/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_X86_BOOTPARAM_H
#define _ASM_X86_BOOTPARAM_H
#include <asm /setup_data.h>
/* ram_size flags */
#define RAMDISK_IMAGE_START_MASK 0 x07FF
#define RAMDISK_PROMPT_FLAG 0 x8000
#define RAMDISK_LOAD_FLAG 0 x4000
/* loadflags */
#define LOADED_HIGH (1 <<0 )
#define KASLR_FLAG (1 <<1 )
#define QUIET_FLAG (1 <<5 )
#define KEEP_SEGMENTS (1 <<6 )
#define CAN_USE_HEAP (1 <<7 )
/* xloadflags */
#define XLF_KERNEL_64 (1 <<0 )
#define XLF_CAN_BE_LOADED_ABOVE_4G (1 <<1 )
#define XLF_EFI_HANDOVER_32 (1 <<2 )
#define XLF_EFI_HANDOVER_64 (1 <<3 )
#define XLF_EFI_KEXEC (1 <<4 )
#define XLF_5LEVEL (1 <<5 )
#define XLF_5LEVEL_ENABLED (1 <<6 )
#define XLF_MEM_ENCRYPTION (1 <<7 )
#ifndef __ASSEMBLER__
#include <linux/types.h>
#include <linux/screen_info.h>
#include <linux/apm_bios.h>
#include <linux/edd.h>
#include <asm /ist.h>
#include <video/edid.h>
struct setup_header {
__u8 setup_sects;
__u16 root_flags;
__u32 syssize;
__u16 ram_size;
__u16 vid_mode;
__u16 root_dev;
__u16 boot_flag;
__u16 jump;
__u32 header;
__u16 version;
__u32 realmode_swtch;
__u16 start_sys_seg;
__u16 kernel_version;
__u8 type_of_loader;
__u8 loadflags;
__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 min_alignment;
__u16 xloadflags;
__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;
__u32 kernel_info_offset;
} __attribute__((packed));
struct sys_desc_table {
__u16 length;
__u8 table[14 ];
};
/* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
struct olpc_ofw_header {
__u32 ofw_magic; /* OFW signature */
__u32 ofw_version;
__u32 cif_handler; /* callback into OFW */
__u32 irq_desc_table;
} __attribute__((packed));
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;
};
/*
* This is the maximum number of entries in struct boot_params : : e820_table
* ( the zeropage ) , which is part of the x86 boot protocol ABI :
*/
#define E820_MAX_ENTRIES_ZEROPAGE 128
/*
* Smallest compatible version of jailhouse_setup_data required by this kernel .
*/
#define JAILHOUSE_SETUP_REQUIRED_VERSION 1
/* 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 */
__u64 acpi_rsdp_addr; /* 0x070 */
__u8 _pad3[8 ]; /* 0x078 */
__u8 hd0_info[16 ]; /* obsolete! */ /* 0x080 */
__u8 hd1_info[16 ]; /* obsolete! */ /* 0x090 */
struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */
struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */
__u32 ext_ramdisk_image; /* 0x0c0 */
__u32 ext_ramdisk_size; /* 0x0c4 */
__u32 ext_cmd_line_ptr; /* 0x0c8 */
__u8 _pad4[112 ]; /* 0x0cc */
__u32 cc_blob_address; /* 0x13c */
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 kbd_status; /* 0x1eb */
__u8 secure_boot; /* 0x1ec */
__u8 _pad5[2 ]; /* 0x1ed */
/*
* The sentinel is set to a nonzero value ( 0 xff ) in header . S .
*
* A bootloader is supposed to only take setup_header and put
* it into a clean boot_params buffer . If it turns out that
* it is clumsy or too generous with the buffer , it most
* probably will pick up the sentinel variable too . The fact
* that this variable then is still 0 xff will let kernel
* know that some variables in boot_params are invalid and
* kernel should zero out certain portions of boot_params .
*/
__u8 sentinel; /* 0x1ef */
__u8 _pad6[1 ]; /* 0x1f0 */
struct setup_header hdr; /* setup header */ /* 0x1f1 */
__u8 _pad7[0 x290-0 x1f1-sizeof (struct setup_header)];
__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
struct boot_e820_entry e820_table[E820_MAX_ENTRIES_ZEROPAGE]; /* 0x2d0 */
__u8 _pad8[48 ]; /* 0xcd0 */
struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
__u8 _pad9[276 ]; /* 0xeec */
} __attribute__((packed));
/**
* enum x86_hardware_subarch - x86 hardware subarchitecture
*
* The x86 hardware_subarch and hardware_subarch_data were added as of the x86
* boot protocol 2 . 07 to help distinguish and support custom x86 boot
* sequences . This enum represents accepted values for the x86
* hardware_subarch . Custom x86 boot sequences ( not X86_SUBARCH_PC ) do not
* have or simply * cannot * make use of natural stubs like BIOS or EFI , the
* hardware_subarch can be used on the Linux entry path to revector to a
* subarchitecture stub when needed . This subarchitecture stub can be used to
* set up Linux boot parameters or for special care to account for nonstandard
* handling of page tables .
*
* These enums should only ever be used by x86 code , and the code that uses
* it should be well contained and compartmentalized .
*
* KVM and Xen HVM do not have a subarch as these are expected to follow
* standard x86 boot entries . If there is a genuine need for " hypervisor " type
* that should be considered separately in the future . Future guest types
* should seriously consider working with standard x86 boot stubs such as
* the BIOS or EFI boot stubs .
*
* WARNING : this enum is only used for legacy hacks , for platform features that
* are not easily enumerated or discoverable . You should not ever use
* this for new features .
*
* @ X86_SUBARCH_PC : Should be used if the hardware is enumerable using standard
* PC mechanisms ( PCI , ACPI ) and doesn ' t need a special boot flow .
* @ X86_SUBARCH_LGUEST : Used for x86 hypervisor demo , lguest , deprecated
* @ X86_SUBARCH_XEN : Used for Xen guest types which follow the PV boot path ,
* which start at asm startup_xen ( ) entry point and later jump to the C
* xen_start_kernel ( ) entry point . Both domU and dom0 type of guests are
* currently supported through this PV boot path .
* @ X86_SUBARCH_INTEL_MID : Used for Intel MID ( Mobile Internet Device ) platform
* systems which do not have the PCI legacy interfaces .
* @ X86_SUBARCH_CE4100 : Used for Intel CE media processor ( CE4100 ) SoC
* for settop boxes and media devices , the use of a subarch for CE4100
* is more of a hack . . .
*/
enum x86_hardware_subarch {
X86_SUBARCH_PC = 0 ,
X86_SUBARCH_LGUEST,
X86_SUBARCH_XEN,
X86_SUBARCH_INTEL_MID,
X86_SUBARCH_CE4100,
X86_NR_SUBARCHS,
};
#endif /* __ASSEMBLER__ */
#endif /* _ASM_X86_BOOTPARAM_H */
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