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 "qemu/osdep.h"
  16#include "qapi/error.h"
  17#include "cpu.h"
  18#include "migration/vmstate.h"
  19#include "exec/exec-all.h"
  20#include "fpu/softfloat.h"
  21
  22static void uc32_cpu_set_pc(CPUState *cs, vaddr value)
  23{
  24    UniCore32CPU *cpu = UNICORE32_CPU(cs);
  25
  26    cpu->env.regs[31] = value;
  27}
  28
  29static bool uc32_cpu_has_work(CPUState *cs)
  30{
  31    return cs->interrupt_request &
  32        (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
  33}
  34
  35static inline void set_feature(CPUUniCore32State *env, int feature)
  36{
  37    env->features |= feature;
  38}
  39
  40/* CPU models */
  41
  42static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  43{
  44    ObjectClass *oc;
  45    char *typename;
  46
  47    typename = g_strdup_printf(UNICORE32_CPU_TYPE_NAME("%s"), cpu_model);
  48    oc = object_class_by_name(typename);
  49    g_free(typename);
  50    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  51                       object_class_is_abstract(oc))) {
  52        oc = NULL;
  53    }
  54    return oc;
  55}
  56
  57static void unicore_ii_cpu_initfn(Object *obj)
  58{
  59    UniCore32CPU *cpu = UNICORE32_CPU(obj);
  60    CPUUniCore32State *env = &cpu->env;
  61
  62    env->cp0.c0_cpuid = 0x4d000863;
  63    env->cp0.c0_cachetype = 0x0d152152;
  64    env->cp0.c1_sys = 0x2000;
  65    env->cp0.c2_base = 0x0;
  66    env->cp0.c3_faultstatus = 0x0;
  67    env->cp0.c4_faultaddr = 0x0;
  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
  74static void uc32_any_cpu_initfn(Object *obj)
  75{
  76    UniCore32CPU *cpu = UNICORE32_CPU(obj);
  77    CPUUniCore32State *env = &cpu->env;
  78
  79    env->cp0.c0_cpuid = 0xffffffff;
  80    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  81
  82    set_feature(env, UC32_HWCAP_CMOV);
  83    set_feature(env, UC32_HWCAP_UCF64);
  84}
  85
  86static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  87{
  88    CPUState *cs = CPU(dev);
  89    UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
  90    Error *local_err = NULL;
  91
  92    cpu_exec_realizefn(cs, &local_err);
  93    if (local_err != NULL) {
  94        error_propagate(errp, local_err);
  95        return;
  96    }
  97
  98    qemu_init_vcpu(cs);
  99
 100    ucc->parent_realize(dev, errp);
 101}
 102
 103static void uc32_cpu_initfn(Object *obj)
 104{
 105    UniCore32CPU *cpu = UNICORE32_CPU(obj);
 106    CPUUniCore32State *env = &cpu->env;
 107
 108    cpu_set_cpustate_pointers(cpu);
 109
 110#ifdef CONFIG_USER_ONLY
 111    env->uncached_asr = ASR_MODE_USER;
 112    env->regs[31] = 0;
 113#else
 114    env->uncached_asr = ASR_MODE_PRIV;
 115    env->regs[31] = 0x03000000;
 116#endif
 117}
 118
 119static const VMStateDescription vmstate_uc32_cpu = {
 120    .name = "cpu",
 121    .unmigratable = 1,
 122};
 123
 124static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 125{
 126    DeviceClass *dc = DEVICE_CLASS(oc);
 127    CPUClass *cc = CPU_CLASS(oc);
 128    UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 129
 130    device_class_set_parent_realize(dc, uc32_cpu_realizefn,
 131                                    &ucc->parent_realize);
 132
 133    cc->class_by_name = uc32_cpu_class_by_name;
 134    cc->has_work = uc32_cpu_has_work;
 135    cc->do_interrupt = uc32_cpu_do_interrupt;
 136    cc->cpu_exec_interrupt = uc32_cpu_exec_interrupt;
 137    cc->dump_state = uc32_cpu_dump_state;
 138    cc->set_pc = uc32_cpu_set_pc;
 139    cc->tlb_fill = uc32_cpu_tlb_fill;
 140    cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
 141    cc->tcg_initialize = uc32_translate_init;
 142    dc->vmsd = &vmstate_uc32_cpu;
 143}
 144
 145#define DEFINE_UNICORE32_CPU_TYPE(cpu_model, initfn) \
 146    {                                                \
 147        .parent = TYPE_UNICORE32_CPU,                \
 148        .instance_init = initfn,                     \
 149        .name = UNICORE32_CPU_TYPE_NAME(cpu_model),  \
 150    }
 151
 152static const TypeInfo uc32_cpu_type_infos[] = {
 153    {
 154        .name = TYPE_UNICORE32_CPU,
 155        .parent = TYPE_CPU,
 156        .instance_size = sizeof(UniCore32CPU),
 157        .instance_init = uc32_cpu_initfn,
 158        .abstract = true,
 159        .class_size = sizeof(UniCore32CPUClass),
 160        .class_init = uc32_cpu_class_init,
 161    },
 162    DEFINE_UNICORE32_CPU_TYPE("UniCore-II", unicore_ii_cpu_initfn),
 163    DEFINE_UNICORE32_CPU_TYPE("any", uc32_any_cpu_initfn),
 164};
 165
 166DEFINE_TYPES(uc32_cpu_type_infos)
 167