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
  30     if (cpu_model == NULL) {
  31         return NULL;
  32     }
  33
  34     oc = object_class_by_name(cpu_model);
  35     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  36                        object_class_is_abstract(oc))) {
  37         oc = NULL;
  38     }
  39     return oc;
  40 }
  41
  42 typedef struct UniCore32CPUInfo {
  43     const char *name;
  44     void (*instance_init)(Object *obj);
  45 } UniCore32CPUInfo;
  46
  47 static void unicore_ii_cpu_initfn(Object *obj)
  48 {
  49     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  50     CPUUniCore32State *env = &cpu->env;
  51
  52     env->cp0.c0_cpuid = 0x4d000863;
  53     env->cp0.c0_cachetype = 0x0d152152;
  54     env->cp0.c1_sys = 0x2000;
  55     env->cp0.c2_base = 0x0;
  56     env->cp0.c3_faultstatus = 0x0;
  57     env->cp0.c4_faultaddr = 0x0;
  58     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  59
  60     set_feature(env, UC32_HWCAP_CMOV);
  61     set_feature(env, UC32_HWCAP_UCF64);
  62 }
  63
  64 static void uc32_any_cpu_initfn(Object *obj)
  65 {
  66     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  67     CPUUniCore32State *env = &cpu->env;
  68
  69     env->cp0.c0_cpuid = 0xffffffff;
  70     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  71
  72     set_feature(env, UC32_HWCAP_CMOV);
  73     set_feature(env, UC32_HWCAP_UCF64);
  74 }
  75
  76 static const UniCore32CPUInfo uc32_cpus[] = {
  77     { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
  78     { .name = "any",        .instance_init = uc32_any_cpu_initfn },
  79 };
  80
  81 static void uc32_cpu_initfn(Object *obj)
  82 {
  83     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  84     CPUUniCore32State *env = &cpu->env;
  85
  86     cpu_exec_init(env);
  87     env->cpu_model_str = object_get_typename(obj);
  88
  89 #ifdef CONFIG_USER_ONLY
  90     env->uncached_asr = ASR_MODE_USER;
  91     env->regs[31] = 0;
  92 #else
  93     env->uncached_asr = ASR_MODE_PRIV;
  94     env->regs[31] = 0x03000000;
  95 #endif
  96
  97     tlb_flush(env, 1);
  98 }
  99
 100 static const VMStateDescription vmstate_uc32_cpu = {
 101     .name = "cpu",
 102     .unmigratable = 1,
 103 };
 104
 105 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 106 {
 107     DeviceClass *dc = DEVICE_CLASS(oc);
 108     CPUClass *cc = CPU_CLASS(oc);
 109
 110     cc->class_by_name = uc32_cpu_class_by_name;
 111     dc->vmsd = &vmstate_uc32_cpu;
 112 }
 113
 114 static void uc32_register_cpu_type(const UniCore32CPUInfo *info)
 115 {
 116     TypeInfo type_info = {
 117         .name = info->name,
 118         .parent = TYPE_UNICORE32_CPU,
 119         .instance_init = info->instance_init,
 120     };
 121
 122     type_register(&type_info);
 123 }
 124
 125 static const TypeInfo uc32_cpu_type_info = {
 126     .name = TYPE_UNICORE32_CPU,
 127     .parent = TYPE_CPU,
 128     .instance_size = sizeof(UniCore32CPU),
 129     .instance_init = uc32_cpu_initfn,
 130     .abstract = true,
 131     .class_size = sizeof(UniCore32CPUClass),
 132     .class_init = uc32_cpu_class_init,
 133 };
 134
 135 static void uc32_cpu_register_types(void)
 136 {
 137     int i;
 138
 139     type_register_static(&uc32_cpu_type_info);
 140     for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
 141         uc32_register_cpu_type(&uc32_cpus[i]);
 142     }
 143 }
 144
 145 type_init(uc32_cpu_register_types)