/*
 * Boot and dump related definitions
 *
 * Copyright IBM Corp. 2022
 *
 * s390-tools is free software; you can redistribute it and/or modify
 * it under the terms of the MIT license. See LICENSE for details.
 */
#ifndef BOOT_DEFS_H
#define BOOT_DEFS_H

#include <stdint.h>

#include "lib/zt_common.h"

/*
 * ECKD dump parameter
 */
struct eckd_dump_param {
	uint32_t blk_start;
	uint32_t blk_end;
	uint16_t blk_size;
	uint8_t num_heads;
	uint8_t bpt;
	char reserved[4];
} __packed;

/*
 * FBA dump parameter
 */
struct fba_dump_param {
	uint32_t	res1;
	uint32_t	blk_start;
	uint32_t	res2;
	uint32_t	blk_end;
} __packed;

/*
 * SCSI dump parameter
 */
struct scsi_dump_param {
	uint64_t block;
	uint64_t reserved;
} __packed;

/*
 * Layout of block pointer for linear devices
 * e.g. SCSI
 */
struct linear_blockptr {
	uint64_t blockno;
	uint16_t size;
	uint16_t blockct;
	uint8_t reserved[4];
} __packed;

/*
 * Layout of block pointer for cylinder/head/sector devices
 * e.g. ECKD
 */
struct eckd_blockptr {
	uint16_t cyl;
	uint16_t head;
	uint8_t sec;
	uint16_t size;
	uint8_t blockct;
	uint8_t reserved[8];
} __packed;

typedef enum {
	COMPONENT_EXECUTE = 0x01,
	COMPONENT_LOAD = 0x02,
	COMPONENT_SIGNATURE = 0x03
} component_type;

typedef enum {
	COMPONENT_HEADER_IPL = 0x00,
	COMPONENT_HEADER_DUMP = 0x01
} component_header_type;

struct component_header {
	uint8_t magic[4];
	uint8_t type;
	uint8_t reserved[27];
} __packed;

struct signature_header {
	uint8_t format;
	uint8_t reserved[3];
	uint32_t length;
} __packed;

typedef union {
	uint64_t load_address;
	uint64_t load_psw;
	struct signature_header sig_head;
} component_data;

struct component_entry {
	uint8_t data[23];
	uint8_t type;
	component_data compdat;
} __packed;

#endif /* BOOT_DEFS_H */