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  • #ifndef _ASM_X86_BOOTPARAM_H
    #define _ASM_X86_BOOTPARAM_H
    
    #include <linux/types.h>
    #include <linux/screen_info.h>
    #include <linux/apm_bios.h>
    #include <linux/edd.h>
    #include <asm/e820.h>
    #include <asm/ist.h>
    #include <asm/video/edid.h>
    
    /* setup data types */
    #define SETUP_NONE			0
    #define SETUP_E820_EXT			1
    
    /* extensible setup data list node */
    struct setup_data {
    	__u64 next;
    	__u32 type;
    	__u32 len;
    	__u8 data[0];
    };
    
    struct setup_header {
    	__u8	setup_sects;
    	__u16	root_flags;
    	__u32	syssize;
    	__u16	ram_size;
    #define RAMDISK_IMAGE_START_MASK	0x07FF
    #define RAMDISK_PROMPT_FLAG		0x8000
    #define RAMDISK_LOAD_FLAG		0x4000
    	__u16	vid_mode;
    	__u16	root_dev;
    	__u16	boot_flag;
    	__u16	jump;
    	__u32	header;
    	__u16	version;
    	__u32	realmode_swtch;
    	__u16	start_sys;
    	__u16	kernel_version;
    	__u8	type_of_loader;
    	__u8	loadflags;
    #define LOADED_HIGH	(1<<0)
    #define QUIET_FLAG	(1<<5)
    #define KEEP_SEGMENTS	(1<<6)
    #define CAN_USE_HEAP	(1<<7)
    	__u16	setup_move_size;
    	__u32	code32_start;
    	__u32	ramdisk_image;
    	__u32	ramdisk_size;
    	__u32	bootsect_kludge;
    	__u16	heap_end_ptr;
    	__u8	ext_loader_ver;
    	__u8	ext_loader_type;
    	__u32	cmd_line_ptr;
    	__u32	initrd_addr_max;
    	__u32	kernel_alignment;
    	__u8	relocatable_kernel;
    	__u8	_pad2[3];
    	__u32	cmdline_size;
    	__u32	hardware_subarch;
    	__u64	hardware_subarch_data;
    	__u32	payload_offset;
    	__u32	payload_length;
    	__u64	setup_data;
    
    	__u64	pref_address;
    	__u32	init_size;
    	__u32	handover_offset;
    
    } __attribute__((packed));
    
    struct sys_desc_table {
    	__u16 length;
    	__u8  table[14];
    };
    
    struct efi_info {
    	__u32 efi_loader_signature;
    	__u32 efi_systab;
    	__u32 efi_memdesc_size;
    	__u32 efi_memdesc_version;
    	__u32 efi_memmap;
    	__u32 efi_memmap_size;
    	__u32 efi_systab_hi;
    	__u32 efi_memmap_hi;
    };
    
    /* The so-called "zeropage" */
    struct boot_params {
    	struct screen_info screen_info;			/* 0x000 */
    	struct apm_bios_info apm_bios_info;		/* 0x040 */
    	__u8  _pad2[4];					/* 0x054 */
    	__u64  tboot_addr;				/* 0x058 */
    	struct ist_info ist_info;			/* 0x060 */
    	__u8  _pad3[16];				/* 0x070 */
    	__u8  hd0_info[16];	/* obsolete! */		/* 0x080 */
    	__u8  hd1_info[16];	/* obsolete! */		/* 0x090 */
    	struct sys_desc_table sys_desc_table;		/* 0x0a0 */
    	__u8  _pad4[144];				/* 0x0b0 */
    	struct edid_info edid_info;			/* 0x140 */
    	struct efi_info efi_info;			/* 0x1c0 */
    	__u32 alt_mem_k;				/* 0x1e0 */
    	__u32 scratch;		/* Scratch field! */	/* 0x1e4 */
    	__u8  e820_entries;				/* 0x1e8 */
    	__u8  eddbuf_entries;				/* 0x1e9 */
    	__u8  edd_mbr_sig_buf_entries;			/* 0x1ea */
    	__u8  _pad6[6];					/* 0x1eb */
    	struct setup_header hdr;    /* setup header */	/* 0x1f1 */
    	__u8  _pad7[0x290-0x1f1-sizeof(struct setup_header)];
    	__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX];	/* 0x290 */
    	struct e820entry e820_map[E820MAX];		/* 0x2d0 */
    	__u8  _pad8[48];				/* 0xcd0 */
    	struct edd_info eddbuf[EDDMAXNR];		/* 0xd00 */
    	__u8  _pad9[276];				/* 0xeec */
    } __attribute__((packed));
    
    enum {
    	X86_SUBARCH_PC = 0,
    	X86_SUBARCH_LGUEST,
    	X86_SUBARCH_XEN,
    	X86_SUBARCH_MRST,
    	X86_NR_SUBARCHS,
    };
    #endif /* _ASM_X86_BOOTPARAM_H */