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 "qemu/qemu-print.h" 25 #include "cpu.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 78 qemu_printf(" %s\n", object_class_get_name(oc)); 79 } 80 81 void alpha_cpu_list(void) 82 { 83 GSList *list; 84 85 list = object_class_get_list_sorted(TYPE_ALPHA_CPU, false); 86 qemu_printf("Available CPUs:\n"); 87 g_slist_foreach(list, alpha_cpu_list_entry, NULL); 88 g_slist_free(list); 89 } 90 91 /* Models */ 92 typedef struct AlphaCPUAlias { 93 const char *alias; 94 const char *typename; 95 } AlphaCPUAlias; 96 97 static const AlphaCPUAlias alpha_cpu_aliases[] = { 98 { "21064", ALPHA_CPU_TYPE_NAME("ev4") }, 99 { "21164", ALPHA_CPU_TYPE_NAME("ev5") }, 100 { "21164a", ALPHA_CPU_TYPE_NAME("ev56") }, 101 { "21164pc", ALPHA_CPU_TYPE_NAME("pca56") }, 102 { "21264", ALPHA_CPU_TYPE_NAME("ev6") }, 103 { "21264a", ALPHA_CPU_TYPE_NAME("ev67") }, 104 }; 105 106 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model) 107 { 108 ObjectClass *oc; 109 char *typename; 110 int i; 111 112 oc = object_class_by_name(cpu_model); 113 if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL && 114 !object_class_is_abstract(oc)) { 115 return oc; 116 } 117 118 for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) { 119 if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) { 120 oc = object_class_by_name(alpha_cpu_aliases[i].typename); 121 assert(oc != NULL && !object_class_is_abstract(oc)); 122 return oc; 123 } 124 } 125 126 typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); 127 oc = object_class_by_name(typename); 128 g_free(typename); 129 if (oc != NULL && object_class_is_abstract(oc)) { 130 oc = NULL; 131 } 132 133 /* TODO: remove match everything nonsense */ 134 /* Default to ev67; no reason not to emulate insns by default. */ 135 if (!oc) { 136 oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); 137 } 138 139 return oc; 140 } 141 142 static void ev4_cpu_initfn(Object *obj) 143 { 144 AlphaCPU *cpu = ALPHA_CPU(obj); 145 CPUAlphaState *env = &cpu->env; 146 147 env->implver = IMPLVER_2106x; 148 } 149 150 static void ev5_cpu_initfn(Object *obj) 151 { 152 AlphaCPU *cpu = ALPHA_CPU(obj); 153 CPUAlphaState *env = &cpu->env; 154 155 env->implver = IMPLVER_21164; 156 } 157 158 static void ev56_cpu_initfn(Object *obj) 159 { 160 AlphaCPU *cpu = ALPHA_CPU(obj); 161 CPUAlphaState *env = &cpu->env; 162 163 env->amask |= AMASK_BWX; 164 } 165 166 static void pca56_cpu_initfn(Object *obj) 167 { 168 AlphaCPU *cpu = ALPHA_CPU(obj); 169 CPUAlphaState *env = &cpu->env; 170 171 env->amask |= AMASK_MVI; 172 } 173 174 static void ev6_cpu_initfn(Object *obj) 175 { 176 AlphaCPU *cpu = ALPHA_CPU(obj); 177 CPUAlphaState *env = &cpu->env; 178 179 env->implver = IMPLVER_21264; 180 env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP; 181 } 182 183 static void ev67_cpu_initfn(Object *obj) 184 { 185 AlphaCPU *cpu = ALPHA_CPU(obj); 186 CPUAlphaState *env = &cpu->env; 187 188 env->amask |= AMASK_CIX | AMASK_PREFETCH; 189 } 190 191 static void alpha_cpu_initfn(Object *obj) 192 { 193 AlphaCPU *cpu = ALPHA_CPU(obj); 194 CPUAlphaState *env = &cpu->env; 195 196 cpu_set_cpustate_pointers(cpu); 197 198 env->lock_addr = -1; 199 #if defined(CONFIG_USER_ONLY) 200 env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN; 201 cpu_alpha_store_fpcr(env, (uint64_t)(FPCR_INVD | FPCR_DZED | FPCR_OVFD 202 | FPCR_UNFD | FPCR_INED | FPCR_DNOD 203 | FPCR_DYN_NORMAL) << 32); 204 #else 205 env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN; 206 #endif 207 } 208 209 static void alpha_cpu_class_init(ObjectClass *oc, void *data) 210 { 211 DeviceClass *dc = DEVICE_CLASS(oc); 212 CPUClass *cc = CPU_CLASS(oc); 213 AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc); 214 215 device_class_set_parent_realize(dc, alpha_cpu_realizefn, 216 &acc->parent_realize); 217 218 cc->class_by_name = alpha_cpu_class_by_name; 219 cc->has_work = alpha_cpu_has_work; 220 cc->tcg_ops.do_interrupt = alpha_cpu_do_interrupt; 221 cc->tcg_ops.cpu_exec_interrupt = alpha_cpu_exec_interrupt; 222 cc->dump_state = alpha_cpu_dump_state; 223 cc->set_pc = alpha_cpu_set_pc; 224 cc->gdb_read_register = alpha_cpu_gdb_read_register; 225 cc->gdb_write_register = alpha_cpu_gdb_write_register; 226 cc->tcg_ops.tlb_fill = alpha_cpu_tlb_fill; 227 #ifndef CONFIG_USER_ONLY 228 cc->tcg_ops.do_transaction_failed = alpha_cpu_do_transaction_failed; 229 cc->do_unaligned_access = alpha_cpu_do_unaligned_access; 230 cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug; 231 dc->vmsd = &vmstate_alpha_cpu; 232 #endif 233 cc->disas_set_info = alpha_cpu_disas_set_info; 234 cc->tcg_ops.initialize = alpha_translate_init; 235 236 cc->gdb_num_core_regs = 67; 237 } 238 239 #define DEFINE_ALPHA_CPU_TYPE(base_type, cpu_model, initfn) \ 240 { \ 241 .parent = base_type, \ 242 .instance_init = initfn, \ 243 .name = ALPHA_CPU_TYPE_NAME(cpu_model), \ 244 } 245 246 static const TypeInfo alpha_cpu_type_infos[] = { 247 { 248 .name = TYPE_ALPHA_CPU, 249 .parent = TYPE_CPU, 250 .instance_size = sizeof(AlphaCPU), 251 .instance_init = alpha_cpu_initfn, 252 .abstract = true, 253 .class_size = sizeof(AlphaCPUClass), 254 .class_init = alpha_cpu_class_init, 255 }, 256 DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev4", ev4_cpu_initfn), 257 DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev5", ev5_cpu_initfn), 258 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev5"), "ev56", ev56_cpu_initfn), 259 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev56"), "pca56", 260 pca56_cpu_initfn), 261 DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev6", ev6_cpu_initfn), 262 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev6"), "ev67", ev67_cpu_initfn), 263 DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev67"), "ev68", NULL), 264 }; 265 266 DEFINE_TYPES(alpha_cpu_type_infos) 267