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 "exec/exec-all.h" 30 #include "fpu/softfloat-helpers.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 /* If no specific version gets selected, default to the following. */ 75 #define DEFAULT_CPU_VERSION "10.0" 76 77 static void mb_cpu_set_pc(CPUState *cs, vaddr value) 78 { 79 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); 80 81 cpu->env.pc = value; 82 /* Ensure D_FLAG and IMM_FLAG are clear for the new PC */ 83 cpu->env.iflags = 0; 84 } 85 86 static void mb_cpu_synchronize_from_tb(CPUState *cs, 87 const TranslationBlock *tb) 88 { 89 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); 90 91 cpu->env.pc = tb->pc; 92 cpu->env.iflags = tb->flags & IFLAGS_TB_MASK; 93 } 94 95 static bool mb_cpu_has_work(CPUState *cs) 96 { 97 return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI); 98 } 99 100 #ifndef CONFIG_USER_ONLY 101 static void mb_cpu_ns_axi_dp(void *opaque, int irq, int level) 102 { 103 MicroBlazeCPU *cpu = opaque; 104 bool en = cpu->cfg.use_non_secure & USE_NON_SECURE_M_AXI_DP_MASK; 105 106 cpu->ns_axi_dp = level & en; 107 } 108 109 static void mb_cpu_ns_axi_ip(void *opaque, int irq, int level) 110 { 111 MicroBlazeCPU *cpu = opaque; 112 bool en = cpu->cfg.use_non_secure & USE_NON_SECURE_M_AXI_IP_MASK; 113 114 cpu->ns_axi_ip = level & en; 115 } 116 117 static void mb_cpu_ns_axi_dc(void *opaque, int irq, int level) 118 { 119 MicroBlazeCPU *cpu = opaque; 120 bool en = cpu->cfg.use_non_secure & USE_NON_SECURE_M_AXI_DC_MASK; 121 122 cpu->ns_axi_dc = level & en; 123 } 124 125 static void mb_cpu_ns_axi_ic(void *opaque, int irq, int level) 126 { 127 MicroBlazeCPU *cpu = opaque; 128 bool en = cpu->cfg.use_non_secure & USE_NON_SECURE_M_AXI_IC_MASK; 129 130 cpu->ns_axi_ic = level & en; 131 } 132 133 static void microblaze_cpu_set_irq(void *opaque, int irq, int level) 134 { 135 MicroBlazeCPU *cpu = opaque; 136 CPUState *cs = CPU(cpu); 137 int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD; 138 139 if (level) { 140 cpu_interrupt(cs, type); 141 } else { 142 cpu_reset_interrupt(cs, type); 143 } 144 } 145 #endif 146 147 static void mb_cpu_reset(DeviceState *dev) 148 { 149 CPUState *s = CPU(dev); 150 MicroBlazeCPU *cpu = MICROBLAZE_CPU(s); 151 MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu); 152 CPUMBState *env = &cpu->env; 153 154 mcc->parent_reset(dev); 155 156 memset(env, 0, offsetof(CPUMBState, end_reset_fields)); 157 env->res_addr = RES_ADDR_NONE; 158 159 /* Disable stack protector. */ 160 env->shr = ~0; 161 162 env->pc = cpu->cfg.base_vectors; 163 164 #if defined(CONFIG_USER_ONLY) 165 /* start in user mode with interrupts enabled. */ 166 mb_cpu_write_msr(env, MSR_EE | MSR_IE | MSR_VM | MSR_UM); 167 #else 168 mb_cpu_write_msr(env, 0); 169 mmu_init(&env->mmu); 170 #endif 171 } 172 173 static void mb_disas_set_info(CPUState *cpu, disassemble_info *info) 174 { 175 info->mach = bfd_arch_microblaze; 176 info->print_insn = print_insn_microblaze; 177 } 178 179 static void mb_cpu_realizefn(DeviceState *dev, Error **errp) 180 { 181 CPUState *cs = CPU(dev); 182 MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev); 183 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); 184 uint8_t version_code = 0; 185 const char *version; 186 int i = 0; 187 Error *local_err = NULL; 188 189 cpu_exec_realizefn(cs, &local_err); 190 if (local_err != NULL) { 191 error_propagate(errp, local_err); 192 return; 193 } 194 195 if (cpu->cfg.addr_size < 32 || cpu->cfg.addr_size > 64) { 196 error_setg(errp, "addr-size %d is out of range (32 - 64)", 197 cpu->cfg.addr_size); 198 return; 199 } 200 201 qemu_init_vcpu(cs); 202 203 version = cpu->cfg.version ? cpu->cfg.version : DEFAULT_CPU_VERSION; 204 for (i = 0; mb_cpu_lookup[i].name && version; i++) { 205 if (strcmp(mb_cpu_lookup[i].name, version) == 0) { 206 version_code = mb_cpu_lookup[i].version_id; 207 break; 208 } 209 } 210 211 if (!version_code) { 212 qemu_log("Invalid MicroBlaze version number: %s\n", cpu->cfg.version); 213 } 214 215 cpu->cfg.pvr_regs[0] = 216 (PVR0_USE_EXC_MASK | 217 PVR0_USE_ICACHE_MASK | 218 PVR0_USE_DCACHE_MASK | 219 (cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) | 220 (cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) | 221 (cpu->cfg.use_hw_mul ? PVR0_USE_HW_MUL_MASK : 0) | 222 (cpu->cfg.use_barrel ? PVR0_USE_BARREL_MASK : 0) | 223 (cpu->cfg.use_div ? PVR0_USE_DIV_MASK : 0) | 224 (cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) | 225 (cpu->cfg.endi ? PVR0_ENDI_MASK : 0) | 226 (version_code << PVR0_VERSION_SHIFT) | 227 (cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0) | 228 cpu->cfg.pvr_user1); 229 230 cpu->cfg.pvr_regs[1] = cpu->cfg.pvr_user2; 231 232 cpu->cfg.pvr_regs[2] = 233 (PVR2_D_OPB_MASK | 234 PVR2_D_LMB_MASK | 235 PVR2_I_OPB_MASK | 236 PVR2_I_LMB_MASK | 237 PVR2_FPU_EXC_MASK | 238 (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) | 239 (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0) | 240 (cpu->cfg.use_hw_mul ? PVR2_USE_HW_MUL_MASK : 0) | 241 (cpu->cfg.use_hw_mul > 1 ? PVR2_USE_MUL64_MASK : 0) | 242 (cpu->cfg.use_barrel ? PVR2_USE_BARREL_MASK : 0) | 243 (cpu->cfg.use_div ? PVR2_USE_DIV_MASK : 0) | 244 (cpu->cfg.use_msr_instr ? PVR2_USE_MSR_INSTR : 0) | 245 (cpu->cfg.use_pcmp_instr ? PVR2_USE_PCMP_INSTR : 0) | 246 (cpu->cfg.dopb_bus_exception ? PVR2_DOPB_BUS_EXC_MASK : 0) | 247 (cpu->cfg.iopb_bus_exception ? PVR2_IOPB_BUS_EXC_MASK : 0) | 248 (cpu->cfg.div_zero_exception ? PVR2_DIV_ZERO_EXC_MASK : 0) | 249 (cpu->cfg.illegal_opcode_exception ? PVR2_ILL_OPCODE_EXC_MASK : 0) | 250 (cpu->cfg.unaligned_exceptions ? PVR2_UNALIGNED_EXC_MASK : 0) | 251 (cpu->cfg.opcode_0_illegal ? PVR2_OPCODE_0x0_ILL_MASK : 0)); 252 253 cpu->cfg.pvr_regs[5] |= 254 cpu->cfg.dcache_writeback ? PVR5_DCACHE_WRITEBACK_MASK : 0; 255 256 cpu->cfg.pvr_regs[10] = 257 (0x0c000000 | /* Default to spartan 3a dsp family. */ 258 (cpu->cfg.addr_size - 32) << PVR10_ASIZE_SHIFT); 259 260 cpu->cfg.pvr_regs[11] = ((cpu->cfg.use_mmu ? PVR11_USE_MMU : 0) | 261 16 << 17); 262 263 cpu->cfg.mmu = 3; 264 cpu->cfg.mmu_tlb_access = 3; 265 cpu->cfg.mmu_zones = 16; 266 cpu->cfg.addr_mask = MAKE_64BIT_MASK(0, cpu->cfg.addr_size); 267 268 mcc->parent_realize(dev, errp); 269 } 270 271 static void mb_cpu_initfn(Object *obj) 272 { 273 MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj); 274 CPUMBState *env = &cpu->env; 275 276 cpu_set_cpustate_pointers(cpu); 277 278 set_float_rounding_mode(float_round_nearest_even, &env->fp_status); 279 280 #ifndef CONFIG_USER_ONLY 281 /* Inbound IRQ and FIR lines */ 282 qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2); 283 qdev_init_gpio_in_named(DEVICE(cpu), mb_cpu_ns_axi_dp, "ns_axi_dp", 1); 284 qdev_init_gpio_in_named(DEVICE(cpu), mb_cpu_ns_axi_ip, "ns_axi_ip", 1); 285 qdev_init_gpio_in_named(DEVICE(cpu), mb_cpu_ns_axi_dc, "ns_axi_dc", 1); 286 qdev_init_gpio_in_named(DEVICE(cpu), mb_cpu_ns_axi_ic, "ns_axi_ic", 1); 287 #endif 288 } 289 290 static Property mb_properties[] = { 291 DEFINE_PROP_UINT32("base-vectors", MicroBlazeCPU, cfg.base_vectors, 0), 292 DEFINE_PROP_BOOL("use-stack-protection", MicroBlazeCPU, cfg.stackprot, 293 false), 294 /* 295 * This is the C_ADDR_SIZE synth-time configuration option of the 296 * MicroBlaze cores. Supported values range between 32 and 64. 297 * 298 * When set to > 32, 32bit MicroBlaze can emit load/stores 299 * with extended addressing. 300 */ 301 DEFINE_PROP_UINT8("addr-size", MicroBlazeCPU, cfg.addr_size, 32), 302 /* If use-fpu > 0 - FPU is enabled 303 * If use-fpu = 2 - Floating point conversion and square root instructions 304 * are enabled 305 */ 306 DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2), 307 /* If use-hw-mul > 0 - Multiplier is enabled 308 * If use-hw-mul = 2 - 64-bit multiplier is enabled 309 */ 310 DEFINE_PROP_UINT8("use-hw-mul", MicroBlazeCPU, cfg.use_hw_mul, 2), 311 DEFINE_PROP_BOOL("use-barrel", MicroBlazeCPU, cfg.use_barrel, true), 312 DEFINE_PROP_BOOL("use-div", MicroBlazeCPU, cfg.use_div, true), 313 DEFINE_PROP_BOOL("use-msr-instr", MicroBlazeCPU, cfg.use_msr_instr, true), 314 DEFINE_PROP_BOOL("use-pcmp-instr", MicroBlazeCPU, cfg.use_pcmp_instr, true), 315 DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true), 316 /* 317 * use-non-secure enables/disables the use of the non_secure[3:0] signals. 318 * It is a bitfield where 1 = non-secure for the following bits and their 319 * corresponding interfaces: 320 * 0x1 - M_AXI_DP 321 * 0x2 - M_AXI_IP 322 * 0x4 - M_AXI_DC 323 * 0x8 - M_AXI_IC 324 */ 325 DEFINE_PROP_UINT8("use-non-secure", MicroBlazeCPU, cfg.use_non_secure, 0), 326 DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback, 327 false), 328 DEFINE_PROP_BOOL("endianness", MicroBlazeCPU, cfg.endi, false), 329 /* Enables bus exceptions on failed data accesses (load/stores). */ 330 DEFINE_PROP_BOOL("dopb-bus-exception", MicroBlazeCPU, 331 cfg.dopb_bus_exception, false), 332 /* Enables bus exceptions on failed instruction fetches. */ 333 DEFINE_PROP_BOOL("iopb-bus-exception", MicroBlazeCPU, 334 cfg.iopb_bus_exception, false), 335 DEFINE_PROP_BOOL("ill-opcode-exception", MicroBlazeCPU, 336 cfg.illegal_opcode_exception, false), 337 DEFINE_PROP_BOOL("div-zero-exception", MicroBlazeCPU, 338 cfg.div_zero_exception, false), 339 DEFINE_PROP_BOOL("unaligned-exceptions", MicroBlazeCPU, 340 cfg.unaligned_exceptions, false), 341 DEFINE_PROP_BOOL("opcode-0x0-illegal", MicroBlazeCPU, 342 cfg.opcode_0_illegal, false), 343 DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version), 344 DEFINE_PROP_UINT8("pvr", MicroBlazeCPU, cfg.pvr, C_PVR_FULL), 345 DEFINE_PROP_UINT8("pvr-user1", MicroBlazeCPU, cfg.pvr_user1, 0), 346 DEFINE_PROP_UINT32("pvr-user2", MicroBlazeCPU, cfg.pvr_user2, 0), 347 DEFINE_PROP_END_OF_LIST(), 348 }; 349 350 static ObjectClass *mb_cpu_class_by_name(const char *cpu_model) 351 { 352 return object_class_by_name(TYPE_MICROBLAZE_CPU); 353 } 354 355 #ifndef CONFIG_USER_ONLY 356 #include "hw/core/sysemu-cpu-ops.h" 357 358 static const struct SysemuCPUOps mb_sysemu_ops = { 359 }; 360 #endif 361 362 #include "hw/core/tcg-cpu-ops.h" 363 364 static struct TCGCPUOps mb_tcg_ops = { 365 .initialize = mb_tcg_init, 366 .synchronize_from_tb = mb_cpu_synchronize_from_tb, 367 .cpu_exec_interrupt = mb_cpu_exec_interrupt, 368 .tlb_fill = mb_cpu_tlb_fill, 369 370 #ifndef CONFIG_USER_ONLY 371 .do_interrupt = mb_cpu_do_interrupt, 372 .do_transaction_failed = mb_cpu_transaction_failed, 373 .do_unaligned_access = mb_cpu_do_unaligned_access, 374 #endif /* !CONFIG_USER_ONLY */ 375 }; 376 377 static void mb_cpu_class_init(ObjectClass *oc, void *data) 378 { 379 DeviceClass *dc = DEVICE_CLASS(oc); 380 CPUClass *cc = CPU_CLASS(oc); 381 MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc); 382 383 device_class_set_parent_realize(dc, mb_cpu_realizefn, 384 &mcc->parent_realize); 385 device_class_set_parent_reset(dc, mb_cpu_reset, &mcc->parent_reset); 386 387 cc->class_by_name = mb_cpu_class_by_name; 388 cc->has_work = mb_cpu_has_work; 389 390 cc->dump_state = mb_cpu_dump_state; 391 cc->set_pc = mb_cpu_set_pc; 392 cc->gdb_read_register = mb_cpu_gdb_read_register; 393 cc->gdb_write_register = mb_cpu_gdb_write_register; 394 395 #ifndef CONFIG_USER_ONLY 396 cc->get_phys_page_attrs_debug = mb_cpu_get_phys_page_attrs_debug; 397 dc->vmsd = &vmstate_mb_cpu; 398 cc->sysemu_ops = &mb_sysemu_ops; 399 #endif 400 device_class_set_props(dc, mb_properties); 401 cc->gdb_num_core_regs = 32 + 27; 402 403 cc->disas_set_info = mb_disas_set_info; 404 cc->tcg_ops = &mb_tcg_ops; 405 } 406 407 static const TypeInfo mb_cpu_type_info = { 408 .name = TYPE_MICROBLAZE_CPU, 409 .parent = TYPE_CPU, 410 .instance_size = sizeof(MicroBlazeCPU), 411 .instance_init = mb_cpu_initfn, 412 .class_size = sizeof(MicroBlazeCPUClass), 413 .class_init = mb_cpu_class_init, 414 }; 415 416 static void mb_cpu_register_types(void) 417 { 418 type_register_static(&mb_cpu_type_info); 419 } 420 421 type_init(mb_cpu_register_types) 422