1 /* 2 * QEMU PC System Emulator 3 * 4 * Copyright (c) 2003-2004 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "hw/hw.h" 25 #include "hw/pc.h" 26 #include "hw/serial.h" 27 #include "hw/apic.h" 28 #include "hw/fdc.h" 29 #include "hw/ide.h" 30 #include "hw/pci/pci.h" 31 #include "monitor/monitor.h" 32 #include "hw/fw_cfg.h" 33 #include "hw/hpet_emul.h" 34 #include "hw/smbios.h" 35 #include "hw/loader.h" 36 #include "elf.h" 37 #include "hw/multiboot.h" 38 #include "hw/mc146818rtc.h" 39 #include "hw/i8254.h" 40 #include "hw/pcspk.h" 41 #include "hw/pci/msi.h" 42 #include "hw/sysbus.h" 43 #include "sysemu/sysemu.h" 44 #include "sysemu/kvm.h" 45 #include "kvm_i386.h" 46 #include "hw/xen.h" 47 #include "sysemu/blockdev.h" 48 #include "hw/block-common.h" 49 #include "ui/qemu-spice.h" 50 #include "exec/memory.h" 51 #include "exec/address-spaces.h" 52 #include "sysemu/arch_init.h" 53 #include "qemu/bitmap.h" 54 55 /* debug PC/ISA interrupts */ 56 //#define DEBUG_IRQ 57 58 #ifdef DEBUG_IRQ 59 #define DPRINTF(fmt, ...) \ 60 do { printf("CPUIRQ: " fmt , ## __VA_ARGS__); } while (0) 61 #else 62 #define DPRINTF(fmt, ...) 63 #endif 64 65 /* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables. */ 66 #define ACPI_DATA_SIZE 0x10000 67 #define BIOS_CFG_IOPORT 0x510 68 #define FW_CFG_ACPI_TABLES (FW_CFG_ARCH_LOCAL + 0) 69 #define FW_CFG_SMBIOS_ENTRIES (FW_CFG_ARCH_LOCAL + 1) 70 #define FW_CFG_IRQ0_OVERRIDE (FW_CFG_ARCH_LOCAL + 2) 71 #define FW_CFG_E820_TABLE (FW_CFG_ARCH_LOCAL + 3) 72 #define FW_CFG_HPET (FW_CFG_ARCH_LOCAL + 4) 73 74 #define E820_NR_ENTRIES 16 75 76 struct e820_entry { 77 uint64_t address; 78 uint64_t length; 79 uint32_t type; 80 } QEMU_PACKED __attribute((__aligned__(4))); 81 82 struct e820_table { 83 uint32_t count; 84 struct e820_entry entry[E820_NR_ENTRIES]; 85 } QEMU_PACKED __attribute((__aligned__(4))); 86 87 static struct e820_table e820_table; 88 struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX}; 89 90 void gsi_handler(void *opaque, int n, int level) 91 { 92 GSIState *s = opaque; 93 94 DPRINTF("pc: %s GSI %d\n", level ? "raising" : "lowering", n); 95 if (n < ISA_NUM_IRQS) { 96 qemu_set_irq(s->i8259_irq[n], level); 97 } 98 qemu_set_irq(s->ioapic_irq[n], level); 99 } 100 101 static void ioport80_write(void *opaque, hwaddr addr, uint64_t data, 102 unsigned size) 103 { 104 } 105 106 static uint64_t ioport80_read(void *opaque, hwaddr addr, unsigned size) 107 { 108 return 0xffffffffffffffffULL; 109 } 110 111 /* MSDOS compatibility mode FPU exception support */ 112 static qemu_irq ferr_irq; 113 114 void pc_register_ferr_irq(qemu_irq irq) 115 { 116 ferr_irq = irq; 117 } 118 119 /* XXX: add IGNNE support */ 120 void cpu_set_ferr(CPUX86State *s) 121 { 122 qemu_irq_raise(ferr_irq); 123 } 124 125 static void ioportF0_write(void *opaque, hwaddr addr, uint64_t data, 126 unsigned size) 127 { 128 qemu_irq_lower(ferr_irq); 129 } 130 131 static uint64_t ioportF0_read(void *opaque, hwaddr addr, unsigned size) 132 { 133 return 0xffffffffffffffffULL; 134 } 135 136 /* TSC handling */ 137 uint64_t cpu_get_tsc(CPUX86State *env) 138 { 139 return cpu_get_ticks(); 140 } 141 142 /* SMM support */ 143 144 static cpu_set_smm_t smm_set; 145 static void *smm_arg; 146 147 void cpu_smm_register(cpu_set_smm_t callback, void *arg) 148 { 149 assert(smm_set == NULL); 150 assert(smm_arg == NULL); 151 smm_set = callback; 152 smm_arg = arg; 153 } 154 155 void cpu_smm_update(CPUX86State *env) 156 { 157 if (smm_set && smm_arg && env == first_cpu) 158 smm_set(!!(env->hflags & HF_SMM_MASK), smm_arg); 159 } 160 161 162 /* IRQ handling */ 163 int cpu_get_pic_interrupt(CPUX86State *env) 164 { 165 int intno; 166 167 intno = apic_get_interrupt(env->apic_state); 168 if (intno >= 0) { 169 return intno; 170 } 171 /* read the irq from the PIC */ 172 if (!apic_accept_pic_intr(env->apic_state)) { 173 return -1; 174 } 175 176 intno = pic_read_irq(isa_pic); 177 return intno; 178 } 179 180 static void pic_irq_request(void *opaque, int irq, int level) 181 { 182 CPUX86State *env = first_cpu; 183 184 DPRINTF("pic_irqs: %s irq %d\n", level? "raise" : "lower", irq); 185 if (env->apic_state) { 186 while (env) { 187 if (apic_accept_pic_intr(env->apic_state)) { 188 apic_deliver_pic_intr(env->apic_state, level); 189 } 190 env = env->next_cpu; 191 } 192 } else { 193 CPUState *cs = CPU(x86_env_get_cpu(env)); 194 if (level) { 195 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 196 } else { 197 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 198 } 199 } 200 } 201 202 /* PC cmos mappings */ 203 204 #define REG_EQUIPMENT_BYTE 0x14 205 206 static int cmos_get_fd_drive_type(FDriveType fd0) 207 { 208 int val; 209 210 switch (fd0) { 211 case FDRIVE_DRV_144: 212 /* 1.44 Mb 3"5 drive */ 213 val = 4; 214 break; 215 case FDRIVE_DRV_288: 216 /* 2.88 Mb 3"5 drive */ 217 val = 5; 218 break; 219 case FDRIVE_DRV_120: 220 /* 1.2 Mb 5"5 drive */ 221 val = 2; 222 break; 223 case FDRIVE_DRV_NONE: 224 default: 225 val = 0; 226 break; 227 } 228 return val; 229 } 230 231 static void cmos_init_hd(ISADevice *s, int type_ofs, int info_ofs, 232 int16_t cylinders, int8_t heads, int8_t sectors) 233 { 234 rtc_set_memory(s, type_ofs, 47); 235 rtc_set_memory(s, info_ofs, cylinders); 236 rtc_set_memory(s, info_ofs + 1, cylinders >> 8); 237 rtc_set_memory(s, info_ofs + 2, heads); 238 rtc_set_memory(s, info_ofs + 3, 0xff); 239 rtc_set_memory(s, info_ofs + 4, 0xff); 240 rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3)); 241 rtc_set_memory(s, info_ofs + 6, cylinders); 242 rtc_set_memory(s, info_ofs + 7, cylinders >> 8); 243 rtc_set_memory(s, info_ofs + 8, sectors); 244 } 245 246 /* convert boot_device letter to something recognizable by the bios */ 247 static int boot_device2nibble(char boot_device) 248 { 249 switch(boot_device) { 250 case 'a': 251 case 'b': 252 return 0x01; /* floppy boot */ 253 case 'c': 254 return 0x02; /* hard drive boot */ 255 case 'd': 256 return 0x03; /* CD-ROM boot */ 257 case 'n': 258 return 0x04; /* Network boot */ 259 } 260 return 0; 261 } 262 263 static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk) 264 { 265 #define PC_MAX_BOOT_DEVICES 3 266 int nbds, bds[3] = { 0, }; 267 int i; 268 269 nbds = strlen(boot_device); 270 if (nbds > PC_MAX_BOOT_DEVICES) { 271 error_report("Too many boot devices for PC"); 272 return(1); 273 } 274 for (i = 0; i < nbds; i++) { 275 bds[i] = boot_device2nibble(boot_device[i]); 276 if (bds[i] == 0) { 277 error_report("Invalid boot device for PC: '%c'", 278 boot_device[i]); 279 return(1); 280 } 281 } 282 rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]); 283 rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ? 0x0 : 0x1)); 284 return(0); 285 } 286 287 static int pc_boot_set(void *opaque, const char *boot_device) 288 { 289 return set_boot_dev(opaque, boot_device, 0); 290 } 291 292 typedef struct pc_cmos_init_late_arg { 293 ISADevice *rtc_state; 294 BusState *idebus[2]; 295 } pc_cmos_init_late_arg; 296 297 static void pc_cmos_init_late(void *opaque) 298 { 299 pc_cmos_init_late_arg *arg = opaque; 300 ISADevice *s = arg->rtc_state; 301 int16_t cylinders; 302 int8_t heads, sectors; 303 int val; 304 int i, trans; 305 306 val = 0; 307 if (ide_get_geometry(arg->idebus[0], 0, 308 &cylinders, &heads, §ors) >= 0) { 309 cmos_init_hd(s, 0x19, 0x1b, cylinders, heads, sectors); 310 val |= 0xf0; 311 } 312 if (ide_get_geometry(arg->idebus[0], 1, 313 &cylinders, &heads, §ors) >= 0) { 314 cmos_init_hd(s, 0x1a, 0x24, cylinders, heads, sectors); 315 val |= 0x0f; 316 } 317 rtc_set_memory(s, 0x12, val); 318 319 val = 0; 320 for (i = 0; i < 4; i++) { 321 /* NOTE: ide_get_geometry() returns the physical 322 geometry. It is always such that: 1 <= sects <= 63, 1 323 <= heads <= 16, 1 <= cylinders <= 16383. The BIOS 324 geometry can be different if a translation is done. */ 325 if (ide_get_geometry(arg->idebus[i / 2], i % 2, 326 &cylinders, &heads, §ors) >= 0) { 327 trans = ide_get_bios_chs_trans(arg->idebus[i / 2], i % 2) - 1; 328 assert((trans & ~3) == 0); 329 val |= trans << (i * 2); 330 } 331 } 332 rtc_set_memory(s, 0x39, val); 333 334 qemu_unregister_reset(pc_cmos_init_late, opaque); 335 } 336 337 void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size, 338 const char *boot_device, 339 ISADevice *floppy, BusState *idebus0, BusState *idebus1, 340 ISADevice *s) 341 { 342 int val, nb, i; 343 FDriveType fd_type[2] = { FDRIVE_DRV_NONE, FDRIVE_DRV_NONE }; 344 static pc_cmos_init_late_arg arg; 345 346 /* various important CMOS locations needed by PC/Bochs bios */ 347 348 /* memory size */ 349 /* base memory (first MiB) */ 350 val = MIN(ram_size / 1024, 640); 351 rtc_set_memory(s, 0x15, val); 352 rtc_set_memory(s, 0x16, val >> 8); 353 /* extended memory (next 64MiB) */ 354 if (ram_size > 1024 * 1024) { 355 val = (ram_size - 1024 * 1024) / 1024; 356 } else { 357 val = 0; 358 } 359 if (val > 65535) 360 val = 65535; 361 rtc_set_memory(s, 0x17, val); 362 rtc_set_memory(s, 0x18, val >> 8); 363 rtc_set_memory(s, 0x30, val); 364 rtc_set_memory(s, 0x31, val >> 8); 365 /* memory between 16MiB and 4GiB */ 366 if (ram_size > 16 * 1024 * 1024) { 367 val = (ram_size - 16 * 1024 * 1024) / 65536; 368 } else { 369 val = 0; 370 } 371 if (val > 65535) 372 val = 65535; 373 rtc_set_memory(s, 0x34, val); 374 rtc_set_memory(s, 0x35, val >> 8); 375 /* memory above 4GiB */ 376 val = above_4g_mem_size / 65536; 377 rtc_set_memory(s, 0x5b, val); 378 rtc_set_memory(s, 0x5c, val >> 8); 379 rtc_set_memory(s, 0x5d, val >> 16); 380 381 /* set the number of CPU */ 382 rtc_set_memory(s, 0x5f, smp_cpus - 1); 383 384 /* set boot devices, and disable floppy signature check if requested */ 385 if (set_boot_dev(s, boot_device, fd_bootchk)) { 386 exit(1); 387 } 388 389 /* floppy type */ 390 if (floppy) { 391 for (i = 0; i < 2; i++) { 392 fd_type[i] = isa_fdc_get_drive_type(floppy, i); 393 } 394 } 395 val = (cmos_get_fd_drive_type(fd_type[0]) << 4) | 396 cmos_get_fd_drive_type(fd_type[1]); 397 rtc_set_memory(s, 0x10, val); 398 399 val = 0; 400 nb = 0; 401 if (fd_type[0] < FDRIVE_DRV_NONE) { 402 nb++; 403 } 404 if (fd_type[1] < FDRIVE_DRV_NONE) { 405 nb++; 406 } 407 switch (nb) { 408 case 0: 409 break; 410 case 1: 411 val |= 0x01; /* 1 drive, ready for boot */ 412 break; 413 case 2: 414 val |= 0x41; /* 2 drives, ready for boot */ 415 break; 416 } 417 val |= 0x02; /* FPU is there */ 418 val |= 0x04; /* PS/2 mouse installed */ 419 rtc_set_memory(s, REG_EQUIPMENT_BYTE, val); 420 421 /* hard drives */ 422 arg.rtc_state = s; 423 arg.idebus[0] = idebus0; 424 arg.idebus[1] = idebus1; 425 qemu_register_reset(pc_cmos_init_late, &arg); 426 } 427 428 /* port 92 stuff: could be split off */ 429 typedef struct Port92State { 430 ISADevice dev; 431 MemoryRegion io; 432 uint8_t outport; 433 qemu_irq *a20_out; 434 } Port92State; 435 436 static void port92_write(void *opaque, hwaddr addr, uint64_t val, 437 unsigned size) 438 { 439 Port92State *s = opaque; 440 441 DPRINTF("port92: write 0x%02x\n", val); 442 s->outport = val; 443 qemu_set_irq(*s->a20_out, (val >> 1) & 1); 444 if (val & 1) { 445 qemu_system_reset_request(); 446 } 447 } 448 449 static uint64_t port92_read(void *opaque, hwaddr addr, 450 unsigned size) 451 { 452 Port92State *s = opaque; 453 uint32_t ret; 454 455 ret = s->outport; 456 DPRINTF("port92: read 0x%02x\n", ret); 457 return ret; 458 } 459 460 static void port92_init(ISADevice *dev, qemu_irq *a20_out) 461 { 462 Port92State *s = DO_UPCAST(Port92State, dev, dev); 463 464 s->a20_out = a20_out; 465 } 466 467 static const VMStateDescription vmstate_port92_isa = { 468 .name = "port92", 469 .version_id = 1, 470 .minimum_version_id = 1, 471 .minimum_version_id_old = 1, 472 .fields = (VMStateField []) { 473 VMSTATE_UINT8(outport, Port92State), 474 VMSTATE_END_OF_LIST() 475 } 476 }; 477 478 static void port92_reset(DeviceState *d) 479 { 480 Port92State *s = container_of(d, Port92State, dev.qdev); 481 482 s->outport &= ~1; 483 } 484 485 static const MemoryRegionOps port92_ops = { 486 .read = port92_read, 487 .write = port92_write, 488 .impl = { 489 .min_access_size = 1, 490 .max_access_size = 1, 491 }, 492 .endianness = DEVICE_LITTLE_ENDIAN, 493 }; 494 495 static int port92_initfn(ISADevice *dev) 496 { 497 Port92State *s = DO_UPCAST(Port92State, dev, dev); 498 499 memory_region_init_io(&s->io, &port92_ops, s, "port92", 1); 500 isa_register_ioport(dev, &s->io, 0x92); 501 502 s->outport = 0; 503 return 0; 504 } 505 506 static void port92_class_initfn(ObjectClass *klass, void *data) 507 { 508 DeviceClass *dc = DEVICE_CLASS(klass); 509 ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); 510 ic->init = port92_initfn; 511 dc->no_user = 1; 512 dc->reset = port92_reset; 513 dc->vmsd = &vmstate_port92_isa; 514 } 515 516 static const TypeInfo port92_info = { 517 .name = "port92", 518 .parent = TYPE_ISA_DEVICE, 519 .instance_size = sizeof(Port92State), 520 .class_init = port92_class_initfn, 521 }; 522 523 static void port92_register_types(void) 524 { 525 type_register_static(&port92_info); 526 } 527 528 type_init(port92_register_types) 529 530 static void handle_a20_line_change(void *opaque, int irq, int level) 531 { 532 X86CPU *cpu = opaque; 533 534 /* XXX: send to all CPUs ? */ 535 /* XXX: add logic to handle multiple A20 line sources */ 536 x86_cpu_set_a20(cpu, level); 537 } 538 539 int e820_add_entry(uint64_t address, uint64_t length, uint32_t type) 540 { 541 int index = le32_to_cpu(e820_table.count); 542 struct e820_entry *entry; 543 544 if (index >= E820_NR_ENTRIES) 545 return -EBUSY; 546 entry = &e820_table.entry[index++]; 547 548 entry->address = cpu_to_le64(address); 549 entry->length = cpu_to_le64(length); 550 entry->type = cpu_to_le32(type); 551 552 e820_table.count = cpu_to_le32(index); 553 return index; 554 } 555 556 /* Calculates the limit to CPU APIC ID values 557 * 558 * This function returns the limit for the APIC ID value, so that all 559 * CPU APIC IDs are < pc_apic_id_limit(). 560 * 561 * This is used for FW_CFG_MAX_CPUS. See comments on bochs_bios_init(). 562 */ 563 static unsigned int pc_apic_id_limit(unsigned int max_cpus) 564 { 565 return x86_cpu_apic_id_from_index(max_cpus - 1) + 1; 566 } 567 568 static void *bochs_bios_init(void) 569 { 570 void *fw_cfg; 571 uint8_t *smbios_table; 572 size_t smbios_len; 573 uint64_t *numa_fw_cfg; 574 int i, j; 575 unsigned int apic_id_limit = pc_apic_id_limit(max_cpus); 576 577 fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0); 578 /* FW_CFG_MAX_CPUS is a bit confusing/problematic on x86: 579 * 580 * SeaBIOS needs FW_CFG_MAX_CPUS for CPU hotplug, but the CPU hotplug 581 * QEMU<->SeaBIOS interface is not based on the "CPU index", but on the APIC 582 * ID of hotplugged CPUs[1]. This means that FW_CFG_MAX_CPUS is not the 583 * "maximum number of CPUs", but the "limit to the APIC ID values SeaBIOS 584 * may see". 585 * 586 * So, this means we must not use max_cpus, here, but the maximum possible 587 * APIC ID value, plus one. 588 * 589 * [1] The only kind of "CPU identifier" used between SeaBIOS and QEMU is 590 * the APIC ID, not the "CPU index" 591 */ 592 fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)apic_id_limit); 593 fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1); 594 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size); 595 fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES, 596 acpi_tables, acpi_tables_len); 597 fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override()); 598 599 smbios_table = smbios_get_table(&smbios_len); 600 if (smbios_table) 601 fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES, 602 smbios_table, smbios_len); 603 fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, 604 &e820_table, sizeof(e820_table)); 605 606 fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, &hpet_cfg, sizeof(hpet_cfg)); 607 /* allocate memory for the NUMA channel: one (64bit) word for the number 608 * of nodes, one word for each VCPU->node and one word for each node to 609 * hold the amount of memory. 610 */ 611 numa_fw_cfg = g_new0(uint64_t, 1 + apic_id_limit + nb_numa_nodes); 612 numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes); 613 for (i = 0; i < max_cpus; i++) { 614 unsigned int apic_id = x86_cpu_apic_id_from_index(i); 615 assert(apic_id < apic_id_limit); 616 for (j = 0; j < nb_numa_nodes; j++) { 617 if (test_bit(i, node_cpumask[j])) { 618 numa_fw_cfg[apic_id + 1] = cpu_to_le64(j); 619 break; 620 } 621 } 622 } 623 for (i = 0; i < nb_numa_nodes; i++) { 624 numa_fw_cfg[apic_id_limit + 1 + i] = cpu_to_le64(node_mem[i]); 625 } 626 fw_cfg_add_bytes(fw_cfg, FW_CFG_NUMA, numa_fw_cfg, 627 (1 + apic_id_limit + nb_numa_nodes) * 628 sizeof(*numa_fw_cfg)); 629 630 return fw_cfg; 631 } 632 633 static long get_file_size(FILE *f) 634 { 635 long where, size; 636 637 /* XXX: on Unix systems, using fstat() probably makes more sense */ 638 639 where = ftell(f); 640 fseek(f, 0, SEEK_END); 641 size = ftell(f); 642 fseek(f, where, SEEK_SET); 643 644 return size; 645 } 646 647 static void load_linux(void *fw_cfg, 648 const char *kernel_filename, 649 const char *initrd_filename, 650 const char *kernel_cmdline, 651 hwaddr max_ram_size) 652 { 653 uint16_t protocol; 654 int setup_size, kernel_size, initrd_size = 0, cmdline_size; 655 uint32_t initrd_max; 656 uint8_t header[8192], *setup, *kernel, *initrd_data; 657 hwaddr real_addr, prot_addr, cmdline_addr, initrd_addr = 0; 658 FILE *f; 659 char *vmode; 660 661 /* Align to 16 bytes as a paranoia measure */ 662 cmdline_size = (strlen(kernel_cmdline)+16) & ~15; 663 664 /* load the kernel header */ 665 f = fopen(kernel_filename, "rb"); 666 if (!f || !(kernel_size = get_file_size(f)) || 667 fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) != 668 MIN(ARRAY_SIZE(header), kernel_size)) { 669 fprintf(stderr, "qemu: could not load kernel '%s': %s\n", 670 kernel_filename, strerror(errno)); 671 exit(1); 672 } 673 674 /* kernel protocol version */ 675 #if 0 676 fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202)); 677 #endif 678 if (ldl_p(header+0x202) == 0x53726448) { 679 protocol = lduw_p(header+0x206); 680 } else { 681 /* This looks like a multiboot kernel. If it is, let's stop 682 treating it like a Linux kernel. */ 683 if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename, 684 kernel_cmdline, kernel_size, header)) { 685 return; 686 } 687 protocol = 0; 688 } 689 690 if (protocol < 0x200 || !(header[0x211] & 0x01)) { 691 /* Low kernel */ 692 real_addr = 0x90000; 693 cmdline_addr = 0x9a000 - cmdline_size; 694 prot_addr = 0x10000; 695 } else if (protocol < 0x202) { 696 /* High but ancient kernel */ 697 real_addr = 0x90000; 698 cmdline_addr = 0x9a000 - cmdline_size; 699 prot_addr = 0x100000; 700 } else { 701 /* High and recent kernel */ 702 real_addr = 0x10000; 703 cmdline_addr = 0x20000; 704 prot_addr = 0x100000; 705 } 706 707 #if 0 708 fprintf(stderr, 709 "qemu: real_addr = 0x" TARGET_FMT_plx "\n" 710 "qemu: cmdline_addr = 0x" TARGET_FMT_plx "\n" 711 "qemu: prot_addr = 0x" TARGET_FMT_plx "\n", 712 real_addr, 713 cmdline_addr, 714 prot_addr); 715 #endif 716 717 /* highest address for loading the initrd */ 718 if (protocol >= 0x203) { 719 initrd_max = ldl_p(header+0x22c); 720 } else { 721 initrd_max = 0x37ffffff; 722 } 723 724 if (initrd_max >= max_ram_size-ACPI_DATA_SIZE) 725 initrd_max = max_ram_size-ACPI_DATA_SIZE-1; 726 727 fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr); 728 fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(kernel_cmdline)+1); 729 fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline); 730 731 if (protocol >= 0x202) { 732 stl_p(header+0x228, cmdline_addr); 733 } else { 734 stw_p(header+0x20, 0xA33F); 735 stw_p(header+0x22, cmdline_addr-real_addr); 736 } 737 738 /* handle vga= parameter */ 739 vmode = strstr(kernel_cmdline, "vga="); 740 if (vmode) { 741 unsigned int video_mode; 742 /* skip "vga=" */ 743 vmode += 4; 744 if (!strncmp(vmode, "normal", 6)) { 745 video_mode = 0xffff; 746 } else if (!strncmp(vmode, "ext", 3)) { 747 video_mode = 0xfffe; 748 } else if (!strncmp(vmode, "ask", 3)) { 749 video_mode = 0xfffd; 750 } else { 751 video_mode = strtol(vmode, NULL, 0); 752 } 753 stw_p(header+0x1fa, video_mode); 754 } 755 756 /* loader type */ 757 /* High nybble = B reserved for QEMU; low nybble is revision number. 758 If this code is substantially changed, you may want to consider 759 incrementing the revision. */ 760 if (protocol >= 0x200) { 761 header[0x210] = 0xB0; 762 } 763 /* heap */ 764 if (protocol >= 0x201) { 765 header[0x211] |= 0x80; /* CAN_USE_HEAP */ 766 stw_p(header+0x224, cmdline_addr-real_addr-0x200); 767 } 768 769 /* load initrd */ 770 if (initrd_filename) { 771 if (protocol < 0x200) { 772 fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n"); 773 exit(1); 774 } 775 776 initrd_size = get_image_size(initrd_filename); 777 if (initrd_size < 0) { 778 fprintf(stderr, "qemu: error reading initrd %s\n", 779 initrd_filename); 780 exit(1); 781 } 782 783 initrd_addr = (initrd_max-initrd_size) & ~4095; 784 785 initrd_data = g_malloc(initrd_size); 786 load_image(initrd_filename, initrd_data); 787 788 fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr); 789 fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size); 790 fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data, initrd_size); 791 792 stl_p(header+0x218, initrd_addr); 793 stl_p(header+0x21c, initrd_size); 794 } 795 796 /* load kernel and setup */ 797 setup_size = header[0x1f1]; 798 if (setup_size == 0) { 799 setup_size = 4; 800 } 801 setup_size = (setup_size+1)*512; 802 kernel_size -= setup_size; 803 804 setup = g_malloc(setup_size); 805 kernel = g_malloc(kernel_size); 806 fseek(f, 0, SEEK_SET); 807 if (fread(setup, 1, setup_size, f) != setup_size) { 808 fprintf(stderr, "fread() failed\n"); 809 exit(1); 810 } 811 if (fread(kernel, 1, kernel_size, f) != kernel_size) { 812 fprintf(stderr, "fread() failed\n"); 813 exit(1); 814 } 815 fclose(f); 816 memcpy(setup, header, MIN(sizeof(header), setup_size)); 817 818 fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr); 819 fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size); 820 fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size); 821 822 fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr); 823 fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size); 824 fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size); 825 826 option_rom[nb_option_roms].name = "linuxboot.bin"; 827 option_rom[nb_option_roms].bootindex = 0; 828 nb_option_roms++; 829 } 830 831 #define NE2000_NB_MAX 6 832 833 static const int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 834 0x280, 0x380 }; 835 static const int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 }; 836 837 static const int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc }; 838 static const int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 }; 839 840 void pc_init_ne2k_isa(ISABus *bus, NICInfo *nd) 841 { 842 static int nb_ne2k = 0; 843 844 if (nb_ne2k == NE2000_NB_MAX) 845 return; 846 isa_ne2000_init(bus, ne2000_io[nb_ne2k], 847 ne2000_irq[nb_ne2k], nd); 848 nb_ne2k++; 849 } 850 851 DeviceState *cpu_get_current_apic(void) 852 { 853 if (cpu_single_env) { 854 return cpu_single_env->apic_state; 855 } else { 856 return NULL; 857 } 858 } 859 860 void pc_acpi_smi_interrupt(void *opaque, int irq, int level) 861 { 862 X86CPU *cpu = opaque; 863 864 if (level) { 865 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 866 } 867 } 868 869 void pc_cpus_init(const char *cpu_model) 870 { 871 int i; 872 873 /* init CPUs */ 874 if (cpu_model == NULL) { 875 #ifdef TARGET_X86_64 876 cpu_model = "qemu64"; 877 #else 878 cpu_model = "qemu32"; 879 #endif 880 } 881 882 for (i = 0; i < smp_cpus; i++) { 883 if (!cpu_x86_init(cpu_model)) { 884 exit(1); 885 } 886 } 887 } 888 889 void pc_acpi_init(const char *default_dsdt) 890 { 891 char *filename = NULL, *arg = NULL; 892 893 if (acpi_tables != NULL) { 894 /* manually set via -acpitable, leave it alone */ 895 return; 896 } 897 898 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, default_dsdt); 899 if (filename == NULL) { 900 fprintf(stderr, "WARNING: failed to find %s\n", default_dsdt); 901 return; 902 } 903 904 arg = g_strdup_printf("file=%s", filename); 905 if (acpi_table_add(arg) != 0) { 906 fprintf(stderr, "WARNING: failed to load %s\n", filename); 907 } 908 g_free(arg); 909 g_free(filename); 910 } 911 912 void *pc_memory_init(MemoryRegion *system_memory, 913 const char *kernel_filename, 914 const char *kernel_cmdline, 915 const char *initrd_filename, 916 ram_addr_t below_4g_mem_size, 917 ram_addr_t above_4g_mem_size, 918 MemoryRegion *rom_memory, 919 MemoryRegion **ram_memory) 920 { 921 int linux_boot, i; 922 MemoryRegion *ram, *option_rom_mr; 923 MemoryRegion *ram_below_4g, *ram_above_4g; 924 void *fw_cfg; 925 926 linux_boot = (kernel_filename != NULL); 927 928 /* Allocate RAM. We allocate it as a single memory region and use 929 * aliases to address portions of it, mostly for backwards compatibility 930 * with older qemus that used qemu_ram_alloc(). 931 */ 932 ram = g_malloc(sizeof(*ram)); 933 memory_region_init_ram(ram, "pc.ram", 934 below_4g_mem_size + above_4g_mem_size); 935 vmstate_register_ram_global(ram); 936 *ram_memory = ram; 937 ram_below_4g = g_malloc(sizeof(*ram_below_4g)); 938 memory_region_init_alias(ram_below_4g, "ram-below-4g", ram, 939 0, below_4g_mem_size); 940 memory_region_add_subregion(system_memory, 0, ram_below_4g); 941 if (above_4g_mem_size > 0) { 942 ram_above_4g = g_malloc(sizeof(*ram_above_4g)); 943 memory_region_init_alias(ram_above_4g, "ram-above-4g", ram, 944 below_4g_mem_size, above_4g_mem_size); 945 memory_region_add_subregion(system_memory, 0x100000000ULL, 946 ram_above_4g); 947 } 948 949 950 /* Initialize PC system firmware */ 951 pc_system_firmware_init(rom_memory); 952 953 option_rom_mr = g_malloc(sizeof(*option_rom_mr)); 954 memory_region_init_ram(option_rom_mr, "pc.rom", PC_ROM_SIZE); 955 vmstate_register_ram_global(option_rom_mr); 956 memory_region_add_subregion_overlap(rom_memory, 957 PC_ROM_MIN_VGA, 958 option_rom_mr, 959 1); 960 961 fw_cfg = bochs_bios_init(); 962 rom_set_fw(fw_cfg); 963 964 if (linux_boot) { 965 load_linux(fw_cfg, kernel_filename, initrd_filename, kernel_cmdline, below_4g_mem_size); 966 } 967 968 for (i = 0; i < nb_option_roms; i++) { 969 rom_add_option(option_rom[i].name, option_rom[i].bootindex); 970 } 971 return fw_cfg; 972 } 973 974 qemu_irq *pc_allocate_cpu_irq(void) 975 { 976 return qemu_allocate_irqs(pic_irq_request, NULL, 1); 977 } 978 979 DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus) 980 { 981 DeviceState *dev = NULL; 982 983 if (pci_bus) { 984 PCIDevice *pcidev = pci_vga_init(pci_bus); 985 dev = pcidev ? &pcidev->qdev : NULL; 986 } else if (isa_bus) { 987 ISADevice *isadev = isa_vga_init(isa_bus); 988 dev = isadev ? &isadev->qdev : NULL; 989 } 990 return dev; 991 } 992 993 static void cpu_request_exit(void *opaque, int irq, int level) 994 { 995 CPUX86State *env = cpu_single_env; 996 997 if (env && level) { 998 cpu_exit(env); 999 } 1000 } 1001 1002 static const MemoryRegionOps ioport80_io_ops = { 1003 .write = ioport80_write, 1004 .read = ioport80_read, 1005 .endianness = DEVICE_NATIVE_ENDIAN, 1006 .impl = { 1007 .min_access_size = 1, 1008 .max_access_size = 1, 1009 }, 1010 }; 1011 1012 static const MemoryRegionOps ioportF0_io_ops = { 1013 .write = ioportF0_write, 1014 .read = ioportF0_read, 1015 .endianness = DEVICE_NATIVE_ENDIAN, 1016 .impl = { 1017 .min_access_size = 1, 1018 .max_access_size = 1, 1019 }, 1020 }; 1021 1022 void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi, 1023 ISADevice **rtc_state, 1024 ISADevice **floppy, 1025 bool no_vmport) 1026 { 1027 int i; 1028 DriveInfo *fd[MAX_FD]; 1029 DeviceState *hpet = NULL; 1030 int pit_isa_irq = 0; 1031 qemu_irq pit_alt_irq = NULL; 1032 qemu_irq rtc_irq = NULL; 1033 qemu_irq *a20_line; 1034 ISADevice *i8042, *port92, *vmmouse, *pit = NULL; 1035 qemu_irq *cpu_exit_irq; 1036 MemoryRegion *ioport80_io = g_new(MemoryRegion, 1); 1037 MemoryRegion *ioportF0_io = g_new(MemoryRegion, 1); 1038 1039 memory_region_init_io(ioport80_io, &ioport80_io_ops, NULL, "ioport80", 1); 1040 memory_region_add_subregion(isa_bus->address_space_io, 0x80, ioport80_io); 1041 1042 memory_region_init_io(ioportF0_io, &ioportF0_io_ops, NULL, "ioportF0", 1); 1043 memory_region_add_subregion(isa_bus->address_space_io, 0xf0, ioportF0_io); 1044 1045 /* 1046 * Check if an HPET shall be created. 1047 * 1048 * Without KVM_CAP_PIT_STATE2, we cannot switch off the in-kernel PIT 1049 * when the HPET wants to take over. Thus we have to disable the latter. 1050 */ 1051 if (!no_hpet && (!kvm_irqchip_in_kernel() || kvm_has_pit_state2())) { 1052 hpet = sysbus_try_create_simple("hpet", HPET_BASE, NULL); 1053 1054 if (hpet) { 1055 for (i = 0; i < GSI_NUM_PINS; i++) { 1056 sysbus_connect_irq(SYS_BUS_DEVICE(hpet), i, gsi[i]); 1057 } 1058 pit_isa_irq = -1; 1059 pit_alt_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_PIT_INT); 1060 rtc_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_RTC_INT); 1061 } 1062 } 1063 *rtc_state = rtc_init(isa_bus, 2000, rtc_irq); 1064 1065 qemu_register_boot_set(pc_boot_set, *rtc_state); 1066 1067 if (!xen_enabled()) { 1068 if (kvm_irqchip_in_kernel()) { 1069 pit = kvm_pit_init(isa_bus, 0x40); 1070 } else { 1071 pit = pit_init(isa_bus, 0x40, pit_isa_irq, pit_alt_irq); 1072 } 1073 if (hpet) { 1074 /* connect PIT to output control line of the HPET */ 1075 qdev_connect_gpio_out(hpet, 0, qdev_get_gpio_in(&pit->qdev, 0)); 1076 } 1077 pcspk_init(isa_bus, pit); 1078 } 1079 1080 for(i = 0; i < MAX_SERIAL_PORTS; i++) { 1081 if (serial_hds[i]) { 1082 serial_isa_init(isa_bus, i, serial_hds[i]); 1083 } 1084 } 1085 1086 for(i = 0; i < MAX_PARALLEL_PORTS; i++) { 1087 if (parallel_hds[i]) { 1088 parallel_init(isa_bus, i, parallel_hds[i]); 1089 } 1090 } 1091 1092 a20_line = qemu_allocate_irqs(handle_a20_line_change, 1093 x86_env_get_cpu(first_cpu), 2); 1094 i8042 = isa_create_simple(isa_bus, "i8042"); 1095 i8042_setup_a20_line(i8042, &a20_line[0]); 1096 if (!no_vmport) { 1097 vmport_init(isa_bus); 1098 vmmouse = isa_try_create(isa_bus, "vmmouse"); 1099 } else { 1100 vmmouse = NULL; 1101 } 1102 if (vmmouse) { 1103 qdev_prop_set_ptr(&vmmouse->qdev, "ps2_mouse", i8042); 1104 qdev_init_nofail(&vmmouse->qdev); 1105 } 1106 port92 = isa_create_simple(isa_bus, "port92"); 1107 port92_init(port92, &a20_line[1]); 1108 1109 cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1); 1110 DMA_init(0, cpu_exit_irq); 1111 1112 for(i = 0; i < MAX_FD; i++) { 1113 fd[i] = drive_get(IF_FLOPPY, 0, i); 1114 } 1115 *floppy = fdctrl_init_isa(isa_bus, fd); 1116 } 1117 1118 void pc_nic_init(ISABus *isa_bus, PCIBus *pci_bus) 1119 { 1120 int i; 1121 1122 for (i = 0; i < nb_nics; i++) { 1123 NICInfo *nd = &nd_table[i]; 1124 1125 if (!pci_bus || (nd->model && strcmp(nd->model, "ne2k_isa") == 0)) { 1126 pc_init_ne2k_isa(isa_bus, nd); 1127 } else { 1128 pci_nic_init_nofail(nd, "e1000", NULL); 1129 } 1130 } 1131 } 1132 1133 void pc_pci_device_init(PCIBus *pci_bus) 1134 { 1135 int max_bus; 1136 int bus; 1137 1138 max_bus = drive_get_max_bus(IF_SCSI); 1139 for (bus = 0; bus <= max_bus; bus++) { 1140 pci_create_simple(pci_bus, -1, "lsi53c895a"); 1141 } 1142 } 1143 1144 void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name) 1145 { 1146 DeviceState *dev; 1147 SysBusDevice *d; 1148 unsigned int i; 1149 1150 if (kvm_irqchip_in_kernel()) { 1151 dev = qdev_create(NULL, "kvm-ioapic"); 1152 } else { 1153 dev = qdev_create(NULL, "ioapic"); 1154 } 1155 if (parent_name) { 1156 object_property_add_child(object_resolve_path(parent_name, NULL), 1157 "ioapic", OBJECT(dev), NULL); 1158 } 1159 qdev_init_nofail(dev); 1160 d = SYS_BUS_DEVICE(dev); 1161 sysbus_mmio_map(d, 0, 0xfec00000); 1162 1163 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 1164 gsi_state->ioapic_irq[i] = qdev_get_gpio_in(dev, i); 1165 } 1166 } 1167