mirror of https://gitee.com/openkylin/qemu.git
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
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/*
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* OpenRISC interrupt helper routines
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*
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* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
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* Feng Gao <gf91597@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h"
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#include "helper.h"
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void HELPER(rfe)(CPUOpenRISCState *env)
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{
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OpenRISCCPU *cpu = OPENRISC_CPU(ENV_GET_CPU(env));
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#ifndef CONFIG_USER_ONLY
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int need_flush_tlb = (cpu->env.sr & (SR_SM | SR_IME | SR_DME)) ^
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(cpu->env.esr & (SR_SM | SR_IME | SR_DME));
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#endif
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cpu->env.pc = cpu->env.epcr;
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cpu->env.npc = cpu->env.epcr;
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cpu->env.sr = cpu->env.esr;
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#ifndef CONFIG_USER_ONLY
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if (cpu->env.sr & SR_DME) {
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cpu->env.tlb->cpu_openrisc_map_address_data =
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&cpu_openrisc_get_phys_data;
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} else {
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cpu->env.tlb->cpu_openrisc_map_address_data =
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&cpu_openrisc_get_phys_nommu;
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}
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if (cpu->env.sr & SR_IME) {
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cpu->env.tlb->cpu_openrisc_map_address_code =
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&cpu_openrisc_get_phys_code;
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} else {
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cpu->env.tlb->cpu_openrisc_map_address_code =
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&cpu_openrisc_get_phys_nommu;
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}
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if (need_flush_tlb) {
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tlb_flush(&cpu->env, 1);
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}
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#endif
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cpu->env.interrupt_request |= CPU_INTERRUPT_EXITTB;
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}
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