LXR qemu/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
  18static inline void set_feature(CPUUniCore32State *env, int feature)
  19{
  20    env->features |= feature;
  21}
  22
  23/* CPU models */
  24
  25typedef struct UniCore32CPUInfo {
  26    const char *name;
  27    void (*instance_init)(Object *obj);
  28} UniCore32CPUInfo;
  29
  30static 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
  47static 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
  59static 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
  64static 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
  83static 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
  94static 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
 103static 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
 113type_init(uc32_cpu_register_types)
 114