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 #include "fpu/softfloat.h"
  22
  23 static void uc32_cpu_set_pc(CPUState *cs, vaddr value)
  24 {
  25     UniCore32CPU *cpu = UNICORE32_CPU(cs);
  26
  27     cpu->env.regs[31] = value;
  28 }
  29
  30 static bool uc32_cpu_has_work(CPUState *cs)
  31 {
  32     return cs->interrupt_request &
  33         (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
  34 }
  35
  36 static inline void set_feature(CPUUniCore32State *env, int feature)
  37 {
  38     env->features |= feature;
  39 }
  40
  41 /* CPU models */
  42
  43 static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
  44 {
  45     ObjectClass *oc;
  46     char *typename;
  47
  48     typename = g_strdup_printf(UNICORE32_CPU_TYPE_NAME("%s"), cpu_model);
  49     oc = object_class_by_name(typename);
  50     g_free(typename);
  51     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
  52                        object_class_is_abstract(oc))) {
  53         oc = NULL;
  54     }
  55     return oc;
  56 }
  57
  58 static void unicore_ii_cpu_initfn(Object *obj)
  59 {
  60     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  61     CPUUniCore32State *env = &cpu->env;
  62
  63     env->cp0.c0_cpuid = 0x4d000863;
  64     env->cp0.c0_cachetype = 0x0d152152;
  65     env->cp0.c1_sys = 0x2000;
  66     env->cp0.c2_base = 0x0;
  67     env->cp0.c3_faultstatus = 0x0;
  68     env->cp0.c4_faultaddr = 0x0;
  69     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  70
  71     set_feature(env, UC32_HWCAP_CMOV);
  72     set_feature(env, UC32_HWCAP_UCF64);
  73     set_snan_bit_is_one(1, &env->ucf64.fp_status);
  74 }
  75
  76 static void uc32_any_cpu_initfn(Object *obj)
  77 {
  78     UniCore32CPU *cpu = UNICORE32_CPU(obj);
  79     CPUUniCore32State *env = &cpu->env;
  80
  81     env->cp0.c0_cpuid = 0xffffffff;
  82     env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
  83
  84     set_feature(env, UC32_HWCAP_CMOV);
  85     set_feature(env, UC32_HWCAP_UCF64);
  86     set_snan_bit_is_one(1, &env->ucf64.fp_status);
  87 }
  88
  89 static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
  90 {
  91     CPUState *cs = CPU(dev);
  92     UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
  93     Error *local_err = NULL;
  94
  95     cpu_exec_realizefn(cs, &local_err);
  96     if (local_err != NULL) {
  97         error_propagate(errp, local_err);
  98         return;
  99     }
 100
 101     qemu_init_vcpu(cs);
 102
 103     ucc->parent_realize(dev, errp);
 104 }
 105
 106 static void uc32_cpu_initfn(Object *obj)
 107 {
 108     CPUState *cs = CPU(obj);
 109     UniCore32CPU *cpu = UNICORE32_CPU(obj);
 110     CPUUniCore32State *env = &cpu->env;
 111
 112     cs->env_ptr = env;
 113
 114 #ifdef CONFIG_USER_ONLY
 115     env->uncached_asr = ASR_MODE_USER;
 116     env->regs[31] = 0;
 117 #else
 118     env->uncached_asr = ASR_MODE_PRIV;
 119     env->regs[31] = 0x03000000;
 120 #endif
 121
 122     tlb_flush(cs);
 123 }
 124
 125 static const VMStateDescription vmstate_uc32_cpu = {
 126     .name = "cpu",
 127     .unmigratable = 1,
 128 };
 129
 130 static void uc32_cpu_class_init(ObjectClass *oc, void *data)
 131 {
 132     DeviceClass *dc = DEVICE_CLASS(oc);
 133     CPUClass *cc = CPU_CLASS(oc);
 134     UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
 135
 136     device_class_set_parent_realize(dc, uc32_cpu_realizefn,
 137                                     &ucc->parent_realize);
 138
 139     cc->class_by_name = uc32_cpu_class_by_name;
 140     cc->has_work = uc32_cpu_has_work;
 141     cc->do_interrupt = uc32_cpu_do_interrupt;
 142     cc->cpu_exec_interrupt = uc32_cpu_exec_interrupt;
 143     cc->dump_state = uc32_cpu_dump_state;
 144     cc->set_pc = uc32_cpu_set_pc;
 145 #ifdef CONFIG_USER_ONLY
 146     cc->handle_mmu_fault = uc32_cpu_handle_mmu_fault;
 147 #else
 148     cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
 149 #endif
 150     cc->tcg_initialize = uc32_translate_init;
 151     dc->vmsd = &vmstate_uc32_cpu;
 152 }
 153
 154 #define DEFINE_UNICORE32_CPU_TYPE(cpu_model, initfn) \
 155     {                                                \
 156         .parent = TYPE_UNICORE32_CPU,                \
 157         .instance_init = initfn,                     \
 158         .name = UNICORE32_CPU_TYPE_NAME(cpu_model),  \
 159     }
 160
 161 static const TypeInfo uc32_cpu_type_infos[] = {
 162     {
 163         .name = TYPE_UNICORE32_CPU,
 164         .parent = TYPE_CPU,
 165         .instance_size = sizeof(UniCore32CPU),
 166         .instance_init = uc32_cpu_initfn,
 167         .abstract = true,
 168         .class_size = sizeof(UniCore32CPUClass),
 169         .class_init = uc32_cpu_class_init,
 170     },
 171     DEFINE_UNICORE32_CPU_TYPE("UniCore-II", unicore_ii_cpu_initfn),
 172     DEFINE_UNICORE32_CPU_TYPE("any", uc32_any_cpu_initfn),
 173 };
 174
 175 DEFINE_TYPES(uc32_cpu_type_infos)