| /* 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 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) |
| #define XLF_5LEVEL (1<<5) |
| #define XLF_5LEVEL_ENABLED (1<<6) |
| #define XLF_MEM_ENCRYPTION (1<<7) |
| |
| #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> |
| |
| 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 (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 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 /* __ASSEMBLY__ */ |
| |
| #endif /* _ASM_X86_BOOTPARAM_H */ |
