From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/target-openrisc/interrupt.c | 85 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 qemu/target-openrisc/interrupt.c (limited to 'qemu/target-openrisc/interrupt.c') diff --git a/qemu/target-openrisc/interrupt.c b/qemu/target-openrisc/interrupt.c new file mode 100644 index 000000000..e480cfd1b --- /dev/null +++ b/qemu/target-openrisc/interrupt.c @@ -0,0 +1,85 @@ +/* + * OpenRISC interrupt. + * + * Copyright (c) 2011-2012 Jia Liu + * + * 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 . + */ + +#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) +{ +#ifndef CONFIG_USER_ONLY + OpenRISCCPU *cpu = OPENRISC_CPU(cs); + CPUOpenRISCState *env = &cpu->env; + + env->epcr = env->pc; + if (env->flags & D_FLAG) { + env->flags &= ~D_FLAG; + env->sr |= SR_DSX; + env->epcr -= 4; + } + if (cs->exception_index == EXCP_SYSCALL) { + env->epcr += 4; + } + + /* For machine-state changed between user-mode and supervisor mode, + we need flush TLB when we enter&exit EXCP. */ + tlb_flush(cs, 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 (cs->exception_index > 0 && cs->exception_index < EXCP_NR) { + env->pc = (cs->exception_index << 8); + } else { + cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index); + } +#endif + + cs->exception_index = -1; +} + +bool openrisc_cpu_exec_interrupt(CPUState *cs, int interrupt_request) +{ + OpenRISCCPU *cpu = OPENRISC_CPU(cs); + CPUOpenRISCState *env = &cpu->env; + int idx = -1; + + if ((interrupt_request & CPU_INTERRUPT_HARD) && (env->sr & SR_IEE)) { + idx = EXCP_INT; + } + if ((interrupt_request & CPU_INTERRUPT_TIMER) && (env->sr & SR_TEE)) { + idx = EXCP_TICK; + } + if (idx >= 0) { + cs->exception_index = idx; + openrisc_cpu_do_interrupt(cs); + return true; + } + return false; +} -- cgit 1.2.3-korg