diff options
Diffstat (limited to 'target-m68k/cpu.c')
| -rw-r--r-- | target-m68k/cpu.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/target-m68k/cpu.c b/target-m68k/cpu.c new file mode 100644 index 0000000000..3e70bb0ead --- /dev/null +++ b/target-m68k/cpu.c @@ -0,0 +1,170 @@ +/* + * 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 + * <http://www.gnu.org/licenses/lgpl-2.1.html> + */ + +#include "cpu.h" +#include "qemu-common.h" + + +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); + M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu); + CPUM68KState *env = &cpu->env; + + if (qemu_loglevel_mask(CPU_LOG_RESET)) { + qemu_log("CPU Reset (CPU %d)\n", env->cpu_index); + log_cpu_state(env, 0); + } + + mcc->parent_reset(s); + + memset(env, 0, offsetof(CPUM68KState, breakpoints)); +#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(env, 1); +} + +/* CPU models */ + +static void m5206_cpu_initfn(Object *obj) +{ + M68kCPU *cpu = M68K_CPU(obj); + CPUM68KState *env = &cpu->env; + + m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); +} + +static void m5208_cpu_initfn(Object *obj) +{ + M68kCPU *cpu = M68K_CPU(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(Object *obj) +{ + M68kCPU *cpu = M68K_CPU(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(Object *obj) +{ + M68kCPU *cpu = M68K_CPU(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)(Object *obj); +} M68kCPUInfo; + +static const M68kCPUInfo m68k_cpus[] = { + { .name = "m5206", .instance_init = m5206_cpu_initfn }, + { .name = "m5208", .instance_init = m5208_cpu_initfn }, + { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn }, + { .name = "any", .instance_init = any_cpu_initfn }, +}; + +static void m68k_cpu_initfn(Object *obj) +{ + M68kCPU *cpu = M68K_CPU(obj); + CPUM68KState *env = &cpu->env; + + cpu_exec_init(env); +} + +static void m68k_cpu_class_init(ObjectClass *c, void *data) +{ + M68kCPUClass *mcc = M68K_CPU_CLASS(c); + CPUClass *cc = CPU_CLASS(c); + + mcc->parent_reset = cc->reset; + cc->reset = m68k_cpu_reset; +} + +static void register_cpu_type(const M68kCPUInfo *info) +{ + TypeInfo type_info = { + .name = info->name, + .parent = TYPE_M68K_CPU, + .instance_init = info->instance_init, + }; + + type_register_static(&type_info); +} + +static const TypeInfo m68k_cpu_type_info = { + .name = TYPE_M68K_CPU, + .parent = TYPE_CPU, + .instance_size = sizeof(M68kCPU), + .instance_init = m68k_cpu_initfn, + .abstract = true, + .class_size = sizeof(M68kCPUClass), + .class_init = m68k_cpu_class_init, +}; + +static void m68k_cpu_register_types(void) +{ + int i; + + type_register_static(&m68k_cpu_type_info); + for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) { + register_cpu_type(&m68k_cpus[i]); + } +} + +type_init(m68k_cpu_register_types) |