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
  21 static 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
  28 static bool uc32_cpu_has_work(CPUState *cs)
  29 {
  30     return cs->interrupt_request &
  31         (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
  32 }
  33
  34 static inline void set_feature(CPUUniCore32State *env, int feature)
  35 {
  36     env->features |= feature;
  37 }
  38
  39 /* CPU models */
  40
  41 static 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
  56 static 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
  73 static 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
  85 static 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
 102 static 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
 118 static const VMStateDescription vmstate_uc32_cpu = {
 119     .name = "cpu",
 120     .unmigratable = 1,
 121 };
 122
 123 static 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
 151 static 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
 165 DEFINE_TYPES(uc32_cpu_type_infos)