494 lines
14 KiB
C
494 lines
14 KiB
C
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/*
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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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#include "virtio.h"
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typedef uint64_t block_number_t;
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#define NULL_BLOCK_NR 0xffffffffffffffffULL
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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 EckdCHS {
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uint16_t cylinder;
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uint16_t head;
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uint8_t sector;
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} __attribute__ ((packed)) EckdCHS;
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typedef struct EckdBlockPtr {
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EckdCHS chs; /* cylinder/head/sector is an address of the block */
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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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/* aka Program Table */
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typedef struct BootMapTable {
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uint8_t magic[4];
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uint8_t reserved[12];
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BootMapPointer entry[];
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} __attribute__ ((packed)) BootMapTable;
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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 pt; /* block pointer to program table */
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} __attribute__ ((packed)) ScsiMbr;
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#define ZIPL_MAGIC "zIPL"
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#define ZIPL_MAGIC_EBCDIC "\xa9\xc9\xd7\xd3"
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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_EXEC 0x01
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#define ZIPL_COMP_ENTRY_LOAD 0x02
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#define ZIPL_COMP_ENTRY_SIGNATURE 0x03
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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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#define BOOT_SCRIPT_SIGNATURE 0x03
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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[];
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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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/*
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* Structs for IPL
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*/
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#define STAGE2_BLK_CNT_MAX 24 /* Stage 1b can load up to 24 blocks */
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typedef struct EckdCdlIpl1 {
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uint8_t key[4]; /* == "IPL1" */
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uint8_t data[24];
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} __attribute__((packed)) EckdCdlIpl1;
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typedef struct EckdSeekArg {
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uint16_t pad;
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EckdCHS chs;
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uint8_t pad2;
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} __attribute__ ((packed)) EckdSeekArg;
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typedef struct EckdStage1b {
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uint8_t reserved[32 * STAGE2_BLK_CNT_MAX];
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struct EckdSeekArg seek[STAGE2_BLK_CNT_MAX];
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uint8_t unused[64];
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} __attribute__ ((packed)) EckdStage1b;
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typedef struct EckdStage1 {
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uint8_t reserved[72];
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struct EckdSeekArg seek[2];
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} __attribute__ ((packed)) EckdStage1;
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typedef struct EckdCdlIpl2 {
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uint8_t key[4]; /* == "IPL2" */
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struct EckdStage1 stage1;
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XEckdMbr mbr;
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uint8_t reserved[24];
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} __attribute__((packed)) EckdCdlIpl2;
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typedef struct EckdLdlIpl1 {
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uint8_t reserved[24];
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struct EckdStage1 stage1;
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BootInfo bip; /* BootInfo is MBR for LDL */
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} __attribute__((packed)) EckdLdlIpl1;
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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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typedef enum {
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ECKD_NO_IPL,
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ECKD_CMS,
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ECKD_LDL,
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ECKD_LDL_UNLABELED,
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} ECKD_IPL_mode_t;
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/* utility code below */
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static inline void print_volser(const void *volser)
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{
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char ascii[8];
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ebcdic_to_ascii((char *)volser, ascii, 6);
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ascii[6] = '\0';
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sclp_print("VOLSER=[");
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sclp_print(ascii);
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sclp_print("]\n");
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}
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static inline bool unused_space(const void *p, size_t size)
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{
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size_t i;
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const unsigned char *m = p;
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for (i = 0; i < size; i++) {
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if (m[i] != FREE_SPACE_FILLER) {
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return false;
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}
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}
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return true;
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}
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static inline bool is_null_block_number(block_number_t x)
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{
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return x == NULL_BLOCK_NR;
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}
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static inline void read_block(block_number_t blockno,
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void *buffer,
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const char *errmsg)
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{
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IPL_assert(virtio_read(blockno, buffer) == 0, errmsg);
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}
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static inline bool block_size_ok(uint32_t block_size)
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{
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return block_size == virtio_get_block_size();
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}
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static inline bool magic_match(const void *data, const void *magic)
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{
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return *((uint32_t *)data) == *((uint32_t *)magic);
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}
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static inline uint32_t iso_733_to_u32(uint64_t x)
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{
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return (uint32_t)x;
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}
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#define ISO_SECTOR_SIZE 2048
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/* El Torito specifies boot image size in 512 byte blocks */
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#define ET_SECTOR_SHIFT 2
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#define ISO_PRIMARY_VD_SECTOR 16
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static inline void read_iso_sector(uint32_t block_offset, void *buf,
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const char *errmsg)
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{
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||
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|
IPL_assert(virtio_read_many(block_offset, buf, 1) == 0, errmsg);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void read_iso_boot_image(uint32_t block_offset, void *load_addr,
|
||
|
|
uint32_t blks_to_load)
|
||
|
|
{
|
||
|
|
IPL_assert(virtio_read_many(block_offset, load_addr, blks_to_load) == 0,
|
||
|
|
"Failed to read boot image!");
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ISO9660_MAX_DIR_DEPTH 8
|
||
|
|
|
||
|
|
typedef struct IsoDirHdr {
|
||
|
|
uint8_t dr_len;
|
||
|
|
uint8_t ear_len;
|
||
|
|
uint64_t ext_loc;
|
||
|
|
uint64_t data_len;
|
||
|
|
uint8_t recording_datetime[7];
|
||
|
|
uint8_t file_flags;
|
||
|
|
uint8_t file_unit_size;
|
||
|
|
uint8_t gap_size;
|
||
|
|
uint32_t vol_seqnum;
|
||
|
|
uint8_t fileid_len;
|
||
|
|
} __attribute__((packed)) IsoDirHdr;
|
||
|
|
|
||
|
|
typedef struct IsoVdElTorito {
|
||
|
|
uint8_t el_torito[32]; /* must contain el_torito_magic value */
|
||
|
|
uint8_t unused0[32];
|
||
|
|
uint32_t bc_offset;
|
||
|
|
uint8_t unused1[1974];
|
||
|
|
} __attribute__((packed)) IsoVdElTorito;
|
||
|
|
|
||
|
|
typedef struct IsoVdPrimary {
|
||
|
|
uint8_t unused1;
|
||
|
|
uint8_t sys_id[32];
|
||
|
|
uint8_t vol_id[32];
|
||
|
|
uint8_t unused2[8];
|
||
|
|
uint64_t vol_space_size;
|
||
|
|
uint8_t unused3[32];
|
||
|
|
uint32_t vol_set_size;
|
||
|
|
uint32_t vol_seqnum;
|
||
|
|
uint32_t log_block_size;
|
||
|
|
uint64_t path_table_size;
|
||
|
|
uint32_t l_path_table;
|
||
|
|
uint32_t opt_l_path_table;
|
||
|
|
uint32_t m_path_table;
|
||
|
|
uint32_t opt_m_path_table;
|
||
|
|
IsoDirHdr rootdir;
|
||
|
|
uint8_t root_null;
|
||
|
|
uint8_t reserved2[1858];
|
||
|
|
} __attribute__((packed)) IsoVdPrimary;
|
||
|
|
|
||
|
|
typedef struct IsoVolDesc {
|
||
|
|
uint8_t type;
|
||
|
|
uint8_t ident[5];
|
||
|
|
uint8_t version;
|
||
|
|
union {
|
||
|
|
IsoVdElTorito boot;
|
||
|
|
IsoVdPrimary primary;
|
||
|
|
} vd;
|
||
|
|
} __attribute__((packed)) IsoVolDesc;
|
||
|
|
|
||
|
|
#define VOL_DESC_TYPE_BOOT 0
|
||
|
|
#define VOL_DESC_TYPE_PRIMARY 1
|
||
|
|
#define VOL_DESC_TYPE_SUPPLEMENT 2
|
||
|
|
#define VOL_DESC_TYPE_PARTITION 3
|
||
|
|
#define VOL_DESC_TERMINATOR 255
|
||
|
|
|
||
|
|
typedef struct IsoBcValid {
|
||
|
|
uint8_t platform_id;
|
||
|
|
uint16_t reserved;
|
||
|
|
uint8_t id[24];
|
||
|
|
uint16_t checksum;
|
||
|
|
uint8_t key[2];
|
||
|
|
} __attribute__((packed)) IsoBcValid;
|
||
|
|
|
||
|
|
typedef struct IsoBcSection {
|
||
|
|
uint8_t boot_type;
|
||
|
|
uint16_t load_segment;
|
||
|
|
uint8_t sys_type;
|
||
|
|
uint8_t unused;
|
||
|
|
uint16_t sector_count;
|
||
|
|
uint32_t load_rba;
|
||
|
|
uint8_t selection[20];
|
||
|
|
} __attribute__((packed)) IsoBcSection;
|
||
|
|
|
||
|
|
typedef struct IsoBcHdr {
|
||
|
|
uint8_t platform_id;
|
||
|
|
uint16_t sect_num;
|
||
|
|
uint8_t id[28];
|
||
|
|
} __attribute__((packed)) IsoBcHdr;
|
||
|
|
|
||
|
|
typedef struct IsoBcEntry {
|
||
|
|
uint8_t id;
|
||
|
|
union {
|
||
|
|
IsoBcValid valid; /* id == 0x01 */
|
||
|
|
IsoBcSection sect; /* id == 0x88 || id == 0x0 */
|
||
|
|
IsoBcHdr hdr; /* id == 0x90 || id == 0x91 */
|
||
|
|
} body;
|
||
|
|
} __attribute__((packed)) IsoBcEntry;
|
||
|
|
|
||
|
|
#define ISO_BC_ENTRY_PER_SECTOR (ISO_SECTOR_SIZE / sizeof(IsoBcEntry))
|
||
|
|
#define ISO_BC_HDR_VALIDATION 0x01
|
||
|
|
#define ISO_BC_BOOTABLE_SECTION 0x88
|
||
|
|
#define ISO_BC_MAGIC_55 0x55
|
||
|
|
#define ISO_BC_MAGIC_AA 0xaa
|
||
|
|
#define ISO_BC_PLATFORM_X86 0x0
|
||
|
|
#define ISO_BC_PLATFORM_PPC 0x1
|
||
|
|
#define ISO_BC_PLATFORM_MAC 0x2
|
||
|
|
|
||
|
|
static inline bool is_iso_bc_valid(IsoBcEntry *e)
|
||
|
|
{
|
||
|
|
IsoBcValid *v = &e->body.valid;
|
||
|
|
|
||
|
|
if (e->id != ISO_BC_HDR_VALIDATION) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (v->platform_id != ISO_BC_PLATFORM_X86 &&
|
||
|
|
v->platform_id != ISO_BC_PLATFORM_PPC &&
|
||
|
|
v->platform_id != ISO_BC_PLATFORM_MAC) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return v->key[0] == ISO_BC_MAGIC_55 &&
|
||
|
|
v->key[1] == ISO_BC_MAGIC_AA &&
|
||
|
|
v->reserved == 0x0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _PC_BIOS_S390_CCW_BOOTMAP_H */
|