/* * OpenRISC interrupt helper routines * * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> * Feng Gao <gf91597@gmail.com> * * 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 "qemu/osdep.h" #include "cpu.h" #include "exec/exec-all.h" #include "exec/helper-proto.h" void HELPER(rfe)(CPUOpenRISCState *env) { OpenRISCCPU *cpu = openrisc_env_get_cpu(env); CPUState *cs = CPU(cpu); #ifndef CONFIG_USER_ONLY int need_flush_tlb = (cpu->env.sr & (SR_SM | SR_IME | SR_DME)) ^ (cpu->env.esr & (SR_SM | SR_IME | SR_DME)); #endif cpu->env.pc = cpu->env.epcr; cpu->env.npc = cpu->env.epcr; cpu->env.sr = cpu->env.esr; #ifndef CONFIG_USER_ONLY if (cpu->env.sr & SR_DME) { cpu->env.tlb->cpu_openrisc_map_address_data = &cpu_openrisc_get_phys_data; } else { cpu->env.tlb->cpu_openrisc_map_address_data = &cpu_openrisc_get_phys_nommu; } if (cpu->env.sr & SR_IME) { cpu->env.tlb->cpu_openrisc_map_address_code = &cpu_openrisc_get_phys_code; } else { cpu->env.tlb->cpu_openrisc_map_address_code = &cpu_openrisc_get_phys_nommu; } if (need_flush_tlb) { tlb_flush(cs, 1); } #endif cs->interrupt_request |= CPU_INTERRUPT_EXITTB; }