projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| e67db06e JL |
1 | /* |
| 2 | * OpenRISC interrupt. | |
| 3 | * | |
| 4 | * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> | |
| 5 | * | |
| 6 | * This library is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
| 18 | */ | |
| 19 | ||
| 20 | #include "cpu.h" | |
| 21 | #include "qemu-common.h" | |
| 022c62cb | 22 | #include "exec/gdbstub.h" |
| 1de7afc9 | 23 | #include "qemu/host-utils.h" |
| e67db06e JL |
24 | #ifndef CONFIG_USER_ONLY |
| 25 | #include "hw/loader.h" | |
| 26 | #endif | |
| 27 | ||
| 28 | void do_interrupt(CPUOpenRISCState *env) | |
| 29 | { | |
| b6a71ef7 JL |
30 | #ifndef CONFIG_USER_ONLY |
| 31 | if (env->flags & D_FLAG) { /* Delay Slot insn */ | |
| 32 | env->flags &= ~D_FLAG; | |
| 33 | env->sr |= SR_DSX; | |
| 34 | if (env->exception_index == EXCP_TICK || | |
| 35 | env->exception_index == EXCP_INT || | |
| 36 | env->exception_index == EXCP_SYSCALL || | |
| 37 | env->exception_index == EXCP_FPE) { | |
| 38 | env->epcr = env->jmp_pc; | |
| 39 | } else { | |
| 40 | env->epcr = env->pc - 4; | |
| 41 | } | |
| 42 | } else { | |
| 43 | if (env->exception_index == EXCP_TICK || | |
| 44 | env->exception_index == EXCP_INT || | |
| 45 | env->exception_index == EXCP_SYSCALL || | |
| 46 | env->exception_index == EXCP_FPE) { | |
| 47 | env->epcr = env->npc; | |
| 48 | } else { | |
| 49 | env->epcr = env->pc; | |
| 50 | } | |
| 51 | } | |
| 52 | ||
| 53 | /* For machine-state changed between user-mode and supervisor mode, | |
| 54 | we need flush TLB when we enter&exit EXCP. */ | |
| 55 | tlb_flush(env, 1); | |
| 56 | ||
| 57 | env->esr = env->sr; | |
| 58 | env->sr &= ~SR_DME; | |
| 59 | env->sr &= ~SR_IME; | |
| 60 | env->sr |= SR_SM; | |
| 61 | env->sr &= ~SR_IEE; | |
| 62 | env->sr &= ~SR_TEE; | |
| 63 | env->tlb->cpu_openrisc_map_address_data = &cpu_openrisc_get_phys_nommu; | |
| 64 | env->tlb->cpu_openrisc_map_address_code = &cpu_openrisc_get_phys_nommu; | |
| 65 | ||
| 66 | if (env->exception_index > 0 && env->exception_index < EXCP_NR) { | |
| 67 | env->pc = (env->exception_index << 8); | |
| 68 | } else { | |
| 69 | cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index); | |
| 70 | } | |
| 71 | #endif | |
| 72 | ||
| 73 | env->exception_index = -1; | |
| e67db06e | 74 | } |