arch/x86/include/uapi/asm/bootparam.h

   1 #ifndef _ASM_X86_BOOTPARAM_H
   2 #define _ASM_X86_BOOTPARAM_H
   3
   4 /* setup_data types */
   5 #define SETUP_NONE                      0
   6 #define SETUP_E820_EXT                  1
   7 #define SETUP_DTB                       2
   8 #define SETUP_PCI                       3
   9 #define SETUP_EFI_VARS                  4
  10
  11 /* ram_size flags */
  12 #define RAMDISK_IMAGE_START_MASK        0x07FF
  13 #define RAMDISK_PROMPT_FLAG             0x8000
  14 #define RAMDISK_LOAD_FLAG               0x4000
  15
  16 /* loadflags */
  17 #define LOADED_HIGH     (1<<0)
  18 #define QUIET_FLAG      (1<<5)
  19 #define KEEP_SEGMENTS   (1<<6)
  20 #define CAN_USE_HEAP    (1<<7)
  21
  22 /* xloadflags */
  23 #define XLF_KERNEL_64                   (1<<0)
  24 #define XLF_CAN_BE_LOADED_ABOVE_4G      (1<<1)
  25 #define XLF_EFI_HANDOVER_32             (1<<2)
  26 #define XLF_EFI_HANDOVER_64             (1<<3)
  27
  28 #ifndef __ASSEMBLY__
  29
  30 #include <linux/types.h>
  31 #include <linux/screen_info.h>
  32 #include <linux/apm_bios.h>
  33 #include <linux/edd.h>
  34 #include <asm/e820.h>
  35 #include <asm/ist.h>
  36 #include <video/edid.h>
  37
  38 /* extensible setup data list node */
  39 struct setup_data {
  40         __u64 next;
  41         __u32 type;
  42         __u32 len;
  43         __u8 data[0];
  44 };
  45
  46 struct setup_header {
  47         __u8    setup_sects;
  48         __u16   root_flags;
  49         __u32   syssize;
  50         __u16   ram_size;
  51         __u16   vid_mode;
  52         __u16   root_dev;
  53         __u16   boot_flag;
  54         __u16   jump;
  55         __u32   header;
  56         __u16   version;
  57         __u32   realmode_swtch;
  58         __u16   start_sys;
  59         __u16   kernel_version;
  60         __u8    type_of_loader;
  61         __u8    loadflags;
  62         __u16   setup_move_size;
  63         __u32   code32_start;
  64         __u32   ramdisk_image;
  65         __u32   ramdisk_size;
  66         __u32   bootsect_kludge;
  67         __u16   heap_end_ptr;
  68         __u8    ext_loader_ver;
  69         __u8    ext_loader_type;
  70         __u32   cmd_line_ptr;
  71         __u32   initrd_addr_max;
  72         __u32   kernel_alignment;
  73         __u8    relocatable_kernel;
  74         __u8    min_alignment;
  75         __u16   xloadflags;
  76         __u32   cmdline_size;
  77         __u32   hardware_subarch;
  78         __u64   hardware_subarch_data;
  79         __u32   payload_offset;
  80         __u32   payload_length;
  81         __u64   setup_data;
  82         __u64   pref_address;
  83         __u32   init_size;
  84         __u32   handover_offset;
  85 } __attribute__((packed));
  86
  87 struct sys_desc_table {
  88         __u16 length;
  89         __u8  table[14];
  90 };
  91
  92 /* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
  93 struct olpc_ofw_header {
  94         __u32 ofw_magic;        /* OFW signature */
  95         __u32 ofw_version;
  96         __u32 cif_handler;      /* callback into OFW */
  97         __u32 irq_desc_table;
  98 } __attribute__((packed));
  99
 100 struct efi_info {
 101         __u32 efi_loader_signature;
 102         __u32 efi_systab;
 103         __u32 efi_memdesc_size;
 104         __u32 efi_memdesc_version;
 105         __u32 efi_memmap;
 106         __u32 efi_memmap_size;
 107         __u32 efi_systab_hi;
 108         __u32 efi_memmap_hi;
 109 };
 110
 111 /* The so-called "zeropage" */
 112 struct boot_params {
 113         struct screen_info screen_info;                 /* 0x000 */
 114         struct apm_bios_info apm_bios_info;             /* 0x040 */
 115         __u8  _pad2[4];                                 /* 0x054 */
 116         __u64  tboot_addr;                              /* 0x058 */
 117         struct ist_info ist_info;                       /* 0x060 */
 118         __u8  _pad3[16];                                /* 0x070 */
 119         __u8  hd0_info[16];     /* obsolete! */         /* 0x080 */
 120         __u8  hd1_info[16];     /* obsolete! */         /* 0x090 */
 121         struct sys_desc_table sys_desc_table;           /* 0x0a0 */
 122         struct olpc_ofw_header olpc_ofw_header;         /* 0x0b0 */
 123         __u32 ext_ramdisk_image;                        /* 0x0c0 */
 124         __u32 ext_ramdisk_size;                         /* 0x0c4 */
 125         __u32 ext_cmd_line_ptr;                         /* 0x0c8 */
 126         __u8  _pad4[116];                               /* 0x0cc */
 127         struct edid_info edid_info;                     /* 0x140 */
 128         struct efi_info efi_info;                       /* 0x1c0 */
 129         __u32 alt_mem_k;                                /* 0x1e0 */
 130         __u32 scratch;          /* Scratch field! */    /* 0x1e4 */
 131         __u8  e820_entries;                             /* 0x1e8 */
 132         __u8  eddbuf_entries;                           /* 0x1e9 */
 133         __u8  edd_mbr_sig_buf_entries;                  /* 0x1ea */
 134         __u8  kbd_status;                               /* 0x1eb */
 135         __u8  _pad5[3];                                 /* 0x1ec */
 136         /*
 137          * The sentinel is set to a nonzero value (0xff) in header.S.
 138          *
 139          * A bootloader is supposed to only take setup_header and put
 140          * it into a clean boot_params buffer. If it turns out that
 141          * it is clumsy or too generous with the buffer, it most
 142          * probably will pick up the sentinel variable too. The fact
 143          * that this variable then is still 0xff will let kernel
 144          * know that some variables in boot_params are invalid and
 145          * kernel should zero out certain portions of boot_params.
 146          */
 147         __u8  sentinel;                                 /* 0x1ef */
 148         __u8  _pad6[1];                                 /* 0x1f0 */
 149         struct setup_header hdr;    /* setup header */  /* 0x1f1 */
 150         __u8  _pad7[0x290-0x1f1-sizeof(struct setup_header)];
 151         __u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX];      /* 0x290 */
 152         struct e820entry e820_map[E820MAX];             /* 0x2d0 */
 153         __u8  _pad8[48];                                /* 0xcd0 */
 154         struct edd_info eddbuf[EDDMAXNR];               /* 0xd00 */
 155         __u8  _pad9[276];                               /* 0xeec */
 156 } __attribute__((packed));
 157
 158 enum {
 159         X86_SUBARCH_PC = 0,
 160         X86_SUBARCH_LGUEST,
 161         X86_SUBARCH_XEN,
 162         X86_SUBARCH_MRST,
 163         X86_SUBARCH_CE4100,
 164         X86_NR_SUBARCHS,
 165 };
 166
 167 #endif /* __ASSEMBLY__ */
 168
 169 #endif /* _ASM_X86_BOOTPARAM_H */