target-unicore32/cpu.c

   1 /*
   2  * QEMU UniCore32 CPU
   3  *
   4  * Copyright (c) 2010-2012 Guan Xuetao
   5  * Copyright (c) 2012 SUSE LINUX Products GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Contributions from 2012-04-01 on are considered under GPL version 2,
  12  * or (at your option) any later version.
  13  */
  14
  15 #include "cpu.h"
  16 #include "qemu-common.h"
  17 #include "migration/vmstate.h"
  18
  19 static inline void set_feature(CPUUniCore32State *env, int feature)
  20 {
  21     env->features |= feature;
  22 }
  23
  24 /* CPU models */
  25
  26 static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  27 {
  28     ObjectClass *oc;
  29     char *typename;
  30
  31     if (cpu_model == NULL) {
  32         return NULL;
  33     }
  34
  35     typename = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, cpu_model);
  36     oc = object_class_by_name(typename);
  37     g_free(typename);
  38     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  39                        object_class_is_abstract(oc))) {
  40         oc = NULL;
  41     }
  42     return oc;
  43 }
  44
  45 typedef struct UniCore32CPUInfo {
  46     const char *name;
  47     void (*instance_init)(Object *obj);
  48 } UniCore32CPUInfo;
  49
  50 static void unicore_ii_cpu_initfn(Object *obj)
  51 {
  52     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  53     CPUUniCore32State *env = &cpu->env;
  54
  55     env->cp0.c0_cpuid = 0x4d000863;
  56     env->cp0.c0_cachetype = 0x0d152152;
  57     env->cp0.c1_sys = 0x2000;
  58     env->cp0.c2_base = 0x0;
  59     env->cp0.c3_faultstatus = 0x0;
  60     env->cp0.c4_faultaddr = 0x0;
  61     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  62
  63     set_feature(env, UC32_HWCAP_CMOV);
  64     set_feature(env, UC32_HWCAP_UCF64);
  65 }
  66
  67 static void uc32_any_cpu_initfn(Object *obj)
  68 {
  69     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  70     CPUUniCore32State *env = &cpu->env;
  71
  72     env->cp0.c0_cpuid = 0xffffffff;
  73     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  74
  75     set_feature(env, UC32_HWCAP_CMOV);
  76     set_feature(env, UC32_HWCAP_UCF64);
  77 }
  78
  79 static const UniCore32CPUInfo uc32_cpus[] = {
  80     { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
  81     { .name = "any",        .instance_init = uc32_any_cpu_initfn },
  82 };
  83
  84 static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  85 {
  86     UniCore32CPU *cpu = UNICORE32_CPU(dev);
  87     UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
  88
  89     qemu_init_vcpu(&cpu->env);
  90
  91     ucc->parent_realize(dev, errp);
  92 }
  93
  94 static void uc32_cpu_initfn(Object *obj)
  95 {
  96     CPUState *cs = CPU(obj);
  97     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  98     CPUUniCore32State *env = &cpu->env;
  99     static bool inited;
 100
 101     cs->env_ptr = env;
 102     cpu_exec_init(env);
 103
 104 #ifdef CONFIG_USER_ONLY
 105     env->uncached_asr = ASR_MODE_USER;
 106     env->regs[31] = 0;
 107 #else
 108     env->uncached_asr = ASR_MODE_PRIV;
 109     env->regs[31] = 0x03000000;
 110 #endif
 111
 112     tlb_flush(env, 1);
 113
 114     if (tcg_enabled() && !inited) {
 115         inited = true;
 116         uc32_translate_init();
 117     }
 118 }
 119
 120 static const VMStateDescription vmstate_uc32_cpu = {
 121     .name = "cpu",
 122     .unmigratable = 1,
 123 };
 124
 125 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 126 {
 127     DeviceClass *dc = DEVICE_CLASS(oc);
 128     CPUClass *cc = CPU_CLASS(oc);
 129     UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 130
 131     ucc->parent_realize = dc->realize;
 132     dc->realize = uc32_cpu_realizefn;
 133
 134     cc->class_by_name = uc32_cpu_class_by_name;
 135     dc->vmsd = &vmstate_uc32_cpu;
 136 }
 137
 138 static void uc32_register_cpu_type(const UniCore32CPUInfo *info)
 139 {
 140     TypeInfo type_info = {
 141         .parent = TYPE_UNICORE32_CPU,
 142         .instance_init = info->instance_init,
 143     };
 144
 145     type_info.name = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, info->name);
 146     type_register(&type_info);
 147     g_free((void *)type_info.name);
 148 }
 149
 150 static const TypeInfo uc32_cpu_type_info = {
 151     .name = TYPE_UNICORE32_CPU,
 152     .parent = TYPE_CPU,
 153     .instance_size = sizeof(UniCore32CPU),
 154     .instance_init = uc32_cpu_initfn,
 155     .abstract = true,
 156     .class_size = sizeof(UniCore32CPUClass),
 157     .class_init = uc32_cpu_class_init,
 158 };
 159
 160 static void uc32_cpu_register_types(void)
 161 {
 162     int i;
 163
 164     type_register_static(&uc32_cpu_type_info);
 165     for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
 166         uc32_register_cpu_type(&uc32_cpus[i]);
 167     }
 168 }
 169
 170 type_init(uc32_cpu_register_types)