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 "qemu-common.h"
  19 #include "migration/vmstate.h"
  20 #include "exec/exec-all.h"
  21
  22 static 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
  29 static bool uc32_cpu_has_work(CPUState *cs)
  30 {
  31     return cs->interrupt_request &
  32         (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
  33 }
  34
  35 static inline void set_feature(CPUUniCore32State *env, int feature)
  36 {
  37     env->features |= feature;
  38 }
  39
  40 /* CPU models */
  41
  42 static 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
  57 static 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     set_snan_bit_is_one(1, &env->ucf64.fp_status);
  73 }
  74
  75 static void uc32_any_cpu_initfn(Object *obj)
  76 {
  77     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  78     CPUUniCore32State *env = &cpu->env;
  79
  80     env->cp0.c0_cpuid = 0xffffffff;
  81     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  82
  83     set_feature(env, UC32_HWCAP_CMOV);
  84     set_feature(env, UC32_HWCAP_UCF64);
  85     set_snan_bit_is_one(1, &env->ucf64.fp_status);
  86 }
  87
  88 static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  89 {
  90     CPUState *cs = CPU(dev);
  91     UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
  92     Error *local_err = NULL;
  93
  94     cpu_exec_realizefn(cs, &local_err);
  95     if (local_err != NULL) {
  96         error_propagate(errp, local_err);
  97         return;
  98     }
  99
 100     qemu_init_vcpu(cs);
 101
 102     ucc->parent_realize(dev, errp);
 103 }
 104
 105 static void uc32_cpu_initfn(Object *obj)
 106 {
 107     CPUState *cs = CPU(obj);
 108     UniCore32CPU *cpu = UNICORE32_CPU(obj);
 109     CPUUniCore32State *env = &cpu->env;
 110
 111     cs->env_ptr = env;
 112
 113 #ifdef CONFIG_USER_ONLY
 114     env->uncached_asr = ASR_MODE_USER;
 115     env->regs[31] = 0;
 116 #else
 117     env->uncached_asr = ASR_MODE_PRIV;
 118     env->regs[31] = 0x03000000;
 119 #endif
 120
 121     tlb_flush(cs);
 122 }
 123
 124 static const VMStateDescription vmstate_uc32_cpu = {
 125     .name = "cpu",
 126     .unmigratable = 1,
 127 };
 128
 129 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 130 {
 131     DeviceClass *dc = DEVICE_CLASS(oc);
 132     CPUClass *cc = CPU_CLASS(oc);
 133     UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 134
 135     ucc->parent_realize = dc->realize;
 136     dc->realize = uc32_cpu_realizefn;
 137
 138     cc->class_by_name = uc32_cpu_class_by_name;
 139     cc->has_work = uc32_cpu_has_work;
 140     cc->do_interrupt = uc32_cpu_do_interrupt;
 141     cc->cpu_exec_interrupt = uc32_cpu_exec_interrupt;
 142     cc->dump_state = uc32_cpu_dump_state;
 143     cc->set_pc = uc32_cpu_set_pc;
 144 #ifdef CONFIG_USER_ONLY
 145     cc->handle_mmu_fault = uc32_cpu_handle_mmu_fault;
 146 #else
 147     cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
 148 #endif
 149     cc->tcg_initialize = uc32_translate_init;
 150     dc->vmsd = &vmstate_uc32_cpu;
 151 }
 152
 153 #define DEFINE_UNICORE32_CPU_TYPE(cpu_model, initfn) \
 154     {                                                \
 155         .parent = TYPE_UNICORE32_CPU,                \
 156         .instance_init = initfn,                     \
 157         .name = UNICORE32_CPU_TYPE_NAME(cpu_model),  \
 158     }
 159
 160 static const TypeInfo uc32_cpu_type_infos[] = {
 161     {
 162         .name = TYPE_UNICORE32_CPU,
 163         .parent = TYPE_CPU,
 164         .instance_size = sizeof(UniCore32CPU),
 165         .instance_init = uc32_cpu_initfn,
 166         .abstract = true,
 167         .class_size = sizeof(UniCore32CPUClass),
 168         .class_init = uc32_cpu_class_init,
 169     },
 170     DEFINE_UNICORE32_CPU_TYPE("UniCore-II", unicore_ii_cpu_initfn),
 171     DEFINE_UNICORE32_CPU_TYPE("any", uc32_any_cpu_initfn),
 172 };
 173
 174 DEFINE_TYPES(uc32_cpu_type_infos)