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/exec-all.h" 23#include "exec/helper-proto.h" 24#include "sysemu/sysemu.h" 25#include "qemu/timer.h" 26 27 28uint64_t helper_load_pcc(CPUAlphaState *env) 29{ 30#ifndef CONFIG_USER_ONLY 31 /* In system mode we have access to a decent high-resolution clock. 32 In order to make OS-level time accounting work with the RPCC, 33 present it with a well-timed clock fixed at 250MHz. */ 34 return (((uint64_t)env->pcc_ofs << 32) 35 | (uint32_t)(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2)); 36#else 37 /* In user-mode, QEMU_CLOCK_VIRTUAL doesn't exist. Just pass through the host cpu 38 clock ticks. Also, don't bother taking PCC_OFS into account. */ 39 return (uint32_t)cpu_get_host_ticks(); 40#endif 41} 42 43/* PALcode support special instructions */ 44#ifndef CONFIG_USER_ONLY 45void helper_tbia(CPUAlphaState *env) 46{ 47 tlb_flush(CPU(alpha_env_get_cpu(env))); 48} 49 50void helper_tbis(CPUAlphaState *env, uint64_t p) 51{ 52 tlb_flush_page(CPU(alpha_env_get_cpu(env)), p); 53} 54 55void helper_tb_flush(CPUAlphaState *env) 56{ 57 tb_flush(CPU(alpha_env_get_cpu(env))); 58} 59 60void helper_halt(uint64_t restart) 61{ 62 if (restart) { 63 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 64 } else { 65 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 66 } 67} 68 69uint64_t helper_get_vmtime(void) 70{ 71 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 72} 73 74uint64_t helper_get_walltime(void) 75{ 76 return qemu_clock_get_ns(rtc_clock); 77} 78 79void helper_set_alarm(CPUAlphaState *env, uint64_t expire) 80{ 81 AlphaCPU *cpu = alpha_env_get_cpu(env); 82 83 if (expire) { 84 env->alarm_expire = expire; 85 timer_mod(cpu->alarm_timer, expire); 86 } else { 87 timer_del(cpu->alarm_timer); 88 } 89} 90 91#endif /* CONFIG_USER_ONLY */ 92