1 /* 2 * QEMU Alpha CPU 3 * 4 * Copyright (c) 2007 Jocelyn Mayer 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 "cpu.h" 25 #include "qemu-common.h" 26 #include "exec/exec-all.h" 27 28 29 static void alpha_cpu_set_pc(CPUState *cs, vaddr value) 30 { 31 AlphaCPU *cpu = ALPHA_CPU(cs); 32 33 cpu->env.pc = value; 34 } 35 36 static bool alpha_cpu_has_work(CPUState *cs) 37 { 38 /* Here we are checking to see if the CPU should wake up from HALT. 39 We will have gotten into this state only for WTINT from PALmode. */ 40 /* ??? I'm not sure how the IPL state works with WTINT to keep a CPU 41 asleep even if (some) interrupts have been asserted. For now, 42 assume that if a CPU really wants to stay asleep, it will mask 43 interrupts at the chipset level, which will prevent these bits 44 from being set in the first place. */ 45 return cs->interrupt_request & (CPU_INTERRUPT_HARD 46 | CPU_INTERRUPT_TIMER 47 | CPU_INTERRUPT_SMP 48 | CPU_INTERRUPT_MCHK); 49 } 50 51 static void alpha_cpu_disas_set_info(CPUState *cpu, disassemble_info *info) 52 { 53 info->mach = bfd_mach_alpha_ev6; 54 info->print_insn = print_insn_alpha; 55 } 56 57 static void alpha_cpu_realizefn(DeviceState *dev, Error **errp) 58 { 59 CPUState *cs = CPU(dev); 60 AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev); 61 Error *local_err = NULL; 62 63 cpu_exec_realizefn(cs, &local_err); 64 if (local_err != NULL) { 65 error_propagate(errp, local_err); 66 return; 67 } 68 69 qemu_init_vcpu(cs); 70 71 acc->parent_realize(dev, errp); 72 } 73 74 static void alpha_cpu_list_entry(gpointer data, gpointer user_data) 75 { 76 ObjectClass *oc = data; 77 CPUListState *s = user_data; 78 79 (*s->cpu_fprintf)(s->file, " %s\n", 80 object_class_get_name(oc)); 81 } 82 83 void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf) 84 { 85 CPUListState s = { 86 .file = f, 87 .cpu_fprintf = cpu_fprintf, 88 }; 89 GSList *list; 90 91 list = object_class_get_list_sorted(TYPE_ALPHA_CPU, false); 92 (*cpu_fprintf)(f, "Available CPUs:\n"); 93 g_slist_foreach(list, alpha_cpu_list_entry, &s); 94 g_slist_free(list); 95 } 96 97 /* Models */ 98 typedef struct AlphaCPUAlias { 99 const char *alias; 100 const char *typename; 101 } AlphaCPUAlias; 102 103 static const AlphaCPUAlias alpha_cpu_aliases[] = { 104 { "21064", ALPHA_CPU_TYPE_NAME("ev4") }, 105 { "21164", ALPHA_CPU_TYPE_NAME("ev5") }, 106 { "21164a", ALPHA_CPU_TYPE_NAME("ev56") }, 107 { "21164pc", ALPHA_CPU_TYPE_NAME("pca56") }, 108 { "21264", ALPHA_CPU_TYPE_NAME("ev6") }, 109 { "21264a", ALPHA_CPU_TYPE_NAME("ev67") }, 110 }; 111 112 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model) 113 { 114 ObjectClass *oc; 115 char *typename; 116 int i; 117 118 oc = object_class_by_name(cpu_model); 119 if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL && 120 !object_class_is_abstract(oc)) { 121 return oc; 122 } 123 124 for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) { 125 if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) { 126 oc = object_class_by_name(alpha_cpu_aliases[i].typename); 127 assert(oc != NULL && !object_class_is_abstract(oc)); 128 return oc; 129 } 130 } 131 132 typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); 133 oc = object_class_by_name(typename); 134 g_free(typename); 135 if (oc != NULL && object_class_is_abstract(oc)) { 136 oc = NULL; 137 } 138 139 /* TODO: remove match everything nonsense */ 140 /* Default to ev67; no reason not to emulate insns by default. */ 141 if (!oc) { 142 oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); 143 } 144 145 return oc; 146 } 147 148 static void ev4_cpu_initfn(Object *obj) 149 { 150 AlphaCPU *cpu = ALPHA_CPU(obj); 151 CPUAlphaState *env = &cpu->env; 152 153 env->implver = IMPLVER_2106x; 154 } 155 156 static void ev5_cpu_initfn(Object *obj) 157 { 158 AlphaCPU *cpu = ALPHA_CPU(obj); 159 CPUAlphaState *env = &cpu->env; 160 161 env->implver = IMPLVER_21164; 162 } 163 164 static void ev56_cpu_initfn(Object *obj) 165 { 166 AlphaCPU *cpu = ALPHA_CPU(obj); 167 CPUAlphaState *env = &cpu->env; 168 169 env->amask |= AMASK_BWX; 170 } 171 172 static void pca56_cpu_initfn(Object *obj) 173 { 174 AlphaCPU *cpu = ALPHA_CPU(obj); 175 CPUAlphaState *env = &cpu->env; 176 177 env->amask |= AMASK_MVI; 178 } 179 180 static void ev6_cpu_initfn(Object *obj) 181 { 182 AlphaCPU *cpu = ALPHA_CPU(obj); 183 CPUAlphaState *env = &cpu->env; 184 185 env->implver = IMPLVER_21264; 186 env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP; 187 } 188 189 static void ev67_cpu_initfn(Object *obj) 190 { 191 AlphaCPU *cpu = ALPHA_CPU(obj); 192 CPUAlphaState *env = &cpu->env; 193 194 env->amask |= AMASK_CIX | AMASK_PREFETCH; 195 } 196 197 static void alpha_cpu_initfn(Object *obj) 198 { 199 CPUState *cs = CPU(obj); 200 AlphaCPU *cpu = ALPHA_CPU(obj); 201 CPUAlphaState *env = &cpu->env; 202 203 cs->env_ptr = env; 204 205 env->lock_addr = -1; 206 #if defined(CONFIG_USER_ONLY) 207 env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN; 208 cpu_alpha_store_fpcr(env, (FPCR_INVD | FPCR_DZED | FPCR_OVFD 209 | FPCR_UNFD | FPCR_INED | FPCR_DNOD 210 | FPCR_DYN_NORMAL)); 211 #else 212 env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN; 213 #endif 214 } 215 216 static void alpha_cpu_class_init(ObjectClass *oc, void *data) 217 { 218 DeviceClass *dc = DEVICE_CLASS(oc); 219 CPUClass *cc = CPU_CLASS(oc); 220 AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc); 221 222 device_class_set_parent_realize(dc, alpha_cpu_realizefn, 223 &acc->parent_realize); 224 225 cc->class_by_name = alpha_cpu_class_by_name; 226 cc->has_work = alpha_cpu_has_work; 227 cc->do_interrupt = alpha_cpu_do_interrupt; 228 cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt; 229 cc->dump_state = alpha_cpu_dump_state; 230 cc->set_pc = alpha_cpu_set_pc; 231 cc->gdb_read_register = alpha_cpu_gdb_read_register; 232 cc->gdb_write_register = alpha_cpu_gdb_write_register; 233 #ifdef CONFIG_USER_ONLY 234 cc->handle_mmu_fault = alpha_cpu_handle_mmu_fault; 235 #else 236 cc->do_transaction_failed = alpha_cpu_do_transaction_failed; 237 cc->do_unaligned_access = alpha_cpu_do_unaligned_access; 238 cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug; 239 dc->vmsd = &vmstate_alpha_cpu; 240 #endif 241 cc->disas_set_info = alpha_cpu_disas_set_info; 242 cc->tcg_initialize = alpha_translate_init; 243 244 cc->gdb_num_core_regs = 67; 245 } 246 247 #define DEFINE_ALPHA_CPU_TYPE(base_type, cpu_model, initfn) \ 248 { \ 249 .parent = base_type, \ 250 .instance_init = initfn, \ 251 .name = ALPHA_CPU_TYPE_NAME(cpu_model), \ 252 } 253 254 static const TypeInfo alpha_cpu_type_infos[] = { 255 { 256 .name = TYPE_ALPHA_CPU, 257 .parent = TYPE_CPU, 258 .instance_size = sizeof(AlphaCPU), 259 .instance_init = alpha_cpu_initfn, 260 .abstract = true, 261 .class_size = sizeof(AlphaCPUClass), 262 .class_init = alpha_cpu_class_init, 263 }, 264 DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev4", ev4_cpu_initfn), 265 DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev5", ev5_cpu_initfn), 266 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev5"), "ev56", ev56_cpu_initfn), 267 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev56"), "pca56", 268 pca56_cpu_initfn), 269 DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev6", ev6_cpu_initfn), 270 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev6"), "ev67", ev67_cpu_initfn), 271 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev67"), "ev68", NULL), 272 }; 273 274 DEFINE_TYPES(alpha_cpu_type_infos) 275