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