hw/pc.c

   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.h"
  25 #include "pc.h"
  26 #include "serial.h"
  27 #include "apic.h"
  28 #include "fdc.h"
  29 #include "ide.h"
  30 #include "pci/pci.h"
  31 #include "monitor/monitor.h"
  32 #include "fw_cfg.h"
  33 #include "hpet_emul.h"
  34 #include "smbios.h"
  35 #include "loader.h"
  36 #include "elf.h"
  37 #include "multiboot.h"
  38 #include "mc146818rtc.h"
  39 #include "i8254.h"
  40 #include "pcspk.h"
  41 #include "pci/msi.h"
  42 #include "sysbus.h"
  43 #include "sysemu/sysemu.h"
  44 #include "sysemu/kvm.h"
  45 #include "kvm_i386.h"
  46 #include "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         if (level)
 194             cpu_interrupt(env, CPU_INTERRUPT_HARD);
 195         else
 196             cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
 197     }
 198 }
 199
 200 /* PC cmos mappings */
 201
 202 #define REG_EQUIPMENT_BYTE          0x14
 203
 204 static int cmos_get_fd_drive_type(FDriveType fd0)
 205 {
 206     int val;
 207
 208     switch (fd0) {
 209     case FDRIVE_DRV_144:
 210         /* 1.44 Mb 3"5 drive */
 211         val = 4;
 212         break;
 213     case FDRIVE_DRV_288:
 214         /* 2.88 Mb 3"5 drive */
 215         val = 5;
 216         break;
 217     case FDRIVE_DRV_120:
 218         /* 1.2 Mb 5"5 drive */
 219         val = 2;
 220         break;
 221     case FDRIVE_DRV_NONE:
 222     default:
 223         val = 0;
 224         break;
 225     }
 226     return val;
 227 }
 228
 229 static void cmos_init_hd(ISADevice *s, int type_ofs, int info_ofs,
 230                          int16_t cylinders, int8_t heads, int8_t sectors)
 231 {
 232     rtc_set_memory(s, type_ofs, 47);
 233     rtc_set_memory(s, info_ofs, cylinders);
 234     rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
 235     rtc_set_memory(s, info_ofs + 2, heads);
 236     rtc_set_memory(s, info_ofs + 3, 0xff);
 237     rtc_set_memory(s, info_ofs + 4, 0xff);
 238     rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
 239     rtc_set_memory(s, info_ofs + 6, cylinders);
 240     rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
 241     rtc_set_memory(s, info_ofs + 8, sectors);
 242 }
 243
 244 /* convert boot_device letter to something recognizable by the bios */
 245 static int boot_device2nibble(char boot_device)
 246 {
 247     switch(boot_device) {
 248     case 'a':
 249     case 'b':
 250         return 0x01; /* floppy boot */
 251     case 'c':
 252         return 0x02; /* hard drive boot */
 253     case 'd':
 254         return 0x03; /* CD-ROM boot */
 255     case 'n':
 256         return 0x04; /* Network boot */
 257     }
 258     return 0;
 259 }
 260
 261 static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk)
 262 {
 263 #define PC_MAX_BOOT_DEVICES 3
 264     int nbds, bds[3] = { 0, };
 265     int i;
 266
 267     nbds = strlen(boot_device);
 268     if (nbds > PC_MAX_BOOT_DEVICES) {
 269         error_report("Too many boot devices for PC");
 270         return(1);
 271     }
 272     for (i = 0; i < nbds; i++) {
 273         bds[i] = boot_device2nibble(boot_device[i]);
 274         if (bds[i] == 0) {
 275             error_report("Invalid boot device for PC: '%c'",
 276                          boot_device[i]);
 277             return(1);
 278         }
 279     }
 280     rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
 281     rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ? 0x0 : 0x1));
 282     return(0);
 283 }
 284
 285 static int pc_boot_set(void *opaque, const char *boot_device)
 286 {
 287     return set_boot_dev(opaque, boot_device, 0);
 288 }
 289
 290 typedef struct pc_cmos_init_late_arg {
 291     ISADevice *rtc_state;
 292     BusState *idebus[2];
 293 } pc_cmos_init_late_arg;
 294
 295 static void pc_cmos_init_late(void *opaque)
 296 {
 297     pc_cmos_init_late_arg *arg = opaque;
 298     ISADevice *s = arg->rtc_state;
 299     int16_t cylinders;
 300     int8_t heads, sectors;
 301     int val;
 302     int i, trans;
 303
 304     val = 0;
 305     if (ide_get_geometry(arg->idebus[0], 0,
 306                          &cylinders, &heads, &sectors) >= 0) {
 307         cmos_init_hd(s, 0x19, 0x1b, cylinders, heads, sectors);
 308         val |= 0xf0;
 309     }
 310     if (ide_get_geometry(arg->idebus[0], 1,
 311                          &cylinders, &heads, &sectors) >= 0) {
 312         cmos_init_hd(s, 0x1a, 0x24, cylinders, heads, sectors);
 313         val |= 0x0f;
 314     }
 315     rtc_set_memory(s, 0x12, val);
 316
 317     val = 0;
 318     for (i = 0; i < 4; i++) {
 319         /* NOTE: ide_get_geometry() returns the physical
 320            geometry.  It is always such that: 1 <= sects <= 63, 1
 321            <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
 322            geometry can be different if a translation is done. */
 323         if (ide_get_geometry(arg->idebus[i / 2], i % 2,
 324                              &cylinders, &heads, &sectors) >= 0) {
 325             trans = ide_get_bios_chs_trans(arg->idebus[i / 2], i % 2) - 1;
 326             assert((trans & ~3) == 0);
 327             val |= trans << (i * 2);
 328         }
 329     }
 330     rtc_set_memory(s, 0x39, val);
 331
 332     qemu_unregister_reset(pc_cmos_init_late, opaque);
 333 }
 334
 335 void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
 336                   const char *boot_device,
 337                   ISADevice *floppy, BusState *idebus0, BusState *idebus1,
 338                   ISADevice *s)
 339 {
 340     int val, nb, i;
 341     FDriveType fd_type[2] = { FDRIVE_DRV_NONE, FDRIVE_DRV_NONE };
 342     static pc_cmos_init_late_arg arg;
 343
 344     /* various important CMOS locations needed by PC/Bochs bios */
 345
 346     /* memory size */
 347     /* base memory (first MiB) */
 348     val = MIN(ram_size / 1024, 640);
 349     rtc_set_memory(s, 0x15, val);
 350     rtc_set_memory(s, 0x16, val >> 8);
 351     /* extended memory (next 64MiB) */
 352     if (ram_size > 1024 * 1024) {
 353         val = (ram_size - 1024 * 1024) / 1024;
 354     } else {
 355         val = 0;
 356     }
 357     if (val > 65535)
 358         val = 65535;
 359     rtc_set_memory(s, 0x17, val);
 360     rtc_set_memory(s, 0x18, val >> 8);
 361     rtc_set_memory(s, 0x30, val);
 362     rtc_set_memory(s, 0x31, val >> 8);
 363     /* memory between 16MiB and 4GiB */
 364     if (ram_size > 16 * 1024 * 1024) {
 365         val = (ram_size - 16 * 1024 * 1024) / 65536;
 366     } else {
 367         val = 0;
 368     }
 369     if (val > 65535)
 370         val = 65535;
 371     rtc_set_memory(s, 0x34, val);
 372     rtc_set_memory(s, 0x35, val >> 8);
 373     /* memory above 4GiB */
 374     val = above_4g_mem_size / 65536;
 375     rtc_set_memory(s, 0x5b, val);
 376     rtc_set_memory(s, 0x5c, val >> 8);
 377     rtc_set_memory(s, 0x5d, val >> 16);
 378
 379     /* set the number of CPU */
 380     rtc_set_memory(s, 0x5f, smp_cpus - 1);
 381
 382     /* set boot devices, and disable floppy signature check if requested */
 383     if (set_boot_dev(s, boot_device, fd_bootchk)) {
 384         exit(1);
 385     }
 386
 387     /* floppy type */
 388     if (floppy) {
 389         for (i = 0; i < 2; i++) {
 390             fd_type[i] = isa_fdc_get_drive_type(floppy, i);
 391         }
 392     }
 393     val = (cmos_get_fd_drive_type(fd_type[0]) << 4) |
 394         cmos_get_fd_drive_type(fd_type[1]);
 395     rtc_set_memory(s, 0x10, val);
 396
 397     val = 0;
 398     nb = 0;
 399     if (fd_type[0] < FDRIVE_DRV_NONE) {
 400         nb++;
 401     }
 402     if (fd_type[1] < FDRIVE_DRV_NONE) {
 403         nb++;
 404     }
 405     switch (nb) {
 406     case 0:
 407         break;
 408     case 1:
 409         val |= 0x01; /* 1 drive, ready for boot */
 410         break;
 411     case 2:
 412         val |= 0x41; /* 2 drives, ready for boot */
 413         break;
 414     }
 415     val |= 0x02; /* FPU is there */
 416     val |= 0x04; /* PS/2 mouse installed */
 417     rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
 418
 419     /* hard drives */
 420     arg.rtc_state = s;
 421     arg.idebus[0] = idebus0;
 422     arg.idebus[1] = idebus1;
 423     qemu_register_reset(pc_cmos_init_late, &arg);
 424 }
 425
 426 /* port 92 stuff: could be split off */
 427 typedef struct Port92State {
 428     ISADevice dev;
 429     MemoryRegion io;
 430     uint8_t outport;
 431     qemu_irq *a20_out;
 432 } Port92State;
 433
 434 static void port92_write(void *opaque, hwaddr addr, uint64_t val,
 435                          unsigned size)
 436 {
 437     Port92State *s = opaque;
 438
 439     DPRINTF("port92: write 0x%02x\n", val);
 440     s->outport = val;
 441     qemu_set_irq(*s->a20_out, (val >> 1) & 1);
 442     if (val & 1) {
 443         qemu_system_reset_request();
 444     }
 445 }
 446
 447 static uint64_t port92_read(void *opaque, hwaddr addr,
 448                             unsigned size)
 449 {
 450     Port92State *s = opaque;
 451     uint32_t ret;
 452
 453     ret = s->outport;
 454     DPRINTF("port92: read 0x%02x\n", ret);
 455     return ret;
 456 }
 457
 458 static void port92_init(ISADevice *dev, qemu_irq *a20_out)
 459 {
 460     Port92State *s = DO_UPCAST(Port92State, dev, dev);
 461
 462     s->a20_out = a20_out;
 463 }
 464
 465 static const VMStateDescription vmstate_port92_isa = {
 466     .name = "port92",
 467     .version_id = 1,
 468     .minimum_version_id = 1,
 469     .minimum_version_id_old = 1,
 470     .fields      = (VMStateField []) {
 471         VMSTATE_UINT8(outport, Port92State),
 472         VMSTATE_END_OF_LIST()
 473     }
 474 };
 475
 476 static void port92_reset(DeviceState *d)
 477 {
 478     Port92State *s = container_of(d, Port92State, dev.qdev);
 479
 480     s->outport &= ~1;
 481 }
 482
 483 static const MemoryRegionOps port92_ops = {
 484     .read = port92_read,
 485     .write = port92_write,
 486     .impl = {
 487         .min_access_size = 1,
 488         .max_access_size = 1,
 489     },
 490     .endianness = DEVICE_LITTLE_ENDIAN,
 491 };
 492
 493 static int port92_initfn(ISADevice *dev)
 494 {
 495     Port92State *s = DO_UPCAST(Port92State, dev, dev);
 496
 497     memory_region_init_io(&s->io, &port92_ops, s, "port92", 1);
 498     isa_register_ioport(dev, &s->io, 0x92);
 499
 500     s->outport = 0;
 501     return 0;
 502 }
 503
 504 static void port92_class_initfn(ObjectClass *klass, void *data)
 505 {
 506     DeviceClass *dc = DEVICE_CLASS(klass);
 507     ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
 508     ic->init = port92_initfn;
 509     dc->no_user = 1;
 510     dc->reset = port92_reset;
 511     dc->vmsd = &vmstate_port92_isa;
 512 }
 513
 514 static const TypeInfo port92_info = {
 515     .name          = "port92",
 516     .parent        = TYPE_ISA_DEVICE,
 517     .instance_size = sizeof(Port92State),
 518     .class_init    = port92_class_initfn,
 519 };
 520
 521 static void port92_register_types(void)
 522 {
 523     type_register_static(&port92_info);
 524 }
 525
 526 type_init(port92_register_types)
 527
 528 static void handle_a20_line_change(void *opaque, int irq, int level)
 529 {
 530     CPUX86State *cpu = opaque;
 531
 532     /* XXX: send to all CPUs ? */
 533     /* XXX: add logic to handle multiple A20 line sources */
 534     cpu_x86_set_a20(cpu, level);
 535 }
 536
 537 int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
 538 {
 539     int index = le32_to_cpu(e820_table.count);
 540     struct e820_entry *entry;
 541
 542     if (index >= E820_NR_ENTRIES)
 543         return -EBUSY;
 544     entry = &e820_table.entry[index++];
 545
 546     entry->address = cpu_to_le64(address);
 547     entry->length = cpu_to_le64(length);
 548     entry->type = cpu_to_le32(type);
 549
 550     e820_table.count = cpu_to_le32(index);
 551     return index;
 552 }
 553
 554 static void *bochs_bios_init(void)
 555 {
 556     void *fw_cfg;
 557     uint8_t *smbios_table;
 558     size_t smbios_len;
 559     uint64_t *numa_fw_cfg;
 560     int i, j;
 561
 562     fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
 563
 564     fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
 565     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
 566     fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES, (uint8_t *)acpi_tables,
 567                      acpi_tables_len);
 568     fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override());
 569
 570     smbios_table = smbios_get_table(&smbios_len);
 571     if (smbios_table)
 572         fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES,
 573                          smbios_table, smbios_len);
 574     fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, (uint8_t *)&e820_table,
 575                      sizeof(struct e820_table));
 576
 577     fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, (uint8_t *)&hpet_cfg,
 578                      sizeof(struct hpet_fw_config));
 579     /* allocate memory for the NUMA channel: one (64bit) word for the number
 580      * of nodes, one word for each VCPU->node and one word for each node to
 581      * hold the amount of memory.
 582      */
 583     numa_fw_cfg = g_malloc0((1 + max_cpus + nb_numa_nodes) * 8);
 584     numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes);
 585     for (i = 0; i < max_cpus; i++) {
 586         for (j = 0; j < nb_numa_nodes; j++) {
 587             if (test_bit(i, node_cpumask[j])) {
 588                 numa_fw_cfg[i + 1] = cpu_to_le64(j);
 589                 break;
 590             }
 591         }
 592     }
 593     for (i = 0; i < nb_numa_nodes; i++) {
 594         numa_fw_cfg[max_cpus + 1 + i] = cpu_to_le64(node_mem[i]);
 595     }
 596     fw_cfg_add_bytes(fw_cfg, FW_CFG_NUMA, (uint8_t *)numa_fw_cfg,
 597                      (1 + max_cpus + nb_numa_nodes) * 8);
 598
 599     return fw_cfg;
 600 }
 601
 602 static long get_file_size(FILE *f)
 603 {
 604     long where, size;
 605
 606     /* XXX: on Unix systems, using fstat() probably makes more sense */
 607
 608     where = ftell(f);
 609     fseek(f, 0, SEEK_END);
 610     size = ftell(f);
 611     fseek(f, where, SEEK_SET);
 612
 613     return size;
 614 }
 615
 616 static void load_linux(void *fw_cfg,
 617                        const char *kernel_filename,
 618                        const char *initrd_filename,
 619                        const char *kernel_cmdline,
 620                        hwaddr max_ram_size)
 621 {
 622     uint16_t protocol;
 623     int setup_size, kernel_size, initrd_size = 0, cmdline_size;
 624     uint32_t initrd_max;
 625     uint8_t header[8192], *setup, *kernel, *initrd_data;
 626     hwaddr real_addr, prot_addr, cmdline_addr, initrd_addr = 0;
 627     FILE *f;
 628     char *vmode;
 629
 630     /* Align to 16 bytes as a paranoia measure */
 631     cmdline_size = (strlen(kernel_cmdline)+16) & ~15;
 632
 633     /* load the kernel header */
 634     f = fopen(kernel_filename, "rb");
 635     if (!f || !(kernel_size = get_file_size(f)) ||
 636         fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) !=
 637         MIN(ARRAY_SIZE(header), kernel_size)) {
 638         fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
 639                 kernel_filename, strerror(errno));
 640         exit(1);
 641     }
 642
 643     /* kernel protocol version */
 644 #if 0
 645     fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
 646 #endif
 647     if (ldl_p(header+0x202) == 0x53726448)
 648         protocol = lduw_p(header+0x206);
 649     else {
 650         /* This looks like a multiboot kernel. If it is, let's stop
 651            treating it like a Linux kernel. */
 652         if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
 653                            kernel_cmdline, kernel_size, header))
 654             return;
 655         protocol = 0;
 656     }
 657
 658     if (protocol < 0x200 || !(header[0x211] & 0x01)) {
 659         /* Low kernel */
 660         real_addr    = 0x90000;
 661         cmdline_addr = 0x9a000 - cmdline_size;
 662         prot_addr    = 0x10000;
 663     } else if (protocol < 0x202) {
 664         /* High but ancient kernel */
 665         real_addr    = 0x90000;
 666         cmdline_addr = 0x9a000 - cmdline_size;
 667         prot_addr    = 0x100000;
 668     } else {
 669         /* High and recent kernel */
 670         real_addr    = 0x10000;
 671         cmdline_addr = 0x20000;
 672         prot_addr    = 0x100000;
 673     }
 674
 675 #if 0
 676     fprintf(stderr,
 677             "qemu: real_addr     = 0x" TARGET_FMT_plx "\n"
 678             "qemu: cmdline_addr  = 0x" TARGET_FMT_plx "\n"
 679             "qemu: prot_addr     = 0x" TARGET_FMT_plx "\n",
 680             real_addr,
 681             cmdline_addr,
 682             prot_addr);
 683 #endif
 684
 685     /* highest address for loading the initrd */
 686     if (protocol >= 0x203)
 687         initrd_max = ldl_p(header+0x22c);
 688     else
 689         initrd_max = 0x37ffffff;
 690
 691     if (initrd_max >= max_ram_size-ACPI_DATA_SIZE)
 692         initrd_max = max_ram_size-ACPI_DATA_SIZE-1;
 693
 694     fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr);
 695     fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(kernel_cmdline)+1);
 696     fw_cfg_add_bytes(fw_cfg, FW_CFG_CMDLINE_DATA,
 697                      (uint8_t*)strdup(kernel_cmdline),
 698                      strlen(kernel_cmdline)+1);
 699
 700     if (protocol >= 0x202) {
 701         stl_p(header+0x228, cmdline_addr);
 702     } else {
 703         stw_p(header+0x20, 0xA33F);
 704         stw_p(header+0x22, cmdline_addr-real_addr);
 705     }
 706
 707     /* handle vga= parameter */
 708     vmode = strstr(kernel_cmdline, "vga=");
 709     if (vmode) {
 710         unsigned int video_mode;
 711         /* skip "vga=" */
 712         vmode += 4;
 713         if (!strncmp(vmode, "normal", 6)) {
 714             video_mode = 0xffff;
 715         } else if (!strncmp(vmode, "ext", 3)) {
 716             video_mode = 0xfffe;
 717         } else if (!strncmp(vmode, "ask", 3)) {
 718             video_mode = 0xfffd;
 719         } else {
 720             video_mode = strtol(vmode, NULL, 0);
 721         }
 722         stw_p(header+0x1fa, video_mode);
 723     }
 724
 725     /* loader type */
 726     /* High nybble = B reserved for QEMU; low nybble is revision number.
 727        If this code is substantially changed, you may want to consider
 728        incrementing the revision. */
 729     if (protocol >= 0x200)
 730         header[0x210] = 0xB0;
 731
 732     /* heap */
 733     if (protocol >= 0x201) {
 734         header[0x211] |= 0x80;  /* CAN_USE_HEAP */
 735         stw_p(header+0x224, cmdline_addr-real_addr-0x200);
 736     }
 737
 738     /* load initrd */
 739     if (initrd_filename) {
 740         if (protocol < 0x200) {
 741             fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
 742             exit(1);
 743         }
 744
 745         initrd_size = get_image_size(initrd_filename);
 746         if (initrd_size < 0) {
 747             fprintf(stderr, "qemu: error reading initrd %s\n",
 748                     initrd_filename);
 749             exit(1);
 750         }
 751
 752         initrd_addr = (initrd_max-initrd_size) & ~4095;
 753
 754         initrd_data = g_malloc(initrd_size);
 755         load_image(initrd_filename, initrd_data);
 756
 757         fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr);
 758         fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
 759         fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data, initrd_size);
 760
 761         stl_p(header+0x218, initrd_addr);
 762         stl_p(header+0x21c, initrd_size);
 763     }
 764
 765     /* load kernel and setup */
 766     setup_size = header[0x1f1];
 767     if (setup_size == 0)
 768         setup_size = 4;
 769     setup_size = (setup_size+1)*512;
 770     kernel_size -= setup_size;
 771
 772     setup  = g_malloc(setup_size);
 773     kernel = g_malloc(kernel_size);
 774     fseek(f, 0, SEEK_SET);
 775     if (fread(setup, 1, setup_size, f) != setup_size) {
 776         fprintf(stderr, "fread() failed\n");
 777         exit(1);
 778     }
 779     if (fread(kernel, 1, kernel_size, f) != kernel_size) {
 780         fprintf(stderr, "fread() failed\n");
 781         exit(1);
 782     }
 783     fclose(f);
 784     memcpy(setup, header, MIN(sizeof(header), setup_size));
 785
 786     fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr);
 787     fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
 788     fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size);
 789
 790     fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr);
 791     fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size);
 792     fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size);
 793
 794     option_rom[nb_option_roms].name = "linuxboot.bin";
 795     option_rom[nb_option_roms].bootindex = 0;
 796     nb_option_roms++;
 797 }
 798
 799 #define NE2000_NB_MAX 6
 800
 801 static const int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360,
 802                                               0x280, 0x380 };
 803 static const int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
 804
 805 static const int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
 806 static const int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
 807
 808 void pc_init_ne2k_isa(ISABus *bus, NICInfo *nd)
 809 {
 810     static int nb_ne2k = 0;
 811
 812     if (nb_ne2k == NE2000_NB_MAX)
 813         return;
 814     isa_ne2000_init(bus, ne2000_io[nb_ne2k],
 815                     ne2000_irq[nb_ne2k], nd);
 816     nb_ne2k++;
 817 }
 818
 819 DeviceState *cpu_get_current_apic(void)
 820 {
 821     if (cpu_single_env) {
 822         return cpu_single_env->apic_state;
 823     } else {
 824         return NULL;
 825     }
 826 }
 827
 828 void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
 829 {
 830     CPUX86State *s = opaque;
 831
 832     if (level) {
 833         cpu_interrupt(s, CPU_INTERRUPT_SMI);
 834     }
 835 }
 836
 837 void pc_cpus_init(const char *cpu_model)
 838 {
 839     int i;
 840
 841     /* init CPUs */
 842     if (cpu_model == NULL) {
 843 #ifdef TARGET_X86_64
 844         cpu_model = "qemu64";
 845 #else
 846         cpu_model = "qemu32";
 847 #endif
 848     }
 849
 850     for (i = 0; i < smp_cpus; i++) {
 851         if (!cpu_x86_init(cpu_model)) {
 852             fprintf(stderr, "Unable to find x86 CPU definition\n");
 853             exit(1);
 854         }
 855     }
 856 }
 857
 858 void pc_acpi_init(const char *default_dsdt)
 859 {
 860     char *filename = NULL, *arg = NULL;
 861
 862     if (acpi_tables != NULL) {
 863         /* manually set via -acpitable, leave it alone */
 864         return;
 865     }
 866
 867     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, default_dsdt);
 868     if (filename == NULL) {
 869         fprintf(stderr, "WARNING: failed to find %s\n", default_dsdt);
 870         return;
 871     }
 872
 873     arg = g_strdup_printf("file=%s", filename);
 874     if (acpi_table_add(arg) != 0) {
 875         fprintf(stderr, "WARNING: failed to load %s\n", filename);
 876     }
 877     g_free(arg);
 878     g_free(filename);
 879 }
 880
 881 void *pc_memory_init(MemoryRegion *system_memory,
 882                     const char *kernel_filename,
 883                     const char *kernel_cmdline,
 884                     const char *initrd_filename,
 885                     ram_addr_t below_4g_mem_size,
 886                     ram_addr_t above_4g_mem_size,
 887                     MemoryRegion *rom_memory,
 888                     MemoryRegion **ram_memory)
 889 {
 890     int linux_boot, i;
 891     MemoryRegion *ram, *option_rom_mr;
 892     MemoryRegion *ram_below_4g, *ram_above_4g;
 893     void *fw_cfg;
 894
 895     linux_boot = (kernel_filename != NULL);
 896
 897     /* Allocate RAM.  We allocate it as a single memory region and use
 898      * aliases to address portions of it, mostly for backwards compatibility
 899      * with older qemus that used qemu_ram_alloc().
 900      */
 901     ram = g_malloc(sizeof(*ram));
 902     memory_region_init_ram(ram, "pc.ram",
 903                            below_4g_mem_size + above_4g_mem_size);
 904     vmstate_register_ram_global(ram);
 905     *ram_memory = ram;
 906     ram_below_4g = g_malloc(sizeof(*ram_below_4g));
 907     memory_region_init_alias(ram_below_4g, "ram-below-4g", ram,
 908                              0, below_4g_mem_size);
 909     memory_region_add_subregion(system_memory, 0, ram_below_4g);
 910     if (above_4g_mem_size > 0) {
 911         ram_above_4g = g_malloc(sizeof(*ram_above_4g));
 912         memory_region_init_alias(ram_above_4g, "ram-above-4g", ram,
 913                                  below_4g_mem_size, above_4g_mem_size);
 914         memory_region_add_subregion(system_memory, 0x100000000ULL,
 915                                     ram_above_4g);
 916     }
 917
 918
 919     /* Initialize PC system firmware */
 920     pc_system_firmware_init(rom_memory);
 921
 922     option_rom_mr = g_malloc(sizeof(*option_rom_mr));
 923     memory_region_init_ram(option_rom_mr, "pc.rom", PC_ROM_SIZE);
 924     vmstate_register_ram_global(option_rom_mr);
 925     memory_region_add_subregion_overlap(rom_memory,
 926                                         PC_ROM_MIN_VGA,
 927                                         option_rom_mr,
 928                                         1);
 929
 930     fw_cfg = bochs_bios_init();
 931     rom_set_fw(fw_cfg);
 932
 933     if (linux_boot) {
 934         load_linux(fw_cfg, kernel_filename, initrd_filename, kernel_cmdline, below_4g_mem_size);
 935     }
 936
 937     for (i = 0; i < nb_option_roms; i++) {
 938         rom_add_option(option_rom[i].name, option_rom[i].bootindex);
 939     }
 940     return fw_cfg;
 941 }
 942
 943 qemu_irq *pc_allocate_cpu_irq(void)
 944 {
 945     return qemu_allocate_irqs(pic_irq_request, NULL, 1);
 946 }
 947
 948 DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus)
 949 {
 950     DeviceState *dev = NULL;
 951
 952     if (pci_bus) {
 953         PCIDevice *pcidev = pci_vga_init(pci_bus);
 954         dev = pcidev ? &pcidev->qdev : NULL;
 955     } else if (isa_bus) {
 956         ISADevice *isadev = isa_vga_init(isa_bus);
 957         dev = isadev ? &isadev->qdev : NULL;
 958     }
 959     return dev;
 960 }
 961
 962 static void cpu_request_exit(void *opaque, int irq, int level)
 963 {
 964     CPUX86State *env = cpu_single_env;
 965
 966     if (env && level) {
 967         cpu_exit(env);
 968     }
 969 }
 970
 971 static const MemoryRegionOps ioport80_io_ops = {
 972     .write = ioport80_write,
 973     .read = ioport80_read,
 974     .endianness = DEVICE_NATIVE_ENDIAN,
 975     .impl = {
 976         .min_access_size = 1,
 977         .max_access_size = 1,
 978     },
 979 };
 980
 981 static const MemoryRegionOps ioportF0_io_ops = {
 982     .write = ioportF0_write,
 983     .read = ioportF0_read,
 984     .endianness = DEVICE_NATIVE_ENDIAN,
 985     .impl = {
 986         .min_access_size = 1,
 987         .max_access_size = 1,
 988     },
 989 };
 990
 991 void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
 992                           ISADevice **rtc_state,
 993                           ISADevice **floppy,
 994                           bool no_vmport)
 995 {
 996     int i;
 997     DriveInfo *fd[MAX_FD];
 998     DeviceState *hpet = NULL;
 999     int pit_isa_irq = 0;
1000     qemu_irq pit_alt_irq = NULL;
1001     qemu_irq rtc_irq = NULL;
1002     qemu_irq *a20_line;
1003     ISADevice *i8042, *port92, *vmmouse, *pit = NULL;
1004     qemu_irq *cpu_exit_irq;
1005     MemoryRegion *ioport80_io = g_new(MemoryRegion, 1);
1006     MemoryRegion *ioportF0_io = g_new(MemoryRegion, 1);
1007
1008     memory_region_init_io(ioport80_io, &ioport80_io_ops, NULL, "ioport80", 1);
1009     memory_region_add_subregion(isa_bus->address_space_io, 0x80, ioport80_io);
1010
1011     memory_region_init_io(ioportF0_io, &ioportF0_io_ops, NULL, "ioportF0", 1);
1012     memory_region_add_subregion(isa_bus->address_space_io, 0xf0, ioportF0_io);
1013
1014     /*
1015      * Check if an HPET shall be created.
1016      *
1017      * Without KVM_CAP_PIT_STATE2, we cannot switch off the in-kernel PIT
1018      * when the HPET wants to take over. Thus we have to disable the latter.
1019      */
1020     if (!no_hpet && (!kvm_irqchip_in_kernel() || kvm_has_pit_state2())) {
1021         hpet = sysbus_try_create_simple("hpet", HPET_BASE, NULL);
1022
1023         if (hpet) {
1024             for (i = 0; i < GSI_NUM_PINS; i++) {
1025                 sysbus_connect_irq(sysbus_from_qdev(hpet), i, gsi[i]);
1026             }
1027             pit_isa_irq = -1;
1028             pit_alt_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_PIT_INT);
1029             rtc_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_RTC_INT);
1030         }
1031     }
1032     *rtc_state = rtc_init(isa_bus, 2000, rtc_irq);
1033
1034     qemu_register_boot_set(pc_boot_set, *rtc_state);
1035
1036     if (!xen_enabled()) {
1037         if (kvm_irqchip_in_kernel()) {
1038             pit = kvm_pit_init(isa_bus, 0x40);
1039         } else {
1040             pit = pit_init(isa_bus, 0x40, pit_isa_irq, pit_alt_irq);
1041         }
1042         if (hpet) {
1043             /* connect PIT to output control line of the HPET */
1044             qdev_connect_gpio_out(hpet, 0, qdev_get_gpio_in(&pit->qdev, 0));
1045         }
1046         pcspk_init(isa_bus, pit);
1047     }
1048
1049     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
1050         if (serial_hds[i]) {
1051             serial_isa_init(isa_bus, i, serial_hds[i]);
1052         }
1053     }
1054
1055     for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
1056         if (parallel_hds[i]) {
1057             parallel_init(isa_bus, i, parallel_hds[i]);
1058         }
1059     }
1060
1061     a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 2);
1062     i8042 = isa_create_simple(isa_bus, "i8042");
1063     i8042_setup_a20_line(i8042, &a20_line[0]);
1064     if (!no_vmport) {
1065         vmport_init(isa_bus);
1066         vmmouse = isa_try_create(isa_bus, "vmmouse");
1067     } else {
1068         vmmouse = NULL;
1069     }
1070     if (vmmouse) {
1071         qdev_prop_set_ptr(&vmmouse->qdev, "ps2_mouse", i8042);
1072         qdev_init_nofail(&vmmouse->qdev);
1073     }
1074     port92 = isa_create_simple(isa_bus, "port92");
1075     port92_init(port92, &a20_line[1]);
1076
1077     cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
1078     DMA_init(0, cpu_exit_irq);
1079
1080     for(i = 0; i < MAX_FD; i++) {
1081         fd[i] = drive_get(IF_FLOPPY, 0, i);
1082     }
1083     *floppy = fdctrl_init_isa(isa_bus, fd);
1084 }
1085
1086 void pc_nic_init(ISABus *isa_bus, PCIBus *pci_bus)
1087 {
1088     int i;
1089
1090     for (i = 0; i < nb_nics; i++) {
1091         NICInfo *nd = &nd_table[i];
1092
1093         if (!pci_bus || (nd->model && strcmp(nd->model, "ne2k_isa") == 0)) {
1094             pc_init_ne2k_isa(isa_bus, nd);
1095         } else {
1096             pci_nic_init_nofail(nd, "e1000", NULL);
1097         }
1098     }
1099 }
1100
1101 void pc_pci_device_init(PCIBus *pci_bus)
1102 {
1103     int max_bus;
1104     int bus;
1105
1106     max_bus = drive_get_max_bus(IF_SCSI);
1107     for (bus = 0; bus <= max_bus; bus++) {
1108         pci_create_simple(pci_bus, -1, "lsi53c895a");
1109     }
1110 }
1111
1112 void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name)
1113 {
1114     DeviceState *dev;
1115     SysBusDevice *d;
1116     unsigned int i;
1117
1118     if (kvm_irqchip_in_kernel()) {
1119         dev = qdev_create(NULL, "kvm-ioapic");
1120     } else {
1121         dev = qdev_create(NULL, "ioapic");
1122     }
1123     if (parent_name) {
1124         object_property_add_child(object_resolve_path(parent_name, NULL),
1125                                   "ioapic", OBJECT(dev), NULL);
1126     }
1127     qdev_init_nofail(dev);
1128     d = sysbus_from_qdev(dev);
1129     sysbus_mmio_map(d, 0, 0xfec00000);
1130
1131     for (i = 0; i < IOAPIC_NUM_PINS; i++) {
1132         gsi_state->ioapic_irq[i] = qdev_get_gpio_in(dev, i);
1133     }
1134 }