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                       4
  10 #define SETUP_APPLE_PROPERTIES          5
  11
  12 /* ram_size flags */
  13 #define RAMDISK_IMAGE_START_MASK        0x07FF
  14 #define RAMDISK_PROMPT_FLAG             0x8000
  15 #define RAMDISK_LOAD_FLAG               0x4000
  16
  17 /* loadflags */
  18 #define LOADED_HIGH     (1<<0)
  19 #define KASLR_FLAG      (1<<1)
  20 #define QUIET_FLAG      (1<<5)
  21 #define KEEP_SEGMENTS   (1<<6)
  22 #define CAN_USE_HEAP    (1<<7)
  23
  24 /* xloadflags */
  25 #define XLF_KERNEL_64                   (1<<0)
  26 #define XLF_CAN_BE_LOADED_ABOVE_4G      (1<<1)
  27 #define XLF_EFI_HANDOVER_32             (1<<2)
  28 #define XLF_EFI_HANDOVER_64             (1<<3)
  29 #define XLF_EFI_KEXEC                   (1<<4)
  30
  31 #ifndef __ASSEMBLY__
  32
  33 #include <linux/types.h>
  34 #include <linux/screen_info.h>
  35 #include <linux/apm_bios.h>
  36 #include <linux/edd.h>
  37 #include <asm/e820.h>
  38 #include <asm/ist.h>
  39 #include <video/edid.h>
  40
  41 /* extensible setup data list node */
  42 struct setup_data {
  43         __u64 next;
  44         __u32 type;
  45         __u32 len;
  46         __u8 data[0];
  47 };
  48
  49 struct setup_header {
  50         __u8    setup_sects;
  51         __u16   root_flags;
  52         __u32   syssize;
  53         __u16   ram_size;
  54         __u16   vid_mode;
  55         __u16   root_dev;
  56         __u16   boot_flag;
  57         __u16   jump;
  58         __u32   header;
  59         __u16   version;
  60         __u32   realmode_swtch;
  61         __u16   start_sys;
  62         __u16   kernel_version;
  63         __u8    type_of_loader;
  64         __u8    loadflags;
  65         __u16   setup_move_size;
  66         __u32   code32_start;
  67         __u32   ramdisk_image;
  68         __u32   ramdisk_size;
  69         __u32   bootsect_kludge;
  70         __u16   heap_end_ptr;
  71         __u8    ext_loader_ver;
  72         __u8    ext_loader_type;
  73         __u32   cmd_line_ptr;
  74         __u32   initrd_addr_max;
  75         __u32   kernel_alignment;
  76         __u8    relocatable_kernel;
  77         __u8    min_alignment;
  78         __u16   xloadflags;
  79         __u32   cmdline_size;
  80         __u32   hardware_subarch;
  81         __u64   hardware_subarch_data;
  82         __u32   payload_offset;
  83         __u32   payload_length;
  84         __u64   setup_data;
  85         __u64   pref_address;
  86         __u32   init_size;
  87         __u32   handover_offset;
  88 } __attribute__((packed));
  89
  90 struct sys_desc_table {
  91         __u16 length;
  92         __u8  table[14];
  93 };
  94
  95 /* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
  96 struct olpc_ofw_header {
  97         __u32 ofw_magic;        /* OFW signature */
  98         __u32 ofw_version;
  99         __u32 cif_handler;      /* callback into OFW */
 100         __u32 irq_desc_table;
 101 } __attribute__((packed));
 102
 103 struct efi_info {
 104         __u32 efi_loader_signature;
 105         __u32 efi_systab;
 106         __u32 efi_memdesc_size;
 107         __u32 efi_memdesc_version;
 108         __u32 efi_memmap;
 109         __u32 efi_memmap_size;
 110         __u32 efi_systab_hi;
 111         __u32 efi_memmap_hi;
 112 };
 113
 114 /* The so-called "zeropage" */
 115 struct boot_params {
 116         struct screen_info screen_info;                 /* 0x000 */
 117         struct apm_bios_info apm_bios_info;             /* 0x040 */
 118         __u8  _pad2[4];                                 /* 0x054 */
 119         __u64  tboot_addr;                              /* 0x058 */
 120         struct ist_info ist_info;                       /* 0x060 */
 121         __u8  _pad3[16];                                /* 0x070 */
 122         __u8  hd0_info[16];     /* obsolete! */         /* 0x080 */
 123         __u8  hd1_info[16];     /* obsolete! */         /* 0x090 */
 124         struct sys_desc_table sys_desc_table; /* obsolete! */   /* 0x0a0 */
 125         struct olpc_ofw_header olpc_ofw_header;         /* 0x0b0 */
 126         __u32 ext_ramdisk_image;                        /* 0x0c0 */
 127         __u32 ext_ramdisk_size;                         /* 0x0c4 */
 128         __u32 ext_cmd_line_ptr;                         /* 0x0c8 */
 129         __u8  _pad4[116];                               /* 0x0cc */
 130         struct edid_info edid_info;                     /* 0x140 */
 131         struct efi_info efi_info;                       /* 0x1c0 */
 132         __u32 alt_mem_k;                                /* 0x1e0 */
 133         __u32 scratch;          /* Scratch field! */    /* 0x1e4 */
 134         __u8  e820_entries;                             /* 0x1e8 */
 135         __u8  eddbuf_entries;                           /* 0x1e9 */
 136         __u8  edd_mbr_sig_buf_entries;                  /* 0x1ea */
 137         __u8  kbd_status;                               /* 0x1eb */
 138         __u8  secure_boot;                              /* 0x1ec */
 139         __u8  _pad5[2];                                 /* 0x1ed */
 140         /*
 141          * The sentinel is set to a nonzero value (0xff) in header.S.
 142          *
 143          * A bootloader is supposed to only take setup_header and put
 144          * it into a clean boot_params buffer. If it turns out that
 145          * it is clumsy or too generous with the buffer, it most
 146          * probably will pick up the sentinel variable too. The fact
 147          * that this variable then is still 0xff will let kernel
 148          * know that some variables in boot_params are invalid and
 149          * kernel should zero out certain portions of boot_params.
 150          */
 151         __u8  sentinel;                                 /* 0x1ef */
 152         __u8  _pad6[1];                                 /* 0x1f0 */
 153         struct setup_header hdr;    /* setup header */  /* 0x1f1 */
 154         __u8  _pad7[0x290-0x1f1-sizeof(struct setup_header)];
 155         __u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX];      /* 0x290 */
 156         struct e820entry e820_map[E820MAX];             /* 0x2d0 */
 157         __u8  _pad8[48];                                /* 0xcd0 */
 158         struct edd_info eddbuf[EDDMAXNR];               /* 0xd00 */
 159         __u8  _pad9[276];                               /* 0xeec */
 160 } __attribute__((packed));
 161
 162 /**
 163  * enum x86_hardware_subarch - x86 hardware subarchitecture
 164  *
 165  * The x86 hardware_subarch and hardware_subarch_data were added as of the x86
 166  * boot protocol 2.07 to help distinguish and support custom x86 boot
 167  * sequences. This enum represents accepted values for the x86
 168  * hardware_subarch.  Custom x86 boot sequences (not X86_SUBARCH_PC) do not
 169  * have or simply *cannot* make use of natural stubs like BIOS or EFI, the
 170  * hardware_subarch can be used on the Linux entry path to revector to a
 171  * subarchitecture stub when needed. This subarchitecture stub can be used to
 172  * set up Linux boot parameters or for special care to account for nonstandard
 173  * handling of page tables.
 174  *
 175  * These enums should only ever be used by x86 code, and the code that uses
 176  * it should be well contained and compartamentalized.
 177  *
 178  * KVM and Xen HVM do not have a subarch as these are expected to follow
 179  * standard x86 boot entries. If there is a genuine need for "hypervisor" type
 180  * that should be considered separately in the future. Future guest types
 181  * should seriously consider working with standard x86 boot stubs such as
 182  * the BIOS or EFI boot stubs.
 183  *
 184  * WARNING: this enum is only used for legacy hacks, for platform features that
 185  *          are not easily enumerated or discoverable. You should not ever use
 186  *          this for new features.
 187  *
 188  * @X86_SUBARCH_PC: Should be used if the hardware is enumerable using standard
 189  *      PC mechanisms (PCI, ACPI) and doesn't need a special boot flow.
 190  * @X86_SUBARCH_LGUEST: Used for x86 hypervisor demo, lguest
 191  * @X86_SUBARCH_XEN: Used for Xen guest types which follow the PV boot path,
 192  *      which start at asm startup_xen() entry point and later jump to the C
 193  *      xen_start_kernel() entry point. Both domU and dom0 type of guests are
 194  *      currently supportd through this PV boot path.
 195  * @X86_SUBARCH_INTEL_MID: Used for Intel MID (Mobile Internet Device) platform
 196  *      systems which do not have the PCI legacy interfaces.
 197  * @X86_SUBARCH_CE4100: Used for Intel CE media processor (CE4100) SoC for
 198  *      for settop boxes and media devices, the use of a subarch for CE4100
 199  *      is more of a hack...
 200  */
 201 enum x86_hardware_subarch {
 202         X86_SUBARCH_PC = 0,
 203         X86_SUBARCH_LGUEST,
 204         X86_SUBARCH_XEN,
 205         X86_SUBARCH_INTEL_MID,
 206         X86_SUBARCH_CE4100,
 207         X86_NR_SUBARCHS,
 208 };
 209
 210 #endif /* __ASSEMBLY__ */
 211
 212 #endif /* _ASM_X86_BOOTPARAM_H */