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/module.h" 28 #include "hw/qdev-properties.h" 29 #include "migration/vmstate.h" 30 #include "exec/exec-all.h" 31 #include "fpu/softfloat-helpers.h" 32 33 static const struct { 34 const char *name; 35 uint8_t version_id; 36 } mb_cpu_lookup[] = { 37 /* These key value are as per MBV field in PVR0 */ 38 {"5.00.a", 0x01}, 39 {"5.00.b", 0x02}, 40 {"5.00.c", 0x03}, 41 {"6.00.a", 0x04}, 42 {"6.00.b", 0x06}, 43 {"7.00.a", 0x05}, 44 {"7.00.b", 0x07}, 45 {"7.10.a", 0x08}, 46 {"7.10.b", 0x09}, 47 {"7.10.c", 0x0a}, 48 {"7.10.d", 0x0b}, 49 {"7.20.a", 0x0c}, 50 {"7.20.b", 0x0d}, 51 {"7.20.c", 0x0e}, 52 {"7.20.d", 0x0f}, 53 {"7.30.a", 0x10}, 54 {"7.30.b", 0x11}, 55 {"8.00.a", 0x12}, 56 {"8.00.b", 0x13}, 57 {"8.10.a", 0x14}, 58 {"8.20.a", 0x15}, 59 {"8.20.b", 0x16}, 60 {"8.30.a", 0x17}, 61 {"8.40.a", 0x18}, 62 {"8.40.b", 0x19}, 63 {"8.50.a", 0x1A}, 64 {"9.0", 0x1B}, 65 {"9.1", 0x1D}, 66 {"9.2", 0x1F}, 67 {"9.3", 0x20}, 68 {"9.4", 0x21}, 69 {"9.5", 0x22}, 70 {"9.6", 0x23}, 71 {"10.0", 0x24}, 72 {NULL, 0}, 73 }; 74 75 /* If no specific version gets selected, default to the following. */ 76 #define DEFAULT_CPU_VERSION "10.0" 77 78 static void mb_cpu_set_pc(CPUState *cs, vaddr value) 79 { 80 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); 81 82 cpu->env.sregs[SR_PC] = value; 83 } 84 85 static bool mb_cpu_has_work(CPUState *cs) 86 { 87 return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI); 88 } 89 90 #ifndef CONFIG_USER_ONLY 91 static void microblaze_cpu_set_irq(void *opaque, int irq, int level) 92 { 93 MicroBlazeCPU *cpu = opaque; 94 CPUState *cs = CPU(cpu); 95 int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD; 96 97 if (level) { 98 cpu_interrupt(cs, type); 99 } else { 100 cpu_reset_interrupt(cs, type); 101 } 102 } 103 #endif 104 105 static void mb_cpu_reset(DeviceState *dev) 106 { 107 CPUState *s = CPU(dev); 108 MicroBlazeCPU *cpu = MICROBLAZE_CPU(s); 109 MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu); 110 CPUMBState *env = &cpu->env; 111 112 mcc->parent_reset(dev); 113 114 memset(env, 0, offsetof(CPUMBState, end_reset_fields)); 115 env->res_addr = RES_ADDR_NONE; 116 117 /* Disable stack protector. */ 118 env->shr = ~0; 119 120 env->sregs[SR_PC] = cpu->cfg.base_vectors; 121 122 #if defined(CONFIG_USER_ONLY) 123 /* start in user mode with interrupts enabled. */ 124 env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM; 125 #else 126 env->sregs[SR_MSR] = 0; 127 mmu_init(&env->mmu); 128 env->mmu.c_mmu = 3; 129 env->mmu.c_mmu_tlb_access = 3; 130 env->mmu.c_mmu_zones = 16; 131 env->mmu.c_addr_mask = MAKE_64BIT_MASK(0, cpu->cfg.addr_size); 132 #endif 133 } 134 135 static void mb_disas_set_info(CPUState *cpu, disassemble_info *info) 136 { 137 info->mach = bfd_arch_microblaze; 138 info->print_insn = print_insn_microblaze; 139 } 140 141 static void mb_cpu_realizefn(DeviceState *dev, Error **errp) 142 { 143 CPUState *cs = CPU(dev); 144 MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev); 145 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); 146 CPUMBState *env = &cpu->env; 147 uint8_t version_code = 0; 148 const char *version; 149 int i = 0; 150 Error *local_err = NULL; 151 152 cpu_exec_realizefn(cs, &local_err); 153 if (local_err != NULL) { 154 error_propagate(errp, local_err); 155 return; 156 } 157 158 if (cpu->cfg.addr_size < 32 || cpu->cfg.addr_size > 64) { 159 error_setg(errp, "addr-size %d is out of range (32 - 64)", 160 cpu->cfg.addr_size); 161 return; 162 } 163 164 qemu_init_vcpu(cs); 165 166 env->pvr.regs[0] = PVR0_USE_EXC_MASK 167 | PVR0_USE_ICACHE_MASK 168 | PVR0_USE_DCACHE_MASK; 169 env->pvr.regs[2] = PVR2_D_OPB_MASK 170 | PVR2_D_LMB_MASK 171 | PVR2_I_OPB_MASK 172 | PVR2_I_LMB_MASK 173 | PVR2_FPU_EXC_MASK 174 | 0; 175 176 version = cpu->cfg.version ? cpu->cfg.version : DEFAULT_CPU_VERSION; 177 for (i = 0; mb_cpu_lookup[i].name && version; i++) { 178 if (strcmp(mb_cpu_lookup[i].name, version) == 0) { 179 version_code = mb_cpu_lookup[i].version_id; 180 break; 181 } 182 } 183 184 if (!version_code) { 185 qemu_log("Invalid MicroBlaze version number: %s\n", cpu->cfg.version); 186 } 187 188 env->pvr.regs[0] |= (cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) | 189 (cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) | 190 (cpu->cfg.use_hw_mul ? PVR0_USE_HW_MUL_MASK : 0) | 191 (cpu->cfg.use_barrel ? PVR0_USE_BARREL_MASK : 0) | 192 (cpu->cfg.use_div ? PVR0_USE_DIV_MASK : 0) | 193 (cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) | 194 (cpu->cfg.endi ? PVR0_ENDI_MASK : 0) | 195 (version_code << PVR0_VERSION_SHIFT) | 196 (cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0) | 197 cpu->cfg.pvr_user1; 198 199 env->pvr.regs[1] = cpu->cfg.pvr_user2; 200 env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) | 201 (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0) | 202 (cpu->cfg.use_hw_mul ? PVR2_USE_HW_MUL_MASK : 0) | 203 (cpu->cfg.use_hw_mul > 1 ? PVR2_USE_MUL64_MASK : 0) | 204 (cpu->cfg.use_barrel ? PVR2_USE_BARREL_MASK : 0) | 205 (cpu->cfg.use_div ? PVR2_USE_DIV_MASK : 0) | 206 (cpu->cfg.use_msr_instr ? PVR2_USE_MSR_INSTR : 0) | 207 (cpu->cfg.use_pcmp_instr ? PVR2_USE_PCMP_INSTR : 0) | 208 (cpu->cfg.dopb_bus_exception ? 209 PVR2_DOPB_BUS_EXC_MASK : 0) | 210 (cpu->cfg.iopb_bus_exception ? 211 PVR2_IOPB_BUS_EXC_MASK : 0) | 212 (cpu->cfg.div_zero_exception ? 213 PVR2_DIV_ZERO_EXC_MASK : 0) | 214 (cpu->cfg.illegal_opcode_exception ? 215 PVR2_ILL_OPCODE_EXC_MASK : 0) | 216 (cpu->cfg.unaligned_exceptions ? 217 PVR2_UNALIGNED_EXC_MASK : 0) | 218 (cpu->cfg.opcode_0_illegal ? 219 PVR2_OPCODE_0x0_ILL_MASK : 0); 220 221 env->pvr.regs[5] |= cpu->cfg.dcache_writeback ? 222 PVR5_DCACHE_WRITEBACK_MASK : 0; 223 224 env->pvr.regs[10] = 0x0c000000 | /* Default to spartan 3a dsp family. */ 225 (cpu->cfg.addr_size - 32) << PVR10_ASIZE_SHIFT; 226 env->pvr.regs[11] = (cpu->cfg.use_mmu ? PVR11_USE_MMU : 0) | 227 16 << 17; 228 229 mcc->parent_realize(dev, errp); 230 } 231 232 static void mb_cpu_initfn(Object *obj) 233 { 234 MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj); 235 CPUMBState *env = &cpu->env; 236 237 cpu_set_cpustate_pointers(cpu); 238 239 set_float_rounding_mode(float_round_nearest_even, &env->fp_status); 240 241 #ifndef CONFIG_USER_ONLY 242 /* Inbound IRQ and FIR lines */ 243 qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2); 244 #endif 245 } 246 247 static const VMStateDescription vmstate_mb_cpu = { 248 .name = "cpu", 249 .unmigratable = 1, 250 }; 251 252 static Property mb_properties[] = { 253 DEFINE_PROP_UINT32("base-vectors", MicroBlazeCPU, cfg.base_vectors, 0), 254 DEFINE_PROP_BOOL("use-stack-protection", MicroBlazeCPU, cfg.stackprot, 255 false), 256 /* 257 * This is the C_ADDR_SIZE synth-time configuration option of the 258 * MicroBlaze cores. Supported values range between 32 and 64. 259 * 260 * When set to > 32, 32bit MicroBlaze can emit load/stores 261 * with extended addressing. 262 */ 263 DEFINE_PROP_UINT8("addr-size", MicroBlazeCPU, cfg.addr_size, 32), 264 /* If use-fpu > 0 - FPU is enabled 265 * If use-fpu = 2 - Floating point conversion and square root instructions 266 * are enabled 267 */ 268 DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2), 269 /* If use-hw-mul > 0 - Multiplier is enabled 270 * If use-hw-mul = 2 - 64-bit multiplier is enabled 271 */ 272 DEFINE_PROP_UINT8("use-hw-mul", MicroBlazeCPU, cfg.use_hw_mul, 2), 273 DEFINE_PROP_BOOL("use-barrel", MicroBlazeCPU, cfg.use_barrel, true), 274 DEFINE_PROP_BOOL("use-div", MicroBlazeCPU, cfg.use_div, true), 275 DEFINE_PROP_BOOL("use-msr-instr", MicroBlazeCPU, cfg.use_msr_instr, true), 276 DEFINE_PROP_BOOL("use-pcmp-instr", MicroBlazeCPU, cfg.use_pcmp_instr, true), 277 DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true), 278 DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback, 279 false), 280 DEFINE_PROP_BOOL("endianness", MicroBlazeCPU, cfg.endi, false), 281 /* Enables bus exceptions on failed data accesses (load/stores). */ 282 DEFINE_PROP_BOOL("dopb-bus-exception", MicroBlazeCPU, 283 cfg.dopb_bus_exception, false), 284 /* Enables bus exceptions on failed instruction fetches. */ 285 DEFINE_PROP_BOOL("iopb-bus-exception", MicroBlazeCPU, 286 cfg.iopb_bus_exception, false), 287 DEFINE_PROP_BOOL("ill-opcode-exception", MicroBlazeCPU, 288 cfg.illegal_opcode_exception, false), 289 DEFINE_PROP_BOOL("div-zero-exception", MicroBlazeCPU, 290 cfg.div_zero_exception, false), 291 DEFINE_PROP_BOOL("unaligned-exceptions", MicroBlazeCPU, 292 cfg.unaligned_exceptions, false), 293 DEFINE_PROP_BOOL("opcode-0x0-illegal", MicroBlazeCPU, 294 cfg.opcode_0_illegal, false), 295 DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version), 296 DEFINE_PROP_UINT8("pvr", MicroBlazeCPU, cfg.pvr, C_PVR_FULL), 297 DEFINE_PROP_UINT8("pvr-user1", MicroBlazeCPU, cfg.pvr_user1, 0), 298 DEFINE_PROP_UINT32("pvr-user2", MicroBlazeCPU, cfg.pvr_user2, 0), 299 DEFINE_PROP_END_OF_LIST(), 300 }; 301 302 static ObjectClass *mb_cpu_class_by_name(const char *cpu_model) 303 { 304 return object_class_by_name(TYPE_MICROBLAZE_CPU); 305 } 306 307 static void mb_cpu_class_init(ObjectClass *oc, void *data) 308 { 309 DeviceClass *dc = DEVICE_CLASS(oc); 310 CPUClass *cc = CPU_CLASS(oc); 311 MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc); 312 313 device_class_set_parent_realize(dc, mb_cpu_realizefn, 314 &mcc->parent_realize); 315 device_class_set_parent_reset(dc, mb_cpu_reset, &mcc->parent_reset); 316 317 cc->class_by_name = mb_cpu_class_by_name; 318 cc->has_work = mb_cpu_has_work; 319 cc->do_interrupt = mb_cpu_do_interrupt; 320 cc->cpu_exec_interrupt = mb_cpu_exec_interrupt; 321 cc->dump_state = mb_cpu_dump_state; 322 cc->set_pc = mb_cpu_set_pc; 323 cc->gdb_read_register = mb_cpu_gdb_read_register; 324 cc->gdb_write_register = mb_cpu_gdb_write_register; 325 cc->tlb_fill = mb_cpu_tlb_fill; 326 #ifndef CONFIG_USER_ONLY 327 cc->do_transaction_failed = mb_cpu_transaction_failed; 328 cc->get_phys_page_debug = mb_cpu_get_phys_page_debug; 329 #endif 330 dc->vmsd = &vmstate_mb_cpu; 331 device_class_set_props(dc, mb_properties); 332 cc->gdb_num_core_regs = 32 + 27; 333 334 cc->disas_set_info = mb_disas_set_info; 335 cc->tcg_initialize = mb_tcg_init; 336 } 337 338 static const TypeInfo mb_cpu_type_info = { 339 .name = TYPE_MICROBLAZE_CPU, 340 .parent = TYPE_CPU, 341 .instance_size = sizeof(MicroBlazeCPU), 342 .instance_init = mb_cpu_initfn, 343 .class_size = sizeof(MicroBlazeCPUClass), 344 .class_init = mb_cpu_class_init, 345 }; 346 347 static void mb_cpu_register_types(void) 348 { 349 type_register_static(&mb_cpu_type_info); 350 } 351 352 type_init(mb_cpu_register_types) 353