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https://github.com/ibm-s390-linux/s390-tools.git
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ba7bf2f6d3
To reduce duplication of definitions and facilitate reuse between zipl and zgetdump. Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com> Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
172 lines
3.1 KiB
C
172 lines
3.1 KiB
C
/*
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* Boot and dump related definitions
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*
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* Copyright IBM Corp. 2022
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef BOOT_DEFS_H
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#define BOOT_DEFS_H
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#include <stdint.h>
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#include "lib/zt_common.h"
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/*
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* ECKD dump parameter
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*/
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struct eckd_dump_param {
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uint32_t blk_start;
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uint32_t blk_end;
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uint16_t blk_size;
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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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} __packed;
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/*
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* FBA dump parameter
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*/
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struct fba_dump_param {
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uint32_t res1;
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uint32_t blk_start;
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uint32_t res2;
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uint32_t blk_end;
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} __packed;
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/*
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* SCSI dump parameter
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*/
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struct scsi_dump_param {
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uint64_t block;
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uint64_t reserved;
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} __packed;
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/*
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* Layout of block pointer for linear devices
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* e.g. SCSI
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*/
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struct linear_blockptr {
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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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} __packed;
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/*
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* Layout of block pointer for cylinder/head/sector devices
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* e.g. ECKD
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*/
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struct eckd_blockptr {
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uint16_t cyl;
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uint16_t head;
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uint8_t sec;
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uint16_t size;
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uint8_t blockct;
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uint8_t reserved[8];
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} __packed;
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typedef enum {
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COMPONENT_EXECUTE = 0x01,
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COMPONENT_LOAD = 0x02,
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COMPONENT_SIGNATURE = 0x03
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} component_type;
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typedef enum {
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COMPONENT_HEADER_IPL = 0x00,
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COMPONENT_HEADER_DUMP = 0x01
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} component_header_type;
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struct component_header {
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uint8_t magic[4];
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uint8_t type;
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uint8_t reserved[27];
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} __packed;
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struct signature_header {
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uint8_t format;
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uint8_t reserved[3];
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uint32_t length;
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} __packed;
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typedef union {
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uint64_t load_address;
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uint64_t load_psw;
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struct signature_header sig_head;
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} component_data;
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struct component_entry {
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uint8_t data[23];
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uint8_t type;
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component_data compdat;
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} __packed;
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/* SCSI dump super block */
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struct scsi_dump_sb {
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uint64_t magic;
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uint64_t version;
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uint64_t part_start;
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uint64_t part_size;
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uint64_t dump_offset;
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uint64_t dump_size;
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uint64_t csum_offset;
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uint64_t csum_size;
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uint64_t csum;
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} __packed;
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#define SCSI_DUMP_SB_MAGIC 0x5a46435044554d50ULL /* ZFCPDUMP */
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/* To avoid a csum entry of 0 a seed is used */
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#define SCSI_DUMP_SB_SEED 0x12345678
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#define SCSI_DUMP_SB_CSUM_SIZE 4096
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/* Boot info */
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#define BOOT_INFO_VERSION 1
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#define BOOT_INFO_MAGIC "zIPL"
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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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#define BOOT_INFO_DEV_TYPE_SCSI 0x02
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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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#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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struct boot_info_bp_dump {
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union {
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struct eckd_dump_param eckd;
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struct fba_dump_param fba;
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struct scsi_dump_param scsi;
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} param;
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uint8_t unused[16];
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} __packed;
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struct boot_info_bp_ipl {
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union {
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struct eckd_blockptr eckd;
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struct linear_blockptr lin;
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} bm_ptr;
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uint8_t unused[16];
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} __packed;
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struct boot_info {
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char magic[4];
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uint8_t version;
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uint8_t bp_type;
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uint8_t dev_type;
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uint8_t flags;
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union {
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struct boot_info_bp_dump dump;
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struct boot_info_bp_ipl ipl;
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} bp;
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} __packed;
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#endif /* BOOT_DEFS_H */
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