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 static void mb_cpu_set_pc(CPUState *cs, vaddr value)
  30 {
  31     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
  32
  33     cpu->env.sregs[SR_PC] = value;
  34 }
  35
  36 /* CPUClass::reset() */
  37 static void mb_cpu_reset(CPUState *s)
  38 {
  39     MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
  40     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
  41     CPUMBState *env = &cpu->env;
  42
  43     mcc->parent_reset(s);
  44
  45     memset(env, 0, offsetof(CPUMBState, breakpoints));
  46     env->res_addr = RES_ADDR_NONE;
  47     tlb_flush(env, 1);
  48
  49     /* Disable stack protector.  */
  50     env->shr = ~0;
  51
  52     env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
  53                        | PVR0_USE_BARREL_MASK \
  54                        | PVR0_USE_DIV_MASK \
  55                        | PVR0_USE_HW_MUL_MASK \
  56                        | PVR0_USE_EXC_MASK \
  57                        | PVR0_USE_ICACHE_MASK \
  58                        | PVR0_USE_DCACHE_MASK \
  59                        | PVR0_USE_MMU \
  60                        | (0xb << 8);
  61     env->pvr.regs[2] = PVR2_D_OPB_MASK \
  62                         | PVR2_D_LMB_MASK \
  63                         | PVR2_I_OPB_MASK \
  64                         | PVR2_I_LMB_MASK \
  65                         | PVR2_USE_MSR_INSTR \
  66                         | PVR2_USE_PCMP_INSTR \
  67                         | PVR2_USE_BARREL_MASK \
  68                         | PVR2_USE_DIV_MASK \
  69                         | PVR2_USE_HW_MUL_MASK \
  70                         | PVR2_USE_MUL64_MASK \
  71                         | PVR2_USE_FPU_MASK \
  72                         | PVR2_USE_FPU2_MASK \
  73                         | PVR2_FPU_EXC_MASK \
  74                         | 0;
  75     env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family.  */
  76     env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
  77
  78 #if defined(CONFIG_USER_ONLY)
  79     /* start in user mode with interrupts enabled.  */
  80     env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
  81     env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp.  */
  82 #else
  83     env->sregs[SR_MSR] = 0;
  84     mmu_init(&env->mmu);
  85     env->mmu.c_mmu = 3;
  86     env->mmu.c_mmu_tlb_access = 3;
  87     env->mmu.c_mmu_zones = 16;
  88 #endif
  89 }
  90
  91 static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
  92 {
  93     MicroBlazeCPU *cpu = MICROBLAZE_CPU(dev);
  94     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev);
  95
  96     cpu_reset(CPU(cpu));
  97
  98     mcc->parent_realize(dev, errp);
  99 }
 100
 101 static void mb_cpu_initfn(Object *obj)
 102 {
 103     CPUState *cs = CPU(obj);
 104     MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
 105     CPUMBState *env = &cpu->env;
 106     static bool tcg_initialized;
 107
 108     cs->env_ptr = env;
 109     cpu_exec_init(env);
 110
 111     set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
 112
 113     if (tcg_enabled() && !tcg_initialized) {
 114         tcg_initialized = true;
 115         mb_tcg_init();
 116     }
 117 }
 118
 119 static const VMStateDescription vmstate_mb_cpu = {
 120     .name = "cpu",
 121     .unmigratable = 1,
 122 };
 123
 124 static Property mb_properties[] = {
 125     DEFINE_PROP_UINT32("xlnx.base-vectors", MicroBlazeCPU, base_vectors, 0),
 126     DEFINE_PROP_END_OF_LIST(),
 127 };
 128
 129 static void mb_cpu_class_init(ObjectClass *oc, void *data)
 130 {
 131     DeviceClass *dc = DEVICE_CLASS(oc);
 132     CPUClass *cc = CPU_CLASS(oc);
 133     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc);
 134
 135     mcc->parent_realize = dc->realize;
 136     dc->realize = mb_cpu_realizefn;
 137
 138     mcc->parent_reset = cc->reset;
 139     cc->reset = mb_cpu_reset;
 140
 141     cc->do_interrupt = mb_cpu_do_interrupt;
 142     cc->dump_state = mb_cpu_dump_state;
 143     cpu_class_set_do_unassigned_access(cc, mb_cpu_unassigned_access);
 144     cc->set_pc = mb_cpu_set_pc;
 145     dc->vmsd = &vmstate_mb_cpu;
 146     dc->props = mb_properties;
 147 }
 148
 149 static const TypeInfo mb_cpu_type_info = {
 150     .name = TYPE_MICROBLAZE_CPU,
 151     .parent = TYPE_CPU,
 152     .instance_size = sizeof(MicroBlazeCPU),
 153     .instance_init = mb_cpu_initfn,
 154     .class_size = sizeof(MicroBlazeCPUClass),
 155     .class_init = mb_cpu_class_init,
 156 };
 157
 158 static void mb_cpu_register_types(void)
 159 {
 160     type_register_static(&mb_cpu_type_info);
 161 }
 162
 163 type_init(mb_cpu_register_types)