250 lines
7.5 KiB
C
250 lines
7.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _ASM_X86_BOOTPARAM_H
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#define _ASM_X86_BOOTPARAM_H
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/* setup_data types */
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#define SETUP_NONE 0
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#define SETUP_E820_EXT 1
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#define SETUP_DTB 2
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#define SETUP_PCI 3
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#define SETUP_EFI 4
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#define SETUP_APPLE_PROPERTIES 5
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#define SETUP_JAILHOUSE 6
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/* ram_size flags */
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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/* loadflags */
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#define LOADED_HIGH (1<<0)
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#define KASLR_FLAG (1<<1)
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#define QUIET_FLAG (1<<5)
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#define KEEP_SEGMENTS (1<<6)
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#define CAN_USE_HEAP (1<<7)
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/* xloadflags */
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#define XLF_KERNEL_64 (1<<0)
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#define XLF_CAN_BE_LOADED_ABOVE_4G (1<<1)
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#define XLF_EFI_HANDOVER_32 (1<<2)
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#define XLF_EFI_HANDOVER_64 (1<<3)
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#define XLF_EFI_KEXEC (1<<4)
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#include <linux/screen_info.h>
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#include <linux/apm_bios.h>
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#include <linux/edd.h>
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#include <asm/ist.h>
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#include <video/edid.h>
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/* extensible setup data list node */
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struct setup_data {
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__u64 next;
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__u32 type;
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__u32 len;
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__u8 data[0];
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};
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struct setup_header {
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__u8 setup_sects;
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__u16 root_flags;
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__u32 syssize;
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__u16 ram_size;
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__u16 vid_mode;
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__u16 root_dev;
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__u16 boot_flag;
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__u16 jump;
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__u32 header;
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__u16 version;
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__u32 realmode_swtch;
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__u16 start_sys_seg;
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__u16 kernel_version;
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__u8 type_of_loader;
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__u8 loadflags;
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__u16 setup_move_size;
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__u32 code32_start;
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__u32 ramdisk_image;
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__u32 ramdisk_size;
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__u32 bootsect_kludge;
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__u16 heap_end_ptr;
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__u8 ext_loader_ver;
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__u8 ext_loader_type;
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__u32 cmd_line_ptr;
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__u32 initrd_addr_max;
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__u32 kernel_alignment;
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__u8 relocatable_kernel;
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__u8 min_alignment;
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__u16 xloadflags;
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__u32 cmdline_size;
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__u32 hardware_subarch;
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__u64 hardware_subarch_data;
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__u32 payload_offset;
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__u32 payload_length;
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__u64 setup_data;
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__u64 pref_address;
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__u32 init_size;
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__u32 handover_offset;
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} __attribute__((packed));
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struct sys_desc_table {
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__u16 length;
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__u8 table[14];
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};
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/* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
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struct olpc_ofw_header {
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__u32 ofw_magic; /* OFW signature */
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__u32 ofw_version;
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__u32 cif_handler; /* callback into OFW */
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__u32 irq_desc_table;
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} __attribute__((packed));
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struct efi_info {
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__u32 efi_loader_signature;
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__u32 efi_systab;
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__u32 efi_memdesc_size;
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__u32 efi_memdesc_version;
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__u32 efi_memmap;
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__u32 efi_memmap_size;
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__u32 efi_systab_hi;
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__u32 efi_memmap_hi;
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};
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/*
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* This is the maximum number of entries in struct boot_params::e820_table
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* (the zeropage), which is part of the x86 boot protocol ABI:
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*/
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#define E820_MAX_ENTRIES_ZEROPAGE 128
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/*
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* The E820 memory region entry of the boot protocol ABI:
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*/
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struct boot_e820_entry {
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__u64 addr;
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__u64 size;
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__u32 type;
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} __attribute__((packed));
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/*
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* Smallest compatible version of jailhouse_setup_data required by this kernel.
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*/
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#define JAILHOUSE_SETUP_REQUIRED_VERSION 1
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/*
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* The boot loader is passing platform information via this Jailhouse-specific
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* setup data structure.
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*/
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struct jailhouse_setup_data {
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__u16 version;
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__u16 compatible_version;
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__u16 pm_timer_address;
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__u16 num_cpus;
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__u64 pci_mmconfig_base;
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__u32 tsc_khz;
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__u32 apic_khz;
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__u8 standard_ioapic;
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__u8 cpu_ids[255];
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} __attribute__((packed));
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/* The so-called "zeropage" */
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struct boot_params {
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struct screen_info screen_info; /* 0x000 */
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struct apm_bios_info apm_bios_info; /* 0x040 */
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__u8 _pad2[4]; /* 0x054 */
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__u64 tboot_addr; /* 0x058 */
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struct ist_info ist_info; /* 0x060 */
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__u8 _pad3[16]; /* 0x070 */
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__u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
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__u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
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struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */
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struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */
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__u32 ext_ramdisk_image; /* 0x0c0 */
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__u32 ext_ramdisk_size; /* 0x0c4 */
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__u32 ext_cmd_line_ptr; /* 0x0c8 */
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__u8 _pad4[116]; /* 0x0cc */
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struct edid_info edid_info; /* 0x140 */
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struct efi_info efi_info; /* 0x1c0 */
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__u32 alt_mem_k; /* 0x1e0 */
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__u32 scratch; /* Scratch field! */ /* 0x1e4 */
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__u8 e820_entries; /* 0x1e8 */
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__u8 eddbuf_entries; /* 0x1e9 */
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__u8 edd_mbr_sig_buf_entries; /* 0x1ea */
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__u8 kbd_status; /* 0x1eb */
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__u8 secure_boot; /* 0x1ec */
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__u8 _pad5[2]; /* 0x1ed */
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/*
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* The sentinel is set to a nonzero value (0xff) in header.S.
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*
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* A bootloader is supposed to only take setup_header and put
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* it into a clean boot_params buffer. If it turns out that
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* it is clumsy or too generous with the buffer, it most
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* probably will pick up the sentinel variable too. The fact
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* that this variable then is still 0xff will let kernel
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* know that some variables in boot_params are invalid and
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* kernel should zero out certain portions of boot_params.
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*/
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__u8 sentinel; /* 0x1ef */
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__u8 _pad6[1]; /* 0x1f0 */
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struct setup_header hdr; /* setup header */ /* 0x1f1 */
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__u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
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__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
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struct boot_e820_entry e820_table[E820_MAX_ENTRIES_ZEROPAGE]; /* 0x2d0 */
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__u8 _pad8[48]; /* 0xcd0 */
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struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
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__u8 _pad9[276]; /* 0xeec */
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} __attribute__((packed));
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/**
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* enum x86_hardware_subarch - x86 hardware subarchitecture
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*
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* The x86 hardware_subarch and hardware_subarch_data were added as of the x86
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* boot protocol 2.07 to help distinguish and support custom x86 boot
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* sequences. This enum represents accepted values for the x86
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* hardware_subarch. Custom x86 boot sequences (not X86_SUBARCH_PC) do not
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* have or simply *cannot* make use of natural stubs like BIOS or EFI, the
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* hardware_subarch can be used on the Linux entry path to revector to a
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* subarchitecture stub when needed. This subarchitecture stub can be used to
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* set up Linux boot parameters or for special care to account for nonstandard
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* handling of page tables.
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*
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* These enums should only ever be used by x86 code, and the code that uses
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* it should be well contained and compartamentalized.
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*
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* KVM and Xen HVM do not have a subarch as these are expected to follow
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* standard x86 boot entries. If there is a genuine need for "hypervisor" type
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* that should be considered separately in the future. Future guest types
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* should seriously consider working with standard x86 boot stubs such as
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* the BIOS or EFI boot stubs.
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*
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* WARNING: this enum is only used for legacy hacks, for platform features that
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* are not easily enumerated or discoverable. You should not ever use
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* this for new features.
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*
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* @X86_SUBARCH_PC: Should be used if the hardware is enumerable using standard
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* PC mechanisms (PCI, ACPI) and doesn't need a special boot flow.
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* @X86_SUBARCH_LGUEST: Used for x86 hypervisor demo, lguest, deprecated
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* @X86_SUBARCH_XEN: Used for Xen guest types which follow the PV boot path,
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* which start at asm startup_xen() entry point and later jump to the C
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* xen_start_kernel() entry point. Both domU and dom0 type of guests are
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* currently supportd through this PV boot path.
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* @X86_SUBARCH_INTEL_MID: Used for Intel MID (Mobile Internet Device) platform
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* systems which do not have the PCI legacy interfaces.
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* @X86_SUBARCH_CE4100: Used for Intel CE media processor (CE4100) SoC for
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* for settop boxes and media devices, the use of a subarch for CE4100
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* is more of a hack...
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*/
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enum x86_hardware_subarch {
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X86_SUBARCH_PC = 0,
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X86_SUBARCH_LGUEST,
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X86_SUBARCH_XEN,
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X86_SUBARCH_INTEL_MID,
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X86_SUBARCH_CE4100,
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X86_NR_SUBARCHS,
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};
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_BOOTPARAM_H */
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