  66 {
  67     AlphaCPU *cpu = env_archcpu(env);
  68
  69     if (expire) {
  70         env->alarm_expire = expire;
  71         timer_mod(cpu->alarm_timer, expire);
  72     } else {
  73         timer_del(cpu->alarm_timer);
  74     }
  75 }