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
  21static void uc32_cpu_set_pc(CPUState *cs, vaddr value)
  22{
  23    UniCore32CPU *cpu = UNICORE32_CPU(cs);
  24
  25    cpu->env.regs[31] = value;
  26}
  27
  28static bool uc32_cpu_has_work(CPUState *cs)
  29{
  30    return cs->interrupt_request &
  31        (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
  32}
  33
  34static inline void set_feature(CPUUniCore32State *env, int feature)
  35{
  36    env->features |= feature;
  37}
  38
  39/* CPU models */
  40
  41static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  42{
  43    ObjectClass *oc;
  44    char *typename;
  45
  46    typename = g_strdup_printf(UNICORE32_CPU_TYPE_NAME("%s"), cpu_model);
  47    oc = object_class_by_name(typename);
  48    g_free(typename);
  49    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  50                       object_class_is_abstract(oc))) {
  51        oc = NULL;
  52    }
  53    return oc;
  54}
  55
  56static void unicore_ii_cpu_initfn(Object *obj)
  57{
  58    UniCore32CPU *cpu = UNICORE32_CPU(obj);
  59    CPUUniCore32State *env = &cpu->env;
  60
  61    env->cp0.c0_cpuid = 0x4d000863;
  62    env->cp0.c0_cachetype = 0x0d152152;
  63    env->cp0.c1_sys = 0x2000;
  64    env->cp0.c2_base = 0x0;
  65    env->cp0.c3_faultstatus = 0x0;
  66    env->cp0.c4_faultaddr = 0x0;
  67    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  68
  69    set_feature(env, UC32_HWCAP_CMOV);
  70    set_feature(env, UC32_HWCAP_UCF64);
  71}
  72
  73static void uc32_any_cpu_initfn(Object *obj)
  74{
  75    UniCore32CPU *cpu = UNICORE32_CPU(obj);
  76    CPUUniCore32State *env = &cpu->env;
  77
  78    env->cp0.c0_cpuid = 0xffffffff;
  79    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  80
  81    set_feature(env, UC32_HWCAP_CMOV);
  82    set_feature(env, UC32_HWCAP_UCF64);
  83}
  84
  85static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  86{
  87    CPUState *cs = CPU(dev);
  88    UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
  89    Error *local_err = NULL;
  90
  91    cpu_exec_realizefn(cs, &local_err);
  92    if (local_err != NULL) {
  93        error_propagate(errp, local_err);
  94        return;
  95    }
  96
  97    qemu_init_vcpu(cs);
  98
  99    ucc->parent_realize(dev, errp);
 100}
 101
 102static void uc32_cpu_initfn(Object *obj)
 103{
 104    UniCore32CPU *cpu = UNICORE32_CPU(obj);
 105    CPUUniCore32State *env = &cpu->env;
 106
 107    cpu_set_cpustate_pointers(cpu);
 108
 109#ifdef CONFIG_USER_ONLY
 110    env->uncached_asr = ASR_MODE_USER;
 111    env->regs[31] = 0;
 112#else
 113    env->uncached_asr = ASR_MODE_PRIV;
 114    env->regs[31] = 0x03000000;
 115#endif
 116}
 117
 118static const VMStateDescription vmstate_uc32_cpu = {
 119    .name = "cpu",
 120    .unmigratable = 1,
 121};
 122
 123static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 124{
 125    DeviceClass *dc = DEVICE_CLASS(oc);
 126    CPUClass *cc = CPU_CLASS(oc);
 127    UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 128
 129    device_class_set_parent_realize(dc, uc32_cpu_realizefn,
 130                                    &ucc->parent_realize);
 131
 132    cc->class_by_name = uc32_cpu_class_by_name;
 133    cc->has_work = uc32_cpu_has_work;
 134    cc->do_interrupt = uc32_cpu_do_interrupt;
 135    cc->cpu_exec_interrupt = uc32_cpu_exec_interrupt;
 136    cc->dump_state = uc32_cpu_dump_state;
 137    cc->set_pc = uc32_cpu_set_pc;
 138    cc->tlb_fill = uc32_cpu_tlb_fill;
 139    cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
 140    cc->tcg_initialize = uc32_translate_init;
 141    dc->vmsd = &vmstate_uc32_cpu;
 142}
 143
 144#define DEFINE_UNICORE32_CPU_TYPE(cpu_model, initfn) \
 145    {                                                \
 146        .parent = TYPE_UNICORE32_CPU,                \
 147        .instance_init = initfn,                     \
 148        .name = UNICORE32_CPU_TYPE_NAME(cpu_model),  \
 149    }
 150
 151static const TypeInfo uc32_cpu_type_infos[] = {
 152    {
 153        .name = TYPE_UNICORE32_CPU,
 154        .parent = TYPE_CPU,
 155        .instance_size = sizeof(UniCore32CPU),
 156        .instance_init = uc32_cpu_initfn,
 157        .abstract = true,
 158        .class_size = sizeof(UniCore32CPUClass),
 159        .class_init = uc32_cpu_class_init,
 160    },
 161    DEFINE_UNICORE32_CPU_TYPE("UniCore-II", unicore_ii_cpu_initfn),
 162    DEFINE_UNICORE32_CPU_TYPE("any", uc32_any_cpu_initfn),
 163};
 164
 165DEFINE_TYPES(uc32_cpu_type_infos)
 166