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
  33 /* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables.  */
  34 #define ACPI_DATA_SIZE       0x10000
  35
  36 static fdctrl_t *floppy_controller;
  37 static RTCState *rtc_state;
  38 static PITState *pit;
  39 static IOAPICState *ioapic;
  40 static PCIDevice *i440fx_state;
  41
  42 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
  43 {
  44 }
  45
  46 /* MSDOS compatibility mode FPU exception support */
  47 static qemu_irq ferr_irq;
  48 /* XXX: add IGNNE support */
  49 void cpu_set_ferr(CPUX86State *s)
  50 {
  51     qemu_irq_raise(ferr_irq);
  52 }
  53
  54 static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
  55 {
  56     qemu_irq_lower(ferr_irq);
  57 }
  58
  59 /* TSC handling */
  60 uint64_t cpu_get_tsc(CPUX86State *env)
  61 {
  62     /* Note: when using kqemu, it is more logical to return the host TSC
  63        because kqemu does not trap the RDTSC instruction for
  64        performance reasons */
  65 #if USE_KQEMU
  66     if (env->kqemu_enabled) {
  67         return cpu_get_real_ticks();
  68     } else
  69 #endif
  70     {
  71         return cpu_get_ticks();
  72     }
  73 }
  74
  75 /* SMM support */
  76 void cpu_smm_update(CPUState *env)
  77 {
  78     if (i440fx_state && env == first_cpu)
  79         i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
  80 }
  81
  82
  83 /* IRQ handling */
  84 int cpu_get_pic_interrupt(CPUState *env)
  85 {
  86     int intno;
  87
  88     intno = apic_get_interrupt(env);
  89     if (intno >= 0) {
  90         /* set irq request if a PIC irq is still pending */
  91         /* XXX: improve that */
  92         pic_update_irq(isa_pic);
  93         return intno;
  94     }
  95     /* read the irq from the PIC */
  96     intno = pic_read_irq(isa_pic);
  97     return intno;
  98 }
  99
 100 static void pic_irq_request(void *opaque, int irq, int level)
 101 {
 102     CPUState *env = opaque;
 103     if (level)
 104         cpu_interrupt(env, CPU_INTERRUPT_HARD);
 105     else
 106         cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
 107 }
 108
 109 /* PC cmos mappings */
 110
 111 #define REG_EQUIPMENT_BYTE          0x14
 112
 113 static int cmos_get_fd_drive_type(int fd0)
 114 {
 115     int val;
 116
 117     switch (fd0) {
 118     case 0:
 119         /* 1.44 Mb 3"5 drive */
 120         val = 4;
 121         break;
 122     case 1:
 123         /* 2.88 Mb 3"5 drive */
 124         val = 5;
 125         break;
 126     case 2:
 127         /* 1.2 Mb 5"5 drive */
 128         val = 2;
 129         break;
 130     default:
 131         val = 0;
 132         break;
 133     }
 134     return val;
 135 }
 136
 137 static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd)
 138 {
 139     RTCState *s = rtc_state;
 140     int cylinders, heads, sectors;
 141     bdrv_get_geometry_hint(hd, &cylinders, &heads, &sectors);
 142     rtc_set_memory(s, type_ofs, 47);
 143     rtc_set_memory(s, info_ofs, cylinders);
 144     rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
 145     rtc_set_memory(s, info_ofs + 2, heads);
 146     rtc_set_memory(s, info_ofs + 3, 0xff);
 147     rtc_set_memory(s, info_ofs + 4, 0xff);
 148     rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
 149     rtc_set_memory(s, info_ofs + 6, cylinders);
 150     rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
 151     rtc_set_memory(s, info_ofs + 8, sectors);
 152 }
 153
 154 /* hd_table must contain 4 block drivers */
 155 static void cmos_init(int ram_size, int boot_device, BlockDriverState **hd_table)
 156 {
 157     RTCState *s = rtc_state;
 158     int val;
 159     int fd0, fd1, nb;
 160     int i;
 161
 162     /* various important CMOS locations needed by PC/Bochs bios */
 163
 164     /* memory size */
 165     val = 640; /* base memory in K */
 166     rtc_set_memory(s, 0x15, val);
 167     rtc_set_memory(s, 0x16, val >> 8);
 168
 169     val = (ram_size / 1024) - 1024;
 170     if (val > 65535)
 171         val = 65535;
 172     rtc_set_memory(s, 0x17, val);
 173     rtc_set_memory(s, 0x18, val >> 8);
 174     rtc_set_memory(s, 0x30, val);
 175     rtc_set_memory(s, 0x31, val >> 8);
 176
 177     if (ram_size > (16 * 1024 * 1024))
 178         val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
 179     else
 180         val = 0;
 181     if (val > 65535)
 182         val = 65535;
 183     rtc_set_memory(s, 0x34, val);
 184     rtc_set_memory(s, 0x35, val >> 8);
 185
 186     switch(boot_device) {
 187     case 'a':
 188     case 'b':
 189         rtc_set_memory(s, 0x3d, 0x01); /* floppy boot */
 190         if (!fd_bootchk)
 191             rtc_set_memory(s, 0x38, 0x01); /* disable signature check */
 192         break;
 193     default:
 194     case 'c':
 195         rtc_set_memory(s, 0x3d, 0x02); /* hard drive boot */
 196         break;
 197     case 'd':
 198         rtc_set_memory(s, 0x3d, 0x03); /* CD-ROM boot */
 199         break;
 200     case 'n':
 201         rtc_set_memory(s, 0x3d, 0x04); /* Network boot */
 202         break;
 203     }
 204
 205     /* floppy type */
 206
 207     fd0 = fdctrl_get_drive_type(floppy_controller, 0);
 208     fd1 = fdctrl_get_drive_type(floppy_controller, 1);
 209
 210     val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1);
 211     rtc_set_memory(s, 0x10, val);
 212
 213     val = 0;
 214     nb = 0;
 215     if (fd0 < 3)
 216         nb++;
 217     if (fd1 < 3)
 218         nb++;
 219     switch (nb) {
 220     case 0:
 221         break;
 222     case 1:
 223         val |= 0x01; /* 1 drive, ready for boot */
 224         break;
 225     case 2:
 226         val |= 0x41; /* 2 drives, ready for boot */
 227         break;
 228     }
 229     val |= 0x02; /* FPU is there */
 230     val |= 0x04; /* PS/2 mouse installed */
 231     rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
 232
 233     /* hard drives */
 234
 235     rtc_set_memory(s, 0x12, (hd_table[0] ? 0xf0 : 0) | (hd_table[1] ? 0x0f : 0));
 236     if (hd_table[0])
 237         cmos_init_hd(0x19, 0x1b, hd_table[0]);
 238     if (hd_table[1])
 239         cmos_init_hd(0x1a, 0x24, hd_table[1]);
 240
 241     val = 0;
 242     for (i = 0; i < 4; i++) {
 243         if (hd_table[i]) {
 244             int cylinders, heads, sectors, translation;
 245             /* NOTE: bdrv_get_geometry_hint() returns the physical
 246                 geometry.  It is always such that: 1 <= sects <= 63, 1
 247                 <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
 248                 geometry can be different if a translation is done. */
 249             translation = bdrv_get_translation_hint(hd_table[i]);
 250             if (translation == BIOS_ATA_TRANSLATION_AUTO) {
 251                 bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, &sectors);
 252                 if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
 253                     /* No translation. */
 254                     translation = 0;
 255                 } else {
 256                     /* LBA translation. */
 257                     translation = 1;
 258                 }
 259             } else {
 260                 translation--;
 261             }
 262             val |= translation << (i * 2);
 263         }
 264     }
 265     rtc_set_memory(s, 0x39, val);
 266 }
 267
 268 void ioport_set_a20(int enable)
 269 {
 270     /* XXX: send to all CPUs ? */
 271     cpu_x86_set_a20(first_cpu, enable);
 272 }
 273
 274 int ioport_get_a20(void)
 275 {
 276     return ((first_cpu->a20_mask >> 20) & 1);
 277 }
 278
 279 static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
 280 {
 281     ioport_set_a20((val >> 1) & 1);
 282     /* XXX: bit 0 is fast reset */
 283 }
 284
 285 static uint32_t ioport92_read(void *opaque, uint32_t addr)
 286 {
 287     return ioport_get_a20() << 1;
 288 }
 289
 290 /***********************************************************/
 291 /* Bochs BIOS debug ports */
 292
 293 void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
 294 {
 295     static const char shutdown_str[8] = "Shutdown";
 296     static int shutdown_index = 0;
 297
 298     switch(addr) {
 299         /* Bochs BIOS messages */
 300     case 0x400:
 301     case 0x401:
 302         fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
 303         exit(1);
 304     case 0x402:
 305     case 0x403:
 306 #ifdef DEBUG_BIOS
 307         fprintf(stderr, "%c", val);
 308 #endif
 309         break;
 310     case 0x8900:
 311         /* same as Bochs power off */
 312         if (val == shutdown_str[shutdown_index]) {
 313             shutdown_index++;
 314             if (shutdown_index == 8) {
 315                 shutdown_index = 0;
 316                 qemu_system_shutdown_request();
 317             }
 318         } else {
 319             shutdown_index = 0;
 320         }
 321         break;
 322
 323         /* LGPL'ed VGA BIOS messages */
 324     case 0x501:
 325     case 0x502:
 326         fprintf(stderr, "VGA BIOS panic, line %d\n", val);
 327         exit(1);
 328     case 0x500:
 329     case 0x503:
 330 #ifdef DEBUG_BIOS
 331         fprintf(stderr, "%c", val);
 332 #endif
 333         break;
 334     }
 335 }
 336
 337 void bochs_bios_init(void)
 338 {
 339     register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
 340     register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
 341     register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
 342     register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
 343     register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);
 344
 345     register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
 346     register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
 347     register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
 348     register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
 349 }
 350
 351 /* Generate an initial boot sector which sets state and jump to
 352    a specified vector */
 353 static void generate_bootsect(uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
 354 {
 355     uint8_t bootsect[512], *p;
 356     int i;
 357
 358     if (bs_table[0] == NULL) {
 359         fprintf(stderr, "A disk image must be given for 'hda' when booting "
 360                 "a Linux kernel\n");
 361         exit(1);
 362     }
 363
 364     memset(bootsect, 0, sizeof(bootsect));
 365
 366     /* Copy the MSDOS partition table if possible */
 367     bdrv_read(bs_table[0], 0, bootsect, 1);
 368
 369     /* Make sure we have a partition signature */
 370     bootsect[510] = 0x55;
 371     bootsect[511] = 0xaa;
 372
 373     /* Actual code */
 374     p = bootsect;
 375     *p++ = 0xfa;                /* CLI */
 376     *p++ = 0xfc;                /* CLD */
 377
 378     for (i = 0; i < 6; i++) {
 379         if (i == 1)             /* Skip CS */
 380             continue;
 381
 382         *p++ = 0xb8;            /* MOV AX,imm16 */
 383         *p++ = segs[i];
 384         *p++ = segs[i] >> 8;
 385         *p++ = 0x8e;            /* MOV <seg>,AX */
 386         *p++ = 0xc0 + (i << 3);
 387     }
 388
 389     for (i = 0; i < 8; i++) {
 390         *p++ = 0x66;            /* 32-bit operand size */
 391         *p++ = 0xb8 + i;        /* MOV <reg>,imm32 */
 392         *p++ = gpr[i];
 393         *p++ = gpr[i] >> 8;
 394         *p++ = gpr[i] >> 16;
 395         *p++ = gpr[i] >> 24;
 396     }
 397
 398     *p++ = 0xea;                /* JMP FAR */
 399     *p++ = ip;                  /* IP */
 400     *p++ = ip >> 8;
 401     *p++ = segs[1];             /* CS */
 402     *p++ = segs[1] >> 8;
 403
 404     bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));
 405 }
 406
 407 int load_kernel(const char *filename, uint8_t *addr,
 408                 uint8_t *real_addr)
 409 {
 410     int fd, size;
 411     int setup_sects;
 412
 413     fd = open(filename, O_RDONLY | O_BINARY);
 414     if (fd < 0)
 415         return -1;
 416
 417     /* load 16 bit code */
 418     if (read(fd, real_addr, 512) != 512)
 419         goto fail;
 420     setup_sects = real_addr[0x1F1];
 421     if (!setup_sects)
 422         setup_sects = 4;
 423     if (read(fd, real_addr + 512, setup_sects * 512) !=
 424         setup_sects * 512)
 425         goto fail;
 426
 427     /* load 32 bit code */
 428     size = read(fd, addr, 16 * 1024 * 1024);
 429     if (size < 0)
 430         goto fail;
 431     close(fd);
 432     return size;
 433  fail:
 434     close(fd);
 435     return -1;
 436 }
 437
 438 static long get_file_size(FILE *f)
 439 {
 440     long where, size;
 441
 442     /* XXX: on Unix systems, using fstat() probably makes more sense */
 443
 444     where = ftell(f);
 445     fseek(f, 0, SEEK_END);
 446     size = ftell(f);
 447     fseek(f, where, SEEK_SET);
 448
 449     return size;
 450 }
 451
 452 static void load_linux(const char *kernel_filename,
 453                        const char *initrd_filename,
 454                        const char *kernel_cmdline)
 455 {
 456     uint16_t protocol;
 457     uint32_t gpr[8];
 458     uint16_t seg[6];
 459     uint16_t real_seg;
 460     int setup_size, kernel_size, initrd_size, cmdline_size;
 461     uint32_t initrd_max;
 462     uint8_t header[1024];
 463     uint8_t *real_addr, *prot_addr, *cmdline_addr, *initrd_addr;
 464     FILE *f, *fi;
 465
 466     /* Align to 16 bytes as a paranoia measure */
 467     cmdline_size = (strlen(kernel_cmdline)+16) & ~15;
 468
 469     /* load the kernel header */
 470     f = fopen(kernel_filename, "rb");
 471     if (!f || !(kernel_size = get_file_size(f)) ||
 472         fread(header, 1, 1024, f) != 1024) {
 473         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 474                 kernel_filename);
 475         exit(1);
 476     }
 477
 478     /* kernel protocol version */
 479     fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
 480     if (ldl_p(header+0x202) == 0x53726448)
 481         protocol = lduw_p(header+0x206);
 482     else
 483         protocol = 0;
 484
 485     if (protocol < 0x200 || !(header[0x211] & 0x01)) {
 486         /* Low kernel */
 487         real_addr    = phys_ram_base + 0x90000;
 488         cmdline_addr = phys_ram_base + 0x9a000 - cmdline_size;
 489         prot_addr    = phys_ram_base + 0x10000;
 490     } else if (protocol < 0x202) {
 491         /* High but ancient kernel */
 492         real_addr    = phys_ram_base + 0x90000;
 493         cmdline_addr = phys_ram_base + 0x9a000 - cmdline_size;
 494         prot_addr    = phys_ram_base + 0x100000;
 495     } else {
 496         /* High and recent kernel */
 497         real_addr    = phys_ram_base + 0x10000;
 498         cmdline_addr = phys_ram_base + 0x20000;
 499         prot_addr    = phys_ram_base + 0x100000;
 500     }
 501
 502     fprintf(stderr,
 503             "qemu: real_addr     = %#zx\n"
 504             "qemu: cmdline_addr  = %#zx\n"
 505             "qemu: prot_addr     = %#zx\n",
 506             real_addr-phys_ram_base,
 507             cmdline_addr-phys_ram_base,
 508             prot_addr-phys_ram_base);
 509
 510     /* highest address for loading the initrd */
 511     if (protocol >= 0x203)
 512         initrd_max = ldl_p(header+0x22c);
 513     else
 514         initrd_max = 0x37ffffff;
 515
 516     if (initrd_max >= ram_size-ACPI_DATA_SIZE)
 517         initrd_max = ram_size-ACPI_DATA_SIZE-1;
 518
 519     /* kernel command line */
 520     pstrcpy(cmdline_addr, 4096, kernel_cmdline);
 521
 522     if (protocol >= 0x202) {
 523         stl_p(header+0x228, cmdline_addr-phys_ram_base);
 524     } else {
 525         stw_p(header+0x20, 0xA33F);
 526         stw_p(header+0x22, cmdline_addr-real_addr);
 527     }
 528
 529     /* loader type */
 530     /* High nybble = B reserved for Qemu; low nybble is revision number.
 531        If this code is substantially changed, you may want to consider
 532        incrementing the revision. */
 533     if (protocol >= 0x200)
 534         header[0x210] = 0xB0;
 535
 536     /* heap */
 537     if (protocol >= 0x201) {
 538         header[0x211] |= 0x80;  /* CAN_USE_HEAP */
 539         stw_p(header+0x224, cmdline_addr-real_addr-0x200);
 540     }
 541
 542     /* load initrd */
 543     if (initrd_filename) {
 544         if (protocol < 0x200) {
 545             fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
 546             exit(1);
 547         }
 548
 549         fi = fopen(initrd_filename, "rb");
 550         if (!fi) {
 551             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 552                     initrd_filename);
 553             exit(1);
 554         }
 555
 556         initrd_size = get_file_size(fi);
 557         initrd_addr = phys_ram_base + ((initrd_max-initrd_size) & ~4095);
 558
 559         fprintf(stderr, "qemu: loading initrd (%#x bytes) at %#zx\n",
 560                 initrd_size, initrd_addr-phys_ram_base);
 561
 562         if (fread(initrd_addr, 1, initrd_size, fi) != initrd_size) {
 563             fprintf(stderr, "qemu: read error on initial ram disk '%s'\n",
 564                     initrd_filename);
 565             exit(1);
 566         }
 567         fclose(fi);
 568
 569         stl_p(header+0x218, initrd_addr-phys_ram_base);
 570         stl_p(header+0x21c, initrd_size);
 571     }
 572
 573     /* store the finalized header and load the rest of the kernel */
 574     memcpy(real_addr, header, 1024);
 575
 576     setup_size = header[0x1f1];
 577     if (setup_size == 0)
 578         setup_size = 4;
 579
 580     setup_size = (setup_size+1)*512;
 581     kernel_size -= setup_size;  /* Size of protected-mode code */
 582
 583     if (fread(real_addr+1024, 1, setup_size-1024, f) != setup_size-1024 ||
 584         fread(prot_addr, 1, kernel_size, f) != kernel_size) {
 585         fprintf(stderr, "qemu: read error on kernel '%s'\n",
 586                 kernel_filename);
 587         exit(1);
 588     }
 589     fclose(f);
 590
 591     /* generate bootsector to set up the initial register state */
 592     real_seg = (real_addr-phys_ram_base) >> 4;
 593     seg[0] = seg[2] = seg[3] = seg[4] = seg[4] = real_seg;
 594     seg[1] = real_seg+0x20;     /* CS */
 595     memset(gpr, 0, sizeof gpr);
 596     gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
 597
 598     generate_bootsect(gpr, seg, 0);
 599 }
 600
 601 static void main_cpu_reset(void *opaque)
 602 {
 603     CPUState *env = opaque;
 604     cpu_reset(env);
 605 }
 606
 607 static const int ide_iobase[2] = { 0x1f0, 0x170 };
 608 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
 609 static const int ide_irq[2] = { 14, 15 };
 610
 611 #define NE2000_NB_MAX 6
 612
 613 static int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
 614 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
 615
 616 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
 617 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
 618
 619 static int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
 620 static int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
 621
 622 #ifdef HAS_AUDIO
 623 static void audio_init (PCIBus *pci_bus, qemu_irq *pic)
 624 {
 625     struct soundhw *c;
 626     int audio_enabled = 0;
 627
 628     for (c = soundhw; !audio_enabled && c->name; ++c) {
 629         audio_enabled = c->enabled;
 630     }
 631
 632     if (audio_enabled) {
 633         AudioState *s;
 634
 635         s = AUD_init ();
 636         if (s) {
 637             for (c = soundhw; c->name; ++c) {
 638                 if (c->enabled) {
 639                     if (c->isa) {
 640                         c->init.init_isa (s, pic);
 641                     }
 642                     else {
 643                         if (pci_bus) {
 644                             c->init.init_pci (pci_bus, s);
 645                         }
 646                     }
 647                 }
 648             }
 649         }
 650     }
 651 }
 652 #endif
 653
 654 static void pc_init_ne2k_isa(NICInfo *nd, qemu_irq *pic)
 655 {
 656     static int nb_ne2k = 0;
 657
 658     if (nb_ne2k == NE2000_NB_MAX)
 659         return;
 660     isa_ne2000_init(ne2000_io[nb_ne2k], pic[ne2000_irq[nb_ne2k]], nd);
 661     nb_ne2k++;
 662 }
 663
 664 /* PC hardware initialisation */
 665 static void pc_init1(int ram_size, int vga_ram_size, int boot_device,
 666                      DisplayState *ds, const char **fd_filename, int snapshot,
 667                      const char *kernel_filename, const char *kernel_cmdline,
 668                      const char *initrd_filename,
 669                      int pci_enabled)
 670 {
 671     char buf[1024];
 672     int ret, linux_boot, i;
 673     ram_addr_t ram_addr, vga_ram_addr, bios_offset, vga_bios_offset;
 674     int bios_size, isa_bios_size, vga_bios_size;
 675     PCIBus *pci_bus;
 676     int piix3_devfn = -1;
 677     CPUState *env;
 678     NICInfo *nd;
 679     qemu_irq *cpu_irq;
 680     qemu_irq *i8259;
 681
 682     linux_boot = (kernel_filename != NULL);
 683
 684     /* init CPUs */
 685     for(i = 0; i < smp_cpus; i++) {
 686         env = cpu_init();
 687         if (i != 0)
 688             env->hflags |= HF_HALTED_MASK;
 689         if (smp_cpus > 1) {
 690             /* XXX: enable it in all cases */
 691             env->cpuid_features |= CPUID_APIC;
 692         }
 693         register_savevm("cpu", i, 4, cpu_save, cpu_load, env);
 694         qemu_register_reset(main_cpu_reset, env);
 695         if (pci_enabled) {
 696             apic_init(env);
 697         }
 698         vmport_init(env);
 699     }
 700
 701     /* allocate RAM */
 702     ram_addr = qemu_ram_alloc(ram_size);
 703     cpu_register_physical_memory(0, ram_size, ram_addr);
 704
 705     /* allocate VGA RAM */
 706     vga_ram_addr = qemu_ram_alloc(vga_ram_size);
 707
 708     /* BIOS load */
 709     snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
 710     bios_size = get_image_size(buf);
 711     if (bios_size <= 0 ||
 712         (bios_size % 65536) != 0) {
 713         goto bios_error;
 714     }
 715     bios_offset = qemu_ram_alloc(bios_size);
 716     ret = load_image(buf, phys_ram_base + bios_offset);
 717     if (ret != bios_size) {
 718     bios_error:
 719         fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", buf);
 720         exit(1);
 721     }
 722
 723     /* VGA BIOS load */
 724     if (cirrus_vga_enabled) {
 725         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_CIRRUS_FILENAME);
 726     } else {
 727         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
 728     }
 729     vga_bios_size = get_image_size(buf);
 730     if (vga_bios_size <= 0 || vga_bios_size > 65536)
 731         goto vga_bios_error;
 732     vga_bios_offset = qemu_ram_alloc(65536);
 733
 734     ret = load_image(buf, phys_ram_base + vga_bios_offset);
 735     if (ret != vga_bios_size) {
 736     vga_bios_error:
 737         fprintf(stderr, "qemu: could not load VGA BIOS '%s'\n", buf);
 738         exit(1);
 739     }
 740
 741     /* setup basic memory access */
 742     cpu_register_physical_memory(0xc0000, 0x10000,
 743                                  vga_bios_offset | IO_MEM_ROM);
 744
 745     /* map the last 128KB of the BIOS in ISA space */
 746     isa_bios_size = bios_size;
 747     if (isa_bios_size > (128 * 1024))
 748         isa_bios_size = 128 * 1024;
 749     cpu_register_physical_memory(0xd0000, (192 * 1024) - isa_bios_size,
 750                                  IO_MEM_UNASSIGNED);
 751     cpu_register_physical_memory(0x100000 - isa_bios_size,
 752                                  isa_bios_size,
 753                                  (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
 754
 755     {
 756         ram_addr_t option_rom_offset;
 757         int size, offset;
 758
 759         offset = 0;
 760         for (i = 0; i < nb_option_roms; i++) {
 761             size = get_image_size(option_rom[i]);
 762             if (size < 0) {
 763                 fprintf(stderr, "Could not load option rom '%s'\n",
 764                         option_rom[i]);
 765                 exit(1);
 766             }
 767             if (size > (0x10000 - offset))
 768                 goto option_rom_error;
 769             option_rom_offset = qemu_ram_alloc(size);
 770             ret = load_image(option_rom[i], phys_ram_base + option_rom_offset);
 771             if (ret != size) {
 772             option_rom_error:
 773                 fprintf(stderr, "Too many option ROMS\n");
 774                 exit(1);
 775             }
 776             size = (size + 4095) & ~4095;
 777             cpu_register_physical_memory(0xd0000 + offset,
 778                                          size, option_rom_offset | IO_MEM_ROM);
 779             offset += size;
 780         }
 781     }
 782
 783     /* map all the bios at the top of memory */
 784     cpu_register_physical_memory((uint32_t)(-bios_size),
 785                                  bios_size, bios_offset | IO_MEM_ROM);
 786
 787     bochs_bios_init();
 788
 789     if (linux_boot)
 790         load_linux(kernel_filename, initrd_filename, kernel_cmdline);
 791
 792     cpu_irq = qemu_allocate_irqs(pic_irq_request, first_cpu, 1);
 793     i8259 = i8259_init(cpu_irq[0]);
 794     ferr_irq = i8259[13];
 795
 796     if (pci_enabled) {
 797         pci_bus = i440fx_init(&i440fx_state, i8259);
 798         piix3_devfn = piix3_init(pci_bus, -1);
 799     } else {
 800         pci_bus = NULL;
 801     }
 802
 803     /* init basic PC hardware */
 804     register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
 805
 806     register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
 807
 808     if (cirrus_vga_enabled) {
 809         if (pci_enabled) {
 810             pci_cirrus_vga_init(pci_bus,
 811                                 ds, phys_ram_base + vga_ram_addr,
 812                                 vga_ram_addr, vga_ram_size);
 813         } else {
 814             isa_cirrus_vga_init(ds, phys_ram_base + vga_ram_addr,
 815                                 vga_ram_addr, vga_ram_size);
 816         }
 817     } else if (vmsvga_enabled) {
 818         if (pci_enabled)
 819             pci_vmsvga_init(pci_bus, ds, phys_ram_base + ram_size,
 820                             ram_size, vga_ram_size);
 821         else
 822             fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
 823     } else {
 824         if (pci_enabled) {
 825             pci_vga_init(pci_bus, ds, phys_ram_base + vga_ram_addr,
 826                          vga_ram_addr, vga_ram_size, 0, 0);
 827         } else {
 828             isa_vga_init(ds, phys_ram_base + vga_ram_addr,
 829                          vga_ram_addr, vga_ram_size);
 830         }
 831     }
 832
 833     rtc_state = rtc_init(0x70, i8259[8]);
 834
 835     register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
 836     register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
 837
 838     if (pci_enabled) {
 839         ioapic = ioapic_init();
 840     }
 841     pit = pit_init(0x40, i8259[0]);
 842     pcspk_init(pit);
 843     if (pci_enabled) {
 844         pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
 845     }
 846
 847     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
 848         if (serial_hds[i]) {
 849             serial_init(serial_io[i], i8259[serial_irq[i]], serial_hds[i]);
 850         }
 851     }
 852
 853     for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
 854         if (parallel_hds[i]) {
 855             parallel_init(parallel_io[i], i8259[parallel_irq[i]],
 856                           parallel_hds[i]);
 857         }
 858     }
 859
 860     for(i = 0; i < nb_nics; i++) {
 861         nd = &nd_table[i];
 862         if (!nd->model) {
 863             if (pci_enabled) {
 864                 nd->model = "ne2k_pci";
 865             } else {
 866                 nd->model = "ne2k_isa";
 867             }
 868         }
 869         if (strcmp(nd->model, "ne2k_isa") == 0) {
 870             pc_init_ne2k_isa(nd, i8259);
 871         } else if (pci_enabled) {
 872             if (strcmp(nd->model, "?") == 0)
 873                 fprintf(stderr, "qemu: Supported ISA NICs: ne2k_isa\n");
 874             pci_nic_init(pci_bus, nd, -1);
 875         } else if (strcmp(nd->model, "?") == 0) {
 876             fprintf(stderr, "qemu: Supported ISA NICs: ne2k_isa\n");
 877             exit(1);
 878         } else {
 879             fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);
 880             exit(1);
 881         }
 882     }
 883
 884     if (pci_enabled) {
 885         pci_piix3_ide_init(pci_bus, bs_table, piix3_devfn + 1, i8259);
 886     } else {
 887         for(i = 0; i < 2; i++) {
 888             isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
 889                          bs_table[2 * i], bs_table[2 * i + 1]);
 890         }
 891     }
 892
 893     i8042_init(i8259[1], i8259[12], 0x60);
 894     DMA_init(0);
 895 #ifdef HAS_AUDIO
 896     audio_init(pci_enabled ? pci_bus : NULL, i8259);
 897 #endif
 898
 899     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd_table);
 900
 901     cmos_init(ram_size, boot_device, bs_table);
 902
 903     if (pci_enabled && usb_enabled) {
 904         usb_uhci_piix3_init(pci_bus, piix3_devfn + 2);
 905     }
 906
 907     if (pci_enabled && acpi_enabled) {
 908         uint8_t *eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
 909         i2c_bus *smbus;
 910
 911         /* TODO: Populate SPD eeprom data.  */
 912         smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100);
 913         for (i = 0; i < 8; i++) {
 914             smbus_eeprom_device_init(smbus, 0x50 + i, eeprom_buf + (i * 256));
 915         }
 916     }
 917
 918     if (i440fx_state) {
 919         i440fx_init_memory_mappings(i440fx_state);
 920     }
 921 #if 0
 922     /* ??? Need to figure out some way for the user to
 923        specify SCSI devices.  */
 924     if (pci_enabled) {
 925         void *scsi;
 926         BlockDriverState *bdrv;
 927
 928         scsi = lsi_scsi_init(pci_bus, -1);
 929         bdrv = bdrv_new("scsidisk");
 930         bdrv_open(bdrv, "scsi_disk.img", 0);
 931         lsi_scsi_attach(scsi, bdrv, -1);
 932         bdrv = bdrv_new("scsicd");
 933         bdrv_open(bdrv, "scsi_cd.iso", 0);
 934         bdrv_set_type_hint(bdrv, BDRV_TYPE_CDROM);
 935         lsi_scsi_attach(scsi, bdrv, -1);
 936     }
 937 #endif
 938 }
 939
 940 static void pc_init_pci(int ram_size, int vga_ram_size, int boot_device,
 941                         DisplayState *ds, const char **fd_filename,
 942                         int snapshot,
 943                         const char *kernel_filename,
 944                         const char *kernel_cmdline,
 945                         const char *initrd_filename,
 946                         const char *cpu_model)
 947 {
 948     pc_init1(ram_size, vga_ram_size, boot_device,
 949              ds, fd_filename, snapshot,
 950              kernel_filename, kernel_cmdline,
 951              initrd_filename, 1);
 952 }
 953
 954 static void pc_init_isa(int ram_size, int vga_ram_size, int boot_device,
 955                         DisplayState *ds, const char **fd_filename,
 956                         int snapshot,
 957                         const char *kernel_filename,
 958                         const char *kernel_cmdline,
 959                         const char *initrd_filename,
 960                         const char *cpu_model)
 961 {
 962     pc_init1(ram_size, vga_ram_size, boot_device,
 963              ds, fd_filename, snapshot,
 964              kernel_filename, kernel_cmdline,
 965              initrd_filename, 0);
 966 }
 967
 968 QEMUMachine pc_machine = {
 969     "pc",
 970     "Standard PC",
 971     pc_init_pci,
 972 };
 973
 974 QEMUMachine isapc_machine = {
 975     "isapc",
 976     "ISA-only PC",
 977     pc_init_isa,
 978 };