/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2008 RuggedCom, Inc.
 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
 */

/*
 * See also linux/fs/partitions/efi.h
 *
 * EFI GUID Partition Table
 * Per Intel EFI Specification v1.02
 * http://developer.intel.com/technology/efi/efi.htm
 */

#include "asm/types.h"
#include <stdint.h>

#ifndef _DISK_PART_EFI_H
#define _DISK_PART_EFI_H

/////This added by DG:
////
#include <sys/cdefs.h> //needed for __packed

typedef struct {
	u8 b[16];
} efi_guid_t __attribute__((aligned(8)));

#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)                                                              \
	{                                                                                                                  \
		{                                                                                                              \
			(a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, (b)&0xff, ((b) >> 8) & 0xff,        \
				(c)&0xff, ((c) >> 8) & 0xff, (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7)                            \
		}                                                                                                              \
	}

typedef uint16_t __le16;
typedef uint32_t __le32;
typedef uint64_t __le64;
typedef unsigned long lbaint_t;
////

#define MSDOS_MBR_SIGNATURE 0xAA55
#define MSDOS_MBR_BOOT_CODE_SIZE 440
#define EFI_PMBR_OSTYPE_EFI 0xEF
#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE

#define GPT_HEADER_SIGNATURE_UBOOT 0x5452415020494645ULL
#define GPT_HEADER_CHROMEOS_IGNORE 0x454d45524f4e4749ULL // 'IGNOREME'

#define GPT_HEADER_REVISION_V1 0x00010000
#define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
#define GPT_ENTRY_NUMBERS CONFIG_EFI_PARTITION_ENTRIES_NUMBERS
#define GPT_ENTRY_SIZE 128

#define PARTITION_SYSTEM_GUID EFI_GUID(0xC12A7328, 0xF81F, 0x11d2, 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
#define LEGACY_MBR_PARTITION_GUID EFI_GUID(0x024DEE41, 0x33E7, 0x11d3, 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
#define PARTITION_MSFT_RESERVED_GUID                                                                                   \
	EFI_GUID(0xE3C9E316, 0x0B5C, 0x4DB8, 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
#define PARTITION_BASIC_DATA_GUID EFI_GUID(0xEBD0A0A2, 0xB9E5, 0x4433, 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
#define PARTITION_LINUX_FILE_SYSTEM_DATA_GUID                                                                          \
	EFI_GUID(0x0FC63DAF, 0x8483, 0x4772, 0x8E, 0x79, 0x3D, 0x69, 0xD8, 0x47, 0x7D, 0xE4)
#define PARTITION_LINUX_RAID_GUID EFI_GUID(0xa19d880f, 0x05fc, 0x4d3b, 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
#define PARTITION_LINUX_SWAP_GUID EFI_GUID(0x0657fd6d, 0xa4ab, 0x43c4, 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
#define PARTITION_LINUX_LVM_GUID EFI_GUID(0xe6d6d379, 0xf507, 0x44c2, 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)

/* linux/include/efi.h */
typedef u16 efi_char16_t;

/* based on linux/include/genhd.h */
struct partition {
	u8 boot_ind;	   /* 0x80 - active */
	u8 head;		   /* starting head */
	u8 sector;		   /* starting sector */
	u8 cyl;			   /* starting cylinder */
	u8 sys_ind;		   /* What partition type */
	u8 end_head;	   /* end head */
	u8 end_sector;	   /* end sector */
	u8 end_cyl;		   /* end cylinder */
	__le32 start_sect; /* starting sector counting from 0 */
	__le32 nr_sects;   /* nr of sectors in partition */
} __packed;

/* based on linux/fs/partitions/efi.h */
typedef struct _gpt_header {
	__le64 signature;
	__le32 revision;
	__le32 header_size;
	__le32 header_crc32;
	__le32 reserved1;
	__le64 my_lba;
	__le64 alternate_lba;
	__le64 first_usable_lba;
	__le64 last_usable_lba;
	efi_guid_t disk_guid;
	__le64 partition_entry_lba;
	__le32 num_partition_entries;
	__le32 sizeof_partition_entry;
	__le32 partition_entry_array_crc32;
} __packed gpt_header;

typedef union _gpt_entry_attributes {
	struct {
		u64 required_to_function : 1;
		u64 no_block_io_protocol : 1;
		u64 legacy_bios_bootable : 1;
		u64 reserved : 45;
		u64 type_guid_specific : 16;
	} fields;
	unsigned long long raw;
} __packed gpt_entry_attributes;

#define PARTNAME_SZ (72 / sizeof(efi_char16_t))
typedef struct _gpt_entry {
	efi_guid_t partition_type_guid;
	efi_guid_t unique_partition_guid;
	__le64 starting_lba;
	__le64 ending_lba;
	gpt_entry_attributes attributes;
	efi_char16_t partition_name[PARTNAME_SZ];
} __packed gpt_entry;

typedef struct _legacy_mbr {
	u8 boot_code[MSDOS_MBR_BOOT_CODE_SIZE];
	__le32 unique_mbr_signature;
	__le16 unknown;
	struct partition partition_record[4];
	__le16 signature;
} __packed legacy_mbr;

#endif /* _DISK_PART_EFI_H */
