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 #include "fw_cfg.h"
  36 #include "virtio-blk.h"
  37 #include "virtio-balloon.h"
  38 #include "virtio-console.h"
  39 #include "hpet_emul.h"
  40
  41 /* output Bochs bios info messages */
  42 //#define DEBUG_BIOS
  43
  44 #define BIOS_FILENAME "bios.bin"
  45 #define VGABIOS_FILENAME "vgabios.bin"
  46 #define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"
  47
  48 #define PC_MAX_BIOS_SIZE (4 * 1024 * 1024)
  49
  50 /* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables.  */
  51 #define ACPI_DATA_SIZE       0x10000
  52 #define BIOS_CFG_IOPORT 0x510
  53
  54 #define MAX_IDE_BUS 2
  55
  56 static fdctrl_t *floppy_controller;
  57 static RTCState *rtc_state;
  58 static PITState *pit;
  59 static IOAPICState *ioapic;
  60 static PCIDevice *i440fx_state;
  61
  62 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
  63 {
  64 }
  65
  66 /* MSDOS compatibility mode FPU exception support */
  67 static qemu_irq ferr_irq;
  68 /* XXX: add IGNNE support */
  69 void cpu_set_ferr(CPUX86State *s)
  70 {
  71     qemu_irq_raise(ferr_irq);
  72 }
  73
  74 static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
  75 {
  76     qemu_irq_lower(ferr_irq);
  77 }
  78
  79 /* TSC handling */
  80 uint64_t cpu_get_tsc(CPUX86State *env)
  81 {
  82     /* Note: when using kqemu, it is more logical to return the host TSC
  83        because kqemu does not trap the RDTSC instruction for
  84        performance reasons */
  85 #ifdef USE_KQEMU
  86     if (env->kqemu_enabled) {
  87         return cpu_get_real_ticks();
  88     } else
  89 #endif
  90     {
  91         return cpu_get_ticks();
  92     }
  93 }
  94
  95 /* SMM support */
  96 void cpu_smm_update(CPUState *env)
  97 {
  98     if (i440fx_state && env == first_cpu)
  99         i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
 100 }
 101
 102
 103 /* IRQ handling */
 104 int cpu_get_pic_interrupt(CPUState *env)
 105 {
 106     int intno;
 107
 108     intno = apic_get_interrupt(env);
 109     if (intno >= 0) {
 110         /* set irq request if a PIC irq is still pending */
 111         /* XXX: improve that */
 112         pic_update_irq(isa_pic);
 113         return intno;
 114     }
 115     /* read the irq from the PIC */
 116     if (!apic_accept_pic_intr(env))
 117         return -1;
 118
 119     intno = pic_read_irq(isa_pic);
 120     return intno;
 121 }
 122
 123 static void pic_irq_request(void *opaque, int irq, int level)
 124 {
 125     CPUState *env = first_cpu;
 126
 127     if (env->apic_state) {
 128         while (env) {
 129             if (apic_accept_pic_intr(env))
 130                 apic_deliver_pic_intr(env, level);
 131             env = env->next_cpu;
 132         }
 133     } else {
 134         if (level)
 135             cpu_interrupt(env, CPU_INTERRUPT_HARD);
 136         else
 137             cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
 138     }
 139 }
 140
 141 /* PC cmos mappings */
 142
 143 #define REG_EQUIPMENT_BYTE          0x14
 144
 145 static int cmos_get_fd_drive_type(int fd0)
 146 {
 147     int val;
 148
 149     switch (fd0) {
 150     case 0:
 151         /* 1.44 Mb 3"5 drive */
 152         val = 4;
 153         break;
 154     case 1:
 155         /* 2.88 Mb 3"5 drive */
 156         val = 5;
 157         break;
 158     case 2:
 159         /* 1.2 Mb 5"5 drive */
 160         val = 2;
 161         break;
 162     default:
 163         val = 0;
 164         break;
 165     }
 166     return val;
 167 }
 168
 169 static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd)
 170 {
 171     RTCState *s = rtc_state;
 172     int cylinders, heads, sectors;
 173     bdrv_get_geometry_hint(hd, &cylinders, &heads, &sectors);
 174     rtc_set_memory(s, type_ofs, 47);
 175     rtc_set_memory(s, info_ofs, cylinders);
 176     rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
 177     rtc_set_memory(s, info_ofs + 2, heads);
 178     rtc_set_memory(s, info_ofs + 3, 0xff);
 179     rtc_set_memory(s, info_ofs + 4, 0xff);
 180     rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
 181     rtc_set_memory(s, info_ofs + 6, cylinders);
 182     rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
 183     rtc_set_memory(s, info_ofs + 8, sectors);
 184 }
 185
 186 /* convert boot_device letter to something recognizable by the bios */
 187 static int boot_device2nibble(char boot_device)
 188 {
 189     switch(boot_device) {
 190     case 'a':
 191     case 'b':
 192         return 0x01; /* floppy boot */
 193     case 'c':
 194         return 0x02; /* hard drive boot */
 195     case 'd':
 196         return 0x03; /* CD-ROM boot */
 197     case 'n':
 198         return 0x04; /* Network boot */
 199     }
 200     return 0;
 201 }
 202
 203 /* copy/pasted from cmos_init, should be made a general function
 204  and used there as well */
 205 static int pc_boot_set(void *opaque, const char *boot_device)
 206 {
 207 #define PC_MAX_BOOT_DEVICES 3
 208     RTCState *s = (RTCState *)opaque;
 209     int nbds, bds[3] = { 0, };
 210     int i;
 211
 212     nbds = strlen(boot_device);
 213     if (nbds > PC_MAX_BOOT_DEVICES) {
 214         term_printf("Too many boot devices for PC\n");
 215         return(1);
 216     }
 217     for (i = 0; i < nbds; i++) {
 218         bds[i] = boot_device2nibble(boot_device[i]);
 219         if (bds[i] == 0) {
 220             term_printf("Invalid boot device for PC: '%c'\n",
 221                     boot_device[i]);
 222             return(1);
 223         }
 224     }
 225     rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
 226     rtc_set_memory(s, 0x38, (bds[2] << 4));
 227     return(0);
 228 }
 229
 230 /* hd_table must contain 4 block drivers */
 231 static void cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
 232                       const char *boot_device, BlockDriverState **hd_table)
 233 {
 234     RTCState *s = rtc_state;
 235     int nbds, bds[3] = { 0, };
 236     int val;
 237     int fd0, fd1, nb;
 238     int i;
 239
 240     /* various important CMOS locations needed by PC/Bochs bios */
 241
 242     /* memory size */
 243     val = 640; /* base memory in K */
 244     rtc_set_memory(s, 0x15, val);
 245     rtc_set_memory(s, 0x16, val >> 8);
 246
 247     val = (ram_size / 1024) - 1024;
 248     if (val > 65535)
 249         val = 65535;
 250     rtc_set_memory(s, 0x17, val);
 251     rtc_set_memory(s, 0x18, val >> 8);
 252     rtc_set_memory(s, 0x30, val);
 253     rtc_set_memory(s, 0x31, val >> 8);
 254
 255     if (above_4g_mem_size) {
 256         rtc_set_memory(s, 0x5b, (unsigned int)above_4g_mem_size >> 16);
 257         rtc_set_memory(s, 0x5c, (unsigned int)above_4g_mem_size >> 24);
 258         rtc_set_memory(s, 0x5d, (uint64_t)above_4g_mem_size >> 32);
 259     }
 260
 261     if (ram_size > (16 * 1024 * 1024))
 262         val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
 263     else
 264         val = 0;
 265     if (val > 65535)
 266         val = 65535;
 267     rtc_set_memory(s, 0x34, val);
 268     rtc_set_memory(s, 0x35, val >> 8);
 269
 270     /* set the number of CPU */
 271     rtc_set_memory(s, 0x5f, smp_cpus - 1);
 272
 273     /* set boot devices, and disable floppy signature check if requested */
 274 #define PC_MAX_BOOT_DEVICES 3
 275     nbds = strlen(boot_device);
 276     if (nbds > PC_MAX_BOOT_DEVICES) {
 277         fprintf(stderr, "Too many boot devices for PC\n");
 278         exit(1);
 279     }
 280     for (i = 0; i < nbds; i++) {
 281         bds[i] = boot_device2nibble(boot_device[i]);
 282         if (bds[i] == 0) {
 283             fprintf(stderr, "Invalid boot device for PC: '%c'\n",
 284                     boot_device[i]);
 285             exit(1);
 286         }
 287     }
 288     rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
 289     rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ?  0x0 : 0x1));
 290
 291     /* floppy type */
 292
 293     fd0 = fdctrl_get_drive_type(floppy_controller, 0);
 294     fd1 = fdctrl_get_drive_type(floppy_controller, 1);
 295
 296     val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1);
 297     rtc_set_memory(s, 0x10, val);
 298
 299     val = 0;
 300     nb = 0;
 301     if (fd0 < 3)
 302         nb++;
 303     if (fd1 < 3)
 304         nb++;
 305     switch (nb) {
 306     case 0:
 307         break;
 308     case 1:
 309         val |= 0x01; /* 1 drive, ready for boot */
 310         break;
 311     case 2:
 312         val |= 0x41; /* 2 drives, ready for boot */
 313         break;
 314     }
 315     val |= 0x02; /* FPU is there */
 316     val |= 0x04; /* PS/2 mouse installed */
 317     rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
 318
 319     /* hard drives */
 320
 321     rtc_set_memory(s, 0x12, (hd_table[0] ? 0xf0 : 0) | (hd_table[1] ? 0x0f : 0));
 322     if (hd_table[0])
 323         cmos_init_hd(0x19, 0x1b, hd_table[0]);
 324     if (hd_table[1])
 325         cmos_init_hd(0x1a, 0x24, hd_table[1]);
 326
 327     val = 0;
 328     for (i = 0; i < 4; i++) {
 329         if (hd_table[i]) {
 330             int cylinders, heads, sectors, translation;
 331             /* NOTE: bdrv_get_geometry_hint() returns the physical
 332                 geometry.  It is always such that: 1 <= sects <= 63, 1
 333                 <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
 334                 geometry can be different if a translation is done. */
 335             translation = bdrv_get_translation_hint(hd_table[i]);
 336             if (translation == BIOS_ATA_TRANSLATION_AUTO) {
 337                 bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, &sectors);
 338                 if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
 339                     /* No translation. */
 340                     translation = 0;
 341                 } else {
 342                     /* LBA translation. */
 343                     translation = 1;
 344                 }
 345             } else {
 346                 translation--;
 347             }
 348             val |= translation << (i * 2);
 349         }
 350     }
 351     rtc_set_memory(s, 0x39, val);
 352 }
 353
 354 void ioport_set_a20(int enable)
 355 {
 356     /* XXX: send to all CPUs ? */
 357     cpu_x86_set_a20(first_cpu, enable);
 358 }
 359
 360 int ioport_get_a20(void)
 361 {
 362     return ((first_cpu->a20_mask >> 20) & 1);
 363 }
 364
 365 static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
 366 {
 367     ioport_set_a20((val >> 1) & 1);
 368     /* XXX: bit 0 is fast reset */
 369 }
 370
 371 static uint32_t ioport92_read(void *opaque, uint32_t addr)
 372 {
 373     return ioport_get_a20() << 1;
 374 }
 375
 376 /***********************************************************/
 377 /* Bochs BIOS debug ports */
 378
 379 static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
 380 {
 381     static const char shutdown_str[8] = "Shutdown";
 382     static int shutdown_index = 0;
 383
 384     switch(addr) {
 385         /* Bochs BIOS messages */
 386     case 0x400:
 387     case 0x401:
 388         fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
 389         exit(1);
 390     case 0x402:
 391     case 0x403:
 392 #ifdef DEBUG_BIOS
 393         fprintf(stderr, "%c", val);
 394 #endif
 395         break;
 396     case 0x8900:
 397         /* same as Bochs power off */
 398         if (val == shutdown_str[shutdown_index]) {
 399             shutdown_index++;
 400             if (shutdown_index == 8) {
 401                 shutdown_index = 0;
 402                 qemu_system_shutdown_request();
 403             }
 404         } else {
 405             shutdown_index = 0;
 406         }
 407         break;
 408
 409         /* LGPL'ed VGA BIOS messages */
 410     case 0x501:
 411     case 0x502:
 412         fprintf(stderr, "VGA BIOS panic, line %d\n", val);
 413         exit(1);
 414     case 0x500:
 415     case 0x503:
 416 #ifdef DEBUG_BIOS
 417         fprintf(stderr, "%c", val);
 418 #endif
 419         break;
 420     }
 421 }
 422
 423 static void bochs_bios_init(void)
 424 {
 425     void *fw_cfg;
 426
 427     register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
 428     register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
 429     register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
 430     register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
 431     register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);
 432
 433     register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
 434     register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
 435     register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
 436     register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
 437
 438     fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
 439     fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
 440     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
 441 }
 442
 443 /* Generate an initial boot sector which sets state and jump to
 444    a specified vector */
 445 static void generate_bootsect(uint8_t *option_rom,
 446                               uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
 447 {
 448     uint8_t rom[512], *p, *reloc;
 449     uint8_t sum;
 450     int i;
 451
 452     memset(rom, 0, sizeof(rom));
 453
 454     p = rom;
 455     /* Make sure we have an option rom signature */
 456     *p++ = 0x55;
 457     *p++ = 0xaa;
 458
 459     /* ROM size in sectors*/
 460     *p++ = 1;
 461
 462     /* Hook int19 */
 463
 464     *p++ = 0x50;                /* push ax */
 465     *p++ = 0x1e;                /* push ds */
 466     *p++ = 0x31; *p++ = 0xc0;   /* xor ax, ax */
 467     *p++ = 0x8e; *p++ = 0xd8;   /* mov ax, ds */
 468
 469     *p++ = 0xc7; *p++ = 0x06;   /* movvw _start,0x64 */
 470     *p++ = 0x64; *p++ = 0x00;
 471     reloc = p;
 472     *p++ = 0x00; *p++ = 0x00;
 473
 474     *p++ = 0x8c; *p++ = 0x0e;   /* mov cs,0x66 */
 475     *p++ = 0x66; *p++ = 0x00;
 476
 477     *p++ = 0x1f;                /* pop ds */
 478     *p++ = 0x58;                /* pop ax */
 479     *p++ = 0xcb;                /* lret */
 480
 481     /* Actual code */
 482     *reloc = (p - rom);
 483
 484     *p++ = 0xfa;                /* CLI */
 485     *p++ = 0xfc;                /* CLD */
 486
 487     for (i = 0; i < 6; i++) {
 488         if (i == 1)             /* Skip CS */
 489             continue;
 490
 491         *p++ = 0xb8;            /* MOV AX,imm16 */
 492         *p++ = segs[i];
 493         *p++ = segs[i] >> 8;
 494         *p++ = 0x8e;            /* MOV <seg>,AX */
 495         *p++ = 0xc0 + (i << 3);
 496     }
 497
 498     for (i = 0; i < 8; i++) {
 499         *p++ = 0x66;            /* 32-bit operand size */
 500         *p++ = 0xb8 + i;        /* MOV <reg>,imm32 */
 501         *p++ = gpr[i];
 502         *p++ = gpr[i] >> 8;
 503         *p++ = gpr[i] >> 16;
 504         *p++ = gpr[i] >> 24;
 505     }
 506
 507     *p++ = 0xea;                /* JMP FAR */
 508     *p++ = ip;                  /* IP */
 509     *p++ = ip >> 8;
 510     *p++ = segs[1];             /* CS */
 511     *p++ = segs[1] >> 8;
 512
 513     /* sign rom */
 514     sum = 0;
 515     for (i = 0; i < (sizeof(rom) - 1); i++)
 516         sum += rom[i];
 517     rom[sizeof(rom) - 1] = -sum;
 518
 519     memcpy(option_rom, rom, sizeof(rom));
 520 }
 521
 522 static long get_file_size(FILE *f)
 523 {
 524     long where, size;
 525
 526     /* XXX: on Unix systems, using fstat() probably makes more sense */
 527
 528     where = ftell(f);
 529     fseek(f, 0, SEEK_END);
 530     size = ftell(f);
 531     fseek(f, where, SEEK_SET);
 532
 533     return size;
 534 }
 535
 536 static void load_linux(uint8_t *option_rom,
 537                        const char *kernel_filename,
 538                        const char *initrd_filename,
 539                        const char *kernel_cmdline)
 540 {
 541     uint16_t protocol;
 542     uint32_t gpr[8];
 543     uint16_t seg[6];
 544     uint16_t real_seg;
 545     int setup_size, kernel_size, initrd_size, cmdline_size;
 546     uint32_t initrd_max;
 547     uint8_t header[1024];
 548     target_phys_addr_t real_addr, prot_addr, cmdline_addr, initrd_addr;
 549     FILE *f, *fi;
 550
 551     /* Align to 16 bytes as a paranoia measure */
 552     cmdline_size = (strlen(kernel_cmdline)+16) & ~15;
 553
 554     /* load the kernel header */
 555     f = fopen(kernel_filename, "rb");
 556     if (!f || !(kernel_size = get_file_size(f)) ||
 557         fread(header, 1, 1024, f) != 1024) {
 558         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 559                 kernel_filename);
 560         exit(1);
 561     }
 562
 563     /* kernel protocol version */
 564 #if 0
 565     fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
 566 #endif
 567     if (ldl_p(header+0x202) == 0x53726448)
 568         protocol = lduw_p(header+0x206);
 569     else
 570         protocol = 0;
 571
 572     if (protocol < 0x200 || !(header[0x211] & 0x01)) {
 573         /* Low kernel */
 574         real_addr    = 0x90000;
 575         cmdline_addr = 0x9a000 - cmdline_size;
 576         prot_addr    = 0x10000;
 577     } else if (protocol < 0x202) {
 578         /* High but ancient kernel */
 579         real_addr    = 0x90000;
 580         cmdline_addr = 0x9a000 - cmdline_size;
 581         prot_addr    = 0x100000;
 582     } else {
 583         /* High and recent kernel */
 584         real_addr    = 0x10000;
 585         cmdline_addr = 0x20000;
 586         prot_addr    = 0x100000;
 587     }
 588
 589 #if 0
 590     fprintf(stderr,
 591             "qemu: real_addr     = 0x" TARGET_FMT_plx "\n"
 592             "qemu: cmdline_addr  = 0x" TARGET_FMT_plx "\n"
 593             "qemu: prot_addr     = 0x" TARGET_FMT_plx "\n",
 594             real_addr,
 595             cmdline_addr,
 596             prot_addr);
 597 #endif
 598
 599     /* highest address for loading the initrd */
 600     if (protocol >= 0x203)
 601         initrd_max = ldl_p(header+0x22c);
 602     else
 603         initrd_max = 0x37ffffff;
 604
 605     if (initrd_max >= ram_size-ACPI_DATA_SIZE)
 606         initrd_max = ram_size-ACPI_DATA_SIZE-1;
 607
 608     /* kernel command line */
 609     pstrcpy_targphys(cmdline_addr, 4096, kernel_cmdline);
 610
 611     if (protocol >= 0x202) {
 612         stl_p(header+0x228, cmdline_addr);
 613     } else {
 614         stw_p(header+0x20, 0xA33F);
 615         stw_p(header+0x22, cmdline_addr-real_addr);
 616     }
 617
 618     /* loader type */
 619     /* High nybble = B reserved for Qemu; low nybble is revision number.
 620        If this code is substantially changed, you may want to consider
 621        incrementing the revision. */
 622     if (protocol >= 0x200)
 623         header[0x210] = 0xB0;
 624
 625     /* heap */
 626     if (protocol >= 0x201) {
 627         header[0x211] |= 0x80;  /* CAN_USE_HEAP */
 628         stw_p(header+0x224, cmdline_addr-real_addr-0x200);
 629     }
 630
 631     /* load initrd */
 632     if (initrd_filename) {
 633         if (protocol < 0x200) {
 634             fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
 635             exit(1);
 636         }
 637
 638         fi = fopen(initrd_filename, "rb");
 639         if (!fi) {
 640             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 641                     initrd_filename);
 642             exit(1);
 643         }
 644
 645         initrd_size = get_file_size(fi);
 646         initrd_addr = (initrd_max-initrd_size) & ~4095;
 647
 648         fprintf(stderr, "qemu: loading initrd (%#x bytes) at 0x" TARGET_FMT_plx
 649                 "\n", initrd_size, initrd_addr);
 650
 651         if (!fread_targphys_ok(initrd_addr, initrd_size, fi)) {
 652             fprintf(stderr, "qemu: read error on initial ram disk '%s'\n",
 653                     initrd_filename);
 654             exit(1);
 655         }
 656         fclose(fi);
 657
 658         stl_p(header+0x218, initrd_addr);
 659         stl_p(header+0x21c, initrd_size);
 660     }
 661
 662     /* store the finalized header and load the rest of the kernel */
 663     cpu_physical_memory_write(real_addr, header, 1024);
 664
 665     setup_size = header[0x1f1];
 666     if (setup_size == 0)
 667         setup_size = 4;
 668
 669     setup_size = (setup_size+1)*512;
 670     kernel_size -= setup_size;  /* Size of protected-mode code */
 671
 672     if (!fread_targphys_ok(real_addr+1024, setup_size-1024, f) ||
 673         !fread_targphys_ok(prot_addr, kernel_size, f)) {
 674         fprintf(stderr, "qemu: read error on kernel '%s'\n",
 675                 kernel_filename);
 676         exit(1);
 677     }
 678     fclose(f);
 679
 680     /* generate bootsector to set up the initial register state */
 681     real_seg = real_addr >> 4;
 682     seg[0] = seg[2] = seg[3] = seg[4] = seg[4] = real_seg;
 683     seg[1] = real_seg+0x20;     /* CS */
 684     memset(gpr, 0, sizeof gpr);
 685     gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
 686
 687     generate_bootsect(option_rom, gpr, seg, 0);
 688 }
 689
 690 static void main_cpu_reset(void *opaque)
 691 {
 692     CPUState *env = opaque;
 693     cpu_reset(env);
 694 }
 695
 696 static const int ide_iobase[2] = { 0x1f0, 0x170 };
 697 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
 698 static const int ide_irq[2] = { 14, 15 };
 699
 700 #define NE2000_NB_MAX 6
 701
 702 static int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
 703 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
 704
 705 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
 706 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
 707
 708 static int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
 709 static int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
 710
 711 #ifdef HAS_AUDIO
 712 static void audio_init (PCIBus *pci_bus, qemu_irq *pic)
 713 {
 714     struct soundhw *c;
 715     int audio_enabled = 0;
 716
 717     for (c = soundhw; !audio_enabled && c->name; ++c) {
 718         audio_enabled = c->enabled;
 719     }
 720
 721     if (audio_enabled) {
 722         AudioState *s;
 723
 724         s = AUD_init ();
 725         if (s) {
 726             for (c = soundhw; c->name; ++c) {
 727                 if (c->enabled) {
 728                     if (c->isa) {
 729                         c->init.init_isa (s, pic);
 730                     }
 731                     else {
 732                         if (pci_bus) {
 733                             c->init.init_pci (pci_bus, s);
 734                         }
 735                     }
 736                 }
 737             }
 738         }
 739     }
 740 }
 741 #endif
 742
 743 static void pc_init_ne2k_isa(NICInfo *nd, qemu_irq *pic)
 744 {
 745     static int nb_ne2k = 0;
 746
 747     if (nb_ne2k == NE2000_NB_MAX)
 748         return;
 749     isa_ne2000_init(ne2000_io[nb_ne2k], pic[ne2000_irq[nb_ne2k]], nd);
 750     nb_ne2k++;
 751 }
 752
 753 /* PC hardware initialisation */
 754 static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
 755                      const char *boot_device,
 756                      const char *kernel_filename, const char *kernel_cmdline,
 757                      const char *initrd_filename,
 758                      int pci_enabled, const char *cpu_model)
 759 {
 760     char buf[1024];
 761     int ret, linux_boot, i;
 762     ram_addr_t ram_addr, vga_ram_addr, bios_offset, vga_bios_offset;
 763     ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
 764     int bios_size, isa_bios_size, vga_bios_size;
 765     PCIBus *pci_bus;
 766     int piix3_devfn = -1;
 767     CPUState *env;
 768     qemu_irq *cpu_irq;
 769     qemu_irq *i8259;
 770     int index;
 771     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 772     BlockDriverState *fd[MAX_FD];
 773
 774     if (ram_size >= 0xe0000000 ) {
 775         above_4g_mem_size = ram_size - 0xe0000000;
 776         below_4g_mem_size = 0xe0000000;
 777     } else {
 778         below_4g_mem_size = ram_size;
 779     }
 780
 781     linux_boot = (kernel_filename != NULL);
 782
 783     /* init CPUs */
 784     if (cpu_model == NULL) {
 785 #ifdef TARGET_X86_64
 786         cpu_model = "qemu64";
 787 #else
 788         cpu_model = "qemu32";
 789 #endif
 790     }
 791
 792     for(i = 0; i < smp_cpus; i++) {
 793         env = cpu_init(cpu_model);
 794         if (!env) {
 795             fprintf(stderr, "Unable to find x86 CPU definition\n");
 796             exit(1);
 797         }
 798         if (i != 0)
 799             env->halted = 1;
 800         if (smp_cpus > 1) {
 801             /* XXX: enable it in all cases */
 802             env->cpuid_features |= CPUID_APIC;
 803         }
 804         qemu_register_reset(main_cpu_reset, env);
 805         if (pci_enabled) {
 806             apic_init(env);
 807         }
 808     }
 809
 810     vmport_init();
 811
 812     /* allocate RAM */
 813     ram_addr = qemu_ram_alloc(0xa0000);
 814     cpu_register_physical_memory(0, 0xa0000, ram_addr);
 815
 816     /* Allocate, even though we won't register, so we don't break the
 817      * phys_ram_base + PA assumption. This range includes vga (0xa0000 - 0xc0000),
 818      * and some bios areas, which will be registered later
 819      */
 820     ram_addr = qemu_ram_alloc(0x100000 - 0xa0000);
 821     ram_addr = qemu_ram_alloc(below_4g_mem_size - 0x100000);
 822     cpu_register_physical_memory(0x100000,
 823                  below_4g_mem_size - 0x100000,
 824                  ram_addr);
 825
 826     /* above 4giga memory allocation */
 827     if (above_4g_mem_size > 0) {
 828         ram_addr = qemu_ram_alloc(above_4g_mem_size);
 829         cpu_register_physical_memory(0x100000000ULL,
 830                                      above_4g_mem_size,
 831                                      ram_addr);
 832     }
 833
 834
 835     /* allocate VGA RAM */
 836     vga_ram_addr = qemu_ram_alloc(vga_ram_size);
 837
 838     /* BIOS load */
 839     if (bios_name == NULL)
 840         bios_name = BIOS_FILENAME;
 841     snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
 842     bios_size = get_image_size(buf);
 843     if (bios_size <= 0 ||
 844         (bios_size % 65536) != 0) {
 845         goto bios_error;
 846     }
 847     bios_offset = qemu_ram_alloc(bios_size);
 848     ret = load_image(buf, phys_ram_base + bios_offset);
 849     if (ret != bios_size) {
 850     bios_error:
 851         fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", buf);
 852         exit(1);
 853     }
 854
 855     if (cirrus_vga_enabled || std_vga_enabled || vmsvga_enabled) {
 856         /* VGA BIOS load */
 857         if (cirrus_vga_enabled) {
 858             snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_CIRRUS_FILENAME);
 859         } else {
 860             snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
 861         }
 862         vga_bios_size = get_image_size(buf);
 863         if (vga_bios_size <= 0 || vga_bios_size > 65536)
 864             goto vga_bios_error;
 865         vga_bios_offset = qemu_ram_alloc(65536);
 866
 867         ret = load_image(buf, phys_ram_base + vga_bios_offset);
 868         if (ret != vga_bios_size) {
 869 vga_bios_error:
 870             fprintf(stderr, "qemu: could not load VGA BIOS '%s'\n", buf);
 871             exit(1);
 872         }
 873
 874         /* setup basic memory access */
 875         cpu_register_physical_memory(0xc0000, 0x10000,
 876                                      vga_bios_offset | IO_MEM_ROM);
 877     }
 878
 879     /* map the last 128KB of the BIOS in ISA space */
 880     isa_bios_size = bios_size;
 881     if (isa_bios_size > (128 * 1024))
 882         isa_bios_size = 128 * 1024;
 883     cpu_register_physical_memory(0x100000 - isa_bios_size,
 884                                  isa_bios_size,
 885                                  (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
 886
 887     {
 888         ram_addr_t option_rom_offset;
 889         int size, offset;
 890
 891         offset = 0;
 892         if (linux_boot) {
 893             option_rom_offset = qemu_ram_alloc(TARGET_PAGE_SIZE);
 894             load_linux(phys_ram_base + option_rom_offset,
 895                        kernel_filename, initrd_filename, kernel_cmdline);
 896             cpu_register_physical_memory(0xd0000, TARGET_PAGE_SIZE,
 897                                          option_rom_offset | IO_MEM_ROM);
 898             offset = TARGET_PAGE_SIZE;
 899         }
 900
 901         for (i = 0; i < nb_option_roms; i++) {
 902             size = get_image_size(option_rom[i]);
 903             if (size < 0) {
 904                 fprintf(stderr, "Could not load option rom '%s'\n",
 905                         option_rom[i]);
 906                 exit(1);
 907             }
 908             if (size > (0x10000 - offset))
 909                 goto option_rom_error;
 910             option_rom_offset = qemu_ram_alloc(size);
 911             ret = load_image(option_rom[i], phys_ram_base + option_rom_offset);
 912             if (ret != size) {
 913             option_rom_error:
 914                 fprintf(stderr, "Too many option ROMS\n");
 915                 exit(1);
 916             }
 917             size = (size + 4095) & ~4095;
 918             cpu_register_physical_memory(0xd0000 + offset,
 919                                          size, option_rom_offset | IO_MEM_ROM);
 920             offset += size;
 921         }
 922     }
 923
 924     /* map all the bios at the top of memory */
 925     cpu_register_physical_memory((uint32_t)(-bios_size),
 926                                  bios_size, bios_offset | IO_MEM_ROM);
 927
 928     bochs_bios_init();
 929
 930     cpu_irq = qemu_allocate_irqs(pic_irq_request, NULL, 1);
 931     i8259 = i8259_init(cpu_irq[0]);
 932     ferr_irq = i8259[13];
 933
 934     if (pci_enabled) {
 935         pci_bus = i440fx_init(&i440fx_state, i8259);
 936         piix3_devfn = piix3_init(pci_bus, -1);
 937     } else {
 938         pci_bus = NULL;
 939     }
 940
 941     /* init basic PC hardware */
 942     register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
 943
 944     register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
 945
 946     if (cirrus_vga_enabled) {
 947         if (pci_enabled) {
 948             pci_cirrus_vga_init(pci_bus,
 949                                 phys_ram_base + vga_ram_addr,
 950                                 vga_ram_addr, vga_ram_size);
 951         } else {
 952             isa_cirrus_vga_init(phys_ram_base + vga_ram_addr,
 953                                 vga_ram_addr, vga_ram_size);
 954         }
 955     } else if (vmsvga_enabled) {
 956         if (pci_enabled)
 957             pci_vmsvga_init(pci_bus, phys_ram_base + vga_ram_addr,
 958                             vga_ram_addr, vga_ram_size);
 959         else
 960             fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
 961     } else if (std_vga_enabled) {
 962         if (pci_enabled) {
 963             pci_vga_init(pci_bus, phys_ram_base + vga_ram_addr,
 964                          vga_ram_addr, vga_ram_size, 0, 0);
 965         } else {
 966             isa_vga_init(phys_ram_base + vga_ram_addr,
 967                          vga_ram_addr, vga_ram_size);
 968         }
 969     }
 970
 971     rtc_state = rtc_init(0x70, i8259[8], 2000);
 972
 973     qemu_register_boot_set(pc_boot_set, rtc_state);
 974
 975     register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
 976     register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
 977
 978     if (pci_enabled) {
 979         ioapic = ioapic_init();
 980     }
 981     pit = pit_init(0x40, i8259[0]);
 982     pcspk_init(pit);
 983     if (!no_hpet) {
 984         hpet_init(i8259);
 985     }
 986     if (pci_enabled) {
 987         pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
 988     }
 989
 990     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
 991         if (serial_hds[i]) {
 992             serial_init(serial_io[i], i8259[serial_irq[i]], 115200,
 993                         serial_hds[i]);
 994         }
 995     }
 996
 997     for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
 998         if (parallel_hds[i]) {
 999             parallel_init(parallel_io[i], i8259[parallel_irq[i]],
1000                           parallel_hds[i]);
1001         }
1002     }
1003
1004     for(i = 0; i < nb_nics; i++) {
1005         NICInfo *nd = &nd_table[i];
1006
1007         if (!pci_enabled || (nd->model && strcmp(nd->model, "ne2k_isa") == 0))
1008             pc_init_ne2k_isa(nd, i8259);
1009         else
1010             pci_nic_init(pci_bus, nd, -1, "ne2k_pci");
1011     }
1012
1013     qemu_system_hot_add_init();
1014
1015     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
1016         fprintf(stderr, "qemu: too many IDE bus\n");
1017         exit(1);
1018     }
1019
1020     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
1021         index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
1022         if (index != -1)
1023             hd[i] = drives_table[index].bdrv;
1024         else
1025             hd[i] = NULL;
1026     }
1027
1028     if (pci_enabled) {
1029         pci_piix3_ide_init(pci_bus, hd, piix3_devfn + 1, i8259);
1030     } else {
1031         for(i = 0; i < MAX_IDE_BUS; i++) {
1032             isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
1033                          hd[MAX_IDE_DEVS * i], hd[MAX_IDE_DEVS * i + 1]);
1034         }
1035     }
1036
1037     i8042_init(i8259[1], i8259[12], 0x60);
1038     DMA_init(0);
1039 #ifdef HAS_AUDIO
1040     audio_init(pci_enabled ? pci_bus : NULL, i8259);
1041 #endif
1042
1043     for(i = 0; i < MAX_FD; i++) {
1044         index = drive_get_index(IF_FLOPPY, 0, i);
1045         if (index != -1)
1046             fd[i] = drives_table[index].bdrv;
1047         else
1048             fd[i] = NULL;
1049     }
1050     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd);
1051
1052     cmos_init(below_4g_mem_size, above_4g_mem_size, boot_device, hd);
1053
1054     if (pci_enabled && usb_enabled) {
1055         usb_uhci_piix3_init(pci_bus, piix3_devfn + 2);
1056     }
1057
1058     if (pci_enabled && acpi_enabled) {
1059         uint8_t *eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
1060         i2c_bus *smbus;
1061
1062         /* TODO: Populate SPD eeprom data.  */
1063         smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100, i8259[9]);
1064         for (i = 0; i < 8; i++) {
1065             smbus_eeprom_device_init(smbus, 0x50 + i, eeprom_buf + (i * 256));
1066         }
1067     }
1068
1069     if (i440fx_state) {
1070         i440fx_init_memory_mappings(i440fx_state);
1071     }
1072
1073     if (pci_enabled) {
1074         int max_bus;
1075         int bus, unit;
1076         void *scsi;
1077
1078         max_bus = drive_get_max_bus(IF_SCSI);
1079
1080         for (bus = 0; bus <= max_bus; bus++) {
1081             scsi = lsi_scsi_init(pci_bus, -1);
1082             for (unit = 0; unit < LSI_MAX_DEVS; unit++) {
1083                 index = drive_get_index(IF_SCSI, bus, unit);
1084                 if (index == -1)
1085                     continue;
1086                 lsi_scsi_attach(scsi, drives_table[index].bdrv, unit);
1087             }
1088         }
1089     }
1090
1091     /* Add virtio block devices */
1092     if (pci_enabled) {
1093         int index;
1094         int unit_id = 0;
1095
1096         while ((index = drive_get_index(IF_VIRTIO, 0, unit_id)) != -1) {
1097             virtio_blk_init(pci_bus, drives_table[index].bdrv);
1098             unit_id++;
1099         }
1100     }
1101
1102     /* Add virtio balloon device */
1103     if (pci_enabled)
1104         virtio_balloon_init(pci_bus);
1105
1106     /* Add virtio console devices */
1107     if (pci_enabled) {
1108         for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
1109             if (virtcon_hds[i])
1110                 virtio_console_init(pci_bus, virtcon_hds[i]);
1111         }
1112     }
1113 }
1114
1115 static void pc_init_pci(ram_addr_t ram_size, int vga_ram_size,
1116                         const char *boot_device,
1117                         const char *kernel_filename,
1118                         const char *kernel_cmdline,
1119                         const char *initrd_filename,
1120                         const char *cpu_model)
1121 {
1122     pc_init1(ram_size, vga_ram_size, boot_device,
1123              kernel_filename, kernel_cmdline,
1124              initrd_filename, 1, cpu_model);
1125 }
1126
1127 static void pc_init_isa(ram_addr_t ram_size, int vga_ram_size,
1128                         const char *boot_device,
1129                         const char *kernel_filename,
1130                         const char *kernel_cmdline,
1131                         const char *initrd_filename,
1132                         const char *cpu_model)
1133 {
1134     pc_init1(ram_size, vga_ram_size, boot_device,
1135              kernel_filename, kernel_cmdline,
1136              initrd_filename, 0, cpu_model);
1137 }
1138
1139 /* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
1140    BIOS will read it and start S3 resume at POST Entry */
1141 void cmos_set_s3_resume(void)
1142 {
1143     if (rtc_state)
1144         rtc_set_memory(rtc_state, 0xF, 0xFE);
1145 }
1146
1147 QEMUMachine pc_machine = {
1148     .name = "pc",
1149     .desc = "Standard PC",
1150     .init = pc_init_pci,
1151     .ram_require = VGA_RAM_SIZE + PC_MAX_BIOS_SIZE,
1152     .max_cpus = 255,
1153 };
1154
1155 QEMUMachine isapc_machine = {
1156     .name = "isapc",
1157     .desc = "ISA-only PC",
1158     .init = pc_init_isa,
1159     .ram_require = VGA_RAM_SIZE + PC_MAX_BIOS_SIZE,
1160     .max_cpus = 1,
1161 };