1 /* 2 * QEMU SuperH CPU 3 * 4 * Copyright (c) 2005 Samuel Tardieu 5 * Copyright (c) 2012 SUSE LINUX Products GmbH 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see 19 * <http://www.gnu.org/licenses/lgpl-2.1.html> 20 */ 21 22 #include "qemu/osdep.h" 23 #include "qapi/error.h" 24 #include "qemu/qemu-print.h" 25 #include "cpu.h" 26 #include "migration/vmstate.h" 27 #include "exec/exec-all.h" 28 #include "fpu/softfloat-helpers.h" 29 30 static void superh_cpu_set_pc(CPUState *cs, vaddr value) 31 { 32 SuperHCPU *cpu = SUPERH_CPU(cs); 33 34 cpu->env.pc = value; 35 } 36 37 static void superh_cpu_synchronize_from_tb(CPUState *cs, 38 const TranslationBlock *tb) 39 { 40 SuperHCPU *cpu = SUPERH_CPU(cs); 41 42 cpu->env.pc = tb->pc; 43 cpu->env.flags = tb->flags & TB_FLAG_ENVFLAGS_MASK; 44 } 45 46 static bool superh_cpu_has_work(CPUState *cs) 47 { 48 return cs->interrupt_request & CPU_INTERRUPT_HARD; 49 } 50 51 static void superh_cpu_reset(DeviceState *dev) 52 { 53 CPUState *s = CPU(dev); 54 SuperHCPU *cpu = SUPERH_CPU(s); 55 SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu); 56 CPUSH4State *env = &cpu->env; 57 58 scc->parent_reset(dev); 59 60 memset(env, 0, offsetof(CPUSH4State, end_reset_fields)); 61 62 env->pc = 0xA0000000; 63 #if defined(CONFIG_USER_ONLY) 64 env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */ 65 set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */ 66 #else 67 env->sr = (1u << SR_MD) | (1u << SR_RB) | (1u << SR_BL) | 68 (1u << SR_I3) | (1u << SR_I2) | (1u << SR_I1) | (1u << SR_I0); 69 env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */ 70 set_float_rounding_mode(float_round_to_zero, &env->fp_status); 71 set_flush_to_zero(1, &env->fp_status); 72 #endif 73 set_default_nan_mode(1, &env->fp_status); 74 } 75 76 static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info) 77 { 78 info->mach = bfd_mach_sh4; 79 info->print_insn = print_insn_sh; 80 } 81 82 static void superh_cpu_list_entry(gpointer data, gpointer user_data) 83 { 84 const char *typename = object_class_get_name(OBJECT_CLASS(data)); 85 int len = strlen(typename) - strlen(SUPERH_CPU_TYPE_SUFFIX); 86 87 qemu_printf("%.*s\n", len, typename); 88 } 89 90 void sh4_cpu_list(void) 91 { 92 GSList *list; 93 94 list = object_class_get_list_sorted(TYPE_SUPERH_CPU, false); 95 g_slist_foreach(list, superh_cpu_list_entry, NULL); 96 g_slist_free(list); 97 } 98 99 static ObjectClass *superh_cpu_class_by_name(const char *cpu_model) 100 { 101 ObjectClass *oc; 102 char *s, *typename = NULL; 103 104 s = g_ascii_strdown(cpu_model, -1); 105 if (strcmp(s, "any") == 0) { 106 oc = object_class_by_name(TYPE_SH7750R_CPU); 107 goto out; 108 } 109 110 typename = g_strdup_printf(SUPERH_CPU_TYPE_NAME("%s"), s); 111 oc = object_class_by_name(typename); 112 if (oc != NULL && object_class_is_abstract(oc)) { 113 oc = NULL; 114 } 115 116 out: 117 g_free(s); 118 g_free(typename); 119 return oc; 120 } 121 122 static void sh7750r_cpu_initfn(Object *obj) 123 { 124 SuperHCPU *cpu = SUPERH_CPU(obj); 125 CPUSH4State *env = &cpu->env; 126 127 env->id = SH_CPU_SH7750R; 128 env->features = SH_FEATURE_BCR3_AND_BCR4; 129 } 130 131 static void sh7750r_class_init(ObjectClass *oc, void *data) 132 { 133 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 134 135 scc->pvr = 0x00050000; 136 scc->prr = 0x00000100; 137 scc->cvr = 0x00110000; 138 } 139 140 static void sh7751r_cpu_initfn(Object *obj) 141 { 142 SuperHCPU *cpu = SUPERH_CPU(obj); 143 CPUSH4State *env = &cpu->env; 144 145 env->id = SH_CPU_SH7751R; 146 env->features = SH_FEATURE_BCR3_AND_BCR4; 147 } 148 149 static void sh7751r_class_init(ObjectClass *oc, void *data) 150 { 151 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 152 153 scc->pvr = 0x04050005; 154 scc->prr = 0x00000113; 155 scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */ 156 } 157 158 static void sh7785_cpu_initfn(Object *obj) 159 { 160 SuperHCPU *cpu = SUPERH_CPU(obj); 161 CPUSH4State *env = &cpu->env; 162 163 env->id = SH_CPU_SH7785; 164 env->features = SH_FEATURE_SH4A; 165 } 166 167 static void sh7785_class_init(ObjectClass *oc, void *data) 168 { 169 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 170 171 scc->pvr = 0x10300700; 172 scc->prr = 0x00000200; 173 scc->cvr = 0x71440211; 174 } 175 176 static void superh_cpu_realizefn(DeviceState *dev, Error **errp) 177 { 178 CPUState *cs = CPU(dev); 179 SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev); 180 Error *local_err = NULL; 181 182 cpu_exec_realizefn(cs, &local_err); 183 if (local_err != NULL) { 184 error_propagate(errp, local_err); 185 return; 186 } 187 188 cpu_reset(cs); 189 qemu_init_vcpu(cs); 190 191 scc->parent_realize(dev, errp); 192 } 193 194 static void superh_cpu_initfn(Object *obj) 195 { 196 SuperHCPU *cpu = SUPERH_CPU(obj); 197 CPUSH4State *env = &cpu->env; 198 199 cpu_set_cpustate_pointers(cpu); 200 201 env->movcal_backup_tail = &(env->movcal_backup); 202 } 203 204 static const VMStateDescription vmstate_sh_cpu = { 205 .name = "cpu", 206 .unmigratable = 1, 207 }; 208 209 static void superh_cpu_class_init(ObjectClass *oc, void *data) 210 { 211 DeviceClass *dc = DEVICE_CLASS(oc); 212 CPUClass *cc = CPU_CLASS(oc); 213 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 214 215 device_class_set_parent_realize(dc, superh_cpu_realizefn, 216 &scc->parent_realize); 217 218 device_class_set_parent_reset(dc, superh_cpu_reset, &scc->parent_reset); 219 220 cc->class_by_name = superh_cpu_class_by_name; 221 cc->has_work = superh_cpu_has_work; 222 cc->do_interrupt = superh_cpu_do_interrupt; 223 cc->cpu_exec_interrupt = superh_cpu_exec_interrupt; 224 cc->dump_state = superh_cpu_dump_state; 225 cc->set_pc = superh_cpu_set_pc; 226 cc->synchronize_from_tb = superh_cpu_synchronize_from_tb; 227 cc->gdb_read_register = superh_cpu_gdb_read_register; 228 cc->gdb_write_register = superh_cpu_gdb_write_register; 229 cc->tlb_fill = superh_cpu_tlb_fill; 230 #ifndef CONFIG_USER_ONLY 231 cc->do_unaligned_access = superh_cpu_do_unaligned_access; 232 cc->get_phys_page_debug = superh_cpu_get_phys_page_debug; 233 #endif 234 cc->disas_set_info = superh_cpu_disas_set_info; 235 cc->tcg_initialize = sh4_translate_init; 236 237 cc->gdb_num_core_regs = 59; 238 239 dc->vmsd = &vmstate_sh_cpu; 240 } 241 242 #define DEFINE_SUPERH_CPU_TYPE(type_name, cinit, initfn) \ 243 { \ 244 .name = type_name, \ 245 .parent = TYPE_SUPERH_CPU, \ 246 .class_init = cinit, \ 247 .instance_init = initfn, \ 248 } 249 static const TypeInfo superh_cpu_type_infos[] = { 250 { 251 .name = TYPE_SUPERH_CPU, 252 .parent = TYPE_CPU, 253 .instance_size = sizeof(SuperHCPU), 254 .instance_init = superh_cpu_initfn, 255 .abstract = true, 256 .class_size = sizeof(SuperHCPUClass), 257 .class_init = superh_cpu_class_init, 258 }, 259 DEFINE_SUPERH_CPU_TYPE(TYPE_SH7750R_CPU, sh7750r_class_init, 260 sh7750r_cpu_initfn), 261 DEFINE_SUPERH_CPU_TYPE(TYPE_SH7751R_CPU, sh7751r_class_init, 262 sh7751r_cpu_initfn), 263 DEFINE_SUPERH_CPU_TYPE(TYPE_SH7785_CPU, sh7785_class_init, 264 sh7785_cpu_initfn), 265 266 }; 267 268 DEFINE_TYPES(superh_cpu_type_infos) 269