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 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/helper-proto.h" 23#include "sysemu/sysemu.h" 24#include "qemu/timer.h" 25 26 27uint64_t helper_load_pcc(CPUAlphaState *env) 28{ 29#ifndef CONFIG_USER_ONLY 30 /* In system mode we have access to a decent high-resolution clock. 31 In order to make OS-level time accounting work with the RPCC, 32 present it with a well-timed clock fixed at 250MHz. */ 33 return (((uint64_t)env->pcc_ofs << 32) 34 | (uint32_t)(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2)); 35#else 36 /* In user-mode, QEMU_CLOCK_VIRTUAL doesn't exist. Just pass through the host cpu 37 clock ticks. Also, don't bother taking PCC_OFS into account. */ 38 return (uint32_t)cpu_get_host_ticks(); 39#endif 40} 41 42/* PALcode support special instructions */ 43#ifndef CONFIG_USER_ONLY 44void helper_tbia(CPUAlphaState *env) 45{ 46 tlb_flush(CPU(alpha_env_get_cpu(env)), 1); 47} 48 49void helper_tbis(CPUAlphaState *env, uint64_t p) 50{ 51 tlb_flush_page(CPU(alpha_env_get_cpu(env)), p); 52} 53 54void helper_tb_flush(CPUAlphaState *env) 55{ 56 tb_flush(CPU(alpha_env_get_cpu(env))); 57} 58 59void helper_halt(uint64_t restart) 60{ 61 if (restart) { 62 qemu_system_reset_request(); 63 } else { 64 qemu_system_shutdown_request(); 65 } 66} 67 68uint64_t helper_get_vmtime(void) 69{ 70 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 71} 72 73uint64_t helper_get_walltime(void) 74{ 75 return qemu_clock_get_ns(rtc_clock); 76} 77 78void helper_set_alarm(CPUAlphaState *env, uint64_t expire) 79{ 80 AlphaCPU *cpu = alpha_env_get_cpu(env); 81 82 if (expire) { 83 env->alarm_expire = expire; 84 timer_mod(cpu->alarm_timer, expire); 85 } else { 86 timer_del(cpu->alarm_timer); 87 } 88} 89 90#endif /* CONFIG_USER_ONLY */ 91