/* * QEMU Motorola 68k CPU * * Copyright (c) 2012 SUSE LINUX Products GmbH * * 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 2.1 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 "qemu/osdep.h" #include "qapi/error.h" #include "hw/m68k/m68k.h" #include "cpu.h" #include "qemu-common.h" #include "exec/exec-all.h" static void m68k_cpu_set_pc(CPUState *cs, vaddr value) { M68kCPU *cpu = M68K_CPU(cs->uc, cs); cpu->env.pc = value; } static bool m68k_cpu_has_work(CPUState *cs) { return cs->interrupt_request & CPU_INTERRUPT_HARD; } static void m68k_set_feature(CPUM68KState *env, int feature) { env->features |= (1u << feature); } /* CPUClass::reset() */ static void m68k_cpu_reset(CPUState *s) { M68kCPU *cpu = M68K_CPU(s->uc, s); M68kCPUClass *mcc = M68K_CPU_GET_CLASS(s->uc, cpu); CPUM68KState *env = &cpu->env; mcc->parent_reset(s); memset(env, 0, offsetof(CPUM68KState, features)); #if !defined(CONFIG_USER_ONLY) env->sr = 0x2700; #endif m68k_switch_sp(env); /* ??? FP regs should be initialized to NaN. */ env->cc_op = CC_OP_FLAGS; /* TODO: We should set PC from the interrupt vector. */ env->pc = 0; tlb_flush(s, 1); } /* CPU models */ static ObjectClass *m68k_cpu_class_by_name(struct uc_struct *uc, const char *cpu_model) { ObjectClass *oc; char *typename; if (cpu_model == NULL) { return NULL; } typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model); oc = object_class_by_name(uc, typename); g_free(typename); if (oc != NULL && (object_class_dynamic_cast(uc, oc, TYPE_M68K_CPU) == NULL || object_class_is_abstract(oc))) { return NULL; } return oc; } static void m5206_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque) { M68kCPU *cpu = M68K_CPU(uc, obj); CPUM68KState *env = &cpu->env; m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); } static void m5208_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque) { M68kCPU *cpu = M68K_CPU(uc, obj); CPUM68KState *env = &cpu->env; m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); m68k_set_feature(env, M68K_FEATURE_BRAL); m68k_set_feature(env, M68K_FEATURE_CF_EMAC); m68k_set_feature(env, M68K_FEATURE_USP); } static void cfv4e_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque) { M68kCPU *cpu = M68K_CPU(uc, obj); CPUM68KState *env = &cpu->env; m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); m68k_set_feature(env, M68K_FEATURE_BRAL); m68k_set_feature(env, M68K_FEATURE_CF_FPU); m68k_set_feature(env, M68K_FEATURE_CF_EMAC); m68k_set_feature(env, M68K_FEATURE_USP); } static void any_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque) { M68kCPU *cpu = M68K_CPU(uc, obj); CPUM68KState *env = &cpu->env; m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); m68k_set_feature(env, M68K_FEATURE_BRAL); m68k_set_feature(env, M68K_FEATURE_CF_FPU); /* MAC and EMAC are mututally exclusive, so pick EMAC. It's mostly backwards compatible. */ m68k_set_feature(env, M68K_FEATURE_CF_EMAC); m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); m68k_set_feature(env, M68K_FEATURE_USP); m68k_set_feature(env, M68K_FEATURE_EXT_FULL); m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); } typedef struct M68kCPUInfo { const char *name; void (*instance_init)(struct uc_struct *uc, Object *obj, void *opaque); } M68kCPUInfo; static const M68kCPUInfo m68k_cpus[] = { { "m5206", m5206_cpu_initfn }, { "m5208", m5208_cpu_initfn }, { "cfv4e", cfv4e_cpu_initfn }, { "any", any_cpu_initfn }, }; static int m68k_cpu_realizefn(struct uc_struct *uc, DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); M68kCPUClass *mcc = M68K_CPU_GET_CLASS(uc, dev); cpu_reset(cs); qemu_init_vcpu(cs); mcc->parent_realize(cs->uc, dev, errp); return 0; } static void m68k_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque) { CPUState *cs = CPU(obj); M68kCPU *cpu = M68K_CPU(uc, obj); CPUM68KState *env = &cpu->env; cs->env_ptr = env; cpu_exec_init(cs, opaque); if (tcg_enabled(uc)) { m68k_tcg_init(uc); } } static void m68k_cpu_class_init(struct uc_struct *uc, ObjectClass *c, void *data) { M68kCPUClass *mcc = M68K_CPU_CLASS(uc, c); CPUClass *cc = CPU_CLASS(uc, c); DeviceClass *dc = DEVICE_CLASS(uc, c); mcc->parent_realize = dc->realize; dc->realize = m68k_cpu_realizefn; mcc->parent_reset = cc->reset; cc->reset = m68k_cpu_reset; cc->class_by_name = m68k_cpu_class_by_name; cc->has_work = m68k_cpu_has_work; cc->do_interrupt = m68k_cpu_do_interrupt; cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt; cc->set_pc = m68k_cpu_set_pc; #ifdef CONFIG_USER_ONLY cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault; #else cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug; #endif cc->cpu_exec_enter = m68k_cpu_exec_enter; cc->cpu_exec_exit = m68k_cpu_exec_exit; } static void register_cpu_type(void *opaque, const M68kCPUInfo *info) { TypeInfo type_info = {0}; type_info.parent = TYPE_M68K_CPU, type_info.instance_init = info->instance_init, type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name); type_register(opaque, &type_info); g_free((void *)type_info.name); } void m68k_cpu_register_types(void *opaque) { const TypeInfo m68k_cpu_type_info = { TYPE_M68K_CPU, TYPE_CPU, sizeof(M68kCPUClass), sizeof(M68kCPU), opaque, m68k_cpu_initfn, NULL, NULL, NULL, m68k_cpu_class_init, NULL, NULL, true, }; int i; type_register_static(opaque, &m68k_cpu_type_info); for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) { register_cpu_type(opaque, &m68k_cpus[i]); } }