77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
|
|
* OpenRISC interrupt.
|
|
*
|
|
* Copyright (c) 2011-2012 Jia Liu <proljc@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 "qemu-common.h"
|
|
#include "exec/gdbstub.h"
|
|
#include "qemu/host-utils.h"
|
|
#ifndef CONFIG_USER_ONLY
|
|
#include "hw/loader.h"
|
|
#endif
|
|
|
|
void openrisc_cpu_do_interrupt(CPUState *cs)
|
|
{
|
|
OpenRISCCPU *cpu = OPENRISC_CPU(cs);
|
|
CPUOpenRISCState *env = &cpu->env;
|
|
#ifndef CONFIG_USER_ONLY
|
|
if (env->flags & D_FLAG) { /* Delay Slot insn */
|
|
env->flags &= ~D_FLAG;
|
|
env->sr |= SR_DSX;
|
|
if (env->exception_index == EXCP_TICK ||
|
|
env->exception_index == EXCP_INT ||
|
|
env->exception_index == EXCP_SYSCALL ||
|
|
env->exception_index == EXCP_FPE) {
|
|
env->epcr = env->jmp_pc;
|
|
} else {
|
|
env->epcr = env->pc - 4;
|
|
}
|
|
} else {
|
|
if (env->exception_index == EXCP_TICK ||
|
|
env->exception_index == EXCP_INT ||
|
|
env->exception_index == EXCP_SYSCALL ||
|
|
env->exception_index == EXCP_FPE) {
|
|
env->epcr = env->npc;
|
|
} else {
|
|
env->epcr = env->pc;
|
|
}
|
|
}
|
|
|
|
/* For machine-state changed between user-mode and supervisor mode,
|
|
we need flush TLB when we enter&exit EXCP. */
|
|
tlb_flush(env, 1);
|
|
|
|
env->esr = env->sr;
|
|
env->sr &= ~SR_DME;
|
|
env->sr &= ~SR_IME;
|
|
env->sr |= SR_SM;
|
|
env->sr &= ~SR_IEE;
|
|
env->sr &= ~SR_TEE;
|
|
env->tlb->cpu_openrisc_map_address_data = &cpu_openrisc_get_phys_nommu;
|
|
env->tlb->cpu_openrisc_map_address_code = &cpu_openrisc_get_phys_nommu;
|
|
|
|
if (env->exception_index > 0 && env->exception_index < EXCP_NR) {
|
|
env->pc = (env->exception_index << 8);
|
|
} else {
|
|
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
|
}
|
|
#endif
|
|
|
|
env->exception_index = -1;
|
|
}
|