2 * QEMU S390 bootmap interpreter -- declarations
4 * Copyright 2014 IBM Corp.
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
11 #ifndef _PC_BIOS_S390_CCW_BOOTMAP_H
12 #define _PC_BIOS_S390_CCW_BOOTMAP_H
17 typedef uint64_t block_number_t;
18 #define NULL_BLOCK_NR 0xffffffffffffffffULL
20 #define FREE_SPACE_FILLER '\xAA'
22 typedef struct ScsiBlockPtr {
27 } __attribute__ ((packed)) ScsiBlockPtr;
29 typedef struct FbaBlockPtr {
33 } __attribute__ ((packed)) FbaBlockPtr;
35 typedef struct EckdCHS {
39 } __attribute__ ((packed)) EckdCHS;
41 typedef struct EckdBlockPtr {
42 EckdCHS chs; /* cylinder/head/sector is an address of the block */
44 uint8_t count; /* (size_in_blocks-1);
45 * it's 0 for TablePtr, ScriptPtr, and SectionPtr */
46 } __attribute__ ((packed)) EckdBlockPtr;
48 typedef struct ExtEckdBlockPtr {
51 } __attribute__ ((packed)) ExtEckdBlockPtr;
53 typedef union BootMapPointer {
57 ExtEckdBlockPtr xeckd;
58 } __attribute__ ((packed)) BootMapPointer;
60 /* aka Program Table */
61 typedef struct BootMapTable {
64 BootMapPointer entry[];
65 } __attribute__ ((packed)) BootMapTable;
67 typedef struct ComponentEntry {
70 uint8_t component_type;
71 uint64_t load_address;
72 } __attribute((packed)) ComponentEntry;
74 typedef struct ComponentHeader {
75 uint8_t magic[4]; /* == "zIPL" */
76 uint8_t type; /* == ZIPL_COMP_HEADER_* */
78 } __attribute((packed)) ComponentHeader;
80 typedef struct ScsiMbr {
84 ScsiBlockPtr pt; /* block pointer to program table */
85 } __attribute__ ((packed)) ScsiMbr;
87 #define ZIPL_MAGIC "zIPL"
88 #define ZIPL_MAGIC_EBCDIC "\xa9\xc9\xd7\xd3"
89 #define IPL1_MAGIC "\xc9\xd7\xd3\xf1" /* == "IPL1" in EBCDIC */
90 #define IPL2_MAGIC "\xc9\xd7\xd3\xf2" /* == "IPL2" in EBCDIC */
91 #define VOL1_MAGIC "\xe5\xd6\xd3\xf1" /* == "VOL1" in EBCDIC */
92 #define LNX1_MAGIC "\xd3\xd5\xe7\xf1" /* == "LNX1" in EBCDIC */
93 #define CMS1_MAGIC "\xc3\xd4\xe2\xf1" /* == "CMS1" in EBCDIC */
95 #define LDL1_VERSION '\x40' /* == ' ' in EBCDIC */
96 #define LDL2_VERSION '\xf2' /* == '2' in EBCDIC */
98 #define ZIPL_COMP_HEADER_IPL 0x00
99 #define ZIPL_COMP_HEADER_DUMP 0x01
101 #define ZIPL_COMP_ENTRY_LOAD 0x02
102 #define ZIPL_COMP_ENTRY_EXEC 0x01
104 typedef struct XEckdMbr {
105 uint8_t magic[4]; /* == "xIPL" */
108 uint8_t dev_type; /* == DEV_TYPE_* */
109 #define DEV_TYPE_ECKD 0x00
110 #define DEV_TYPE_FBA 0x01
112 BootMapPointer blockptr;
114 } __attribute__ ((packed)) XEckdMbr; /* see also BootInfo */
116 typedef struct BootMapScriptEntry {
117 BootMapPointer blkptr;
119 uint8_t type; /* == BOOT_SCRIPT_* */
120 #define BOOT_SCRIPT_EXEC 0x01
121 #define BOOT_SCRIPT_LOAD 0x02
123 uint64_t load_address;
126 } __attribute__ ((packed)) BootMapScriptEntry;
128 typedef struct BootMapScriptHeader {
131 #define BOOT_SCRIPT_HDR_IPL 0x00
132 uint8_t reserved[27];
133 } __attribute__ ((packed)) BootMapScriptHeader;
135 typedef struct BootMapScript {
136 BootMapScriptHeader header;
137 BootMapScriptEntry entry[0];
138 } __attribute__ ((packed)) BootMapScript;
141 * These aren't real VTOCs, but referred to this way in some docs.
142 * They are "volume labels" actually.
144 * Some structures looks similar to described above, but left
145 * separate as there is no indication that they are the same.
146 * So, the value definitions are left separate too.
148 typedef struct LDL_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */
149 char magic[4]; /* "LNX1", EBCDIC */
150 char volser[6]; /* volser, EBCDIC */
151 uint8_t reserved[69]; /* reserved, 0x40 */
152 uint8_t LDL_version; /* 0x40 or 0xF2 */
153 uint64_t formatted_blocks; /* if LDL_version >= 0xF2 */
154 } __attribute__ ((packed)) LDL_VTOC;
156 typedef struct format_date {
163 } __attribute__ ((packed)) format_date_t;
165 typedef struct CMS_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */
166 /* @ blk.1 (zero based) for FBA */
167 char magic[4]; /* 'CMS1', EBCDIC */
168 char volser[6]; /* volser, EBCDIC */
169 uint16_t version; /* = 0 */
170 uint32_t block_size; /* = 512, 1024, 2048, or 4096 */
171 uint32_t disk_origin; /* = 4 or 5 */
172 uint32_t blocks; /* Number of usable cyls/blocks */
173 uint32_t formatted; /* Max number of fmtd cyls/blks */
174 uint32_t CMS_blocks; /* disk size in CMS blocks */
175 uint32_t CMS_used; /* Number of CMS blocks in use */
176 uint32_t FST_size; /* = 64, bytes */
177 uint32_t FST_per_CMS_blk; /* */
178 format_date_t format_date; /* YYMMDDhhmmss as 6 bytes */
179 uint8_t reserved1[2]; /* = 0 */
180 uint32_t offset; /* disk offset when reserved */
181 uint32_t next_hole; /* block nr */
182 uint32_t HBLK_hole_offset; /* >> HBLK data of next hole */
183 uint32_t alloc_map_usr_off; /* >> user part of Alloc map */
184 uint8_t reserved2[4]; /* = 0 */
185 char shared_seg_name[8]; /* */
186 } __attribute__ ((packed)) CMS_VTOC;
188 /* from zipl/include/boot.h */
189 typedef struct BootInfoBpIpl {
191 ExtEckdBlockPtr eckd;
195 } __attribute__ ((packed)) BootInfoBpIpl;
197 typedef struct EckdDumpParam {
204 } __attribute((packed, may_alias)) EckdDumpParam;
206 typedef struct FbaDumpParam {
209 } __attribute((packed)) FbaDumpParam;
211 typedef struct BootInfoBpDump {
217 } __attribute__ ((packed)) BootInfoBpDump;
219 typedef struct BootInfo { /* @ 0x70, record #0 */
220 unsigned char magic[4]; /* = 'zIPL', ASCII */
221 uint8_t version; /* = 1 */
222 #define BOOT_INFO_VERSION 1
223 uint8_t bp_type; /* = 0 */
224 #define BOOT_INFO_BP_TYPE_IPL 0x00
225 #define BOOT_INFO_BP_TYPE_DUMP 0x01
226 uint8_t dev_type; /* = 0 */
227 #define BOOT_INFO_DEV_TYPE_ECKD 0x00
228 #define BOOT_INFO_DEV_TYPE_FBA 0x01
229 uint8_t flags; /* = 1 */
231 #define BOOT_INFO_FLAGS_ARCH 0x01
233 #define BOOT_INFO_FLAGS_ARCH 0x00
239 } __attribute__ ((packed)) BootInfo; /* see also XEckdMbr */
244 #define STAGE2_BLK_CNT_MAX 24 /* Stage 1b can load up to 24 blocks */
246 typedef struct EckdCdlIpl1 {
247 uint8_t key[4]; /* == "IPL1" */
249 } __attribute__((packed)) EckdCdlIpl1;
251 typedef struct EckdSeekArg {
255 } __attribute__ ((packed)) EckdSeekArg;
257 typedef struct EckdStage1b {
258 uint8_t reserved[32 * STAGE2_BLK_CNT_MAX];
259 struct EckdSeekArg seek[STAGE2_BLK_CNT_MAX];
261 } __attribute__ ((packed)) EckdStage1b;
263 typedef struct EckdStage1 {
264 uint8_t reserved[72];
265 struct EckdSeekArg seek[2];
266 } __attribute__ ((packed)) EckdStage1;
268 typedef struct EckdCdlIpl2 {
269 uint8_t key[4]; /* == "IPL2" */
270 struct EckdStage1 stage1;
272 uint8_t reserved[24];
273 } __attribute__((packed)) EckdCdlIpl2;
275 typedef struct EckdLdlIpl1 {
276 uint8_t reserved[24];
277 struct EckdStage1 stage1;
278 BootInfo bip; /* BootInfo is MBR for LDL */
279 } __attribute__((packed)) EckdLdlIpl1;
281 typedef struct IplVolumeLabel {
282 unsigned char key[4]; /* == "VOL1" */
284 unsigned char data[80];
286 unsigned char key[4]; /* == "VOL1" */
287 unsigned char volser[6];
288 unsigned char reserved[6];
291 } __attribute__((packed)) IplVolumeLabel;
300 /* utility code below */
302 static inline void print_volser(const void *volser)
306 ebcdic_to_ascii((char *)volser, ascii, 6);
308 sclp_print("VOLSER=[");
313 static inline bool unused_space(const void *p, size_t size)
316 const unsigned char *m = p;
318 for (i = 0; i < size; i++) {
319 if (m[i] != FREE_SPACE_FILLER) {
326 static inline bool is_null_block_number(block_number_t x)
328 return x == NULL_BLOCK_NR;
331 static inline void read_block(block_number_t blockno,
335 IPL_assert(virtio_read(blockno, buffer) == 0, errmsg);
338 static inline bool block_size_ok(uint32_t block_size)
340 return block_size == virtio_get_block_size();
343 static inline bool magic_match(const void *data, const void *magic)
345 return *((uint32_t *)data) == *((uint32_t *)magic);
348 static inline uint32_t iso_733_to_u32(uint64_t x)
353 #define ISO_SECTOR_SIZE 2048
354 /* El Torito specifies boot image size in 512 byte blocks */
355 #define ET_SECTOR_SHIFT 2
357 #define ISO_PRIMARY_VD_SECTOR 16
359 static inline void read_iso_sector(uint32_t block_offset, void *buf,
362 IPL_assert(virtio_read_many(block_offset, buf, 1) == 0, errmsg);
365 static inline void read_iso_boot_image(uint32_t block_offset, void *load_addr,
366 uint32_t blks_to_load)
368 IPL_assert(virtio_read_many(block_offset, load_addr, blks_to_load) == 0,
369 "Failed to read boot image!");
372 #define ISO9660_MAX_DIR_DEPTH 8
374 typedef struct IsoDirHdr {
379 uint8_t recording_datetime[7];
381 uint8_t file_unit_size;
385 } __attribute__((packed)) IsoDirHdr;
387 typedef struct IsoVdElTorito {
388 uint8_t el_torito[32]; /* must contain el_torito_magic value */
391 uint8_t unused1[1974];
392 } __attribute__((packed)) IsoVdElTorito;
394 typedef struct IsoVdPrimary {
399 uint64_t vol_space_size;
401 uint32_t vol_set_size;
403 uint32_t log_block_size;
404 uint64_t path_table_size;
405 uint32_t l_path_table;
406 uint32_t opt_l_path_table;
407 uint32_t m_path_table;
408 uint32_t opt_m_path_table;
411 uint8_t reserved2[1858];
412 } __attribute__((packed)) IsoVdPrimary;
414 typedef struct IsoVolDesc {
420 IsoVdPrimary primary;
422 } __attribute__((packed)) IsoVolDesc;
424 #define VOL_DESC_TYPE_BOOT 0
425 #define VOL_DESC_TYPE_PRIMARY 1
426 #define VOL_DESC_TYPE_SUPPLEMENT 2
427 #define VOL_DESC_TYPE_PARTITION 3
428 #define VOL_DESC_TERMINATOR 255
430 typedef struct IsoBcValid {
436 } __attribute__((packed)) IsoBcValid;
438 typedef struct IsoBcSection {
440 uint16_t load_segment;
443 uint16_t sector_count;
445 uint8_t selection[20];
446 } __attribute__((packed)) IsoBcSection;
448 typedef struct IsoBcHdr {
452 } __attribute__((packed)) IsoBcHdr;
454 typedef struct IsoBcEntry {
457 IsoBcValid valid; /* id == 0x01 */
458 IsoBcSection sect; /* id == 0x88 || id == 0x0 */
459 IsoBcHdr hdr; /* id == 0x90 || id == 0x91 */
461 } __attribute__((packed)) IsoBcEntry;
463 #define ISO_BC_ENTRY_PER_SECTOR (ISO_SECTOR_SIZE / sizeof(IsoBcEntry))
464 #define ISO_BC_HDR_VALIDATION 0x01
465 #define ISO_BC_BOOTABLE_SECTION 0x88
466 #define ISO_BC_MAGIC_55 0x55
467 #define ISO_BC_MAGIC_AA 0xaa
468 #define ISO_BC_PLATFORM_X86 0x0
469 #define ISO_BC_PLATFORM_PPC 0x1
470 #define ISO_BC_PLATFORM_MAC 0x2
472 static inline bool is_iso_bc_valid(IsoBcEntry *e)
474 IsoBcValid *v = &e->body.valid;
476 if (e->id != ISO_BC_HDR_VALIDATION) {
480 if (v->platform_id != ISO_BC_PLATFORM_X86 &&
481 v->platform_id != ISO_BC_PLATFORM_PPC &&
482 v->platform_id != ISO_BC_PLATFORM_MAC) {
486 return v->key[0] == ISO_BC_MAGIC_55 &&
487 v->key[1] == ISO_BC_MAGIC_AA &&
491 #endif /* _PC_BIOS_S390_CCW_BOOTMAP_H */