diff options
Diffstat (limited to 'target/sh4/cpu.c')
| -rw-r--r-- | target/sh4/cpu.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c new file mode 100644 index 0000000000..a38f6a6ded --- /dev/null +++ b/target/sh4/cpu.c @@ -0,0 +1,332 @@ +/* + * QEMU SuperH CPU + * + * Copyright (c) 2005 Samuel Tardieu + * 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 "qemu/osdep.h" +#include "qapi/error.h" +#include "cpu.h" +#include "qemu-common.h" +#include "migration/vmstate.h" +#include "exec/exec-all.h" + + +static void superh_cpu_set_pc(CPUState *cs, vaddr value) +{ + SuperHCPU *cpu = SUPERH_CPU(cs); + + cpu->env.pc = value; +} + +static void superh_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb) +{ + SuperHCPU *cpu = SUPERH_CPU(cs); + + cpu->env.pc = tb->pc; + cpu->env.flags = tb->flags; +} + +static bool superh_cpu_has_work(CPUState *cs) +{ + return cs->interrupt_request & CPU_INTERRUPT_HARD; +} + +/* CPUClass::reset() */ +static void superh_cpu_reset(CPUState *s) +{ + SuperHCPU *cpu = SUPERH_CPU(s); + SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu); + CPUSH4State *env = &cpu->env; + + scc->parent_reset(s); + + memset(env, 0, offsetof(CPUSH4State, id)); + tlb_flush(s, 1); + + env->pc = 0xA0000000; +#if defined(CONFIG_USER_ONLY) + env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */ + set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */ +#else + env->sr = (1u << SR_MD) | (1u << SR_RB) | (1u << SR_BL) | + (1u << SR_I3) | (1u << SR_I2) | (1u << SR_I1) | (1u << SR_I0); + env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */ + set_float_rounding_mode(float_round_to_zero, &env->fp_status); + set_flush_to_zero(1, &env->fp_status); +#endif + set_default_nan_mode(1, &env->fp_status); + set_snan_bit_is_one(1, &env->fp_status); +} + +static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info) +{ + info->mach = bfd_mach_sh4; + info->print_insn = print_insn_sh; +} + +typedef struct SuperHCPUListState { + fprintf_function cpu_fprintf; + FILE *file; +} SuperHCPUListState; + +/* Sort alphabetically by type name. */ +static gint superh_cpu_list_compare(gconstpointer a, gconstpointer b) +{ + ObjectClass *class_a = (ObjectClass *)a; + ObjectClass *class_b = (ObjectClass *)b; + const char *name_a, *name_b; + + name_a = object_class_get_name(class_a); + name_b = object_class_get_name(class_b); + return strcmp(name_a, name_b); +} + +static void superh_cpu_list_entry(gpointer data, gpointer user_data) +{ + ObjectClass *oc = data; + SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); + SuperHCPUListState *s = user_data; + + (*s->cpu_fprintf)(s->file, "%s\n", + scc->name); +} + +void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf) +{ + SuperHCPUListState s = { + .cpu_fprintf = cpu_fprintf, + .file = f, + }; + GSList *list; + + list = object_class_get_list(TYPE_SUPERH_CPU, false); + list = g_slist_sort(list, superh_cpu_list_compare); + g_slist_foreach(list, superh_cpu_list_entry, &s); + g_slist_free(list); +} + +static gint superh_cpu_name_compare(gconstpointer a, gconstpointer b) +{ + const SuperHCPUClass *scc = SUPERH_CPU_CLASS(a); + const char *name = b; + + return strcasecmp(scc->name, name); +} + +static ObjectClass *superh_cpu_class_by_name(const char *cpu_model) +{ + ObjectClass *oc; + GSList *list, *item; + + if (cpu_model == NULL) { + return NULL; + } + if (strcasecmp(cpu_model, "any") == 0) { + return object_class_by_name(TYPE_SH7750R_CPU); + } + + oc = object_class_by_name(cpu_model); + if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL + && !object_class_is_abstract(oc)) { + return oc; + } + + oc = NULL; + list = object_class_get_list(TYPE_SUPERH_CPU, false); + item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare); + if (item != NULL) { + oc = item->data; + } + g_slist_free(list); + return oc; +} + +SuperHCPU *cpu_sh4_init(const char *cpu_model) +{ + return SUPERH_CPU(cpu_generic_init(TYPE_SUPERH_CPU, cpu_model)); +} + +static void sh7750r_cpu_initfn(Object *obj) +{ + SuperHCPU *cpu = SUPERH_CPU(obj); + CPUSH4State *env = &cpu->env; + + env->id = SH_CPU_SH7750R; + env->features = SH_FEATURE_BCR3_AND_BCR4; +} + +static void sh7750r_class_init(ObjectClass *oc, void *data) +{ + SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); + + scc->name = "SH7750R"; + scc->pvr = 0x00050000; + scc->prr = 0x00000100; + scc->cvr = 0x00110000; +} + +static const TypeInfo sh7750r_type_info = { + .name = TYPE_SH7750R_CPU, + .parent = TYPE_SUPERH_CPU, + .class_init = sh7750r_class_init, + .instance_init = sh7750r_cpu_initfn, +}; + +static void sh7751r_cpu_initfn(Object *obj) +{ + SuperHCPU *cpu = SUPERH_CPU(obj); + CPUSH4State *env = &cpu->env; + + env->id = SH_CPU_SH7751R; + env->features = SH_FEATURE_BCR3_AND_BCR4; +} + +static void sh7751r_class_init(ObjectClass *oc, void *data) +{ + SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); + + scc->name = "SH7751R"; + scc->pvr = 0x04050005; + scc->prr = 0x00000113; + scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */ +} + +static const TypeInfo sh7751r_type_info = { + .name = TYPE_SH7751R_CPU, + .parent = TYPE_SUPERH_CPU, + .class_init = sh7751r_class_init, + .instance_init = sh7751r_cpu_initfn, +}; + +static void sh7785_cpu_initfn(Object *obj) +{ + SuperHCPU *cpu = SUPERH_CPU(obj); + CPUSH4State *env = &cpu->env; + + env->id = SH_CPU_SH7785; + env->features = SH_FEATURE_SH4A; +} + +static void sh7785_class_init(ObjectClass *oc, void *data) +{ + SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); + + scc->name = "SH7785"; + scc->pvr = 0x10300700; + scc->prr = 0x00000200; + scc->cvr = 0x71440211; +} + +static const TypeInfo sh7785_type_info = { + .name = TYPE_SH7785_CPU, + .parent = TYPE_SUPERH_CPU, + .class_init = sh7785_class_init, + .instance_init = sh7785_cpu_initfn, +}; + +static void superh_cpu_realizefn(DeviceState *dev, Error **errp) +{ + CPUState *cs = CPU(dev); + SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev); + Error *local_err = NULL; + + cpu_exec_realizefn(cs, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return; + } + + cpu_reset(cs); + qemu_init_vcpu(cs); + + scc->parent_realize(dev, errp); +} + +static void superh_cpu_initfn(Object *obj) +{ + CPUState *cs = CPU(obj); + SuperHCPU *cpu = SUPERH_CPU(obj); + CPUSH4State *env = &cpu->env; + + cs->env_ptr = env; + + env->movcal_backup_tail = &(env->movcal_backup); + + if (tcg_enabled()) { + sh4_translate_init(); + } +} + +static const VMStateDescription vmstate_sh_cpu = { + .name = "cpu", + .unmigratable = 1, +}; + +static void superh_cpu_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(oc); + CPUClass *cc = CPU_CLASS(oc); + SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); + + scc->parent_realize = dc->realize; + dc->realize = superh_cpu_realizefn; + + scc->parent_reset = cc->reset; + cc->reset = superh_cpu_reset; + + cc->class_by_name = superh_cpu_class_by_name; + cc->has_work = superh_cpu_has_work; + cc->do_interrupt = superh_cpu_do_interrupt; + cc->cpu_exec_interrupt = superh_cpu_exec_interrupt; + cc->dump_state = superh_cpu_dump_state; + cc->set_pc = superh_cpu_set_pc; + cc->synchronize_from_tb = superh_cpu_synchronize_from_tb; + cc->gdb_read_register = superh_cpu_gdb_read_register; + cc->gdb_write_register = superh_cpu_gdb_write_register; +#ifdef CONFIG_USER_ONLY + cc->handle_mmu_fault = superh_cpu_handle_mmu_fault; +#else + cc->get_phys_page_debug = superh_cpu_get_phys_page_debug; +#endif + cc->disas_set_info = superh_cpu_disas_set_info; + + cc->gdb_num_core_regs = 59; + + dc->vmsd = &vmstate_sh_cpu; +} + +static const TypeInfo superh_cpu_type_info = { + .name = TYPE_SUPERH_CPU, + .parent = TYPE_CPU, + .instance_size = sizeof(SuperHCPU), + .instance_init = superh_cpu_initfn, + .abstract = true, + .class_size = sizeof(SuperHCPUClass), + .class_init = superh_cpu_class_init, +}; + +static void superh_cpu_register_types(void) +{ + type_register_static(&superh_cpu_type_info); + type_register_static(&sh7750r_type_info); + type_register_static(&sh7751r_type_info); + type_register_static(&sh7785_type_info); +} + +type_init(superh_cpu_register_types) |