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  * Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see
  21  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  22  */
  23
  24 #include "qemu/osdep.h"
  25 #include "qapi/error.h"
  26 #include "cpu.h"
  27 #include "qemu-common.h"
  28 #include "hw/qdev-properties.h"
  29 #include "migration/vmstate.h"
  30 #include "exec/exec-all.h"
  31
  32 static const struct {
  33     const char *name;
  34     uint8_t version_id;
  35 } mb_cpu_lookup[] = {
  36     /* These key value are as per MBV field in PVR0 */
  37     {"5.00.a", 0x01},
  38     {"5.00.b", 0x02},
  39     {"5.00.c", 0x03},
  40     {"6.00.a", 0x04},
  41     {"6.00.b", 0x06},
  42     {"7.00.a", 0x05},
  43     {"7.00.b", 0x07},
  44     {"7.10.a", 0x08},
  45     {"7.10.b", 0x09},
  46     {"7.10.c", 0x0a},
  47     {"7.10.d", 0x0b},
  48     {"7.20.a", 0x0c},
  49     {"7.20.b", 0x0d},
  50     {"7.20.c", 0x0e},
  51     {"7.20.d", 0x0f},
  52     {"7.30.a", 0x10},
  53     {"7.30.b", 0x11},
  54     {"8.00.a", 0x12},
  55     {"8.00.b", 0x13},
  56     {"8.10.a", 0x14},
  57     {"8.20.a", 0x15},
  58     {"8.20.b", 0x16},
  59     {"8.30.a", 0x17},
  60     {"8.40.a", 0x18},
  61     {"8.40.b", 0x19},
  62     {"8.50.a", 0x1A},
  63     {"9.0", 0x1B},
  64     {"9.1", 0x1D},
  65     {"9.2", 0x1F},
  66     {"9.3", 0x20},
  67     {"9.4", 0x21},
  68     {"9.5", 0x22},
  69     {"9.6", 0x23},
  70     {"10.0", 0x24},
  71     {NULL, 0},
  72 };
  73
  74 static void mb_cpu_set_pc(CPUState *cs, vaddr value)
  75 {
  76     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
  77
  78     cpu->env.sregs[SR_PC] = value;
  79 }
  80
  81 static bool mb_cpu_has_work(CPUState *cs)
  82 {
  83     return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
  84 }
  85
  86 #ifndef CONFIG_USER_ONLY
  87 static void microblaze_cpu_set_irq(void *opaque, int irq, int level)
  88 {
  89     MicroBlazeCPU *cpu = opaque;
  90     CPUState *cs = CPU(cpu);
  91     int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD;
  92
  93     if (level) {
  94         cpu_interrupt(cs, type);
  95     } else {
  96         cpu_reset_interrupt(cs, type);
  97     }
  98 }
  99 #endif
 100
 101 /* CPUClass::reset() */
 102 static void mb_cpu_reset(CPUState *s)
 103 {
 104     MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
 105     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
 106     CPUMBState *env = &cpu->env;
 107
 108     mcc->parent_reset(s);
 109
 110     memset(env, 0, offsetof(CPUMBState, end_reset_fields));
 111     env->res_addr = RES_ADDR_NONE;
 112
 113     /* Disable stack protector.  */
 114     env->shr = ~0;
 115
 116     env->sregs[SR_PC] = cpu->cfg.base_vectors;
 117
 118 #if defined(CONFIG_USER_ONLY)
 119     /* start in user mode with interrupts enabled.  */
 120     env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
 121 #else
 122     env->sregs[SR_MSR] = 0;
 123     mmu_init(&env->mmu);
 124     env->mmu.c_mmu = 3;
 125     env->mmu.c_mmu_tlb_access = 3;
 126     env->mmu.c_mmu_zones = 16;
 127 #endif
 128 }
 129
 130 static void mb_disas_set_info(CPUState *cpu, disassemble_info *info)
 131 {
 132     info->mach = bfd_arch_microblaze;
 133     info->print_insn = print_insn_microblaze;
 134 }
 135
 136 static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
 137 {
 138     CPUState *cs = CPU(dev);
 139     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev);
 140     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
 141     CPUMBState *env = &cpu->env;
 142     uint8_t version_code = 0;
 143     int i = 0;
 144     Error *local_err = NULL;
 145
 146     cpu_exec_realizefn(cs, &local_err);
 147     if (local_err != NULL) {
 148         error_propagate(errp, local_err);
 149         return;
 150     }
 151
 152     qemu_init_vcpu(cs);
 153
 154     env->pvr.regs[0] = PVR0_USE_EXC_MASK \
 155                        | PVR0_USE_ICACHE_MASK \
 156                        | PVR0_USE_DCACHE_MASK;
 157     env->pvr.regs[2] = PVR2_D_OPB_MASK \
 158                         | PVR2_D_LMB_MASK \
 159                         | PVR2_I_OPB_MASK \
 160                         | PVR2_I_LMB_MASK \
 161                         | PVR2_FPU_EXC_MASK \
 162                         | 0;
 163
 164     for (i = 0; mb_cpu_lookup[i].name && cpu->cfg.version; i++) {
 165         if (strcmp(mb_cpu_lookup[i].name, cpu->cfg.version) == 0) {
 166             version_code = mb_cpu_lookup[i].version_id;
 167             break;
 168         }
 169     }
 170
 171     if (!version_code) {
 172         qemu_log("Invalid MicroBlaze version number: %s\n", cpu->cfg.version);
 173     }
 174
 175     env->pvr.regs[0] |= (cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) |
 176                         (cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) |
 177                         (cpu->cfg.use_hw_mul ? PVR0_USE_HW_MUL_MASK : 0) |
 178                         (cpu->cfg.use_barrel ? PVR0_USE_BARREL_MASK : 0) |
 179                         (cpu->cfg.use_div ? PVR0_USE_DIV_MASK : 0) |
 180                         (cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) |
 181                         (cpu->cfg.endi ? PVR0_ENDI_MASK : 0) |
 182                         (version_code << PVR0_VERSION_SHIFT) |
 183                         (cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0);
 184
 185     env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) |
 186                         (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0) |
 187                         (cpu->cfg.use_hw_mul ? PVR2_USE_HW_MUL_MASK : 0) |
 188                         (cpu->cfg.use_hw_mul > 1 ? PVR2_USE_MUL64_MASK : 0) |
 189                         (cpu->cfg.use_barrel ? PVR2_USE_BARREL_MASK : 0) |
 190                         (cpu->cfg.use_div ? PVR2_USE_DIV_MASK : 0) |
 191                         (cpu->cfg.use_msr_instr ? PVR2_USE_MSR_INSTR : 0) |
 192                         (cpu->cfg.use_pcmp_instr ? PVR2_USE_PCMP_INSTR : 0);
 193
 194     env->pvr.regs[5] |= cpu->cfg.dcache_writeback ?
 195                                         PVR5_DCACHE_WRITEBACK_MASK : 0;
 196
 197     env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family.  */
 198     env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
 199
 200     mcc->parent_realize(dev, errp);
 201 }
 202
 203 static void mb_cpu_initfn(Object *obj)
 204 {
 205     CPUState *cs = CPU(obj);
 206     MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
 207     CPUMBState *env = &cpu->env;
 208     static bool tcg_initialized;
 209
 210     cs->env_ptr = env;
 211
 212     set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
 213
 214 #ifndef CONFIG_USER_ONLY
 215     /* Inbound IRQ and FIR lines */
 216     qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2);
 217 #endif
 218
 219     if (tcg_enabled() && !tcg_initialized) {
 220         tcg_initialized = true;
 221         mb_tcg_init();
 222     }
 223 }
 224
 225 static const VMStateDescription vmstate_mb_cpu = {
 226     .name = "cpu",
 227     .unmigratable = 1,
 228 };
 229
 230 static Property mb_properties[] = {
 231     DEFINE_PROP_UINT32("base-vectors", MicroBlazeCPU, cfg.base_vectors, 0),
 232     DEFINE_PROP_BOOL("use-stack-protection", MicroBlazeCPU, cfg.stackprot,
 233                      false),
 234     /* If use-fpu > 0 - FPU is enabled
 235      * If use-fpu = 2 - Floating point conversion and square root instructions
 236      *                  are enabled
 237      */
 238     DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2),
 239     /* If use-hw-mul > 0 - Multiplier is enabled
 240      * If use-hw-mul = 2 - 64-bit multiplier is enabled
 241      */
 242     DEFINE_PROP_UINT8("use-hw-mul", MicroBlazeCPU, cfg.use_hw_mul, 2),
 243     DEFINE_PROP_BOOL("use-barrel", MicroBlazeCPU, cfg.use_barrel, true),
 244     DEFINE_PROP_BOOL("use-div", MicroBlazeCPU, cfg.use_div, true),
 245     DEFINE_PROP_BOOL("use-msr-instr", MicroBlazeCPU, cfg.use_msr_instr, true),
 246     DEFINE_PROP_BOOL("use-pcmp-instr", MicroBlazeCPU, cfg.use_pcmp_instr, true),
 247     DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true),
 248     DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback,
 249                      false),
 250     DEFINE_PROP_BOOL("endianness", MicroBlazeCPU, cfg.endi, false),
 251     DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version),
 252     DEFINE_PROP_UINT8("pvr", MicroBlazeCPU, cfg.pvr, C_PVR_FULL),
 253     DEFINE_PROP_END_OF_LIST(),
 254 };
 255
 256 static ObjectClass *mb_cpu_class_by_name(const char *cpu_model)
 257 {
 258     return object_class_by_name(TYPE_MICROBLAZE_CPU);
 259 }
 260
 261 static void mb_cpu_class_init(ObjectClass *oc, void *data)
 262 {
 263     DeviceClass *dc = DEVICE_CLASS(oc);
 264     CPUClass *cc = CPU_CLASS(oc);
 265     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc);
 266
 267     mcc->parent_realize = dc->realize;
 268     dc->realize = mb_cpu_realizefn;
 269
 270     mcc->parent_reset = cc->reset;
 271     cc->reset = mb_cpu_reset;
 272
 273     cc->class_by_name = mb_cpu_class_by_name;
 274     cc->has_work = mb_cpu_has_work;
 275     cc->do_interrupt = mb_cpu_do_interrupt;
 276     cc->cpu_exec_interrupt = mb_cpu_exec_interrupt;
 277     cc->dump_state = mb_cpu_dump_state;
 278     cc->set_pc = mb_cpu_set_pc;
 279     cc->gdb_read_register = mb_cpu_gdb_read_register;
 280     cc->gdb_write_register = mb_cpu_gdb_write_register;
 281 #ifdef CONFIG_USER_ONLY
 282     cc->handle_mmu_fault = mb_cpu_handle_mmu_fault;
 283 #else
 284     cc->do_unassigned_access = mb_cpu_unassigned_access;
 285     cc->get_phys_page_debug = mb_cpu_get_phys_page_debug;
 286 #endif
 287     dc->vmsd = &vmstate_mb_cpu;
 288     dc->props = mb_properties;
 289     cc->gdb_num_core_regs = 32 + 5;
 290
 291     cc->disas_set_info = mb_disas_set_info;
 292 }
 293
 294 static const TypeInfo mb_cpu_type_info = {
 295     .name = TYPE_MICROBLAZE_CPU,
 296     .parent = TYPE_CPU,
 297     .instance_size = sizeof(MicroBlazeCPU),
 298     .instance_init = mb_cpu_initfn,
 299     .class_size = sizeof(MicroBlazeCPUClass),
 300     .class_init = mb_cpu_class_init,
 301 };
 302
 303 static void mb_cpu_register_types(void)
 304 {
 305     type_register_static(&mb_cpu_type_info);
 306 }
 307
 308 type_init(mb_cpu_register_types)