| 1 | /* |
| 2 | * QEMU S390 bootmap interpreter -- declarations |
| 3 | * |
| 4 | * Copyright 2014 IBM Corp. |
| 5 | * Author(s): Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> |
| 6 | * |
| 7 | * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| 8 | * your option) any later version. See the COPYING file in the top-level |
| 9 | * directory. |
| 10 | */ |
| 11 | #ifndef _PC_BIOS_S390_CCW_BOOTMAP_H |
| 12 | #define _PC_BIOS_S390_CCW_BOOTMAP_H |
| 13 | |
| 14 | #include "s390-ccw.h" |
| 15 | #include "virtio.h" |
| 16 | |
| 17 | typedef uint64_t block_number_t; |
| 18 | #define NULL_BLOCK_NR 0xffffffffffffffffULL |
| 19 | #define ERROR_BLOCK_NR 0xfffffffffffffffeULL |
| 20 | |
| 21 | #define FREE_SPACE_FILLER '\xAA' |
| 22 | |
| 23 | typedef struct ScsiBlockPtr { |
| 24 | uint64_t blockno; |
| 25 | uint16_t size; |
| 26 | uint16_t blockct; |
| 27 | uint8_t reserved[4]; |
| 28 | } __attribute__ ((packed)) ScsiBlockPtr; |
| 29 | |
| 30 | typedef struct FbaBlockPtr { |
| 31 | uint32_t blockno; |
| 32 | uint16_t size; |
| 33 | uint16_t blockct; |
| 34 | } __attribute__ ((packed)) FbaBlockPtr; |
| 35 | |
| 36 | typedef struct EckdCHS { |
| 37 | uint16_t cylinder; |
| 38 | uint16_t head; |
| 39 | uint8_t sector; |
| 40 | } __attribute__ ((packed)) EckdCHS; |
| 41 | |
| 42 | typedef struct EckdBlockPtr { |
| 43 | EckdCHS chs; /* cylinder/head/sector is an address of the block */ |
| 44 | uint16_t size; |
| 45 | uint8_t count; /* (size_in_blocks-1); |
| 46 | * it's 0 for TablePtr, ScriptPtr, and SectionPtr */ |
| 47 | } __attribute__ ((packed)) EckdBlockPtr; |
| 48 | |
| 49 | typedef struct LdEckdCHS { |
| 50 | uint32_t cylinder; |
| 51 | uint8_t head; |
| 52 | uint8_t sector; |
| 53 | } __attribute__ ((packed)) LdEckdCHS; |
| 54 | |
| 55 | typedef struct LdEckdBlockPtr { |
| 56 | LdEckdCHS chs; /* cylinder/head/sector is an address of the block */ |
| 57 | uint8_t reserved[4]; |
| 58 | uint16_t count; |
| 59 | uint32_t pad; |
| 60 | } __attribute__ ((packed)) LdEckdBlockPtr; |
| 61 | |
| 62 | /* bptr is used for CCW type IPL, while ldptr is for list-directed IPL */ |
| 63 | typedef union ExtEckdBlockPtr { |
| 64 | EckdBlockPtr bptr; |
| 65 | LdEckdBlockPtr ldptr; |
| 66 | } __attribute__ ((packed)) ExtEckdBlockPtr; |
| 67 | |
| 68 | typedef union BootMapPointer { |
| 69 | ScsiBlockPtr scsi; |
| 70 | FbaBlockPtr fba; |
| 71 | EckdBlockPtr eckd; |
| 72 | ExtEckdBlockPtr xeckd; |
| 73 | } __attribute__ ((packed)) BootMapPointer; |
| 74 | |
| 75 | typedef struct BootRecord { |
| 76 | uint8_t magic[4]; |
| 77 | uint32_t version; |
| 78 | uint64_t res1; |
| 79 | BootMapPointer pgt; |
| 80 | uint8_t reserved[510 - 32]; |
| 81 | uint16_t os_id; |
| 82 | } __attribute__ ((packed)) BootRecord; |
| 83 | |
| 84 | /* aka Program Table */ |
| 85 | typedef struct BootMapTable { |
| 86 | uint8_t magic[4]; |
| 87 | uint8_t reserved[12]; |
| 88 | BootMapPointer entry[]; |
| 89 | } __attribute__ ((packed)) BootMapTable; |
| 90 | |
| 91 | #define DER_SIGNATURE_FORMAT 1 |
| 92 | |
| 93 | typedef struct SignatureInformation { |
| 94 | uint8_t format; |
| 95 | uint8_t reserved[3]; |
| 96 | uint32_t sig_len; |
| 97 | } SignatureInformation; |
| 98 | |
| 99 | typedef union ComponentEntryData { |
| 100 | uint64_t load_psw; |
| 101 | uint64_t load_addr; |
| 102 | SignatureInformation sig_info; |
| 103 | } ComponentEntryData; |
| 104 | |
| 105 | typedef struct ComponentEntry { |
| 106 | ScsiBlockPtr data; |
| 107 | uint8_t pad[7]; |
| 108 | uint8_t component_type; |
| 109 | ComponentEntryData compdat; |
| 110 | } __attribute((packed)) ComponentEntry; |
| 111 | |
| 112 | typedef struct ComponentHeader { |
| 113 | uint8_t magic[4]; /* == "zIPL" */ |
| 114 | uint8_t type; /* == ZIPL_COMP_HEADER_* */ |
| 115 | uint8_t reserved[27]; |
| 116 | } __attribute((packed)) ComponentHeader; |
| 117 | |
| 118 | typedef struct ScsiMbr { |
| 119 | uint8_t magic[4]; |
| 120 | uint32_t version_id; |
| 121 | uint8_t reserved[8]; |
| 122 | ScsiBlockPtr pt; /* block pointer to program table */ |
| 123 | } __attribute__ ((packed)) ScsiMbr; |
| 124 | |
| 125 | /** |
| 126 | * zipl_load_segment |
| 127 | * @blockno: block number of the first BPRS describing the segment. |
| 128 | * @address: guest physical address at which to load the segment. |
| 129 | * |
| 130 | * Walks the BPRS chain starting at @blockno, loading each data block |
| 131 | * into guest memory at @address. |
| 132 | * |
| 133 | * Returns: length of the segment on success, |
| 134 | * negative value on error. |
| 135 | */ |
| 136 | int zipl_load_segment(block_number_t blockno, uint64_t address); |
| 137 | |
| 138 | #define ZIPL_MAGIC "zIPL" |
| 139 | #define ZIPL_MAGIC_EBCDIC "\xa9\xc9\xd7\xd3" |
| 140 | #define IPL1_MAGIC "\xc9\xd7\xd3\xf1" /* == "IPL1" in EBCDIC */ |
| 141 | #define IPL2_MAGIC "\xc9\xd7\xd3\xf2" /* == "IPL2" in EBCDIC */ |
| 142 | #define VOL1_MAGIC "\xe5\xd6\xd3\xf1" /* == "VOL1" in EBCDIC */ |
| 143 | #define LNX1_MAGIC "\xd3\xd5\xe7\xf1" /* == "LNX1" in EBCDIC */ |
| 144 | #define CMS1_MAGIC "\xc3\xd4\xe2\xf1" /* == "CMS1" in EBCDIC */ |
| 145 | |
| 146 | #define LDL1_VERSION '\x40' /* == ' ' in EBCDIC */ |
| 147 | #define LDL2_VERSION '\xf2' /* == '2' in EBCDIC */ |
| 148 | |
| 149 | #define ZIPL_COMP_HEADER_IPL 0x00 |
| 150 | #define ZIPL_COMP_HEADER_DUMP 0x01 |
| 151 | |
| 152 | #define ZIPL_COMP_ENTRY_EXEC 0x01 |
| 153 | #define ZIPL_COMP_ENTRY_LOAD 0x02 |
| 154 | #define ZIPL_COMP_ENTRY_SIGNATURE 0x03 |
| 155 | |
| 156 | typedef struct XEckdMbr { |
| 157 | uint8_t magic[4]; /* == "xIPL" */ |
| 158 | uint8_t version; |
| 159 | uint8_t bp_type; |
| 160 | uint8_t dev_type; /* == DEV_TYPE_* */ |
| 161 | #define DEV_TYPE_ECKD 0x00 |
| 162 | #define DEV_TYPE_FBA 0x01 |
| 163 | uint8_t flags; |
| 164 | BootMapPointer blockptr; |
| 165 | uint8_t reserved[8]; |
| 166 | } __attribute__ ((packed)) XEckdMbr; /* see also BootInfo */ |
| 167 | |
| 168 | typedef struct BootMapScriptEntry { |
| 169 | BootMapPointer blkptr; |
| 170 | uint8_t pad[7]; |
| 171 | uint8_t type; /* == BOOT_SCRIPT_* */ |
| 172 | #define BOOT_SCRIPT_EXEC 0x01 |
| 173 | #define BOOT_SCRIPT_LOAD 0x02 |
| 174 | #define BOOT_SCRIPT_SIGNATURE 0x03 |
| 175 | union { |
| 176 | uint64_t load_address; |
| 177 | uint64_t load_psw; |
| 178 | } address; |
| 179 | } __attribute__ ((packed)) BootMapScriptEntry; |
| 180 | |
| 181 | typedef struct BootMapScriptHeader { |
| 182 | uint32_t magic; |
| 183 | uint8_t type; |
| 184 | #define BOOT_SCRIPT_HDR_IPL 0x00 |
| 185 | uint8_t reserved[27]; |
| 186 | } __attribute__ ((packed)) BootMapScriptHeader; |
| 187 | |
| 188 | typedef struct BootMapScript { |
| 189 | BootMapScriptHeader header; |
| 190 | BootMapScriptEntry entry[]; |
| 191 | } __attribute__ ((packed)) BootMapScript; |
| 192 | |
| 193 | /* |
| 194 | * These aren't real VTOCs, but referred to this way in some docs. |
| 195 | * They are "volume labels" actually. |
| 196 | * |
| 197 | * Some structures looks similar to described above, but left |
| 198 | * separate as there is no indication that they are the same. |
| 199 | * So, the value definitions are left separate too. |
| 200 | */ |
| 201 | typedef struct LDL_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */ |
| 202 | char magic[4]; /* "LNX1", EBCDIC */ |
| 203 | char volser[6]; /* volser, EBCDIC */ |
| 204 | uint8_t reserved[69]; /* reserved, 0x40 */ |
| 205 | uint8_t LDL_version; /* 0x40 or 0xF2 */ |
| 206 | uint64_t formatted_blocks; /* if LDL_version >= 0xF2 */ |
| 207 | } __attribute__ ((packed)) LDL_VTOC; |
| 208 | |
| 209 | typedef struct format_date { |
| 210 | uint8_t YY; |
| 211 | uint8_t MM; |
| 212 | uint8_t DD; |
| 213 | uint8_t hh; |
| 214 | uint8_t mm; |
| 215 | uint8_t ss; |
| 216 | } __attribute__ ((packed)) format_date_t; |
| 217 | |
| 218 | typedef struct CMS_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */ |
| 219 | /* @ blk.1 (zero based) for FBA */ |
| 220 | char magic[4]; /* 'CMS1', EBCDIC */ |
| 221 | char volser[6]; /* volser, EBCDIC */ |
| 222 | uint16_t version; /* = 0 */ |
| 223 | uint32_t block_size; /* = 512, 1024, 2048, or 4096 */ |
| 224 | uint32_t disk_origin; /* = 4 or 5 */ |
| 225 | uint32_t blocks; /* Number of usable cyls/blocks */ |
| 226 | uint32_t formatted; /* Max number of fmtd cyls/blks */ |
| 227 | uint32_t CMS_blocks; /* disk size in CMS blocks */ |
| 228 | uint32_t CMS_used; /* Number of CMS blocks in use */ |
| 229 | uint32_t FST_size; /* = 64, bytes */ |
| 230 | uint32_t FST_per_CMS_blk; /* */ |
| 231 | format_date_t format_date; /* YYMMDDhhmmss as 6 bytes */ |
| 232 | uint8_t reserved1[2]; /* = 0 */ |
| 233 | uint32_t offset; /* disk offset when reserved */ |
| 234 | uint32_t next_hole; /* block nr */ |
| 235 | uint32_t HBLK_hole_offset; /* >> HBLK data of next hole */ |
| 236 | uint32_t alloc_map_usr_off; /* >> user part of Alloc map */ |
| 237 | uint8_t reserved2[4]; /* = 0 */ |
| 238 | char shared_seg_name[8]; /* */ |
| 239 | } __attribute__ ((packed)) CMS_VTOC; |
| 240 | |
| 241 | /* from zipl/include/boot.h */ |
| 242 | typedef struct BootInfoBpIpl { |
| 243 | union { |
| 244 | ExtEckdBlockPtr eckd; |
| 245 | ScsiBlockPtr linr; |
| 246 | } bm_ptr; |
| 247 | uint8_t unused[16]; |
| 248 | } __attribute__ ((packed)) BootInfoBpIpl; |
| 249 | |
| 250 | typedef struct EckdDumpParam { |
| 251 | uint32_t start_blk; |
| 252 | uint32_t end_blk; |
| 253 | uint16_t blocksize; |
| 254 | uint8_t num_heads; |
| 255 | uint8_t bpt; |
| 256 | char reserved[4]; |
| 257 | } __attribute((packed, may_alias)) EckdDumpParam; |
| 258 | |
| 259 | typedef struct FbaDumpParam { |
| 260 | uint64_t start_blk; |
| 261 | uint64_t blockct; |
| 262 | } __attribute((packed)) FbaDumpParam; |
| 263 | |
| 264 | typedef struct BootInfoBpDump { |
| 265 | union { |
| 266 | EckdDumpParam eckd; |
| 267 | FbaDumpParam fba; |
| 268 | } param; |
| 269 | uint8_t unused[16]; |
| 270 | } __attribute__ ((packed)) BootInfoBpDump; |
| 271 | |
| 272 | typedef struct BootInfo { /* @ 0x70, record #0 */ |
| 273 | unsigned char magic[4]; /* = 'zIPL', ASCII */ |
| 274 | uint8_t version; /* = 1 */ |
| 275 | #define BOOT_INFO_VERSION 1 |
| 276 | uint8_t bp_type; /* = 0 */ |
| 277 | #define BOOT_INFO_BP_TYPE_IPL 0x00 |
| 278 | #define BOOT_INFO_BP_TYPE_DUMP 0x01 |
| 279 | uint8_t dev_type; /* = 0 */ |
| 280 | #define BOOT_INFO_DEV_TYPE_ECKD 0x00 |
| 281 | #define BOOT_INFO_DEV_TYPE_FBA 0x01 |
| 282 | uint8_t flags; /* = 1 */ |
| 283 | #ifdef __s390x__ |
| 284 | #define BOOT_INFO_FLAGS_ARCH 0x01 |
| 285 | #else |
| 286 | #define BOOT_INFO_FLAGS_ARCH 0x00 |
| 287 | #endif |
| 288 | union { |
| 289 | BootInfoBpDump dump; |
| 290 | BootInfoBpIpl ipl; |
| 291 | } bp; |
| 292 | } __attribute__ ((packed)) BootInfo; /* see also XEckdMbr */ |
| 293 | |
| 294 | /* |
| 295 | * Structs for IPL |
| 296 | */ |
| 297 | #define STAGE2_BLK_CNT_MAX 24 /* Stage 1b can load up to 24 blocks */ |
| 298 | |
| 299 | typedef struct EckdCdlIpl1 { |
| 300 | uint8_t key[4]; /* == "IPL1" */ |
| 301 | uint8_t data[24]; |
| 302 | } __attribute__((packed)) EckdCdlIpl1; |
| 303 | |
| 304 | typedef struct EckdSeekArg { |
| 305 | uint16_t pad; |
| 306 | EckdCHS chs; |
| 307 | uint8_t pad2; |
| 308 | } __attribute__ ((packed)) EckdSeekArg; |
| 309 | |
| 310 | typedef struct EckdStage1b { |
| 311 | uint8_t reserved[32 * STAGE2_BLK_CNT_MAX]; |
| 312 | struct EckdSeekArg seek[STAGE2_BLK_CNT_MAX]; |
| 313 | uint8_t unused[64]; |
| 314 | } __attribute__ ((packed)) EckdStage1b; |
| 315 | |
| 316 | typedef struct EckdStage1 { |
| 317 | uint8_t reserved[72]; |
| 318 | struct EckdSeekArg seek[2]; |
| 319 | } __attribute__ ((packed)) EckdStage1; |
| 320 | |
| 321 | typedef struct EckdCdlIpl2 { |
| 322 | uint8_t key[4]; /* == "IPL2" */ |
| 323 | struct EckdStage1 stage1; |
| 324 | XEckdMbr mbr; |
| 325 | uint8_t reserved[24]; |
| 326 | } __attribute__((packed)) EckdCdlIpl2; |
| 327 | |
| 328 | typedef struct EckdLdlIpl1 { |
| 329 | uint8_t reserved[24]; |
| 330 | struct EckdStage1 stage1; |
| 331 | BootInfo bip; /* BootInfo is MBR for LDL */ |
| 332 | } __attribute__((packed)) EckdLdlIpl1; |
| 333 | |
| 334 | typedef struct IplVolumeLabel { |
| 335 | unsigned char key[4]; /* == "VOL1" */ |
| 336 | union { |
| 337 | unsigned char data[80]; |
| 338 | struct { |
| 339 | unsigned char key[4]; /* == "VOL1" */ |
| 340 | unsigned char volser[6]; |
| 341 | unsigned char reserved[64]; |
| 342 | EckdCHS br; /* Location of Boot Record for list-directed IPL */ |
| 343 | } f; |
| 344 | }; |
| 345 | } __attribute__((packed)) IplVolumeLabel; |
| 346 | |
| 347 | typedef enum { |
| 348 | ECKD_NO_IPL, |
| 349 | ECKD_CMS, |
| 350 | ECKD_LDL, |
| 351 | ECKD_LDL_UNLABELED, |
| 352 | } ECKD_IPL_mode_t; |
| 353 | |
| 354 | /* utility code below */ |
| 355 | |
| 356 | static inline void print_volser(const void *volser) |
| 357 | { |
| 358 | char ascii[8]; |
| 359 | |
| 360 | ebcdic_to_ascii((char *)volser, ascii, 6); |
| 361 | ascii[6] = '\0'; |
| 362 | printf("VOLSER=[%s]\n", ascii); |
| 363 | } |
| 364 | |
| 365 | static inline bool unused_space(const void *p, size_t size) |
| 366 | { |
| 367 | size_t i; |
| 368 | const unsigned char *m = p; |
| 369 | |
| 370 | for (i = 0; i < size; i++) { |
| 371 | if (m[i] != FREE_SPACE_FILLER) { |
| 372 | return false; |
| 373 | } |
| 374 | } |
| 375 | return true; |
| 376 | } |
| 377 | |
| 378 | static inline bool is_null_block_number(block_number_t x) |
| 379 | { |
| 380 | return x == NULL_BLOCK_NR; |
| 381 | } |
| 382 | |
| 383 | static inline void read_block(block_number_t blockno, |
| 384 | void *buffer, |
| 385 | const char *errmsg) |
| 386 | { |
| 387 | IPL_assert(virtio_read(blockno, buffer) == 0, errmsg); |
| 388 | } |
| 389 | |
| 390 | static inline bool block_size_ok(uint32_t block_size) |
| 391 | { |
| 392 | return block_size == virtio_get_block_size(); |
| 393 | } |
| 394 | |
| 395 | static inline bool magic_match(const void *data, const void *magic) |
| 396 | { |
| 397 | return *((uint32_t *)data) == *((uint32_t *)magic); |
| 398 | } |
| 399 | |
| 400 | static inline uint32_t iso_733_to_u32(uint64_t x) |
| 401 | { |
| 402 | return (uint32_t)x; |
| 403 | } |
| 404 | |
| 405 | #define ISO_SECTOR_SIZE 2048 |
| 406 | /* El Torito specifies boot image size in 512 byte blocks */ |
| 407 | #define ET_SECTOR_SHIFT 2 |
| 408 | |
| 409 | #define ISO_PRIMARY_VD_SECTOR 16 |
| 410 | |
| 411 | static inline int read_iso_boot_image(uint32_t block_offset, void *load_addr, |
| 412 | uint32_t blks_to_load) |
| 413 | { |
| 414 | if (virtio_read_many(block_offset, load_addr, blks_to_load)) { |
| 415 | puts("Failed to read boot image!"); |
| 416 | return -1; |
| 417 | } |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | #define ISO9660_MAX_DIR_DEPTH 8 |
| 422 | |
| 423 | typedef struct IsoDirHdr { |
| 424 | uint8_t dr_len; |
| 425 | uint8_t ear_len; |
| 426 | uint64_t ext_loc; |
| 427 | uint64_t data_len; |
| 428 | uint8_t recording_datetime[7]; |
| 429 | uint8_t file_flags; |
| 430 | uint8_t file_unit_size; |
| 431 | uint8_t gap_size; |
| 432 | uint32_t vol_seqnum; |
| 433 | uint8_t fileid_len; |
| 434 | } __attribute__((packed)) IsoDirHdr; |
| 435 | |
| 436 | typedef struct IsoVdElTorito { |
| 437 | uint8_t el_torito[32]; /* must contain el_torito_magic value */ |
| 438 | uint8_t unused0[32]; |
| 439 | uint32_t bc_offset; |
| 440 | uint8_t unused1[1974]; |
| 441 | } __attribute__((packed)) IsoVdElTorito; |
| 442 | |
| 443 | typedef struct IsoVdPrimary { |
| 444 | uint8_t unused1; |
| 445 | uint8_t sys_id[32]; |
| 446 | uint8_t vol_id[32]; |
| 447 | uint8_t unused2[8]; |
| 448 | uint64_t vol_space_size; |
| 449 | uint8_t unused3[32]; |
| 450 | uint32_t vol_set_size; |
| 451 | uint32_t vol_seqnum; |
| 452 | uint32_t log_block_size; |
| 453 | uint64_t path_table_size; |
| 454 | uint32_t l_path_table; |
| 455 | uint32_t opt_l_path_table; |
| 456 | uint32_t m_path_table; |
| 457 | uint32_t opt_m_path_table; |
| 458 | IsoDirHdr rootdir; |
| 459 | uint8_t root_null; |
| 460 | uint8_t reserved2[1858]; |
| 461 | } __attribute__((packed)) IsoVdPrimary; |
| 462 | |
| 463 | typedef struct IsoVolDesc { |
| 464 | uint8_t type; |
| 465 | uint8_t ident[5]; |
| 466 | uint8_t version; |
| 467 | union { |
| 468 | IsoVdElTorito boot; |
| 469 | IsoVdPrimary primary; |
| 470 | } vd; |
| 471 | } __attribute__((packed)) IsoVolDesc; |
| 472 | |
| 473 | #define VOL_DESC_TYPE_BOOT 0 |
| 474 | #define VOL_DESC_TYPE_PRIMARY 1 |
| 475 | #define VOL_DESC_TYPE_SUPPLEMENT 2 |
| 476 | #define VOL_DESC_TYPE_PARTITION 3 |
| 477 | #define VOL_DESC_TERMINATOR 255 |
| 478 | |
| 479 | typedef struct IsoBcValid { |
| 480 | uint8_t platform_id; |
| 481 | uint16_t reserved; |
| 482 | uint8_t id[24]; |
| 483 | uint16_t checksum; |
| 484 | uint8_t key[2]; |
| 485 | } __attribute__((packed)) IsoBcValid; |
| 486 | |
| 487 | typedef struct IsoBcSection { |
| 488 | uint8_t boot_type; |
| 489 | uint16_t load_segment; |
| 490 | uint8_t sys_type; |
| 491 | uint8_t unused; |
| 492 | uint16_t sector_count; |
| 493 | uint32_t load_rba; |
| 494 | uint8_t selection[20]; |
| 495 | } __attribute__((packed)) IsoBcSection; |
| 496 | |
| 497 | typedef struct IsoBcHdr { |
| 498 | uint8_t platform_id; |
| 499 | uint16_t sect_num; |
| 500 | uint8_t id[28]; |
| 501 | } __attribute__((packed)) IsoBcHdr; |
| 502 | |
| 503 | typedef struct IsoBcEntry { |
| 504 | uint8_t id; |
| 505 | union { |
| 506 | IsoBcValid valid; /* id == 0x01 */ |
| 507 | IsoBcSection sect; /* id == 0x88 || id == 0x0 */ |
| 508 | IsoBcHdr hdr; /* id == 0x90 || id == 0x91 */ |
| 509 | } body; |
| 510 | } __attribute__((packed)) IsoBcEntry; |
| 511 | |
| 512 | #define ISO_BC_ENTRY_PER_SECTOR (ISO_SECTOR_SIZE / sizeof(IsoBcEntry)) |
| 513 | #define ISO_BC_HDR_VALIDATION 0x01 |
| 514 | #define ISO_BC_BOOTABLE_SECTION 0x88 |
| 515 | #define ISO_BC_MAGIC_55 0x55 |
| 516 | #define ISO_BC_MAGIC_AA 0xaa |
| 517 | #define ISO_BC_PLATFORM_X86 0x0 |
| 518 | #define ISO_BC_PLATFORM_PPC 0x1 |
| 519 | #define ISO_BC_PLATFORM_MAC 0x2 |
| 520 | |
| 521 | static inline bool is_iso_bc_valid(IsoBcEntry *e) |
| 522 | { |
| 523 | IsoBcValid *v = &e->body.valid; |
| 524 | |
| 525 | if (e->id != ISO_BC_HDR_VALIDATION) { |
| 526 | return false; |
| 527 | } |
| 528 | |
| 529 | if (v->platform_id != ISO_BC_PLATFORM_X86 && |
| 530 | v->platform_id != ISO_BC_PLATFORM_PPC && |
| 531 | v->platform_id != ISO_BC_PLATFORM_MAC) { |
| 532 | return false; |
| 533 | } |
| 534 | |
| 535 | return v->key[0] == ISO_BC_MAGIC_55 && |
| 536 | v->key[1] == ISO_BC_MAGIC_AA && |
| 537 | v->reserved == 0x0; |
| 538 | } |
| 539 | |
| 540 | #endif /* _PC_BIOS_S390_CCW_BOOTMAP_H */ |