qemu/target-unicore32/cpu.c
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   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
  19static 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
  26static bool uc32_cpu_has_work(CPUState *cs)
  27{
  28    return cs->interrupt_request &
  29        (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
  30}
  31
  32static inline void set_feature(CPUUniCore32State *env, int feature)
  33{
  34    env->features |= feature;
  35}
  36
  37/* CPU models */
  38
  39static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  40{
  41    ObjectClass *oc;
  42    char *typename;
  43
  44    if (cpu_model == NULL) {
  45        return NULL;
  46    }
  47
  48    typename = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, cpu_model);
  49    oc = object_class_by_name(typename);
  50    g_free(typename);
  51    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  52                       object_class_is_abstract(oc))) {
  53        oc = NULL;
  54    }
  55    return oc;
  56}
  57
  58typedef struct UniCore32CPUInfo {
  59    const char *name;
  60    void (*instance_init)(Object *obj);
  61} UniCore32CPUInfo;
  62
  63static void unicore_ii_cpu_initfn(Object *obj)
  64{
  65    UniCore32CPU *cpu = UNICORE32_CPU(obj);
  66    CPUUniCore32State *env = &cpu->env;
  67
  68    env->cp0.c0_cpuid = 0x4d000863;
  69    env->cp0.c0_cachetype = 0x0d152152;
  70    env->cp0.c1_sys = 0x2000;
  71    env->cp0.c2_base = 0x0;
  72    env->cp0.c3_faultstatus = 0x0;
  73    env->cp0.c4_faultaddr = 0x0;
  74    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  75
  76    set_feature(env, UC32_HWCAP_CMOV);
  77    set_feature(env, UC32_HWCAP_UCF64);
  78}
  79
  80static void uc32_any_cpu_initfn(Object *obj)
  81{
  82    UniCore32CPU *cpu = UNICORE32_CPU(obj);
  83    CPUUniCore32State *env = &cpu->env;
  84
  85    env->cp0.c0_cpuid = 0xffffffff;
  86    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  87
  88    set_feature(env, UC32_HWCAP_CMOV);
  89    set_feature(env, UC32_HWCAP_UCF64);
  90}
  91
  92static const UniCore32CPUInfo uc32_cpus[] = {
  93    { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
  94    { .name = "any",        .instance_init = uc32_any_cpu_initfn },
  95};
  96
  97static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  98{
  99    UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
 100
 101    qemu_init_vcpu(CPU(dev));
 102
 103    ucc->parent_realize(dev, errp);
 104}
 105
 106static void uc32_cpu_initfn(Object *obj)
 107{
 108    CPUState *cs = CPU(obj);
 109    UniCore32CPU *cpu = UNICORE32_CPU(obj);
 110    CPUUniCore32State *env = &cpu->env;
 111    static bool inited;
 112
 113    cs->env_ptr = env;
 114    cpu_exec_init(env);
 115
 116#ifdef CONFIG_USER_ONLY
 117    env->uncached_asr = ASR_MODE_USER;
 118    env->regs[31] = 0;
 119#else
 120    env->uncached_asr = ASR_MODE_PRIV;
 121    env->regs[31] = 0x03000000;
 122#endif
 123
 124    tlb_flush(cs, 1);
 125
 126    if (tcg_enabled() && !inited) {
 127        inited = true;
 128        uc32_translate_init();
 129    }
 130}
 131
 132static const VMStateDescription vmstate_uc32_cpu = {
 133    .name = "cpu",
 134    .unmigratable = 1,
 135};
 136
 137static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 138{
 139    DeviceClass *dc = DEVICE_CLASS(oc);
 140    CPUClass *cc = CPU_CLASS(oc);
 141    UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 142
 143    ucc->parent_realize = dc->realize;
 144    dc->realize = uc32_cpu_realizefn;
 145
 146    cc->class_by_name = uc32_cpu_class_by_name;
 147    cc->has_work = uc32_cpu_has_work;
 148    cc->do_interrupt = uc32_cpu_do_interrupt;
 149    cc->cpu_exec_interrupt = uc32_cpu_exec_interrupt;
 150    cc->dump_state = uc32_cpu_dump_state;
 151    cc->set_pc = uc32_cpu_set_pc;
 152#ifdef CONFIG_USER_ONLY
 153    cc->handle_mmu_fault = uc32_cpu_handle_mmu_fault;
 154#else
 155    cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
 156#endif
 157    dc->vmsd = &vmstate_uc32_cpu;
 158}
 159
 160static void uc32_register_cpu_type(const UniCore32CPUInfo *info)
 161{
 162    TypeInfo type_info = {
 163        .parent = TYPE_UNICORE32_CPU,
 164        .instance_init = info->instance_init,
 165    };
 166
 167    type_info.name = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, info->name);
 168    type_register(&type_info);
 169    g_free((void *)type_info.name);
 170}
 171
 172static const TypeInfo uc32_cpu_type_info = {
 173    .name = TYPE_UNICORE32_CPU,
 174    .parent = TYPE_CPU,
 175    .instance_size = sizeof(UniCore32CPU),
 176    .instance_init = uc32_cpu_initfn,
 177    .abstract = true,
 178    .class_size = sizeof(UniCore32CPUClass),
 179    .class_init = uc32_cpu_class_init,
 180};
 181
 182static void uc32_cpu_register_types(void)
 183{
 184    int i;
 185
 186    type_register_static(&uc32_cpu_type_info);
 187    for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
 188        uc32_register_cpu_type(&uc32_cpus[i]);
 189    }
 190}
 191
 192type_init(uc32_cpu_register_types)
 193