/* * 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.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 */