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 "vl.h"
  25
  26 /* output Bochs bios info messages */
  27 //#define DEBUG_BIOS
  28
  29 #define BIOS_FILENAME "bios.bin"
  30 #define VGABIOS_FILENAME "vgabios.bin"
  31 #define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"
  32 #define LINUX_BOOT_FILENAME "linux_boot.bin"
  33
  34 #define KERNEL_LOAD_ADDR     0x00100000
  35 #define MAX_INITRD_LOAD_ADDR 0x38000000
  36 #define KERNEL_PARAMS_ADDR   0x00090000
  37 #define KERNEL_CMDLINE_ADDR  0x00099000
  38 /* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables.  */
  39 #define ACPI_DATA_SIZE       0x10000
  40
  41 static fdctrl_t *floppy_controller;
  42 static RTCState *rtc_state;
  43 static PITState *pit;
  44 static IOAPICState *ioapic;
  45 static PCIDevice *i440fx_state;
  46
  47 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
  48 {
  49 }
  50
  51 /* MSDOS compatibility mode FPU exception support */
  52 static qemu_irq ferr_irq;
  53 /* XXX: add IGNNE support */
  54 void cpu_set_ferr(CPUX86State *s)
  55 {
  56     qemu_irq_raise(ferr_irq);
  57 }
  58
  59 static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
  60 {
  61     qemu_irq_lower(ferr_irq);
  62 }
  63
  64 /* TSC handling */
  65 uint64_t cpu_get_tsc(CPUX86State *env)
  66 {
  67     /* Note: when using kqemu, it is more logical to return the host TSC
  68        because kqemu does not trap the RDTSC instruction for
  69        performance reasons */
  70 #if USE_KQEMU
  71     if (env->kqemu_enabled) {
  72         return cpu_get_real_ticks();
  73     } else
  74 #endif
  75     {
  76         return cpu_get_ticks();
  77     }
  78 }
  79
  80 /* SMM support */
  81 void cpu_smm_update(CPUState *env)
  82 {
  83     if (i440fx_state && env == first_cpu)
  84         i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
  85 }
  86
  87
  88 /* IRQ handling */
  89 int cpu_get_pic_interrupt(CPUState *env)
  90 {
  91     int intno;
  92
  93     intno = apic_get_interrupt(env);
  94     if (intno >= 0) {
  95         /* set irq request if a PIC irq is still pending */
  96         /* XXX: improve that */
  97         pic_update_irq(isa_pic);
  98         return intno;
  99     }
 100     /* read the irq from the PIC */
 101     intno = pic_read_irq(isa_pic);
 102     return intno;
 103 }
 104
 105 static void pic_irq_request(void *opaque, int irq, int level)
 106 {
 107     CPUState *env = opaque;
 108     if (level)
 109         cpu_interrupt(env, CPU_INTERRUPT_HARD);
 110     else
 111         cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
 112 }
 113
 114 /* PC cmos mappings */
 115
 116 #define REG_EQUIPMENT_BYTE          0x14
 117
 118 static int cmos_get_fd_drive_type(int fd0)
 119 {
 120     int val;
 121
 122     switch (fd0) {
 123     case 0:
 124         /* 1.44 Mb 3"5 drive */
 125         val = 4;
 126         break;
 127     case 1:
 128         /* 2.88 Mb 3"5 drive */
 129         val = 5;
 130         break;
 131     case 2:
 132         /* 1.2 Mb 5"5 drive */
 133         val = 2;
 134         break;
 135     default:
 136         val = 0;
 137         break;
 138     }
 139     return val;
 140 }
 141
 142 static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd)
 143 {
 144     RTCState *s = rtc_state;
 145     int cylinders, heads, sectors;
 146     bdrv_get_geometry_hint(hd, &cylinders, &heads, &sectors);
 147     rtc_set_memory(s, type_ofs, 47);
 148     rtc_set_memory(s, info_ofs, cylinders);
 149     rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
 150     rtc_set_memory(s, info_ofs + 2, heads);
 151     rtc_set_memory(s, info_ofs + 3, 0xff);
 152     rtc_set_memory(s, info_ofs + 4, 0xff);
 153     rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
 154     rtc_set_memory(s, info_ofs + 6, cylinders);
 155     rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
 156     rtc_set_memory(s, info_ofs + 8, sectors);
 157 }
 158
 159 /* hd_table must contain 4 block drivers */
 160 static void cmos_init(int ram_size, int boot_device, BlockDriverState **hd_table)
 161 {
 162     RTCState *s = rtc_state;
 163     int val;
 164     int fd0, fd1, nb;
 165     int i;
 166
 167     /* various important CMOS locations needed by PC/Bochs bios */
 168
 169     /* memory size */
 170     val = 640; /* base memory in K */
 171     rtc_set_memory(s, 0x15, val);
 172     rtc_set_memory(s, 0x16, val >> 8);
 173
 174     val = (ram_size / 1024) - 1024;
 175     if (val > 65535)
 176         val = 65535;
 177     rtc_set_memory(s, 0x17, val);
 178     rtc_set_memory(s, 0x18, val >> 8);
 179     rtc_set_memory(s, 0x30, val);
 180     rtc_set_memory(s, 0x31, val >> 8);
 181
 182     if (ram_size > (16 * 1024 * 1024))
 183         val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
 184     else
 185         val = 0;
 186     if (val > 65535)
 187         val = 65535;
 188     rtc_set_memory(s, 0x34, val);
 189     rtc_set_memory(s, 0x35, val >> 8);
 190
 191     switch(boot_device) {
 192     case 'a':
 193     case 'b':
 194         rtc_set_memory(s, 0x3d, 0x01); /* floppy boot */
 195         if (!fd_bootchk)
 196             rtc_set_memory(s, 0x38, 0x01); /* disable signature check */
 197         break;
 198     default:
 199     case 'c':
 200         rtc_set_memory(s, 0x3d, 0x02); /* hard drive boot */
 201         break;
 202     case 'd':
 203         rtc_set_memory(s, 0x3d, 0x03); /* CD-ROM boot */
 204         break;
 205     }
 206
 207     /* floppy type */
 208
 209     fd0 = fdctrl_get_drive_type(floppy_controller, 0);
 210     fd1 = fdctrl_get_drive_type(floppy_controller, 1);
 211
 212     val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1);
 213     rtc_set_memory(s, 0x10, val);
 214
 215     val = 0;
 216     nb = 0;
 217     if (fd0 < 3)
 218         nb++;
 219     if (fd1 < 3)
 220         nb++;
 221     switch (nb) {
 222     case 0:
 223         break;
 224     case 1:
 225         val |= 0x01; /* 1 drive, ready for boot */
 226         break;
 227     case 2:
 228         val |= 0x41; /* 2 drives, ready for boot */
 229         break;
 230     }
 231     val |= 0x02; /* FPU is there */
 232     val |= 0x04; /* PS/2 mouse installed */
 233     rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
 234
 235     /* hard drives */
 236
 237     rtc_set_memory(s, 0x12, (hd_table[0] ? 0xf0 : 0) | (hd_table[1] ? 0x0f : 0));
 238     if (hd_table[0])
 239         cmos_init_hd(0x19, 0x1b, hd_table[0]);
 240     if (hd_table[1])
 241         cmos_init_hd(0x1a, 0x24, hd_table[1]);
 242
 243     val = 0;
 244     for (i = 0; i < 4; i++) {
 245         if (hd_table[i]) {
 246             int cylinders, heads, sectors, translation;
 247             /* NOTE: bdrv_get_geometry_hint() returns the physical
 248                 geometry.  It is always such that: 1 <= sects <= 63, 1
 249                 <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
 250                 geometry can be different if a translation is done. */
 251             translation = bdrv_get_translation_hint(hd_table[i]);
 252             if (translation == BIOS_ATA_TRANSLATION_AUTO) {
 253                 bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, &sectors);
 254                 if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
 255                     /* No translation. */
 256                     translation = 0;
 257                 } else {
 258                     /* LBA translation. */
 259                     translation = 1;
 260                 }
 261             } else {
 262                 translation--;
 263             }
 264             val |= translation << (i * 2);
 265         }
 266     }
 267     rtc_set_memory(s, 0x39, val);
 268 }
 269
 270 void ioport_set_a20(int enable)
 271 {
 272     /* XXX: send to all CPUs ? */
 273     cpu_x86_set_a20(first_cpu, enable);
 274 }
 275
 276 int ioport_get_a20(void)
 277 {
 278     return ((first_cpu->a20_mask >> 20) & 1);
 279 }
 280
 281 static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
 282 {
 283     ioport_set_a20((val >> 1) & 1);
 284     /* XXX: bit 0 is fast reset */
 285 }
 286
 287 static uint32_t ioport92_read(void *opaque, uint32_t addr)
 288 {
 289     return ioport_get_a20() << 1;
 290 }
 291
 292 /***********************************************************/
 293 /* Bochs BIOS debug ports */
 294
 295 void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
 296 {
 297     static const char shutdown_str[8] = "Shutdown";
 298     static int shutdown_index = 0;
 299
 300     switch(addr) {
 301         /* Bochs BIOS messages */
 302     case 0x400:
 303     case 0x401:
 304         fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
 305         exit(1);
 306     case 0x402:
 307     case 0x403:
 308 #ifdef DEBUG_BIOS
 309         fprintf(stderr, "%c", val);
 310 #endif
 311         break;
 312     case 0x8900:
 313         /* same as Bochs power off */
 314         if (val == shutdown_str[shutdown_index]) {
 315             shutdown_index++;
 316             if (shutdown_index == 8) {
 317                 shutdown_index = 0;
 318                 qemu_system_shutdown_request();
 319             }
 320         } else {
 321             shutdown_index = 0;
 322         }
 323         break;
 324
 325         /* LGPL'ed VGA BIOS messages */
 326     case 0x501:
 327     case 0x502:
 328         fprintf(stderr, "VGA BIOS panic, line %d\n", val);
 329         exit(1);
 330     case 0x500:
 331     case 0x503:
 332 #ifdef DEBUG_BIOS
 333         fprintf(stderr, "%c", val);
 334 #endif
 335         break;
 336     }
 337 }
 338
 339 void bochs_bios_init(void)
 340 {
 341     register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
 342     register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
 343     register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
 344     register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
 345     register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);
 346
 347     register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
 348     register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
 349     register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
 350     register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
 351 }
 352
 353
 354 int load_kernel(const char *filename, uint8_t *addr,
 355                 uint8_t *real_addr)
 356 {
 357     int fd, size;
 358     int setup_sects;
 359
 360     fd = open(filename, O_RDONLY | O_BINARY);
 361     if (fd < 0)
 362         return -1;
 363
 364     /* load 16 bit code */
 365     if (read(fd, real_addr, 512) != 512)
 366         goto fail;
 367     setup_sects = real_addr[0x1F1];
 368     if (!setup_sects)
 369         setup_sects = 4;
 370     if (read(fd, real_addr + 512, setup_sects * 512) !=
 371         setup_sects * 512)
 372         goto fail;
 373
 374     /* load 32 bit code */
 375     size = read(fd, addr, 16 * 1024 * 1024);
 376     if (size < 0)
 377         goto fail;
 378     close(fd);
 379     return size;
 380  fail:
 381     close(fd);
 382     return -1;
 383 }
 384
 385 static void main_cpu_reset(void *opaque)
 386 {
 387     CPUState *env = opaque;
 388     cpu_reset(env);
 389 }
 390
 391 static const int ide_iobase[2] = { 0x1f0, 0x170 };
 392 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
 393 static const int ide_irq[2] = { 14, 15 };
 394
 395 #define NE2000_NB_MAX 6
 396
 397 static int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
 398 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
 399
 400 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
 401 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
 402
 403 static int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
 404 static int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
 405
 406 #ifdef HAS_AUDIO
 407 static void audio_init (PCIBus *pci_bus, qemu_irq *pic)
 408 {
 409     struct soundhw *c;
 410     int audio_enabled = 0;
 411
 412     for (c = soundhw; !audio_enabled && c->name; ++c) {
 413         audio_enabled = c->enabled;
 414     }
 415
 416     if (audio_enabled) {
 417         AudioState *s;
 418
 419         s = AUD_init ();
 420         if (s) {
 421             for (c = soundhw; c->name; ++c) {
 422                 if (c->enabled) {
 423                     if (c->isa) {
 424                         c->init.init_isa (s, pic);
 425                     }
 426                     else {
 427                         if (pci_bus) {
 428                             c->init.init_pci (pci_bus, s);
 429                         }
 430                     }
 431                 }
 432             }
 433         }
 434     }
 435 }
 436 #endif
 437
 438 static void pc_init_ne2k_isa(NICInfo *nd, qemu_irq *pic)
 439 {
 440     static int nb_ne2k = 0;
 441
 442     if (nb_ne2k == NE2000_NB_MAX)
 443         return;
 444     isa_ne2000_init(ne2000_io[nb_ne2k], pic[ne2000_irq[nb_ne2k]], nd);
 445     nb_ne2k++;
 446 }
 447
 448 /* PC hardware initialisation */
 449 static void pc_init1(int ram_size, int vga_ram_size, int boot_device,
 450                      DisplayState *ds, const char **fd_filename, int snapshot,
 451                      const char *kernel_filename, const char *kernel_cmdline,
 452                      const char *initrd_filename,
 453                      int pci_enabled)
 454 {
 455     char buf[1024];
 456     int ret, linux_boot, initrd_size, i;
 457     ram_addr_t ram_addr, vga_ram_addr, bios_offset, vga_bios_offset;
 458     ram_addr_t initrd_offset;
 459     int bios_size, isa_bios_size, vga_bios_size;
 460     PCIBus *pci_bus;
 461     int piix3_devfn = -1;
 462     CPUState *env;
 463     NICInfo *nd;
 464     qemu_irq *cpu_irq;
 465     qemu_irq *i8259;
 466
 467     linux_boot = (kernel_filename != NULL);
 468
 469     /* init CPUs */
 470     for(i = 0; i < smp_cpus; i++) {
 471         env = cpu_init();
 472         if (i != 0)
 473             env->hflags |= HF_HALTED_MASK;
 474         if (smp_cpus > 1) {
 475             /* XXX: enable it in all cases */
 476             env->cpuid_features |= CPUID_APIC;
 477         }
 478         register_savevm("cpu", i, 4, cpu_save, cpu_load, env);
 479         qemu_register_reset(main_cpu_reset, env);
 480         if (pci_enabled) {
 481             apic_init(env);
 482         }
 483     }
 484
 485     /* allocate RAM */
 486     ram_addr = qemu_ram_alloc(ram_size);
 487     cpu_register_physical_memory(0, ram_size, ram_addr);
 488
 489     /* allocate VGA RAM */
 490     vga_ram_addr = qemu_ram_alloc(vga_ram_size);
 491
 492     /* BIOS load */
 493     snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
 494     bios_size = get_image_size(buf);
 495     if (bios_size <= 0 ||
 496         (bios_size % 65536) != 0) {
 497         goto bios_error;
 498     }
 499     bios_offset = qemu_ram_alloc(bios_size);
 500     ret = load_image(buf, phys_ram_base + bios_offset);
 501     if (ret != bios_size) {
 502     bios_error:
 503         fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", buf);
 504         exit(1);
 505     }
 506
 507     /* VGA BIOS load */
 508     if (cirrus_vga_enabled) {
 509         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_CIRRUS_FILENAME);
 510     } else {
 511         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
 512     }
 513     vga_bios_size = get_image_size(buf);
 514     if (vga_bios_size <= 0 || vga_bios_size > 65536)
 515         goto vga_bios_error;
 516     vga_bios_offset = qemu_ram_alloc(65536);
 517
 518     ret = load_image(buf, phys_ram_base + vga_bios_offset);
 519     if (ret != vga_bios_size) {
 520     vga_bios_error:
 521         fprintf(stderr, "qemu: could not load VGA BIOS '%s'\n", buf);
 522         exit(1);
 523     }
 524
 525     /* setup basic memory access */
 526     cpu_register_physical_memory(0xc0000, 0x10000,
 527                                  vga_bios_offset | IO_MEM_ROM);
 528
 529     /* map the last 128KB of the BIOS in ISA space */
 530     isa_bios_size = bios_size;
 531     if (isa_bios_size > (128 * 1024))
 532         isa_bios_size = 128 * 1024;
 533     cpu_register_physical_memory(0xd0000, (192 * 1024) - isa_bios_size,
 534                                  IO_MEM_UNASSIGNED);
 535     cpu_register_physical_memory(0x100000 - isa_bios_size,
 536                                  isa_bios_size,
 537                                  (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
 538
 539     {
 540         ram_addr_t option_rom_offset;
 541         int size, offset;
 542
 543         offset = 0;
 544         for (i = 0; i < nb_option_roms; i++) {
 545             size = get_image_size(option_rom[i]);
 546             if (size < 0) {
 547                 fprintf(stderr, "Could not load option rom '%s'\n",
 548                         option_rom[i]);
 549                 exit(1);
 550             }
 551             if (size > (0x10000 - offset))
 552                 goto option_rom_error;
 553             option_rom_offset = qemu_ram_alloc(size);
 554             ret = load_image(option_rom[i], phys_ram_base + option_rom_offset);
 555             if (ret != size) {
 556             option_rom_error:
 557                 fprintf(stderr, "Too many option ROMS\n");
 558                 exit(1);
 559             }
 560             size = (size + 4095) & ~4095;
 561             cpu_register_physical_memory(0xd0000 + offset,
 562                                          size, option_rom_offset | IO_MEM_ROM);
 563             offset += size;
 564         }
 565     }
 566
 567     /* map all the bios at the top of memory */
 568     cpu_register_physical_memory((uint32_t)(-bios_size),
 569                                  bios_size, bios_offset | IO_MEM_ROM);
 570
 571     bochs_bios_init();
 572
 573     if (linux_boot) {
 574         uint8_t bootsect[512];
 575         uint8_t old_bootsect[512];
 576
 577         if (bs_table[0] == NULL) {
 578             fprintf(stderr, "A disk image must be given for 'hda' when booting a Linux kernel\n");
 579             exit(1);
 580         }
 581         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, LINUX_BOOT_FILENAME);
 582         ret = load_image(buf, bootsect);
 583         if (ret != sizeof(bootsect)) {
 584             fprintf(stderr, "qemu: could not load linux boot sector '%s'\n",
 585                     buf);
 586             exit(1);
 587         }
 588
 589         if (bdrv_read(bs_table[0], 0, old_bootsect, 1) >= 0) {
 590             /* copy the MSDOS partition table */
 591             memcpy(bootsect + 0x1be, old_bootsect + 0x1be, 0x40);
 592         }
 593
 594         bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));
 595
 596         /* now we can load the kernel */
 597         ret = load_kernel(kernel_filename,
 598                           phys_ram_base + KERNEL_LOAD_ADDR,
 599                           phys_ram_base + KERNEL_PARAMS_ADDR);
 600         if (ret < 0) {
 601             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 602                     kernel_filename);
 603             exit(1);
 604         }
 605
 606         /* load initrd */
 607         initrd_size = 0;
 608         initrd_offset = 0;
 609         if (initrd_filename) {
 610             initrd_size = get_image_size (initrd_filename);
 611             if (initrd_size > 0) {
 612                 initrd_offset = (ram_size - initrd_size) & TARGET_PAGE_MASK;
 613                 /* Leave space for BIOS ACPI tables.  */
 614                 initrd_offset -= ACPI_DATA_SIZE;
 615                 /* Avoid the last 64k to avoid 2.2.x kernel bugs.  */
 616                 initrd_offset -= 0x10000;
 617                 if (initrd_offset > MAX_INITRD_LOAD_ADDR)
 618                     initrd_offset = MAX_INITRD_LOAD_ADDR;
 619
 620                 if (initrd_size > ram_size
 621                     || initrd_offset < KERNEL_LOAD_ADDR + ret) {
 622                     fprintf(stderr,
 623                             "qemu: memory too small for initial ram disk '%s'\n",
 624                             initrd_filename);
 625                     exit(1);
 626                 }
 627                 initrd_size = load_image(initrd_filename,
 628                                          phys_ram_base + initrd_offset);
 629             }
 630             if (initrd_size < 0) {
 631                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 632                         initrd_filename);
 633                 exit(1);
 634             }
 635         }
 636         if (initrd_size > 0) {
 637             stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, initrd_offset);
 638             stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
 639         }
 640         pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
 641                 kernel_cmdline);
 642         stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x20, 0xA33F);
 643         stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x22,
 644                 KERNEL_CMDLINE_ADDR - KERNEL_PARAMS_ADDR);
 645         /* loader type */
 646         stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x210, 0x01);
 647     }
 648
 649     cpu_irq = qemu_allocate_irqs(pic_irq_request, first_cpu, 1);
 650     i8259 = i8259_init(cpu_irq[0]);
 651     ferr_irq = i8259[13];
 652
 653     if (pci_enabled) {
 654         pci_bus = i440fx_init(&i440fx_state, i8259);
 655         piix3_devfn = piix3_init(pci_bus, -1);
 656     } else {
 657         pci_bus = NULL;
 658     }
 659
 660     /* init basic PC hardware */
 661     register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
 662
 663     register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
 664
 665     if (cirrus_vga_enabled) {
 666         if (pci_enabled) {
 667             pci_cirrus_vga_init(pci_bus,
 668                                 ds, phys_ram_base + vga_ram_addr,
 669                                 vga_ram_addr, vga_ram_size);
 670         } else {
 671             isa_cirrus_vga_init(ds, phys_ram_base + vga_ram_addr,
 672                                 vga_ram_addr, vga_ram_size);
 673         }
 674     } else if (vmsvga_enabled) {
 675         if (pci_enabled)
 676             pci_vmsvga_init(pci_bus, ds, phys_ram_base + ram_size,
 677                             ram_size, vga_ram_size);
 678         else
 679             fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
 680     } else {
 681         if (pci_enabled) {
 682             pci_vga_init(pci_bus, ds, phys_ram_base + vga_ram_addr,
 683                          vga_ram_addr, vga_ram_size, 0, 0);
 684         } else {
 685             isa_vga_init(ds, phys_ram_base + vga_ram_addr,
 686                          vga_ram_addr, vga_ram_size);
 687         }
 688     }
 689
 690     rtc_state = rtc_init(0x70, i8259[8]);
 691
 692     register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
 693     register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
 694
 695     if (pci_enabled) {
 696         ioapic = ioapic_init();
 697     }
 698     pit = pit_init(0x40, i8259[0]);
 699     pcspk_init(pit);
 700     if (pci_enabled) {
 701         pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
 702     }
 703
 704     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
 705         if (serial_hds[i]) {
 706             serial_init(serial_io[i], i8259[serial_irq[i]], serial_hds[i]);
 707         }
 708     }
 709
 710     for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
 711         if (parallel_hds[i]) {
 712             parallel_init(parallel_io[i], i8259[parallel_irq[i]],
 713                           parallel_hds[i]);
 714         }
 715     }
 716
 717     for(i = 0; i < nb_nics; i++) {
 718         nd = &nd_table[i];
 719         if (!nd->model) {
 720             if (pci_enabled) {
 721                 nd->model = "ne2k_pci";
 722             } else {
 723                 nd->model = "ne2k_isa";
 724             }
 725         }
 726         if (strcmp(nd->model, "ne2k_isa") == 0) {
 727             pc_init_ne2k_isa(nd, i8259);
 728         } else if (pci_enabled) {
 729             pci_nic_init(pci_bus, nd, -1);
 730         } else {
 731             fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);
 732             exit(1);
 733         }
 734     }
 735
 736     if (pci_enabled) {
 737         pci_piix3_ide_init(pci_bus, bs_table, piix3_devfn + 1, i8259);
 738     } else {
 739         for(i = 0; i < 2; i++) {
 740             isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
 741                          bs_table[2 * i], bs_table[2 * i + 1]);
 742         }
 743     }
 744
 745     i8042_init(i8259[1], i8259[12], 0x60);
 746     DMA_init(0);
 747 #ifdef HAS_AUDIO
 748     audio_init(pci_enabled ? pci_bus : NULL, i8259);
 749 #endif
 750
 751     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd_table);
 752
 753     cmos_init(ram_size, boot_device, bs_table);
 754
 755     if (pci_enabled && usb_enabled) {
 756         usb_uhci_init(pci_bus, piix3_devfn + 2);
 757     }
 758
 759     if (pci_enabled && acpi_enabled) {
 760         uint8_t *eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
 761         piix4_pm_init(pci_bus, piix3_devfn + 3);
 762         for (i = 0; i < 8; i++) {
 763             SMBusDevice *eeprom = smbus_eeprom_device_init(0x50 + i,
 764                 eeprom_buf + (i * 256));
 765             piix4_smbus_register_device(eeprom, 0x50 + i);
 766         }
 767     }
 768
 769     if (i440fx_state) {
 770         i440fx_init_memory_mappings(i440fx_state);
 771     }
 772 #if 0
 773     /* ??? Need to figure out some way for the user to
 774        specify SCSI devices.  */
 775     if (pci_enabled) {
 776         void *scsi;
 777         BlockDriverState *bdrv;
 778
 779         scsi = lsi_scsi_init(pci_bus, -1);
 780         bdrv = bdrv_new("scsidisk");
 781         bdrv_open(bdrv, "scsi_disk.img", 0);
 782         lsi_scsi_attach(scsi, bdrv, -1);
 783         bdrv = bdrv_new("scsicd");
 784         bdrv_open(bdrv, "scsi_cd.iso", 0);
 785         bdrv_set_type_hint(bdrv, BDRV_TYPE_CDROM);
 786         lsi_scsi_attach(scsi, bdrv, -1);
 787     }
 788 #endif
 789 }
 790
 791 static void pc_init_pci(int ram_size, int vga_ram_size, int boot_device,
 792                         DisplayState *ds, const char **fd_filename,
 793                         int snapshot,
 794                         const char *kernel_filename,
 795                         const char *kernel_cmdline,
 796                         const char *initrd_filename,
 797                         const char *cpu_model)
 798 {
 799     pc_init1(ram_size, vga_ram_size, boot_device,
 800              ds, fd_filename, snapshot,
 801              kernel_filename, kernel_cmdline,
 802              initrd_filename, 1);
 803 }
 804
 805 static void pc_init_isa(int ram_size, int vga_ram_size, int boot_device,
 806                         DisplayState *ds, const char **fd_filename,
 807                         int snapshot,
 808                         const char *kernel_filename,
 809                         const char *kernel_cmdline,
 810                         const char *initrd_filename,
 811                         const char *cpu_model)
 812 {
 813     pc_init1(ram_size, vga_ram_size, boot_device,
 814              ds, fd_filename, snapshot,
 815              kernel_filename, kernel_cmdline,
 816              initrd_filename, 0);
 817 }
 818
 819 QEMUMachine pc_machine = {
 820     "pc",
 821     "Standard PC",
 822     pc_init_pci,
 823 };
 824
 825 QEMUMachine isapc_machine = {
 826     "isapc",
 827     "ISA-only PC",
 828     pc_init_isa,
 829 };