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/*
* 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 "cpu.h"
#include "helper.h"
void HELPER(rfe)(CPUOpenRISCState *env)
{
OpenRISCCPU *cpu = OPENRISC_CPU(ENV_GET_CPU(env));
#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(&cpu->env, 1);
}
#endif
cpu->env.interrupt_request |= CPU_INTERRUPT_EXITTB;
}
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