target-microblaze/cpu.c

   1 /*
   2  * QEMU MicroBlaze CPU
   3  *
   4  * Copyright (c) 2009 Edgar E. Iglesias
   5  * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
   6  * Copyright (c) 2012 SUSE LINUX Products GmbH
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, see
  20  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  21  */
  22
  23 #include "cpu.h"
  24 #include "qemu-common.h"
  25 #include "hw/qdev-properties.h"
  26 #include "migration/vmstate.h"
  27
  28
  29 /* CPUClass::reset() */
  30 static void mb_cpu_reset(CPUState *s)
  31 {
  32     MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
  33     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
  34     CPUMBState *env = &cpu->env;
  35
  36     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
  37         qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
  38         log_cpu_state(env, 0);
  39     }
  40
  41     mcc->parent_reset(s);
  42
  43     memset(env, 0, offsetof(CPUMBState, breakpoints));
  44     env->res_addr = RES_ADDR_NONE;
  45     tlb_flush(env, 1);
  46
  47     /* Disable stack protector.  */
  48     env->shr = ~0;
  49
  50     env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
  51                        | PVR0_USE_BARREL_MASK \
  52                        | PVR0_USE_DIV_MASK \
  53                        | PVR0_USE_HW_MUL_MASK \
  54                        | PVR0_USE_EXC_MASK \
  55                        | PVR0_USE_ICACHE_MASK \
  56                        | PVR0_USE_DCACHE_MASK \
  57                        | PVR0_USE_MMU \
  58                        | (0xb << 8);
  59     env->pvr.regs[2] = PVR2_D_OPB_MASK \
  60                         | PVR2_D_LMB_MASK \
  61                         | PVR2_I_OPB_MASK \
  62                         | PVR2_I_LMB_MASK \
  63                         | PVR2_USE_MSR_INSTR \
  64                         | PVR2_USE_PCMP_INSTR \
  65                         | PVR2_USE_BARREL_MASK \
  66                         | PVR2_USE_DIV_MASK \
  67                         | PVR2_USE_HW_MUL_MASK \
  68                         | PVR2_USE_MUL64_MASK \
  69                         | PVR2_USE_FPU_MASK \
  70                         | PVR2_USE_FPU2_MASK \
  71                         | PVR2_FPU_EXC_MASK \
  72                         | 0;
  73     env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family.  */
  74     env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
  75
  76 #if defined(CONFIG_USER_ONLY)
  77     /* start in user mode with interrupts enabled.  */
  78     env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
  79     env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp.  */
  80 #else
  81     env->sregs[SR_MSR] = 0;
  82     mmu_init(&env->mmu);
  83     env->mmu.c_mmu = 3;
  84     env->mmu.c_mmu_tlb_access = 3;
  85     env->mmu.c_mmu_zones = 16;
  86 #endif
  87 }
  88
  89 static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
  90 {
  91     MicroBlazeCPU *cpu = MICROBLAZE_CPU(dev);
  92     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev);
  93
  94     cpu_reset(CPU(cpu));
  95     qemu_init_vcpu(&cpu->env);
  96
  97     mcc->parent_realize(dev, errp);
  98 }
  99
 100 static void mb_cpu_initfn(Object *obj)
 101 {
 102     CPUState *cs = CPU(obj);
 103     MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
 104     CPUMBState *env = &cpu->env;
 105     static bool tcg_initialized;
 106
 107     cs->env_ptr = env;
 108     cpu_exec_init(env);
 109
 110     set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
 111
 112     if (tcg_enabled() && !tcg_initialized) {
 113         tcg_initialized = true;
 114         mb_tcg_init();
 115     }
 116 }
 117
 118 static const VMStateDescription vmstate_mb_cpu = {
 119     .name = "cpu",
 120     .unmigratable = 1,
 121 };
 122
 123 static Property mb_properties[] = {
 124     DEFINE_PROP_UINT32("xlnx.base-vectors", MicroBlazeCPU, base_vectors, 0),
 125     DEFINE_PROP_END_OF_LIST(),
 126 };
 127
 128 static void mb_cpu_class_init(ObjectClass *oc, void *data)
 129 {
 130     DeviceClass *dc = DEVICE_CLASS(oc);
 131     CPUClass *cc = CPU_CLASS(oc);
 132     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc);
 133
 134     mcc->parent_realize = dc->realize;
 135     dc->realize = mb_cpu_realizefn;
 136
 137     mcc->parent_reset = cc->reset;
 138     cc->reset = mb_cpu_reset;
 139
 140     cc->do_interrupt = mb_cpu_do_interrupt;
 141     dc->vmsd = &vmstate_mb_cpu;
 142
 143     dc->props = mb_properties;
 144 }
 145
 146 static const TypeInfo mb_cpu_type_info = {
 147     .name = TYPE_MICROBLAZE_CPU,
 148     .parent = TYPE_CPU,
 149     .instance_size = sizeof(MicroBlazeCPU),
 150     .instance_init = mb_cpu_initfn,
 151     .class_size = sizeof(MicroBlazeCPUClass),
 152     .class_init = mb_cpu_class_init,
 153 };
 154
 155 static void mb_cpu_register_types(void)
 156 {
 157     type_register_static(&mb_cpu_type_info);
 158 }
 159
 160 type_init(mb_cpu_register_types)