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 void uc32_cpu_set_pc(CPUState *cs, vaddr value)
  20 {
  21     UniCore32CPU *cpu = UNICORE32_CPU(cs);
  22
  23     cpu->env.regs[31] = value;
  24 }
  25
  26 static inline void set_feature(CPUUniCore32State *env, int feature)
  27 {
  28     env->features |= feature;
  29 }
  30
  31 /* CPU models */
  32
  33 static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  34 {
  35     ObjectClass *oc;
  36     char *typename;
  37
  38     if (cpu_model == NULL) {
  39         return NULL;
  40     }
  41
  42     typename = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, cpu_model);
  43     oc = object_class_by_name(typename);
  44     g_free(typename);
  45     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  46                        object_class_is_abstract(oc))) {
  47         oc = NULL;
  48     }
  49     return oc;
  50 }
  51
  52 typedef struct UniCore32CPUInfo {
  53     const char *name;
  54     void (*instance_init)(Object *obj);
  55 } UniCore32CPUInfo;
  56
  57 static void unicore_ii_cpu_initfn(Object *obj)
  58 {
  59     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  60     CPUUniCore32State *env = &cpu->env;
  61
  62     env->cp0.c0_cpuid = 0x4d000863;
  63     env->cp0.c0_cachetype = 0x0d152152;
  64     env->cp0.c1_sys = 0x2000;
  65     env->cp0.c2_base = 0x0;
  66     env->cp0.c3_faultstatus = 0x0;
  67     env->cp0.c4_faultaddr = 0x0;
  68     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  69
  70     set_feature(env, UC32_HWCAP_CMOV);
  71     set_feature(env, UC32_HWCAP_UCF64);
  72 }
  73
  74 static void uc32_any_cpu_initfn(Object *obj)
  75 {
  76     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  77     CPUUniCore32State *env = &cpu->env;
  78
  79     env->cp0.c0_cpuid = 0xffffffff;
  80     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  81
  82     set_feature(env, UC32_HWCAP_CMOV);
  83     set_feature(env, UC32_HWCAP_UCF64);
  84 }
  85
  86 static const UniCore32CPUInfo uc32_cpus[] = {
  87     { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
  88     { .name = "any",        .instance_init = uc32_any_cpu_initfn },
  89 };
  90
  91 static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  92 {
  93     UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
  94
  95     ucc->parent_realize(dev, errp);
  96 }
  97
  98 static void uc32_cpu_initfn(Object *obj)
  99 {
 100     CPUState *cs = CPU(obj);
 101     UniCore32CPU *cpu = UNICORE32_CPU(obj);
 102     CPUUniCore32State *env = &cpu->env;
 103     static bool inited;
 104
 105     cs->env_ptr = env;
 106     cpu_exec_init(env);
 107
 108 #ifdef CONFIG_USER_ONLY
 109     env->uncached_asr = ASR_MODE_USER;
 110     env->regs[31] = 0;
 111 #else
 112     env->uncached_asr = ASR_MODE_PRIV;
 113     env->regs[31] = 0x03000000;
 114 #endif
 115
 116     tlb_flush(env, 1);
 117
 118     if (tcg_enabled() && !inited) {
 119         inited = true;
 120         uc32_translate_init();
 121     }
 122 }
 123
 124 static const VMStateDescription vmstate_uc32_cpu = {
 125     .name = "cpu",
 126     .unmigratable = 1,
 127 };
 128
 129 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 130 {
 131     DeviceClass *dc = DEVICE_CLASS(oc);
 132     CPUClass *cc = CPU_CLASS(oc);
 133     UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 134
 135     ucc->parent_realize = dc->realize;
 136     dc->realize = uc32_cpu_realizefn;
 137
 138     cc->class_by_name = uc32_cpu_class_by_name;
 139     cc->do_interrupt = uc32_cpu_do_interrupt;
 140     cc->dump_state = uc32_cpu_dump_state;
 141     cc->set_pc = uc32_cpu_set_pc;
 142 #ifndef CONFIG_USER_ONLY
 143     cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
 144 #endif
 145     dc->vmsd = &vmstate_uc32_cpu;
 146 }
 147
 148 static void uc32_register_cpu_type(const UniCore32CPUInfo *info)
 149 {
 150     TypeInfo type_info = {
 151         .parent = TYPE_UNICORE32_CPU,
 152         .instance_init = info->instance_init,
 153     };
 154
 155     type_info.name = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, info->name);
 156     type_register(&type_info);
 157     g_free((void *)type_info.name);
 158 }
 159
 160 static const TypeInfo uc32_cpu_type_info = {
 161     .name = TYPE_UNICORE32_CPU,
 162     .parent = TYPE_CPU,
 163     .instance_size = sizeof(UniCore32CPU),
 164     .instance_init = uc32_cpu_initfn,
 165     .abstract = true,
 166     .class_size = sizeof(UniCore32CPUClass),
 167     .class_init = uc32_cpu_class_init,
 168 };
 169
 170 static void uc32_cpu_register_types(void)
 171 {
 172     int i;
 173
 174     type_register_static(&uc32_cpu_type_info);
 175     for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
 176         uc32_register_cpu_type(&uc32_cpus[i]);
 177     }
 178 }
 179
 180 type_init(uc32_cpu_register_types)