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 "fdc.h"
  27 #include "pci.h"
  28 #include "block.h"
  29 #include "sysemu.h"
  30 #include "audio/audio.h"
  31 #include "net.h"
  32 #include "smbus.h"
  33 #include "boards.h"
  34 #include "console.h"
  35
  36 /* output Bochs bios info messages */
  37 //#define DEBUG_BIOS
  38
  39 #define BIOS_FILENAME "bios.bin"
  40 #define VGABIOS_FILENAME "vgabios.bin"
  41 #define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"
  42
  43 #define PC_MAX_BIOS_SIZE (4 * 1024 * 1024)
  44
  45 /* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables.  */
  46 #define ACPI_DATA_SIZE       0x10000
  47
  48 #define MAX_IDE_BUS 2
  49
  50 static fdctrl_t *floppy_controller;
  51 static RTCState *rtc_state;
  52 static PITState *pit;
  53 static IOAPICState *ioapic;
  54 static PCIDevice *i440fx_state;
  55
  56 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
  57 {
  58 }
  59
  60 /* MSDOS compatibility mode FPU exception support */
  61 static qemu_irq ferr_irq;
  62 /* XXX: add IGNNE support */
  63 void cpu_set_ferr(CPUX86State *s)
  64 {
  65     qemu_irq_raise(ferr_irq);
  66 }
  67
  68 static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
  69 {
  70     qemu_irq_lower(ferr_irq);
  71 }
  72
  73 /* TSC handling */
  74 uint64_t cpu_get_tsc(CPUX86State *env)
  75 {
  76     /* Note: when using kqemu, it is more logical to return the host TSC
  77        because kqemu does not trap the RDTSC instruction for
  78        performance reasons */
  79 #if USE_KQEMU
  80     if (env->kqemu_enabled) {
  81         return cpu_get_real_ticks();
  82     } else
  83 #endif
  84     {
  85         return cpu_get_ticks();
  86     }
  87 }
  88
  89 /* SMM support */
  90 void cpu_smm_update(CPUState *env)
  91 {
  92     if (i440fx_state && env == first_cpu)
  93         i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
  94 }
  95
  96
  97 /* IRQ handling */
  98 int cpu_get_pic_interrupt(CPUState *env)
  99 {
 100     int intno;
 101
 102     intno = apic_get_interrupt(env);
 103     if (intno >= 0) {
 104         /* set irq request if a PIC irq is still pending */
 105         /* XXX: improve that */
 106         pic_update_irq(isa_pic);
 107         return intno;
 108     }
 109     /* read the irq from the PIC */
 110     if (!apic_accept_pic_intr(env))
 111         return -1;
 112
 113     intno = pic_read_irq(isa_pic);
 114     return intno;
 115 }
 116
 117 static void pic_irq_request(void *opaque, int irq, int level)
 118 {
 119     CPUState *env = first_cpu;
 120
 121     if (!level)
 122         return;
 123
 124     while (env) {
 125         if (apic_accept_pic_intr(env))
 126             apic_local_deliver(env, APIC_LINT0);
 127         env = env->next_cpu;
 128     }
 129 }
 130
 131 /* PC cmos mappings */
 132
 133 #define REG_EQUIPMENT_BYTE          0x14
 134
 135 static int cmos_get_fd_drive_type(int fd0)
 136 {
 137     int val;
 138
 139     switch (fd0) {
 140     case 0:
 141         /* 1.44 Mb 3"5 drive */
 142         val = 4;
 143         break;
 144     case 1:
 145         /* 2.88 Mb 3"5 drive */
 146         val = 5;
 147         break;
 148     case 2:
 149         /* 1.2 Mb 5"5 drive */
 150         val = 2;
 151         break;
 152     default:
 153         val = 0;
 154         break;
 155     }
 156     return val;
 157 }
 158
 159 static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd)
 160 {
 161     RTCState *s = rtc_state;
 162     int cylinders, heads, sectors;
 163     bdrv_get_geometry_hint(hd, &cylinders, &heads, &sectors);
 164     rtc_set_memory(s, type_ofs, 47);
 165     rtc_set_memory(s, info_ofs, cylinders);
 166     rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
 167     rtc_set_memory(s, info_ofs + 2, heads);
 168     rtc_set_memory(s, info_ofs + 3, 0xff);
 169     rtc_set_memory(s, info_ofs + 4, 0xff);
 170     rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
 171     rtc_set_memory(s, info_ofs + 6, cylinders);
 172     rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
 173     rtc_set_memory(s, info_ofs + 8, sectors);
 174 }
 175
 176 /* convert boot_device letter to something recognizable by the bios */
 177 static int boot_device2nibble(char boot_device)
 178 {
 179     switch(boot_device) {
 180     case 'a':
 181     case 'b':
 182         return 0x01; /* floppy boot */
 183     case 'c':
 184         return 0x02; /* hard drive boot */
 185     case 'd':
 186         return 0x03; /* CD-ROM boot */
 187     case 'n':
 188         return 0x04; /* Network boot */
 189     }
 190     return 0;
 191 }
 192
 193 /* copy/pasted from cmos_init, should be made a general function
 194  and used there as well */
 195 static int pc_boot_set(void *opaque, const char *boot_device)
 196 {
 197 #define PC_MAX_BOOT_DEVICES 3
 198     RTCState *s = (RTCState *)opaque;
 199     int nbds, bds[3] = { 0, };
 200     int i;
 201
 202     nbds = strlen(boot_device);
 203     if (nbds > PC_MAX_BOOT_DEVICES) {
 204         term_printf("Too many boot devices for PC\n");
 205         return(1);
 206     }
 207     for (i = 0; i < nbds; i++) {
 208         bds[i] = boot_device2nibble(boot_device[i]);
 209         if (bds[i] == 0) {
 210             term_printf("Invalid boot device for PC: '%c'\n",
 211                     boot_device[i]);
 212             return(1);
 213         }
 214     }
 215     rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
 216     rtc_set_memory(s, 0x38, (bds[2] << 4));
 217     return(0);
 218 }
 219
 220 /* hd_table must contain 4 block drivers */
 221 static void cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
 222                       const char *boot_device, BlockDriverState **hd_table)
 223 {
 224     RTCState *s = rtc_state;
 225     int nbds, bds[3] = { 0, };
 226     int val;
 227     int fd0, fd1, nb;
 228     int i;
 229
 230     /* various important CMOS locations needed by PC/Bochs bios */
 231
 232     /* memory size */
 233     val = 640; /* base memory in K */
 234     rtc_set_memory(s, 0x15, val);
 235     rtc_set_memory(s, 0x16, val >> 8);
 236
 237     val = (ram_size / 1024) - 1024;
 238     if (val > 65535)
 239         val = 65535;
 240     rtc_set_memory(s, 0x17, val);
 241     rtc_set_memory(s, 0x18, val >> 8);
 242     rtc_set_memory(s, 0x30, val);
 243     rtc_set_memory(s, 0x31, val >> 8);
 244
 245     if (above_4g_mem_size) {
 246         rtc_set_memory(s, 0x5b, (unsigned int)above_4g_mem_size >> 16);
 247         rtc_set_memory(s, 0x5c, (unsigned int)above_4g_mem_size >> 24);
 248         rtc_set_memory(s, 0x5d, (uint64_t)above_4g_mem_size >> 32);
 249     }
 250
 251     if (ram_size > (16 * 1024 * 1024))
 252         val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
 253     else
 254         val = 0;
 255     if (val > 65535)
 256         val = 65535;
 257     rtc_set_memory(s, 0x34, val);
 258     rtc_set_memory(s, 0x35, val >> 8);
 259
 260     /* set the number of CPU */
 261     rtc_set_memory(s, 0x5f, smp_cpus - 1);
 262
 263     /* set boot devices, and disable floppy signature check if requested */
 264 #define PC_MAX_BOOT_DEVICES 3
 265     nbds = strlen(boot_device);
 266     if (nbds > PC_MAX_BOOT_DEVICES) {
 267         fprintf(stderr, "Too many boot devices for PC\n");
 268         exit(1);
 269     }
 270     for (i = 0; i < nbds; i++) {
 271         bds[i] = boot_device2nibble(boot_device[i]);
 272         if (bds[i] == 0) {
 273             fprintf(stderr, "Invalid boot device for PC: '%c'\n",
 274                     boot_device[i]);
 275             exit(1);
 276         }
 277     }
 278     rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
 279     rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ?  0x0 : 0x1));
 280
 281     /* floppy type */
 282
 283     fd0 = fdctrl_get_drive_type(floppy_controller, 0);
 284     fd1 = fdctrl_get_drive_type(floppy_controller, 1);
 285
 286     val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1);
 287     rtc_set_memory(s, 0x10, val);
 288
 289     val = 0;
 290     nb = 0;
 291     if (fd0 < 3)
 292         nb++;
 293     if (fd1 < 3)
 294         nb++;
 295     switch (nb) {
 296     case 0:
 297         break;
 298     case 1:
 299         val |= 0x01; /* 1 drive, ready for boot */
 300         break;
 301     case 2:
 302         val |= 0x41; /* 2 drives, ready for boot */
 303         break;
 304     }
 305     val |= 0x02; /* FPU is there */
 306     val |= 0x04; /* PS/2 mouse installed */
 307     rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
 308
 309     /* hard drives */
 310
 311     rtc_set_memory(s, 0x12, (hd_table[0] ? 0xf0 : 0) | (hd_table[1] ? 0x0f : 0));
 312     if (hd_table[0])
 313         cmos_init_hd(0x19, 0x1b, hd_table[0]);
 314     if (hd_table[1])
 315         cmos_init_hd(0x1a, 0x24, hd_table[1]);
 316
 317     val = 0;
 318     for (i = 0; i < 4; i++) {
 319         if (hd_table[i]) {
 320             int cylinders, heads, sectors, translation;
 321             /* NOTE: bdrv_get_geometry_hint() returns the physical
 322                 geometry.  It is always such that: 1 <= sects <= 63, 1
 323                 <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
 324                 geometry can be different if a translation is done. */
 325             translation = bdrv_get_translation_hint(hd_table[i]);
 326             if (translation == BIOS_ATA_TRANSLATION_AUTO) {
 327                 bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, &sectors);
 328                 if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
 329                     /* No translation. */
 330                     translation = 0;
 331                 } else {
 332                     /* LBA translation. */
 333                     translation = 1;
 334                 }
 335             } else {
 336                 translation--;
 337             }
 338             val |= translation << (i * 2);
 339         }
 340     }
 341     rtc_set_memory(s, 0x39, val);
 342 }
 343
 344 void ioport_set_a20(int enable)
 345 {
 346     /* XXX: send to all CPUs ? */
 347     cpu_x86_set_a20(first_cpu, enable);
 348 }
 349
 350 int ioport_get_a20(void)
 351 {
 352     return ((first_cpu->a20_mask >> 20) & 1);
 353 }
 354
 355 static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
 356 {
 357     ioport_set_a20((val >> 1) & 1);
 358     /* XXX: bit 0 is fast reset */
 359 }
 360
 361 static uint32_t ioport92_read(void *opaque, uint32_t addr)
 362 {
 363     return ioport_get_a20() << 1;
 364 }
 365
 366 /***********************************************************/
 367 /* Bochs BIOS debug ports */
 368
 369 static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
 370 {
 371     static const char shutdown_str[8] = "Shutdown";
 372     static int shutdown_index = 0;
 373
 374     switch(addr) {
 375         /* Bochs BIOS messages */
 376     case 0x400:
 377     case 0x401:
 378         fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
 379         exit(1);
 380     case 0x402:
 381     case 0x403:
 382 #ifdef DEBUG_BIOS
 383         fprintf(stderr, "%c", val);
 384 #endif
 385         break;
 386     case 0x8900:
 387         /* same as Bochs power off */
 388         if (val == shutdown_str[shutdown_index]) {
 389             shutdown_index++;
 390             if (shutdown_index == 8) {
 391                 shutdown_index = 0;
 392                 qemu_system_shutdown_request();
 393             }
 394         } else {
 395             shutdown_index = 0;
 396         }
 397         break;
 398
 399         /* LGPL'ed VGA BIOS messages */
 400     case 0x501:
 401     case 0x502:
 402         fprintf(stderr, "VGA BIOS panic, line %d\n", val);
 403         exit(1);
 404     case 0x500:
 405     case 0x503:
 406 #ifdef DEBUG_BIOS
 407         fprintf(stderr, "%c", val);
 408 #endif
 409         break;
 410     }
 411 }
 412
 413 static void bochs_bios_init(void)
 414 {
 415     register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
 416     register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
 417     register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
 418     register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
 419     register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);
 420
 421     register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
 422     register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
 423     register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
 424     register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
 425 }
 426
 427 /* Generate an initial boot sector which sets state and jump to
 428    a specified vector */
 429 static void generate_bootsect(uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
 430 {
 431     uint8_t bootsect[512], *p;
 432     int i;
 433     int hda;
 434
 435     hda = drive_get_index(IF_IDE, 0, 0);
 436     if (hda == -1) {
 437         fprintf(stderr, "A disk image must be given for 'hda' when booting "
 438                 "a Linux kernel\n");
 439         exit(1);
 440     }
 441
 442     memset(bootsect, 0, sizeof(bootsect));
 443
 444     /* Copy the MSDOS partition table if possible */
 445     bdrv_read(drives_table[hda].bdrv, 0, bootsect, 1);
 446
 447     /* Make sure we have a partition signature */
 448     bootsect[510] = 0x55;
 449     bootsect[511] = 0xaa;
 450
 451     /* Actual code */
 452     p = bootsect;
 453     *p++ = 0xfa;                /* CLI */
 454     *p++ = 0xfc;                /* CLD */
 455
 456     for (i = 0; i < 6; i++) {
 457         if (i == 1)             /* Skip CS */
 458             continue;
 459
 460         *p++ = 0xb8;            /* MOV AX,imm16 */
 461         *p++ = segs[i];
 462         *p++ = segs[i] >> 8;
 463         *p++ = 0x8e;            /* MOV <seg>,AX */
 464         *p++ = 0xc0 + (i << 3);
 465     }
 466
 467     for (i = 0; i < 8; i++) {
 468         *p++ = 0x66;            /* 32-bit operand size */
 469         *p++ = 0xb8 + i;        /* MOV <reg>,imm32 */
 470         *p++ = gpr[i];
 471         *p++ = gpr[i] >> 8;
 472         *p++ = gpr[i] >> 16;
 473         *p++ = gpr[i] >> 24;
 474     }
 475
 476     *p++ = 0xea;                /* JMP FAR */
 477     *p++ = ip;                  /* IP */
 478     *p++ = ip >> 8;
 479     *p++ = segs[1];             /* CS */
 480     *p++ = segs[1] >> 8;
 481
 482     bdrv_set_boot_sector(drives_table[hda].bdrv, bootsect, sizeof(bootsect));
 483 }
 484
 485 static long get_file_size(FILE *f)
 486 {
 487     long where, size;
 488
 489     /* XXX: on Unix systems, using fstat() probably makes more sense */
 490
 491     where = ftell(f);
 492     fseek(f, 0, SEEK_END);
 493     size = ftell(f);
 494     fseek(f, where, SEEK_SET);
 495
 496     return size;
 497 }
 498
 499 static void load_linux(const char *kernel_filename,
 500                        const char *initrd_filename,
 501                        const char *kernel_cmdline)
 502 {
 503     uint16_t protocol;
 504     uint32_t gpr[8];
 505     uint16_t seg[6];
 506     uint16_t real_seg;
 507     int setup_size, kernel_size, initrd_size, cmdline_size;
 508     uint32_t initrd_max;
 509     uint8_t header[1024];
 510     target_phys_addr_t real_addr, prot_addr, cmdline_addr, initrd_addr;
 511     FILE *f, *fi;
 512
 513     /* Align to 16 bytes as a paranoia measure */
 514     cmdline_size = (strlen(kernel_cmdline)+16) & ~15;
 515
 516     /* load the kernel header */
 517     f = fopen(kernel_filename, "rb");
 518     if (!f || !(kernel_size = get_file_size(f)) ||
 519         fread(header, 1, 1024, f) != 1024) {
 520         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 521                 kernel_filename);
 522         exit(1);
 523     }
 524
 525     /* kernel protocol version */
 526 #if 0
 527     fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
 528 #endif
 529     if (ldl_p(header+0x202) == 0x53726448)
 530         protocol = lduw_p(header+0x206);
 531     else
 532         protocol = 0;
 533
 534     if (protocol < 0x200 || !(header[0x211] & 0x01)) {
 535         /* Low kernel */
 536         real_addr    = 0x90000;
 537         cmdline_addr = 0x9a000 - cmdline_size;
 538         prot_addr    = 0x10000;
 539     } else if (protocol < 0x202) {
 540         /* High but ancient kernel */
 541         real_addr    = 0x90000;
 542         cmdline_addr = 0x9a000 - cmdline_size;
 543         prot_addr    = 0x100000;
 544     } else {
 545         /* High and recent kernel */
 546         real_addr    = 0x10000;
 547         cmdline_addr = 0x20000;
 548         prot_addr    = 0x100000;
 549     }
 550
 551 #if 0
 552     fprintf(stderr,
 553             "qemu: real_addr     = 0x" TARGET_FMT_plx "\n"
 554             "qemu: cmdline_addr  = 0x" TARGET_FMT_plx "\n"
 555             "qemu: prot_addr     = 0x" TARGET_FMT_plx "\n",
 556             real_addr,
 557             cmdline_addr,
 558             prot_addr);
 559 #endif
 560
 561     /* highest address for loading the initrd */
 562     if (protocol >= 0x203)
 563         initrd_max = ldl_p(header+0x22c);
 564     else
 565         initrd_max = 0x37ffffff;
 566
 567     if (initrd_max >= ram_size-ACPI_DATA_SIZE)
 568         initrd_max = ram_size-ACPI_DATA_SIZE-1;
 569
 570     /* kernel command line */
 571     pstrcpy_targphys(cmdline_addr, 4096, kernel_cmdline);
 572
 573     if (protocol >= 0x202) {
 574         stl_p(header+0x228, cmdline_addr);
 575     } else {
 576         stw_p(header+0x20, 0xA33F);
 577         stw_p(header+0x22, cmdline_addr-real_addr);
 578     }
 579
 580     /* loader type */
 581     /* High nybble = B reserved for Qemu; low nybble is revision number.
 582        If this code is substantially changed, you may want to consider
 583        incrementing the revision. */
 584     if (protocol >= 0x200)
 585         header[0x210] = 0xB0;
 586
 587     /* heap */
 588     if (protocol >= 0x201) {
 589         header[0x211] |= 0x80;  /* CAN_USE_HEAP */
 590         stw_p(header+0x224, cmdline_addr-real_addr-0x200);
 591     }
 592
 593     /* load initrd */
 594     if (initrd_filename) {
 595         if (protocol < 0x200) {
 596             fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
 597             exit(1);
 598         }
 599
 600         fi = fopen(initrd_filename, "rb");
 601         if (!fi) {
 602             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 603                     initrd_filename);
 604             exit(1);
 605         }
 606
 607         initrd_size = get_file_size(fi);
 608         initrd_addr = (initrd_max-initrd_size) & ~4095;
 609
 610         fprintf(stderr, "qemu: loading initrd (%#x bytes) at 0x" TARGET_FMT_plx
 611                 "\n", initrd_size, initrd_addr);
 612
 613         if (!fread_targphys_ok(initrd_addr, initrd_size, fi)) {
 614             fprintf(stderr, "qemu: read error on initial ram disk '%s'\n",
 615                     initrd_filename);
 616             exit(1);
 617         }
 618         fclose(fi);
 619
 620         stl_p(header+0x218, initrd_addr);
 621         stl_p(header+0x21c, initrd_size);
 622     }
 623
 624     /* store the finalized header and load the rest of the kernel */
 625     cpu_physical_memory_write(real_addr, header, 1024);
 626
 627     setup_size = header[0x1f1];
 628     if (setup_size == 0)
 629         setup_size = 4;
 630
 631     setup_size = (setup_size+1)*512;
 632     kernel_size -= setup_size;  /* Size of protected-mode code */
 633
 634     if (!fread_targphys_ok(real_addr+1024, setup_size-1024, f) ||
 635         !fread_targphys_ok(prot_addr, kernel_size, f)) {
 636         fprintf(stderr, "qemu: read error on kernel '%s'\n",
 637                 kernel_filename);
 638         exit(1);
 639     }
 640     fclose(f);
 641
 642     /* generate bootsector to set up the initial register state */
 643     real_seg = real_addr >> 4;
 644     seg[0] = seg[2] = seg[3] = seg[4] = seg[4] = real_seg;
 645     seg[1] = real_seg+0x20;     /* CS */
 646     memset(gpr, 0, sizeof gpr);
 647     gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
 648
 649     generate_bootsect(gpr, seg, 0);
 650 }
 651
 652 static void main_cpu_reset(void *opaque)
 653 {
 654     CPUState *env = opaque;
 655     cpu_reset(env);
 656 }
 657
 658 static const int ide_iobase[2] = { 0x1f0, 0x170 };
 659 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
 660 static const int ide_irq[2] = { 14, 15 };
 661
 662 #define NE2000_NB_MAX 6
 663
 664 static int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
 665 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
 666
 667 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
 668 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
 669
 670 static int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
 671 static int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
 672
 673 #ifdef HAS_AUDIO
 674 static void audio_init (PCIBus *pci_bus, qemu_irq *pic)
 675 {
 676     struct soundhw *c;
 677     int audio_enabled = 0;
 678
 679     for (c = soundhw; !audio_enabled && c->name; ++c) {
 680         audio_enabled = c->enabled;
 681     }
 682
 683     if (audio_enabled) {
 684         AudioState *s;
 685
 686         s = AUD_init ();
 687         if (s) {
 688             for (c = soundhw; c->name; ++c) {
 689                 if (c->enabled) {
 690                     if (c->isa) {
 691                         c->init.init_isa (s, pic);
 692                     }
 693                     else {
 694                         if (pci_bus) {
 695                             c->init.init_pci (pci_bus, s);
 696                         }
 697                     }
 698                 }
 699             }
 700         }
 701     }
 702 }
 703 #endif
 704
 705 static void pc_init_ne2k_isa(NICInfo *nd, qemu_irq *pic)
 706 {
 707     static int nb_ne2k = 0;
 708
 709     if (nb_ne2k == NE2000_NB_MAX)
 710         return;
 711     isa_ne2000_init(ne2000_io[nb_ne2k], pic[ne2000_irq[nb_ne2k]], nd);
 712     nb_ne2k++;
 713 }
 714
 715 /* PC hardware initialisation */
 716 static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
 717                      const char *boot_device, DisplayState *ds,
 718                      const char *kernel_filename, const char *kernel_cmdline,
 719                      const char *initrd_filename,
 720                      int pci_enabled, const char *cpu_model)
 721 {
 722     char buf[1024];
 723     int ret, linux_boot, i;
 724     ram_addr_t ram_addr, vga_ram_addr, bios_offset, vga_bios_offset;
 725     ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
 726     int bios_size, isa_bios_size, vga_bios_size;
 727     PCIBus *pci_bus;
 728     int piix3_devfn = -1;
 729     CPUState *env;
 730     NICInfo *nd;
 731     qemu_irq *cpu_irq;
 732     qemu_irq *i8259;
 733     int index;
 734     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 735     BlockDriverState *fd[MAX_FD];
 736
 737     if (ram_size >= 0xe0000000 ) {
 738         above_4g_mem_size = ram_size - 0xe0000000;
 739         below_4g_mem_size = 0xe0000000;
 740     } else {
 741         below_4g_mem_size = ram_size;
 742     }
 743
 744     linux_boot = (kernel_filename != NULL);
 745
 746     /* init CPUs */
 747     if (cpu_model == NULL) {
 748 #ifdef TARGET_X86_64
 749         cpu_model = "qemu64";
 750 #else
 751         cpu_model = "qemu32";
 752 #endif
 753     }
 754
 755     for(i = 0; i < smp_cpus; i++) {
 756         env = cpu_init(cpu_model);
 757         if (!env) {
 758             fprintf(stderr, "Unable to find x86 CPU definition\n");
 759             exit(1);
 760         }
 761         if (i != 0)
 762             env->halted = 1;
 763         if (smp_cpus > 1) {
 764             /* XXX: enable it in all cases */
 765             env->cpuid_features |= CPUID_APIC;
 766         }
 767         qemu_register_reset(main_cpu_reset, env);
 768         if (pci_enabled) {
 769             apic_init(env);
 770         }
 771     }
 772
 773     vmport_init();
 774
 775     /* allocate RAM */
 776     ram_addr = qemu_ram_alloc(ram_size);
 777     cpu_register_physical_memory(0, below_4g_mem_size, ram_addr);
 778
 779     /* above 4giga memory allocation */
 780     if (above_4g_mem_size > 0) {
 781         cpu_register_physical_memory((target_phys_addr_t) 0x100000000ULL,
 782                                      above_4g_mem_size,
 783                                      ram_addr + below_4g_mem_size);
 784     }
 785
 786     /* allocate VGA RAM */
 787     vga_ram_addr = qemu_ram_alloc(vga_ram_size);
 788
 789     /* BIOS load */
 790     if (bios_name == NULL)
 791         bios_name = BIOS_FILENAME;
 792     snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
 793     bios_size = get_image_size(buf);
 794     if (bios_size <= 0 ||
 795         (bios_size % 65536) != 0) {
 796         goto bios_error;
 797     }
 798     bios_offset = qemu_ram_alloc(bios_size);
 799     ret = load_image(buf, phys_ram_base + bios_offset);
 800     if (ret != bios_size) {
 801     bios_error:
 802         fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", buf);
 803         exit(1);
 804     }
 805
 806     /* VGA BIOS load */
 807     if (cirrus_vga_enabled) {
 808         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_CIRRUS_FILENAME);
 809     } else {
 810         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
 811     }
 812     vga_bios_size = get_image_size(buf);
 813     if (vga_bios_size <= 0 || vga_bios_size > 65536)
 814         goto vga_bios_error;
 815     vga_bios_offset = qemu_ram_alloc(65536);
 816
 817     ret = load_image(buf, phys_ram_base + vga_bios_offset);
 818     if (ret != vga_bios_size) {
 819     vga_bios_error:
 820         fprintf(stderr, "qemu: could not load VGA BIOS '%s'\n", buf);
 821         exit(1);
 822     }
 823
 824     /* setup basic memory access */
 825     cpu_register_physical_memory(0xc0000, 0x10000,
 826                                  vga_bios_offset | IO_MEM_ROM);
 827
 828     /* map the last 128KB of the BIOS in ISA space */
 829     isa_bios_size = bios_size;
 830     if (isa_bios_size > (128 * 1024))
 831         isa_bios_size = 128 * 1024;
 832     cpu_register_physical_memory(0xd0000, (192 * 1024) - isa_bios_size,
 833                                  IO_MEM_UNASSIGNED);
 834     cpu_register_physical_memory(0x100000 - isa_bios_size,
 835                                  isa_bios_size,
 836                                  (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
 837
 838     {
 839         ram_addr_t option_rom_offset;
 840         int size, offset;
 841
 842         offset = 0;
 843         for (i = 0; i < nb_option_roms; i++) {
 844             size = get_image_size(option_rom[i]);
 845             if (size < 0) {
 846                 fprintf(stderr, "Could not load option rom '%s'\n",
 847                         option_rom[i]);
 848                 exit(1);
 849             }
 850             if (size > (0x10000 - offset))
 851                 goto option_rom_error;
 852             option_rom_offset = qemu_ram_alloc(size);
 853             ret = load_image(option_rom[i], phys_ram_base + option_rom_offset);
 854             if (ret != size) {
 855             option_rom_error:
 856                 fprintf(stderr, "Too many option ROMS\n");
 857                 exit(1);
 858             }
 859             size = (size + 4095) & ~4095;
 860             cpu_register_physical_memory(0xd0000 + offset,
 861                                          size, option_rom_offset | IO_MEM_ROM);
 862             offset += size;
 863         }
 864     }
 865
 866     /* map all the bios at the top of memory */
 867     cpu_register_physical_memory((uint32_t)(-bios_size),
 868                                  bios_size, bios_offset | IO_MEM_ROM);
 869
 870     bochs_bios_init();
 871
 872     if (linux_boot)
 873         load_linux(kernel_filename, initrd_filename, kernel_cmdline);
 874
 875     cpu_irq = qemu_allocate_irqs(pic_irq_request, NULL, 1);
 876     i8259 = i8259_init(cpu_irq[0]);
 877     ferr_irq = i8259[13];
 878
 879     if (pci_enabled) {
 880         pci_bus = i440fx_init(&i440fx_state, i8259);
 881         piix3_devfn = piix3_init(pci_bus, -1);
 882     } else {
 883         pci_bus = NULL;
 884     }
 885
 886     /* init basic PC hardware */
 887     register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
 888
 889     register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
 890
 891     if (cirrus_vga_enabled) {
 892         if (pci_enabled) {
 893             pci_cirrus_vga_init(pci_bus,
 894                                 ds, phys_ram_base + vga_ram_addr,
 895                                 vga_ram_addr, vga_ram_size);
 896         } else {
 897             isa_cirrus_vga_init(ds, phys_ram_base + vga_ram_addr,
 898                                 vga_ram_addr, vga_ram_size);
 899         }
 900     } else if (vmsvga_enabled) {
 901         if (pci_enabled)
 902             pci_vmsvga_init(pci_bus, ds, phys_ram_base + vga_ram_addr,
 903                             vga_ram_addr, vga_ram_size);
 904         else
 905             fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
 906     } else {
 907         if (pci_enabled) {
 908             pci_vga_init(pci_bus, ds, phys_ram_base + vga_ram_addr,
 909                          vga_ram_addr, vga_ram_size, 0, 0);
 910         } else {
 911             isa_vga_init(ds, phys_ram_base + vga_ram_addr,
 912                          vga_ram_addr, vga_ram_size);
 913         }
 914     }
 915
 916     rtc_state = rtc_init(0x70, i8259[8]);
 917
 918     qemu_register_boot_set(pc_boot_set, rtc_state);
 919
 920     register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
 921     register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
 922
 923     if (pci_enabled) {
 924         ioapic = ioapic_init();
 925     }
 926     pit = pit_init(0x40, i8259[0]);
 927     pcspk_init(pit);
 928     if (pci_enabled) {
 929         pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
 930     }
 931
 932     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
 933         if (serial_hds[i]) {
 934             serial_init(serial_io[i], i8259[serial_irq[i]], 115200,
 935                         serial_hds[i]);
 936         }
 937     }
 938
 939     for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
 940         if (parallel_hds[i]) {
 941             parallel_init(parallel_io[i], i8259[parallel_irq[i]],
 942                           parallel_hds[i]);
 943         }
 944     }
 945
 946     for(i = 0; i < nb_nics; i++) {
 947         nd = &nd_table[i];
 948         if (!nd->model) {
 949             if (pci_enabled) {
 950                 nd->model = "ne2k_pci";
 951             } else {
 952                 nd->model = "ne2k_isa";
 953             }
 954         }
 955         if (strcmp(nd->model, "ne2k_isa") == 0) {
 956             pc_init_ne2k_isa(nd, i8259);
 957         } else if (pci_enabled) {
 958             if (strcmp(nd->model, "?") == 0)
 959                 fprintf(stderr, "qemu: Supported ISA NICs: ne2k_isa\n");
 960             pci_nic_init(pci_bus, nd, -1);
 961         } else if (strcmp(nd->model, "?") == 0) {
 962             fprintf(stderr, "qemu: Supported ISA NICs: ne2k_isa\n");
 963             exit(1);
 964         } else {
 965             fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);
 966             exit(1);
 967         }
 968     }
 969
 970     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
 971         fprintf(stderr, "qemu: too many IDE bus\n");
 972         exit(1);
 973     }
 974
 975     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
 976         index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
 977         if (index != -1)
 978             hd[i] = drives_table[index].bdrv;
 979         else
 980             hd[i] = NULL;
 981     }
 982
 983     if (pci_enabled) {
 984         pci_piix3_ide_init(pci_bus, hd, piix3_devfn + 1, i8259);
 985     } else {
 986         for(i = 0; i < MAX_IDE_BUS; i++) {
 987             isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
 988                          hd[MAX_IDE_DEVS * i], hd[MAX_IDE_DEVS * i + 1]);
 989         }
 990     }
 991
 992     i8042_init(i8259[1], i8259[12], 0x60);
 993     DMA_init(0);
 994 #ifdef HAS_AUDIO
 995     audio_init(pci_enabled ? pci_bus : NULL, i8259);
 996 #endif
 997
 998     for(i = 0; i < MAX_FD; i++) {
 999         index = drive_get_index(IF_FLOPPY, 0, i);
1000         if (index != -1)
1001             fd[i] = drives_table[index].bdrv;
1002         else
1003             fd[i] = NULL;
1004     }
1005     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd);
1006
1007     cmos_init(below_4g_mem_size, above_4g_mem_size, boot_device, hd);
1008
1009     if (pci_enabled && usb_enabled) {
1010         usb_uhci_piix3_init(pci_bus, piix3_devfn + 2);
1011     }
1012
1013     if (pci_enabled && acpi_enabled) {
1014         uint8_t *eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
1015         i2c_bus *smbus;
1016
1017         /* TODO: Populate SPD eeprom data.  */
1018         smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100, i8259[9]);
1019         for (i = 0; i < 8; i++) {
1020             smbus_eeprom_device_init(smbus, 0x50 + i, eeprom_buf + (i * 256));
1021         }
1022     }
1023
1024     if (i440fx_state) {
1025         i440fx_init_memory_mappings(i440fx_state);
1026     }
1027
1028     if (pci_enabled) {
1029         int max_bus;
1030         int bus, unit;
1031         void *scsi;
1032
1033         max_bus = drive_get_max_bus(IF_SCSI);
1034
1035         for (bus = 0; bus <= max_bus; bus++) {
1036             scsi = lsi_scsi_init(pci_bus, -1);
1037             for (unit = 0; unit < LSI_MAX_DEVS; unit++) {
1038                 index = drive_get_index(IF_SCSI, bus, unit);
1039                 if (index == -1)
1040                     continue;
1041                 lsi_scsi_attach(scsi, drives_table[index].bdrv, unit);
1042             }
1043         }
1044     }
1045 }
1046
1047 static void pc_init_pci(ram_addr_t ram_size, int vga_ram_size,
1048                         const char *boot_device, DisplayState *ds,
1049                         const char *kernel_filename,
1050                         const char *kernel_cmdline,
1051                         const char *initrd_filename,
1052                         const char *cpu_model)
1053 {
1054     pc_init1(ram_size, vga_ram_size, boot_device, ds,
1055              kernel_filename, kernel_cmdline,
1056              initrd_filename, 1, cpu_model);
1057 }
1058
1059 static void pc_init_isa(ram_addr_t ram_size, int vga_ram_size,
1060                         const char *boot_device, DisplayState *ds,
1061                         const char *kernel_filename,
1062                         const char *kernel_cmdline,
1063                         const char *initrd_filename,
1064                         const char *cpu_model)
1065 {
1066     pc_init1(ram_size, vga_ram_size, boot_device, ds,
1067              kernel_filename, kernel_cmdline,
1068              initrd_filename, 0, cpu_model);
1069 }
1070
1071 QEMUMachine pc_machine = {
1072     "pc",
1073     "Standard PC",
1074     pc_init_pci,
1075     VGA_RAM_SIZE + PC_MAX_BIOS_SIZE,
1076 };
1077
1078 QEMUMachine isapc_machine = {
1079     "isapc",
1080     "ISA-only PC",
1081     pc_init_isa,
1082     VGA_RAM_SIZE + PC_MAX_BIOS_SIZE,
1083 };