/* * 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 "gdbstub.h" #include "host-utils.h" #ifndef CONFIG_USER_ONLY #include "hw/loader.h" #endif void do_interrupt(CPUOpenRISCState *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; }