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
  18 static inline void set_feature(CPUUniCore32State *env, int feature)
  19 {
  20     env->features |= feature;
  21 }
  22
  23 /* CPU models */
  24
  25 static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  26 {
  27     ObjectClass *oc;
  28
  29     if (cpu_model == NULL) {
  30         return NULL;
  31     }
  32
  33     oc = object_class_by_name(cpu_model);
  34     if (oc != NULL && !object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU)) {
  35         oc = NULL;
  36     }
  37     return oc;
  38 }
  39
  40 typedef struct UniCore32CPUInfo {
  41     const char *name;
  42     void (*instance_init)(Object *obj);
  43 } UniCore32CPUInfo;
  44
  45 static void unicore_ii_cpu_initfn(Object *obj)
  46 {
  47     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  48     CPUUniCore32State *env = &cpu->env;
  49
  50     env->cp0.c0_cpuid = 0x4d000863;
  51     env->cp0.c0_cachetype = 0x0d152152;
  52     env->cp0.c1_sys = 0x2000;
  53     env->cp0.c2_base = 0x0;
  54     env->cp0.c3_faultstatus = 0x0;
  55     env->cp0.c4_faultaddr = 0x0;
  56     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  57
  58     set_feature(env, UC32_HWCAP_CMOV);
  59     set_feature(env, UC32_HWCAP_UCF64);
  60 }
  61
  62 static void uc32_any_cpu_initfn(Object *obj)
  63 {
  64     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  65     CPUUniCore32State *env = &cpu->env;
  66
  67     env->cp0.c0_cpuid = 0xffffffff;
  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 const UniCore32CPUInfo uc32_cpus[] = {
  75     { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
  76     { .name = "any",        .instance_init = uc32_any_cpu_initfn },
  77 };
  78
  79 static void uc32_cpu_initfn(Object *obj)
  80 {
  81     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  82     CPUUniCore32State *env = &cpu->env;
  83
  84     cpu_exec_init(env);
  85     env->cpu_model_str = object_get_typename(obj);
  86
  87 #ifdef CONFIG_USER_ONLY
  88     env->uncached_asr = ASR_MODE_USER;
  89     env->regs[31] = 0;
  90 #else
  91     env->uncached_asr = ASR_MODE_PRIV;
  92     env->regs[31] = 0x03000000;
  93 #endif
  94
  95     tlb_flush(env, 1);
  96 }
  97
  98 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
  99 {
 100     CPUClass *cc = CPU_CLASS(oc);
 101
 102     cc->class_by_name = uc32_cpu_class_by_name;
 103 }
 104
 105 static void uc32_register_cpu_type(const UniCore32CPUInfo *info)
 106 {
 107     TypeInfo type_info = {
 108         .name = info->name,
 109         .parent = TYPE_UNICORE32_CPU,
 110         .instance_init = info->instance_init,
 111     };
 112
 113     type_register_static(&type_info);
 114 }
 115
 116 static const TypeInfo uc32_cpu_type_info = {
 117     .name = TYPE_UNICORE32_CPU,
 118     .parent = TYPE_CPU,
 119     .instance_size = sizeof(UniCore32CPU),
 120     .instance_init = uc32_cpu_initfn,
 121     .abstract = true,
 122     .class_size = sizeof(UniCore32CPUClass),
 123     .class_init = uc32_cpu_class_init,
 124 };
 125
 126 static void uc32_cpu_register_types(void)
 127 {
 128     int i;
 129
 130     type_register_static(&uc32_cpu_type_info);
 131     for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
 132         uc32_register_cpu_type(&uc32_cpus[i]);
 133     }
 134 }
 135
 136 type_init(uc32_cpu_register_types)