1 #ifndef _ASM_X86_BOOTPARAM_H 2 #define _ASM_X86_BOOTPARAM_H 3 4 #include <linux/types.h> 5 #include <linux/screen_info.h> 6 #include <linux/apm_bios.h> 7 #include <linux/edd.h> 8 #include <asm/e820.h> 9 #include <asm/ist.h> 10 #include <asm/video/edid.h> 11 12 /* setup_data/setup_indirect types */ 13 #define SETUP_NONE 0 14 #define SETUP_E820_EXT 1 15 #define SETUP_DTB 2 16 #define SETUP_PCI 3 17 #define SETUP_EFI 4 18 #define SETUP_APPLE_PROPERTIES 5 19 #define SETUP_JAILHOUSE 6 20 #define SETUP_CC_BLOB 7 21 #define SETUP_IMA 8 22 #define SETUP_RNG_SEED 9 23 #define SETUP_ENUM_MAX SETUP_RNG_SEED 24 25 #define SETUP_INDIRECT BIT(31) 26 #define SETUP_TYPE_MAX (SETUP_ENUM_MAX | SETUP_INDIRECT) 27 28 /* ram_size flags */ 29 #define RAMDISK_IMAGE_START_MASK 0x07FF 30 #define RAMDISK_PROMPT_FLAG 0x8000 31 #define RAMDISK_LOAD_FLAG 0x4000 32 33 /* loadflags */ 34 #define LOADED_HIGH BIT(0) 35 #define KASLR_FLAG BIT(1) 36 #define QUIET_FLAG BIT(5) 37 #define KEEP_SEGMENTS BIT(6) 38 #define CAN_USE_HEAP BIT(7) 39 40 #define XLF_KERNEL_64 BIT(0) 41 #define XLF_CAN_BE_LOADED_ABOVE_4G BIT(1) 42 #define XLF_EFI_HANDOVER_32 BIT(2) 43 #define XLF_EFI_HANDOVER_64 BIT(3) 44 #define XLF_EFI_KEXEC BIT(4) 45 46 /* extensible setup data list node */ 47 struct setup_data { 48 __u64 next; 49 __u32 type; 50 __u32 len; 51 __u8 data[]; 52 }; 53 54 /* extensible setup indirect data node */ 55 struct setup_indirect { 56 __u32 type; 57 __u32 reserved; /* Reserved, must be set to zero. */ 58 __u64 len; 59 __u64 addr; 60 }; 61 62 /** 63 * struct setup_header - Information needed by Linux to boot 64 * 65 * See https://www.kernel.org/doc/html/latest/x86/boot.html 66 */ 67 struct setup_header { 68 __u8 setup_sects; 69 __u16 root_flags; 70 __u32 syssize; 71 __u16 ram_size; 72 __u16 vid_mode; 73 __u16 root_dev; 74 __u16 boot_flag; 75 __u16 jump; 76 __u32 header; 77 __u16 version; 78 __u32 realmode_swtch; 79 __u16 start_sys_seg; 80 __u16 kernel_version; 81 __u8 type_of_loader; 82 __u8 loadflags; 83 __u16 setup_move_size; 84 __u32 code32_start; 85 __u32 ramdisk_image; 86 __u32 ramdisk_size; 87 __u32 bootsect_kludge; /* Obsolete */ 88 __u16 heap_end_ptr; 89 __u8 ext_loader_ver; 90 __u8 ext_loader_type; 91 __u32 cmd_line_ptr; 92 __u32 initrd_addr_max; 93 __u32 kernel_alignment; 94 __u8 relocatable_kernel; 95 __u8 min_alignment; 96 __u16 xloadflags; 97 __u32 cmdline_size; 98 __u32 hardware_subarch; 99 __u64 hardware_subarch_data; 100 __u32 payload_offset; 101 __u32 payload_length; 102 __u64 setup_data; 103 __u64 pref_address; 104 __u32 init_size; 105 __u32 handover_offset; 106 __u32 kernel_info_offset; 107 } __attribute__((packed)); 108 109 struct sys_desc_table { 110 __u16 length; 111 __u8 table[14]; 112 }; 113 114 struct efi_info { 115 __u32 efi_loader_signature; 116 __u32 efi_systab; 117 __u32 efi_memdesc_size; 118 __u32 efi_memdesc_version; 119 __u32 efi_memmap; 120 __u32 efi_memmap_size; 121 __u32 efi_systab_hi; 122 __u32 efi_memmap_hi; 123 }; 124 125 /* The so-called "zeropage" */ 126 struct boot_params { 127 struct screen_info screen_info; /* 0x000 */ 128 struct apm_bios_info apm_bios_info; /* 0x040 */ 129 __u8 _pad2[4]; /* 0x054 */ 130 __u64 tboot_addr; /* 0x058 */ 131 struct ist_info ist_info; /* 0x060 */ 132 __u64 acpi_rsdp_addr; /* 0x070 */ 133 __u8 _pad3[8]; /* 0x078 */ 134 __u8 hd0_info[16]; /* obsolete! */ /* 0x080 */ 135 __u8 hd1_info[16]; /* obsolete! */ /* 0x090 */ 136 struct sys_desc_table sys_desc_table; /* 0x0a0 */ 137 __u8 _pad4[144]; /* 0x0b0 */ 138 struct edid_info edid_info; /* 0x140 */ 139 struct efi_info efi_info; /* 0x1c0 */ 140 __u32 alt_mem_k; /* 0x1e0 */ 141 __u32 scratch; /* Scratch field! */ /* 0x1e4 */ 142 __u8 e820_entries; /* 0x1e8 */ 143 __u8 eddbuf_entries; /* 0x1e9 */ 144 __u8 edd_mbr_sig_buf_entries; /* 0x1ea */ 145 __u8 _pad6[6]; /* 0x1eb */ 146 struct setup_header hdr; /* setup header */ /* 0x1f1 */ 147 __u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)]; 148 __u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */ 149 struct e820_entry e820_map[E820MAX]; /* 0x2d0 */ 150 __u8 _pad8[48]; /* 0xcd0 */ 151 struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */ 152 __u8 _pad9[276]; /* 0xeec */ 153 } __attribute__((packed)); 154 155 enum { 156 X86_SUBARCH_PC = 0, 157 X86_SUBARCH_LGUEST, 158 X86_SUBARCH_XEN, 159 X86_SUBARCH_INTEL_MID, 160 X86_SUBARCH_CE4100, 161 X86_NR_SUBARCHS, 162 }; 163 #endif /* _ASM_X86_BOOTPARAM_H */ 164