26f2bbd6b1
Add declarations to describe structure of different dasd IPL sources (eckd and fba). Move the structure definitions to a new header bootmap.h. While we are at it, change structs to typedefs. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
255 lines
8.1 KiB
C
255 lines
8.1 KiB
C
/*
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* QEMU S390 bootmap interpreter -- declarations
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*
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* Copyright 2014 IBM Corp.
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* Author(s): Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef _PC_BIOS_S390_CCW_BOOTMAP_H
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#define _PC_BIOS_S390_CCW_BOOTMAP_H
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#include "s390-ccw.h"
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#define FREE_SPACE_FILLER '\xAA'
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typedef struct ScsiBlockPtr {
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uint64_t blockno;
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uint16_t size;
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uint16_t blockct;
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uint8_t reserved[4];
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} __attribute__ ((packed)) ScsiBlockPtr;
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typedef struct FbaBlockPtr {
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uint32_t blockno;
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uint16_t size;
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uint16_t blockct;
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} __attribute__ ((packed)) FbaBlockPtr;
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typedef struct EckdBlockPtr {
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uint16_t cylinder; /* cylinder/head/sector is an address of the block */
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uint16_t head;
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uint8_t sector;
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uint16_t size;
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uint8_t count; /* (size_in_blocks-1);
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* it's 0 for TablePtr, ScriptPtr, and SectionPtr */
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} __attribute__ ((packed)) EckdBlockPtr;
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typedef struct ExtEckdBlockPtr {
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EckdBlockPtr bptr;
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uint8_t reserved[8];
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} __attribute__ ((packed)) ExtEckdBlockPtr;
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typedef union BootMapPointer {
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ScsiBlockPtr scsi;
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FbaBlockPtr fba;
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EckdBlockPtr eckd;
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ExtEckdBlockPtr xeckd;
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} __attribute__ ((packed)) BootMapPointer;
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typedef struct ComponentEntry {
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ScsiBlockPtr data;
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uint8_t pad[7];
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uint8_t component_type;
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uint64_t load_address;
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} __attribute((packed)) ComponentEntry;
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typedef struct ComponentHeader {
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uint8_t magic[4]; /* == "zIPL" */
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uint8_t type; /* == ZIPL_COMP_HEADER_* */
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uint8_t reserved[27];
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} __attribute((packed)) ComponentHeader;
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typedef struct ScsiMbr {
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uint8_t magic[4];
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uint32_t version_id;
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uint8_t reserved[8];
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ScsiBlockPtr blockptr;
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} __attribute__ ((packed)) ScsiMbr;
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#define ZIPL_MAGIC "zIPL"
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#define IPL1_MAGIC "\xc9\xd7\xd3\xf1" /* == "IPL1" in EBCDIC */
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#define IPL2_MAGIC "\xc9\xd7\xd3\xf2" /* == "IPL2" in EBCDIC */
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#define VOL1_MAGIC "\xe5\xd6\xd3\xf1" /* == "VOL1" in EBCDIC */
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#define LNX1_MAGIC "\xd3\xd5\xe7\xf1" /* == "LNX1" in EBCDIC */
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#define CMS1_MAGIC "\xc3\xd4\xe2\xf1" /* == "CMS1" in EBCDIC */
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#define LDL1_VERSION '\x40' /* == ' ' in EBCDIC */
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#define LDL2_VERSION '\xf2' /* == '2' in EBCDIC */
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#define ZIPL_COMP_HEADER_IPL 0x00
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#define ZIPL_COMP_HEADER_DUMP 0x01
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#define ZIPL_COMP_ENTRY_LOAD 0x02
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#define ZIPL_COMP_ENTRY_EXEC 0x01
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typedef struct XEckdMbr {
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uint8_t magic[4]; /* == "xIPL" */
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uint8_t version;
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uint8_t bp_type;
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uint8_t dev_type; /* == DEV_TYPE_* */
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#define DEV_TYPE_ECKD 0x00
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#define DEV_TYPE_FBA 0x01
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uint8_t flags;
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BootMapPointer blockptr;
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uint8_t reserved[8];
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} __attribute__ ((packed)) XEckdMbr; /* see also BootInfo */
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typedef struct BootMapScriptEntry {
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BootMapPointer blkptr;
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uint8_t pad[7];
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uint8_t type; /* == BOOT_SCRIPT_* */
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#define BOOT_SCRIPT_EXEC 0x01
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#define BOOT_SCRIPT_LOAD 0x02
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union {
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uint64_t load_address;
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uint64_t load_psw;
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} address;
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} __attribute__ ((packed)) BootMapScriptEntry;
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typedef struct BootMapScriptHeader {
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uint32_t magic;
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uint8_t type;
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#define BOOT_SCRIPT_HDR_IPL 0x00
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uint8_t reserved[27];
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} __attribute__ ((packed)) BootMapScriptHeader;
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typedef struct BootMapScript {
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BootMapScriptHeader header;
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BootMapScriptEntry entry[0];
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} __attribute__ ((packed)) BootMapScript;
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/*
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* These aren't real VTOCs, but referred to this way in some docs.
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* They are "volume labels" actually.
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*
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* Some structures looks similar to described above, but left
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* separate as there is no indication that they are the same.
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* So, the value definitions are left separate too.
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*/
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typedef struct LDL_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */
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char magic[4]; /* "LNX1", EBCDIC */
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char volser[6]; /* volser, EBCDIC */
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uint8_t reserved[69]; /* reserved, 0x40 */
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uint8_t LDL_version; /* 0x40 or 0xF2 */
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uint64_t formatted_blocks; /* if LDL_version >= 0xF2 */
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} __attribute__ ((packed)) LDL_VTOC;
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typedef struct format_date {
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uint8_t YY;
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uint8_t MM;
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uint8_t DD;
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uint8_t hh;
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uint8_t mm;
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uint8_t ss;
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} __attribute__ ((packed)) format_date_t;
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typedef struct CMS_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */
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/* @ blk.1 (zero based) for FBA */
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char magic[4]; /* 'CMS1', EBCDIC */
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char volser[6]; /* volser, EBCDIC */
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uint16_t version; /* = 0 */
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uint32_t block_size; /* = 512, 1024, 2048, or 4096 */
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uint32_t disk_origin; /* = 4 or 5 */
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uint32_t blocks; /* Number of usable cyls/blocks */
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uint32_t formatted; /* Max number of fmtd cyls/blks */
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uint32_t CMS_blocks; /* disk size in CMS blocks */
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uint32_t CMS_used; /* Number of CMS blocks in use */
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uint32_t FST_size; /* = 64, bytes */
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uint32_t FST_per_CMS_blk; /* */
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format_date_t format_date; /* YYMMDDhhmmss as 6 bytes */
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uint8_t reserved1[2]; /* = 0 */
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uint32_t offset; /* disk offset when reserved */
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uint32_t next_hole; /* block nr */
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uint32_t HBLK_hole_offset; /* >> HBLK data of next hole */
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uint32_t alloc_map_usr_off; /* >> user part of Alloc map */
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uint8_t reserved2[4]; /* = 0 */
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char shared_seg_name[8]; /* */
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} __attribute__ ((packed)) CMS_VTOC;
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/* from zipl/include/boot.h */
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typedef struct BootInfoBpIpl {
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union {
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ExtEckdBlockPtr eckd;
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ScsiBlockPtr linr;
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} bm_ptr;
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uint8_t unused[16];
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} __attribute__ ((packed)) BootInfoBpIpl;
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typedef struct EckdDumpParam {
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uint32_t start_blk;
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uint32_t end_blk;
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uint16_t blocksize;
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uint8_t num_heads;
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uint8_t bpt;
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char reserved[4];
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} __attribute((packed, may_alias)) EckdDumpParam;
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typedef struct FbaDumpParam {
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uint64_t start_blk;
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uint64_t blockct;
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} __attribute((packed)) FbaDumpParam;
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typedef struct BootInfoBpDump {
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union {
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EckdDumpParam eckd;
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FbaDumpParam fba;
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} param;
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uint8_t unused[16];
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} __attribute__ ((packed)) BootInfoBpDump;
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typedef struct BootInfo { /* @ 0x70, record #0 */
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unsigned char magic[4]; /* = 'zIPL', ASCII */
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uint8_t version; /* = 1 */
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#define BOOT_INFO_VERSION 1
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uint8_t bp_type; /* = 0 */
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#define BOOT_INFO_BP_TYPE_IPL 0x00
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#define BOOT_INFO_BP_TYPE_DUMP 0x01
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uint8_t dev_type; /* = 0 */
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#define BOOT_INFO_DEV_TYPE_ECKD 0x00
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#define BOOT_INFO_DEV_TYPE_FBA 0x01
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uint8_t flags; /* = 1 */
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#ifdef __s390x__
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#define BOOT_INFO_FLAGS_ARCH 0x01
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#else
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#define BOOT_INFO_FLAGS_ARCH 0x00
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#endif
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union {
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BootInfoBpDump dump;
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BootInfoBpIpl ipl;
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} bp;
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} __attribute__ ((packed)) BootInfo; /* see also XEckdMbr */
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typedef struct Ipl1 {
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unsigned char key[4]; /* == "IPL1" */
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unsigned char data[24];
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} __attribute__((packed)) Ipl1;
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typedef struct Ipl2 {
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unsigned char key[4]; /* == "IPL2" */
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union {
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unsigned char data[144];
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struct {
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unsigned char reserved1[92-4];
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XEckdMbr mbr;
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unsigned char reserved2[144-(92-4)-sizeof(XEckdMbr)];
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} x;
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} u;
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} __attribute__((packed)) Ipl2;
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typedef struct IplVolumeLabel {
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unsigned char key[4]; /* == "VOL1" */
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union {
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unsigned char data[80];
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struct {
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unsigned char key[4]; /* == "VOL1" */
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unsigned char volser[6];
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unsigned char reserved[6];
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} f;
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};
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} __attribute__((packed)) IplVolumeLabel;
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#endif /* _PC_BIOS_S390_CCW_BOOTMAP_H */
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