1 /* 2 * OpenRISC interrupt helper routines 3 * 4 * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> 5 * Feng Gao <gf91597@gmail.com> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "cpu.h" 23 #include "exec/exec-all.h" 24 #include "exec/helper-proto.h" 25 26 void HELPER(rfe)(CPUOpenRISCState *env) 27 { 28 OpenRISCCPU *cpu = openrisc_env_get_cpu(env); 29 CPUState *cs = CPU(cpu); 30 #ifndef CONFIG_USER_ONLY 31 int need_flush_tlb = (cpu->env.sr & (SR_SM | SR_IME | SR_DME)) ^ 32 (cpu->env.esr & (SR_SM | SR_IME | SR_DME)); 33 #endif 34 cpu->env.pc = cpu->env.epcr; 35 cpu->env.npc = cpu->env.epcr; 36 cpu->env.sr = cpu->env.esr; 37 38 #ifndef CONFIG_USER_ONLY 39 if (cpu->env.sr & SR_DME) { 40 cpu->env.tlb->cpu_openrisc_map_address_data = 41 &cpu_openrisc_get_phys_data; 42 } else { 43 cpu->env.tlb->cpu_openrisc_map_address_data = 44 &cpu_openrisc_get_phys_nommu; 45 } 46 47 if (cpu->env.sr & SR_IME) { 48 cpu->env.tlb->cpu_openrisc_map_address_code = 49 &cpu_openrisc_get_phys_code; 50 } else { 51 cpu->env.tlb->cpu_openrisc_map_address_code = 52 &cpu_openrisc_get_phys_nommu; 53 } 54 55 if (need_flush_tlb) { 56 tlb_flush(cs, 1); 57 } 58 #endif 59 cs->interrupt_request |= CPU_INTERRUPT_EXITTB; 60 } 61