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   1 /*
   2  *  Copyright (C) 2001-2003 Hewlett-Packard Co.
   3  *      Contributed by Stephane Eranian <eranian@hpl.hp.com>
   4  *      Contributed by Mike Johnston <johnston@intel.com>
   5  *      Contributed by Chris Ahna <christopher.j.ahna@intel.com>
   6  *
   7  * This file is part of the ELILO, the EFI Linux boot loader.
   8  *
   9  *  ELILO is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2, or (at your option)
  12  *  any later version.
  13  *
  14  *  ELILO is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with ELILO; see the file COPYING.  If not, write to the Free
  21  *  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  22  *  02111-1307, USA.
  23  *
  24  * Please check out the elilo.txt for complete documentation on how
  25  * to use this program.
  26  */
  27
  28 /*
  29  * This file contains all the IA-32 specific code expected by generic loader
  30  */
  31 #include <efi.h>
  32 #include <efilib.h>
  33
  34 #include "elilo.h"
  35 #include "loader.h"
  36 #include "rmswitch.h"
  37
  38 extern loader_ops_t bzimage_loader, plain_loader, gzip_loader;
  39
  40 /*
  41  * Descriptor table base addresses & limits for Linux startup.
  42  */
  43
  44 dt_addr_t gdt_addr = { 0x800, 0x94000 };
  45 dt_addr_t idt_addr = { 0, 0 };
  46
  47 /*
  48  * Initial GDT layout for Linux startup.
  49  */
  50
  51 UINT16 init_gdt[] = {
  52         /* gdt[0]: dummy */
  53         0, 0, 0, 0,
  54
  55         /* gdt[1]: unused */
  56         0, 0, 0, 0,
  57
  58         /* gdt[2]: code */
  59         0xFFFF,         /* 4Gb - (0x100000*0x1000 = 4Gb) */
  60         0x0000,         /* base address=0 */
  61         0x9A00,         /* code read/exec */
  62         0x00CF,         /* granularity=4096, 386 (+5th nibble of limit) */
  63
  64         /* gdt[3]: data */
  65         0xFFFF,         /* 4Gb - (0x100000*0x1000 = 4Gb) */
  66         0x0000,         /* base address=0 */
  67         0x9200,         /* data read/write */
  68         0x00CF,         /* granularity=4096, 386 (+5th nibble of limit) */
  69 };
  70
  71 UINTN sizeof_init_gdt = sizeof init_gdt;
  72
  73 /*
  74  * Highest available base memory address.
  75  *
  76  * For traditional kernels and loaders this is always at 0x90000.
  77  * For updated kernels and loaders this is computed by taking the
  78  * highest available base memory address and rounding down to the
  79  * nearest 64 kB boundary and then subtracting 64 kB.
  80  *
  81  * A non-compressed kernel is automatically assumed to be an updated
  82  * kernel.  A compressed kernel that has bit 6 (0x40) set in the
  83  * loader_flags field is also assumed to be an updated kernel.
  84  */
  85
  86 UINTN high_base_mem = 0x90000;
  87
  88 /*
  89  * Highest available extended memory address.
  90  *
  91  * This is computed by taking the highest available extended memory
  92  * address and rounding down to the nearest EFI_PAGE_SIZE (usually
  93  * 4 kB) boundary.
  94  * This is only used for backward compatibility.
  95  */
  96
  97 UINTN high_ext_mem = 32 * 1024 * 1024;
  98
  99 /* This starting address will hold true for all of the loader types for now */
 100 VOID *kernel_start = (VOID *)DEFAULT_KERNEL_START;
 101
 102 /* The kernel may load elsewhere if EFI firmware reserves kernel_start */
 103 VOID *kernel_load_address = (VOID *)DEFAULT_KERNEL_START;
 104
 105 VOID *initrd_start = NULL;
 106 UINTN initrd_size = 0;
 107
 108 INTN
 109 sysdeps_init(EFI_HANDLE dev)
 110 {
 111         DBG_PRT((L"sysdeps_init()\n"));
 112
 113         /*
 114          * Register our loader(s)...
 115          */
 116
 117         loader_register(&bzimage_loader);
 118         loader_register(&plain_loader);
 119         loader_register(&gzip_loader);
 120         return 0;
 121 }
 122
 123 /*
 124  * initrd_get_addr()
 125  *      Compute a starting address for the initial RAMdisk image.
 126  *      For now, this image is placed immediately after the end of
 127  *      the kernel memory.  Inside the start_kernel() code, the
 128  *      RAMdisk image will be relocated to the top of available
 129  *      extended memory.
 130  */
 131 INTN
 132 sysdeps_initrd_get_addr(kdesc_t *kd, memdesc_t *imem)
 133 {
 134         DBG_PRT((L"initrd_get_addr()\n"));
 135
 136         if (!kd || !imem) {
 137                 ERR_PRT((L"kd=" PTR_FMT " imem=" PTR_FMT, kd, imem));
 138                 return -1;
 139         }
 140
 141         VERB_PRT(3, Print(L"kstart=" PTR_FMT "  kentry=" PTR_FMT "  kend=" PTR_FMT "\n",
 142                 kd->kstart, kd->kentry, kd->kend));
 143
 144         imem->start_addr = kd->kend;
 145
 146         VERB_PRT(3, Print(L"initrd start_addr=" PTR_FMT " pgcnt=%d\n",
 147                 imem->start_addr, imem->pgcnt));
 148
 149         return 0;
 150 }
 151
 152 VOID *
 153 sysdeps_checkfix_initrd(VOID *start_addr, memdesc_t *imem)
 154 {
 155         return start_addr;
 156 }
 157
 158 VOID
 159 sysdeps_free_boot_params(boot_params_t *bp)
 160 {
 161         mmap_desc_t md;
 162
 163         ZeroMem(&md, sizeof md);
 164         md.md = (VOID *)bp->s.efi_mem_map;
 165         free_memmap(&md);
 166 }
 167
 168 static VOID find_bits(unsigned long mask, UINT8 *first, UINT8* len) {
 169         unsigned char bit_pos = 0, bit_len = 0;
 170         *first =0;
 171         *len = 0;
 172         if (mask == 0)
 173                 return;
 174         while (!(mask & 0x1)) {
 175                 mask = mask >> 1;
 176                 bit_pos++;
 177         }
 178         while (mask & 0x1) {
 179                 mask = mask >> 1;
 180                 bit_len++;
 181         }
 182         *first = bit_pos;
 183         *len = bit_len;
 184 }
 185
 186 /*
 187  * Get video information.
 188  */
 189 static INTN get_video_info(boot_params_t * bp) {
 190         EFI_GUID GopProtocol = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
 191         EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop_interface;
 192         EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Gop_info;
 193         EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE   *Gop_mode = NULL;
 194         EFI_HANDLE *Gop_handle = NULL;
 195         EFI_STATUS efi_status;
 196         UINTN size = 0;
 197         UINTN size1;
 198         UINT8 i;
 199
 200         efi_status = uefi_call_wrapper(
 201                         BS->LocateHandle,
 202                         5,
 203                         ByProtocol,
 204                         &GopProtocol,
 205                         NULL,
 206                         &size,
 207                         (VOID **)Gop_handle);
 208
 209         if (EFI_ERROR(efi_status) && efi_status != EFI_BUFFER_TOO_SMALL) {
 210                 Print(L"LocateHandle GopProtocol failed.\n");
 211                 Print(L"--Either no graphics head is installed,\n" \
 212                        "--efi console is set to serial, or,\n" \
 213                        "--the EFI firmware version of this machine is\n" \
 214                        "--older than UEFI 2.0. and does not support GOP");
 215                 Print(L"you can SAFELY IGNORE this error. elilo will\n" \
 216                        "default to text-mode.\n Alternatively you can " \
 217                        "now force text mode by setting config variable\n" \
 218                        "text_mode=1 for x86 in elilo.conf or via cmdline.\n\n");
 219                 Print(L"However if this is the last text output you see\n" \
 220                        "ensure that your kernel console command line\n " \
 221                        "variable matches up with the actual efi boot menu\n" \
 222                        "console output settings. for example efi console\n\n");
 223                 return -1;
 224         }
 225         Gop_handle = alloc(size, 0);
 226         efi_status = uefi_call_wrapper(
 227                         BS->LocateHandle,
 228                         5,
 229                         ByProtocol,
 230                         &GopProtocol,
 231                         NULL,
 232                         &size,
 233                         (VOID **)Gop_handle);
 234         if (EFI_ERROR(efi_status)) {
 235                 ERR_PRT((L"LocateHandle GopProtocol failed."));
 236                 free(Gop_handle);
 237                 return -1;
 238         }
 239
 240         for (i=0; i < size/sizeof(EFI_HANDLE); i++) {
 241                 Gop_handle += i;
 242                 efi_status = uefi_call_wrapper(
 243                                 BS->HandleProtocol,
 244                                 3,
 245                                 *Gop_handle,
 246                                 &GopProtocol,
 247                                 (VOID **) &Gop_interface);
 248
 249                 if (EFI_ERROR(efi_status)) {
 250                         continue;
 251                 }
 252                 Gop_mode = Gop_interface->Mode;
 253                 efi_status = uefi_call_wrapper(
 254                                 Gop_interface->QueryMode,
 255                                 4,
 256                                 Gop_interface,
 257                                 Gop_mode->Mode,
 258                                 &size1,
 259                                 &Gop_info);
 260                 if (!EFI_ERROR(efi_status))
 261                         break;
 262                 if (EFI_ERROR(efi_status)) {
 263                         continue;
 264                 }
 265         }
 266         if (EFI_ERROR(efi_status) || i > (size/sizeof(EFI_HANDLE))) {
 267                 ERR_PRT((L"HandleProtocol GopProtocol failed."));
 268                 free(Gop_handle);
 269                 return -1;
 270         }
 271
 272         bp->s.is_vga = 0x70;
 273         bp->s.orig_cursor_col = 0;
 274         bp->s.orig_cursor_row = 0;
 275         bp->s.orig_video_page = 0;
 276         bp->s.orig_video_mode = 0;
 277         bp->s.orig_video_cols = 0;
 278         bp->s.orig_video_rows = 0;
 279         bp->s.orig_ega_bx = 0;
 280         bp->s.orig_video_points = 0;
 281
 282         bp->s.lfb_width = Gop_info->HorizontalResolution;
 283         bp->s.lfb_height = Gop_info->VerticalResolution;
 284         bp->s.lfb_base = Gop_mode->FrameBufferBase;
 285         bp->s.lfb_size = Gop_mode->FrameBufferSize;
 286         bp->s.lfb_pages = 1;
 287         bp->s.vesa_seg = 0;
 288         bp->s.vesa_off = 0;
 289         if (Gop_info->PixelFormat == PixelRedGreenBlueReserved8BitPerColor) {
 290                 bp->s.lfb_depth = 32;
 291                 bp->s.lfb_red_size = 8;
 292                 bp->s.lfb_red_pos = 0;
 293                 bp->s.lfb_green_size = 8;
 294                 bp->s.lfb_green_pos = 8;
 295                 bp->s.lfb_blue_size = 8;
 296                 bp->s.lfb_blue_pos = 16;
 297                 bp->s.lfb_rsvd_size = 8;
 298                 bp->s.lfb_rsvd_pos = 24;
 299                 bp->s.lfb_line_len = Gop_info->PixelsPerScanLine * 4;
 300
 301         } else if (Gop_info->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
 302                 bp->s.lfb_depth = 32;
 303                 bp->s.lfb_red_size = 8;
 304                 bp->s.lfb_red_pos = 16;
 305                 bp->s.lfb_green_size = 8;
 306                 bp->s.lfb_green_pos = 8;
 307                 bp->s.lfb_blue_size = 8;
 308                 bp->s.lfb_blue_pos = 0;
 309                 bp->s.lfb_rsvd_size = 8;
 310                 bp->s.lfb_rsvd_pos = 24;
 311                 bp->s.lfb_line_len = Gop_info->PixelsPerScanLine * 4;
 312         } else if (Gop_info->PixelFormat == PixelBitMask) {
 313                 find_bits(Gop_info->PixelInformation.RedMask,
 314                           &bp->s.lfb_red_pos, &bp->s.lfb_red_size);
 315                 find_bits(Gop_info->PixelInformation.GreenMask,
 316                           &bp->s.lfb_green_pos, &bp->s.lfb_green_size);
 317                 find_bits(Gop_info->PixelInformation.BlueMask,
 318                           &bp->s.lfb_blue_pos, &bp->s.lfb_blue_size);
 319                 find_bits(Gop_info->PixelInformation.ReservedMask,
 320                           &bp->s.lfb_rsvd_pos, &bp->s.lfb_rsvd_size);
 321                 bp->s.lfb_depth = bp->s.lfb_red_size + bp->s.lfb_green_size +
 322                                   bp->s.lfb_blue_size + bp->s.lfb_rsvd_size;
 323                 bp->s.lfb_line_len = (Gop_info->PixelsPerScanLine * bp->s.lfb_depth) / 8;
 324         } else {
 325                 bp->s.lfb_depth = 4;
 326                 bp->s.lfb_red_size = 0;
 327                 bp->s.lfb_red_pos = 0;
 328                 bp->s.lfb_green_size = 0;
 329                 bp->s.lfb_green_pos = 0;
 330                 bp->s.lfb_blue_size = 0;
 331                 bp->s.lfb_blue_pos = 0;
 332                 bp->s.lfb_rsvd_size = 0;
 333                 bp->s.lfb_rsvd_pos = 0;
 334                 bp->s.lfb_line_len = bp->s.lfb_width / 2;
 335         }
 336         return 0;
 337 }
 338
 339 /* Convert EFI memory map to E820 map for the operating system
 340  * This code is based on a Linux kernel patch submitted by Edgar Hucek
 341  */
 342
 343 /* Add a memory region to the e820 map */
 344 static void add_memory_region (struct e820entry *e820_map,
 345                                int *e820_nr_map,
 346                                UINT64 start,
 347                                UINT64 size,
 348                                UINT32 type)
 349 {
 350         int x = *e820_nr_map;
 351
 352         if (x == E820_MAX) {
 353                 Print(L"Too many entries in the memory map!\n");
 354                 return;
 355         }
 356
 357         if ((x > 0) && e820_map[x-1].addr + e820_map[x-1].size == start
 358             && e820_map[x-1].type == type)
 359                 e820_map[x-1].size += size;
 360         else {
 361                 e820_map[x].addr = start;
 362                 e820_map[x].size = size;
 363                 e820_map[x].type = type;
 364                 (*e820_nr_map)++;
 365         }
 366 }
 367
 368 void fill_e820map(boot_params_t *bp, mmap_desc_t *mdesc)
 369 {
 370         int nr_map, e820_nr_map = 0, i;
 371         UINT64 start, end, size;
 372         EFI_MEMORY_DESCRIPTOR   *md, *p;
 373         struct e820entry *e820_map;
 374
 375         nr_map = mdesc->map_size/mdesc->desc_size;
 376         e820_map = (struct e820entry *)bp->s.e820_map;
 377
 378         for (i = 0, p = mdesc->md; i < nr_map; i++)
 379         {
 380                 md = p;
 381                 switch (md->Type) {
 382                 case EfiACPIReclaimMemory:
 383                         add_memory_region(e820_map, &e820_nr_map,
 384                                           md->PhysicalStart,
 385                                           md->NumberOfPages << EFI_PAGE_SHIFT,
 386                                           E820_ACPI);
 387                         break;
 388                 case EfiRuntimeServicesCode:
 389                 case EfiRuntimeServicesData:
 390                 case EfiReservedMemoryType:
 391                 case EfiMemoryMappedIO:
 392                 case EfiMemoryMappedIOPortSpace:
 393                 case EfiUnusableMemory:
 394                 case EfiPalCode:
 395                         add_memory_region(e820_map, &e820_nr_map,
 396                                           md->PhysicalStart,
 397                                           md->NumberOfPages << EFI_PAGE_SHIFT,
 398                                           E820_RESERVED);
 399                         break;
 400                 case EfiLoaderCode:
 401                 case EfiLoaderData:
 402                 case EfiBootServicesCode:
 403                 case EfiBootServicesData:
 404                 case EfiConventionalMemory:
 405                         start = md->PhysicalStart;
 406                         size = md->NumberOfPages << EFI_PAGE_SHIFT;
 407                         end = start + size;
 408                         /* Fix up for BIOS that claims RAM in 640K-1MB region */
 409                         if (start < 0x100000ULL && end > 0xA0000ULL) {
 410                                 if (start < 0xA0000ULL) {
 411                                         /* start < 640K
 412                                          * set memory map from start to 640K
 413                                          */
 414                                         add_memory_region(e820_map,
 415                                                           &e820_nr_map,
 416                                                           start,
 417                                                           0xA0000ULL-start,
 418                                                           E820_RAM);
 419                                 }
 420                                 if (end <= 0x100000ULL)
 421                                         continue;
 422                                 /* end > 1MB
 423                                  * set memory map avoiding 640K to 1MB hole
 424                                  */
 425                                 start = 0x100000ULL;
 426                                 size = end - start;
 427                         }
 428                         add_memory_region(e820_map, &e820_nr_map,
 429                                           start, size, E820_RAM);
 430                         break;
 431                 case EfiACPIMemoryNVS:
 432                         add_memory_region(e820_map, &e820_nr_map,
 433                                           md->PhysicalStart,
 434                                           md->NumberOfPages << EFI_PAGE_SHIFT,
 435                                           E820_NVS);
 436                         break;
 437                 default:
 438                         /* We should not hit this case */
 439                         add_memory_region(e820_map, &e820_nr_map,
 440                                           md->PhysicalStart,
 441                                           md->NumberOfPages << EFI_PAGE_SHIFT,
 442                                           E820_RESERVED);
 443                         break;
 444                 }
 445                 p = NextMemoryDescriptor(p, mdesc->desc_size);
 446         }
 447         bp->s.e820_nrmap = e820_nr_map;
 448 }
 449
 450 /*
 451  * IA-32 specific boot parameters initialization routine
 452  */
 453 INTN
 454 sysdeps_create_boot_params(
 455         boot_params_t *bp,
 456         CHAR8 *cmdline,
 457         memdesc_t *initrd,
 458         memdesc_t *vmcode, /* no use for ia32 now*/
 459         UINTN *cookie)
 460 {
 461         mmap_desc_t mdesc;
 462         EFI_STATUS efi_status;
 463         UINTN rows, cols;
 464         UINT8 row, col;
 465         UINT8 mode;
 466         UINT16 hdr_version;
 467
 468         DBG_PRT((L"fill_boot_params()\n"));
 469
 470         if (!bp || !cmdline || !initrd || !cookie) {
 471                 ERR_PRT((L"bp=" PTR_FMT "  cmdline=" PTR_FMT "  initrd=" PTR_FMT " cookie=" PTR_FMT,
 472                         bp, cmdline, initrd, cookie));
 473
 474                 if (param_start != NULL) {
 475                         free(param_start);
 476                         param_start = NULL;
 477                         param_size = 0;
 478                 }
 479                 free_kmem();
 480                 return -1;
 481         }
 482
 483         /*
 484          * Copy temporary boot sector and setup data storage to
 485          * elilo allocated boot parameter storage.  We only need
 486          * the first two sectors (1K).  The rest of the storage
 487          * can be used by the command line.
 488          */
 489         if (param_start != NULL) {
 490                 CopyMem(bp, param_start, 0x2000);
 491                 free(param_start);
 492                 param_start = NULL;
 493                 param_size = 0;
 494         }
 495         /*
 496          * Save off our header revision information.
 497          */
 498         hdr_version = (bp->s.hdr_major << 8) | bp->s.hdr_minor;
 499
 500         /*
 501          * Clear out unused memory in boot sector image.
 502          */
 503         bp->s.unused_1 = 0;
 504         bp->s.unused_2 = 0;
 505         ZeroMem(bp->s.unused_3, sizeof bp->s.unused_3);
 506         ZeroMem(bp->s.unused_4, sizeof bp->s.unused_4);
 507         ZeroMem(&bp->s.unused_51, sizeof bp->s.unused_51);
 508         ZeroMem(bp->s.unused_52, sizeof bp->s.unused_52);
 509         bp->s.unused_6 = 0;
 510         bp->s.unused_7 = 0;
 511         ZeroMem(bp->s.unused_8, sizeof bp->s.unused_8);
 512
 513         /*
 514          * Tell kernel this was loaded by an advanced loader type.
 515          * If this field is zero, the initrd_start and initrd_size
 516          * fields are ignored by the kernel.
 517          */
 518
 519         bp->s.loader_type = LDRTYPE_ELILO;
 520
 521         /*
 522          * Setup command line information.
 523          */
 524
 525         bp->s.cmdline_magik = CMDLINE_MAGIK;
 526         bp->s.cmdline_offset = (UINT8 *)cmdline - (UINT8 *)bp;
 527
 528         /*
 529          * Clear out the cmdline_addr field so the kernel can find
 530          * the cmdline.
 531          */
 532         bp->s.cmdline_addr = 0x0;
 533
 534         /*
 535          * Setup hard drive parameters.
 536          * %%TBD - It should be okay to zero fill the hard drive
 537          * info buffers.  The kernel should do its own detection.
 538          */
 539
 540         ZeroMem(bp->s.hd0_info, sizeof bp->s.hd0_info);
 541         ZeroMem(bp->s.hd1_info, sizeof bp->s.hd1_info);
 542
 543         /*
 544          * Memory info.
 545          */
 546
 547         bp->s.alt_mem_k = high_ext_mem / 1024;
 548
 549         if (bp->s.alt_mem_k <= 65535)
 550                 bp->s.ext_mem_k = (UINT16)bp->s.alt_mem_k;
 551         else
 552                 bp->s.ext_mem_k = 65535;
 553
 554         /*
 555          * Initial RAMdisk and root device stuff.
 556          */
 557
 558         DBG_PRT((L"initrd->start_addr=" PTR_FMT "  initrd->pgcnt=%d\n",
 559                 initrd->start_addr, initrd->pgcnt));
 560
 561         /* These RAMdisk flags are not needed, just zero them. */
 562         bp->s.ramdisk_flags = 0;
 563
 564         if (initrd->start_addr && initrd->pgcnt) {
 565                 /* %%TBD - This will probably have to be changed. */
 566                 bp->s.initrd_start = (UINT32)initrd->start_addr;
 567                 bp->s.initrd_size = (UINT32)(initrd->size);
 568
 569                 /*
 570                  * This is the RAMdisk root device for RedHat 2.2.x
 571                  * kernels (major 0x01, minor 0x00).
 572                  */
 573
 574                 bp->s.orig_root_dev = 0x0100;
 575         } else {
 576                 bp->s.initrd_start = 0;
 577                 bp->s.initrd_size = 0;
 578         }
 579
 580         /*
 581          * APM BIOS info.
 582          */
 583         bp->s.apm_bios_ver = NO_APM_BIOS;
 584         bp->s.bios_code_seg = 0;
 585         bp->s.bios_entry_point = 0;
 586         bp->s.bios_code_seg16 = 0;
 587         bp->s.bios_data_seg = 0;
 588         bp->s.apm_bios_flags = 0;
 589         bp->s.bios_code_len = 0;
 590         bp->s.bios_data_len = 0;
 591
 592         /*
 593          * MCA BIOS info (misnomer).
 594          */
 595         bp->s.mca_info_len = 0;
 596         ZeroMem(bp->s.mca_info_buf, sizeof bp->s.mca_info_buf);
 597
 598         /*
 599          * Pointing device presence.  The kernel will detect this.
 600          */
 601         bp->s.aux_dev_info = NO_MOUSE;
 602
 603         /*
 604          * EFI loader signature
 605          */
 606         CopyMem(bp->s.efi_loader_sig, EFI_LOADER_SIG_IA32, 4);
 607
 608         /*
 609          * Kernel entry point.
 610          */
 611         bp->s.kernel_start = (UINT32)kernel_start;
 612
 613         /*
 614          * When changing stuff in the parameter structure compare
 615          * the offsets of the fields with the offsets used in the
 616          * boot sector and setup source files.
 617          *   arch/i386/boot/bootsect.S
 618          *   arch/i386/boot/setup.S
 619          *   arch/i386/kernel/setup.c
 620          *   include/asm-i386/setup.h (2.5/2.6)
 621          */
 622
 623 #define CHECK_OFFSET(n, o, f) \
 624 { \
 625         UINTN p = (UINT8 *)&bp->s.n - (UINT8 *)bp; \
 626         UINTN q = (UINTN)(o); \
 627         if (p != q) { \
 628                 test |= 1; \
 629                 Print(L"%20a:  %3xh  %3xh  ", #n, p, q); \
 630                 if (*f) { \
 631                         Print(f, bp->s.n); \
 632                 } \
 633                 Print(L"\n"); \
 634         } \
 635 }
 636
 637 #define WAIT_FOR_KEY() \
 638 { \
 639         EFI_INPUT_KEY key; \
 640         while (uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key) != EFI_SUCCESS) { \
 641                 ; \
 642         } \
 643 }
 644         {
 645                 UINTN test = 0;
 646
 647                 CHECK_OFFSET(orig_cursor_col, 0x00, L"%xh");
 648                 CHECK_OFFSET(orig_cursor_row, 0x01, L"%xh");
 649                 CHECK_OFFSET(ext_mem_k, 0x02, L"%xh");
 650                 CHECK_OFFSET(orig_video_page, 0x04, L"%xh");
 651                 CHECK_OFFSET(orig_video_mode, 0x06, L"%xh");
 652                 CHECK_OFFSET(orig_video_cols, 0x07, L"%xh");
 653                 CHECK_OFFSET(orig_ega_bx, 0x0A, L"%xh");
 654                 CHECK_OFFSET(orig_video_rows, 0x0E, L"%xh");
 655                 CHECK_OFFSET(is_vga, 0x0F, L"%xh");
 656                 CHECK_OFFSET(orig_video_points, 0x10, L"%xh");
 657                 CHECK_OFFSET(lfb_width, 0x12, L"%xh");
 658                 CHECK_OFFSET(lfb_height, 0x14, L"%xh");
 659                 CHECK_OFFSET(lfb_depth, 0x16, L"%xh");
 660                 CHECK_OFFSET(lfb_base, 0x18, L"%xh");
 661                 CHECK_OFFSET(lfb_size, 0x1C, L"%xh");
 662                 CHECK_OFFSET(cmdline_magik, 0x20, L"%xh");
 663                 CHECK_OFFSET(cmdline_offset, 0x22, L"%xh");
 664                 CHECK_OFFSET(lfb_line_len, 0x24, L"%xh");
 665                 CHECK_OFFSET(lfb_red_size, 0x26, L"%xh");
 666                 CHECK_OFFSET(lfb_red_pos, 0x27, L"%xh");
 667                 CHECK_OFFSET(lfb_green_size, 0x28, L"%xh");
 668                 CHECK_OFFSET(lfb_green_pos, 0x29, L"%xh");
 669                 CHECK_OFFSET(lfb_blue_size, 0x2A, L"%xh");
 670                 CHECK_OFFSET(lfb_blue_pos, 0x2B, L"%xh");
 671                 CHECK_OFFSET(lfb_rsvd_size, 0x2C, L"%xh");
 672                 CHECK_OFFSET(lfb_rsvd_pos, 0x2D, L"%xh");
 673                 CHECK_OFFSET(vesa_seg, 0x2E, L"%xh");
 674                 CHECK_OFFSET(vesa_off, 0x30, L"%xh");
 675                 CHECK_OFFSET(lfb_pages, 0x32, L"%xh");
 676                 CHECK_OFFSET(lfb_reserved, 0x34, L"");
 677                 CHECK_OFFSET(apm_bios_ver, 0x40, L"%xh");
 678                 CHECK_OFFSET(bios_code_seg, 0x42, L"%xh");
 679                 CHECK_OFFSET(bios_entry_point, 0x44, L"%xh");
 680                 CHECK_OFFSET(bios_code_seg16, 0x48, L"%xh");
 681                 CHECK_OFFSET(bios_data_seg, 0x4A, L"%xh");
 682                 CHECK_OFFSET(apm_bios_flags, 0x4C, L"%xh");
 683                 CHECK_OFFSET(bios_code_len, 0x4E, L"%xh");
 684                 CHECK_OFFSET(bios_data_len, 0x52, L"%xh");
 685                 CHECK_OFFSET(hd0_info, 0x80, L"");
 686                 CHECK_OFFSET(hd1_info, 0x90, L"");
 687                 CHECK_OFFSET(mca_info_len, 0xA0, L"%xh");
 688                 CHECK_OFFSET(mca_info_buf, 0xA2, L"");
 689                 CHECK_OFFSET(efi_loader_sig, 0x1C0, L"'%-4.4a'");
 690                 CHECK_OFFSET(efi_sys_tbl, 0x1C4, L"%xh");
 691                 CHECK_OFFSET(efi_mem_desc_size, 0x1C8, L"%xh");
 692                 CHECK_OFFSET(efi_mem_desc_ver, 0x1CC, L"%xh");
 693                 CHECK_OFFSET(efi_mem_map, 0x1D0, L"%xh");
 694                 CHECK_OFFSET(efi_mem_map_size, 0x1D4, L"%xh");
 695                 CHECK_OFFSET(loader_start, 0x1D8, L"%xh");
 696                 CHECK_OFFSET(loader_size, 0x1DC, L"%xh");
 697                 CHECK_OFFSET(alt_mem_k, 0x1E0, L"%xh");
 698                 CHECK_OFFSET(e820_nrmap, 0x1E8, L"%xh");
 699                 CHECK_OFFSET(setup_sectors, 0x1F1, L"%xh");
 700                 CHECK_OFFSET(mount_root_rdonly, 0x1F2, L"%xh");
 701                 CHECK_OFFSET(sys_size, 0x1F4, L"%xh");
 702                 CHECK_OFFSET(swap_dev, 0x1F6, L"%xh");
 703                 CHECK_OFFSET(ramdisk_flags, 0x1F8, L"%xh");
 704                 CHECK_OFFSET(video_mode_flag, 0x1FA, L"%xh");
 705                 CHECK_OFFSET(orig_root_dev, 0x1FC, L"%xh");
 706                 CHECK_OFFSET(aux_dev_info, 0x1FF, L"%xh");
 707                 CHECK_OFFSET(jump, 0x200, L"%xh");
 708                 CHECK_OFFSET(setup_sig, 0x202, L"'%-4.4a'");
 709                 CHECK_OFFSET(hdr_minor, 0x206, L"%xh");
 710                 CHECK_OFFSET(hdr_major, 0x207, L"%xh");
 711                 CHECK_OFFSET(rm_switch, 0x208, L"%xh");
 712                 CHECK_OFFSET(start_sys_seg, 0x20C, L"%xh");
 713                 CHECK_OFFSET(kernel_verstr_offset, 0x20E, L"%xh");
 714                 CHECK_OFFSET(loader_type, 0x210, L"%xh");
 715                 CHECK_OFFSET(loader_flags, 0x211, L"%xh");
 716                 CHECK_OFFSET(setup_move_size, 0x212, L"%xh");
 717                 CHECK_OFFSET(kernel_start, 0x214, L"%xh");
 718                 CHECK_OFFSET(initrd_start, 0x218, L"%xh");
 719                 CHECK_OFFSET(initrd_size, 0x21C, L"%xh");
 720                 CHECK_OFFSET(bootsect_helper, 0x220, L"%xh");
 721                 CHECK_OFFSET(heap_end_ptr, 0x224, L"%xh");
 722                 CHECK_OFFSET(cmdline_addr, 0x228, L"%xh");
 723                 CHECK_OFFSET(e820_map, 0x2D0, L"'%-2560.2560a'");
 724
 725                 if (test) {
 726                         ERR_PRT((L"Boot sector and/or setup parameter alignment error."));
 727                         free_kmem();
 728                         return -1;
 729                 }
 730         }
 731
 732         /*
 733          * Get video information.
 734          * Do this last so that any other cursor positioning done
 735          * in the fill routine gets accounted for.
 736          */
 737
 738         if (!get_video_info(bp)) goto do_memmap;
 739
 740         efi_status = uefi_call_wrapper(
 741                 ST->ConOut->QueryMode,
 742                 4,
 743                 ST->ConOut,
 744                 ST->ConOut->Mode->Mode,
 745                 &cols,
 746                 &rows);
 747
 748         if (EFI_ERROR(efi_status)) {
 749                 ERR_PRT((L"QueryMode failed.  Fake it."));
 750                 mode = 3;
 751                 rows = 25;
 752                 cols = 80;
 753                 row = 24;
 754                 col = 0;
 755         } else {
 756                 mode = (UINT8)ST->ConOut->Mode->Mode;
 757                 col = (UINT8)ST->ConOut->Mode->CursorColumn;
 758                 row = (UINT8)ST->ConOut->Mode->CursorRow;
 759         }
 760
 761         bp->s.orig_cursor_col = col;
 762         bp->s.orig_cursor_row = row;
 763         bp->s.orig_video_page = 0;
 764         bp->s.orig_video_mode = mode;
 765         bp->s.orig_video_cols = (UINT8)cols;
 766         bp->s.orig_video_rows = (UINT8)rows;
 767
 768         bp->s.orig_ega_bx = 0;
 769         bp->s.is_vga = 0;
 770         bp->s.orig_video_points = 16;
 771
 772         bp->s.lfb_width = 0;
 773         bp->s.lfb_height = 0;
 774         bp->s.lfb_depth = 0;
 775         bp->s.lfb_base = 0;
 776         bp->s.lfb_size = 0;
 777         bp->s.lfb_line_len = 0;
 778         bp->s.lfb_red_size = 0;
 779         bp->s.lfb_red_pos = 0;
 780         bp->s.lfb_green_size = 0;
 781         bp->s.lfb_green_pos = 0;
 782         bp->s.lfb_blue_size = 0;
 783         bp->s.lfb_blue_pos = 0;
 784         bp->s.lfb_rsvd_size = 0;
 785         bp->s.lfb_rsvd_pos = 0;
 786         bp->s.lfb_pages = 0;
 787         bp->s.vesa_seg = 0;
 788         bp->s.vesa_off = 0;
 789
 790 do_memmap:
 791         /*
 792          * Get memory map description and cookie for ExitBootServices()
 793          */
 794
 795         if (get_memmap(&mdesc)) {
 796                 ERR_PRT((L"Could not get memory map."));
 797                 free_kmem();
 798                 return -1;
 799         }
 800         *cookie = mdesc.cookie;
 801         bp->s.efi_mem_map = (UINTN)mdesc.md;
 802         bp->s.efi_mem_map_size = mdesc.map_size;
 803         bp->s.efi_mem_desc_size = mdesc.desc_size;
 804         bp->s.efi_mem_desc_ver = mdesc.desc_version;
 805         bp->s.efi_sys_tbl = (UINTN)systab;
 806         /* Now that we have EFI memory map, convert it to E820 map
 807          * and update the bootparam accordingly
 808          */
 809         fill_e820map(bp, &mdesc);
 810
 811         return 0;
 812 }