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-qom.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 typedef struct UniCore32CPUInfo {
  26     const char *name;
  27     void (*instance_init)(Object *obj);
  28 } UniCore32CPUInfo;
  29
  30 static void unicore_ii_cpu_initfn(Object *obj)
  31 {
  32     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  33     CPUUniCore32State *env = &cpu->env;
  34
  35     env->cp0.c0_cpuid = 0x4d000863;
  36     env->cp0.c0_cachetype = 0x0d152152;
  37     env->cp0.c1_sys = 0x2000;
  38     env->cp0.c2_base = 0x0;
  39     env->cp0.c3_faultstatus = 0x0;
  40     env->cp0.c4_faultaddr = 0x0;
  41     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  42
  43     set_feature(env, UC32_HWCAP_CMOV);
  44     set_feature(env, UC32_HWCAP_UCF64);
  45 }
  46
  47 static void uc32_any_cpu_initfn(Object *obj)
  48 {
  49     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  50     CPUUniCore32State *env = &cpu->env;
  51
  52     env->cp0.c0_cpuid = 0xffffffff;
  53     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  54
  55     set_feature(env, UC32_HWCAP_CMOV);
  56     set_feature(env, UC32_HWCAP_UCF64);
  57 }
  58
  59 static const UniCore32CPUInfo uc32_cpus[] = {
  60     { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
  61     { .name = "any",        .instance_init = uc32_any_cpu_initfn },
  62 };
  63
  64 static void uc32_cpu_initfn(Object *obj)
  65 {
  66     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  67     CPUUniCore32State *env = &cpu->env;
  68
  69     cpu_exec_init(env);
  70     env->cpu_model_str = object_get_typename(obj);
  71
  72 #ifdef CONFIG_USER_ONLY
  73     env->uncached_asr = ASR_MODE_USER;
  74     env->regs[31] = 0;
  75 #else
  76     env->uncached_asr = ASR_MODE_PRIV;
  77     env->regs[31] = 0x03000000;
  78 #endif
  79
  80     tlb_flush(env, 1);
  81 }
  82
  83 static void uc32_register_cpu_type(const UniCore32CPUInfo *info)
  84 {
  85     TypeInfo type_info = {
  86         .name = info->name,
  87         .parent = TYPE_UNICORE32_CPU,
  88         .instance_init = info->instance_init,
  89     };
  90
  91     type_register_static(&type_info);
  92 }
  93
  94 static const TypeInfo uc32_cpu_type_info = {
  95     .name = TYPE_UNICORE32_CPU,
  96     .parent = TYPE_CPU,
  97     .instance_size = sizeof(UniCore32CPU),
  98     .instance_init = uc32_cpu_initfn,
  99     .abstract = true,
 100     .class_size = sizeof(UniCore32CPUClass),
 101 };
 102
 103 static void uc32_cpu_register_types(void)
 104 {
 105     int i;
 106
 107     type_register_static(&uc32_cpu_type_info);
 108     for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
 109         uc32_register_cpu_type(&uc32_cpus[i]);
 110     }
 111 }
 112
 113 type_init(uc32_cpu_register_types)