/* * QEMU OpenRISC CPU * * Copyright (c) 2012 Jia Liu <proljc@gmail.com> * * 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 <http://www.gnu.org/licenses/>. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "cpu.h" #include "qemu-common.h" #include "exec/exec-all.h" static void openrisc_cpu_set_pc(CPUState *cs, vaddr value) { OpenRISCCPU *cpu = OPENRISC_CPU(cs); cpu->env.pc = value; } static bool openrisc_cpu_has_work(CPUState *cs) { return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_TIMER); } /* CPUClass::reset() */ static void openrisc_cpu_reset(CPUState *s) { OpenRISCCPU *cpu = OPENRISC_CPU(s); OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu); occ->parent_reset(s); #ifndef CONFIG_USER_ONLY memset(&cpu->env, 0, offsetof(CPUOpenRISCState, tlb)); #else memset(&cpu->env, 0, offsetof(CPUOpenRISCState, irq)); #endif tlb_flush(s, 1); /*tb_flush(&cpu->env); FIXME: Do we need it? */ cpu->env.pc = 0x100; cpu->env.sr = SR_FO | SR_SM; s->exception_index = -1; cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP; cpu->env.cpucfgr = CPUCFGR_OB32S | CPUCFGR_OF32S; cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2)); cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2)); #ifndef CONFIG_USER_ONLY cpu->env.picmr = 0x00000000; cpu->env.picsr = 0x00000000; cpu->env.ttmr = 0x00000000; cpu->env.ttcr = 0x00000000; #endif } static inline void set_feature(OpenRISCCPU *cpu, int feature) { cpu->feature |= feature; cpu->env.cpucfgr = cpu->feature; } static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev); qemu_init_vcpu(cs); cpu_reset(cs); occ->parent_realize(dev, errp); } static void openrisc_cpu_initfn(Object *obj) { CPUState *cs = CPU(obj); OpenRISCCPU *cpu = OPENRISC_CPU(obj); static int inited; cs->env_ptr = &cpu->env; cpu_exec_init(cs, &error_abort); #ifndef CONFIG_USER_ONLY cpu_openrisc_mmu_init(cpu); #endif if (tcg_enabled() && !inited) { inited = 1; openrisc_translate_init(); } } /* CPU models */ static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model) { ObjectClass *oc; char *typename; if (cpu_model == NULL) { return NULL; } typename = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, cpu_model); oc = object_class_by_name(typename); g_free(typename); if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) || object_class_is_abstract(oc))) { return NULL; } return oc; } static void or1200_initfn(Object *obj) { OpenRISCCPU *cpu = OPENRISC_CPU(obj); set_feature(cpu, OPENRISC_FEATURE_OB32S); set_feature(cpu, OPENRISC_FEATURE_OF32S); } static void openrisc_any_initfn(Object *obj) { OpenRISCCPU *cpu = OPENRISC_CPU(obj); set_feature(cpu, OPENRISC_FEATURE_OB32S); } typedef struct OpenRISCCPUInfo { const char *name; void (*initfn)(Object *obj); } OpenRISCCPUInfo; static const OpenRISCCPUInfo openrisc_cpus[] = { { .name = "or1200", .initfn = or1200_initfn }, { .name = "any", .initfn = openrisc_any_initfn }, }; static void openrisc_cpu_class_init(ObjectClass *oc, void *data) { OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc); CPUClass *cc = CPU_CLASS(occ); DeviceClass *dc = DEVICE_CLASS(oc); occ->parent_realize = dc->realize; dc->realize = openrisc_cpu_realizefn; occ->parent_reset = cc->reset; cc->reset = openrisc_cpu_reset; cc->class_by_name = openrisc_cpu_class_by_name; cc->has_work = openrisc_cpu_has_work; cc->do_interrupt = openrisc_cpu_do_interrupt; cc->cpu_exec_interrupt = openrisc_cpu_exec_interrupt; cc->dump_state = openrisc_cpu_dump_state; cc->set_pc = openrisc_cpu_set_pc; cc->gdb_read_register = openrisc_cpu_gdb_read_register; cc->gdb_write_register = openrisc_cpu_gdb_write_register; #ifdef CONFIG_USER_ONLY cc->handle_mmu_fault = openrisc_cpu_handle_mmu_fault; #else cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug; dc->vmsd = &vmstate_openrisc_cpu; #endif cc->gdb_num_core_regs = 32 + 3; /* * Reason: openrisc_cpu_initfn() calls cpu_exec_init(), which saves * the object in cpus -> dangling pointer after final * object_unref(). */ dc->cannot_destroy_with_object_finalize_yet = true; } static void cpu_register(const OpenRISCCPUInfo *info) { TypeInfo type_info = { .parent = TYPE_OPENRISC_CPU, .instance_size = sizeof(OpenRISCCPU), .instance_init = info->initfn, .class_size = sizeof(OpenRISCCPUClass), }; type_info.name = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, info->name); type_register(&type_info); g_free((void *)type_info.name); } static const TypeInfo openrisc_cpu_type_info = { .name = TYPE_OPENRISC_CPU, .parent = TYPE_CPU, .instance_size = sizeof(OpenRISCCPU), .instance_init = openrisc_cpu_initfn, .abstract = true, .class_size = sizeof(OpenRISCCPUClass), .class_init = openrisc_cpu_class_init, }; static void openrisc_cpu_register_types(void) { int i; type_register_static(&openrisc_cpu_type_info); for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) { cpu_register(&openrisc_cpus[i]); } } OpenRISCCPU *cpu_openrisc_init(const char *cpu_model) { return OPENRISC_CPU(cpu_generic_init(TYPE_OPENRISC_CPU, cpu_model)); } /* Sort alphabetically by type name, except for "any". */ static gint openrisc_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); if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) { return 1; } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) { return -1; } else { return strcmp(name_a, name_b); } } static void openrisc_cpu_list_entry(gpointer data, gpointer user_data) { ObjectClass *oc = data; CPUListState *s = user_data; const char *typename; char *name; typename = object_class_get_name(oc); name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_OPENRISC_CPU)); (*s->cpu_fprintf)(s->file, " %s\n", name); g_free(name); } void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf) { CPUListState s = { .file = f, .cpu_fprintf = cpu_fprintf, }; GSList *list; list = object_class_get_list(TYPE_OPENRISC_CPU, false); list = g_slist_sort(list, openrisc_cpu_list_compare); (*cpu_fprintf)(f, "Available CPUs:\n"); g_slist_foreach(list, openrisc_cpu_list_entry, &s); g_slist_free(list); } type_init(openrisc_cpu_register_types)