| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | |
| #ifndef _ASM_X86_BOOTPARAM_H | |
| #define _ASM_X86_BOOTPARAM_H | |
| /* setup_data types */ | |
| #define SETUP_NONE 0 | |
| #define SETUP_E820_EXT 1 | |
| #define SETUP_DTB 2 | |
| #define SETUP_PCI 3 | |
| #define SETUP_EFI 4 | |
| #define SETUP_APPLE_PROPERTIES 5 | |
| /* ram_size flags */ | |
| #define RAMDISK_IMAGE_START_MASK 0x07FF | |
| #define RAMDISK_PROMPT_FLAG 0x8000 | |
| #define RAMDISK_LOAD_FLAG 0x4000 | |
| /* 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) | |
| #ifndef __ASSEMBLY__ | |
| #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> | |
| /* 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; | |
| __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; | |
| } __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 | |
| /* | |
| * The E820 memory region entry of the boot protocol ABI: | |
| */ | |
| struct boot_e820_entry { | |
| __u64 addr; | |
| __u64 size; | |
| __u32 type; | |
| } __attribute__((packed)); | |
| /* 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; /* 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[116]; /* 0x0cc */ | |
| 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 (0xff) 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 0xff 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[0x290-0x1f1-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 compartamentalized. | |
| * | |
| * 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 supportd 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 | |
| * 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 /* __ASSEMBLY__ */ | |
| #endif /* _ASM_X86_BOOTPARAM_H */ |