155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
/*
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* QEMU CPU model
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*
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* Copyright (c) 2012-2014 SUSE LINUX Products GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*/
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#include "uc_priv.h"
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#include "qemu/osdep.h"
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#include "hw/core/cpu.h"
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#include "sysemu/tcg.h"
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bool cpu_paging_enabled(const CPUState *cpu)
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{
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CPUClass *cc = CPU_GET_CLASS(cpu);
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return cc->get_paging_enabled(cpu);
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}
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static bool cpu_common_get_paging_enabled(const CPUState *cpu)
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{
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return false;
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}
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void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list)
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{
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CPUClass *cc = CPU_GET_CLASS(cpu);
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cc->get_memory_mapping(cpu, list);
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}
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static void cpu_common_get_memory_mapping(CPUState *cpu,
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MemoryMappingList *list)
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{
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// error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
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}
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/* Resetting the IRQ comes from across the code base so we take the
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* BQL here if we need to. cpu_interrupt assumes it is held.*/
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void cpu_reset_interrupt(CPUState *cpu, int mask)
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{
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cpu->interrupt_request &= ~mask;
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}
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void cpu_exit(CPUState *cpu)
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{
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cpu->exit_request = 1;
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cpu->tcg_exit_req = 1;
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cpu->icount_decr_ptr->u16.high = -1;
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}
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static void cpu_common_noop(CPUState *cpu)
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{
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}
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static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
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{
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return false;
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}
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void cpu_reset(CPUState *cpu)
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{
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CPUClass *klass = CPU_GET_CLASS(cpu);
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if (klass->reset != NULL) {
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(*klass->reset)(cpu);
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}
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}
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static void cpu_common_reset(CPUState *dev)
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{
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CPUState *cpu = CPU(dev);
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cpu->interrupt_request = 0;
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cpu->halted = 0;
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cpu->mem_io_pc = 0;
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cpu->icount_extra = 0;
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cpu->can_do_io = 1;
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cpu->exception_index = -1;
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cpu->crash_occurred = false;
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cpu->cflags_next_tb = -1;
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cpu_tb_jmp_cache_clear(cpu);
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cpu->uc->tcg_flush_tlb(cpu->uc);
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}
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static bool cpu_common_has_work(CPUState *cs)
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{
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return false;
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}
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static int64_t cpu_common_get_arch_id(CPUState *cpu)
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{
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return cpu->cpu_index;
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}
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void cpu_class_init(struct uc_struct *uc, CPUClass *k)
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{
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k->get_arch_id = cpu_common_get_arch_id;
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k->has_work = cpu_common_has_work;
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k->get_paging_enabled = cpu_common_get_paging_enabled;
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k->get_memory_mapping = cpu_common_get_memory_mapping;
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k->debug_excp_handler = cpu_common_noop;
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k->cpu_exec_enter = cpu_common_noop;
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k->cpu_exec_exit = cpu_common_noop;
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k->cpu_exec_interrupt = cpu_common_exec_interrupt;
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/* instead of dc->reset. */
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k->reset = cpu_common_reset;
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return;
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}
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void cpu_common_initfn(struct uc_struct *uc, CPUState *cs)
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{
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CPUState *cpu = CPU(cs);
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cpu->cpu_index = UNASSIGNED_CPU_INDEX;
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cpu->cluster_index = UNASSIGNED_CLUSTER_INDEX;
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/* *-user doesn't have configurable SMP topology */
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/* the default value is changed by qemu_init_vcpu() for softmmu */
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cpu->nr_cores = 1;
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cpu->nr_threads = 1;
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QTAILQ_INIT(&cpu->breakpoints);
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QTAILQ_INIT(&cpu->watchpoints);
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/* cpu_exec_initfn(cpu); */
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cpu->num_ases = 1;
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cpu->as = &(cpu->uc->address_space_memory);
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cpu->memory = cpu->uc->system_memory;
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}
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void cpu_stop(struct uc_struct *uc)
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{
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if (uc->cpu) {
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uc->cpu->stop = false;
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uc->cpu->stopped = true;
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cpu_exit(uc->cpu);
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}
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}
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