LXR linux/arch/powerpc/include/uapi/asm/bootx.h

   1/*
   2 * This file describes the structure passed from the BootX application
   3 * (for MacOS) when it is used to boot Linux.
   4 *
   5 * Written by Benjamin Herrenschmidt.
   6 */
   7
   8
   9#ifndef _UAPI__ASM_BOOTX_H__
  10#define _UAPI__ASM_BOOTX_H__
  11
  12#include <linux/types.h>
  13
  14#ifdef macintosh
  15#include <Types.h>
  16#include "linux_type_defs.h"
  17#endif
  18
  19#ifdef macintosh
  20/* All this requires PowerPC alignment */
  21#pragma options align=power
  22#endif
  23
  24/* On kernel entry:
  25 *
  26 * r3 = 0x426f6f58    ('BooX')
  27 * r4 = pointer to boot_infos
  28 * r5 = NULL
  29 *
  30 * Data and instruction translation disabled, interrupts
  31 * disabled, kernel loaded at physical 0x00000000 on PCI
  32 * machines (will be different on NuBus).
  33 */
  34
  35#define BOOT_INFO_VERSION               5
  36#define BOOT_INFO_COMPATIBLE_VERSION    1
  37
  38/* Bit in the architecture flag mask. More to be defined in
  39   future versions. Note that either BOOT_ARCH_PCI or
  40   BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
  41   set additionally when BOOT_ARCH_NUBUS is set.
  42 */
  43#define BOOT_ARCH_PCI                   0x00000001UL
  44#define BOOT_ARCH_NUBUS                 0x00000002UL
  45#define BOOT_ARCH_NUBUS_PDM             0x00000010UL
  46#define BOOT_ARCH_NUBUS_PERFORMA        0x00000020UL
  47#define BOOT_ARCH_NUBUS_POWERBOOK       0x00000040UL
  48
  49/*  Maximum number of ranges in phys memory map */
  50#define MAX_MEM_MAP_SIZE                                26
  51
  52/* This is the format of an element in the physical memory map. Note that
  53   the map is optional and current BootX will only build it for pre-PCI
  54   machines */
  55typedef struct boot_info_map_entry
  56{
  57    __u32       physAddr;                /* Physical starting address */
  58    __u32       size;                    /* Size in bytes */
  59} boot_info_map_entry_t;
  60
  61
  62/* Here are the boot informations that are passed to the bootstrap
  63 * Note that the kernel arguments and the device tree are appended
  64 * at the end of this structure. */
  65typedef struct boot_infos
  66{
  67    /* Version of this structure */
  68    __u32       version;
  69    /* backward compatible down to version: */
  70    __u32       compatible_version;
  71
  72    /* NEW (vers. 2) this holds the current _logical_ base addr of
  73       the frame buffer (for use by early boot message) */
  74    __u8*       logicalDisplayBase;
  75
  76    /* NEW (vers. 4) Apple's machine identification */
  77    __u32       machineID;
  78
  79    /* NEW (vers. 4) Detected hw architecture */
  80    __u32       architecture;
  81
  82    /* The device tree (internal addresses relative to the beginning of the tree,
  83     * device tree offset relative to the beginning of this structure).
  84     * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
  85     * field is 0.
  86     */
  87    __u32       deviceTreeOffset;        /* Device tree offset */
  88    __u32       deviceTreeSize;          /* Size of the device tree */
  89
  90    /* Some infos about the current MacOS display */
  91    __u32       dispDeviceRect[4];       /* left,top,right,bottom */
  92    __u32       dispDeviceDepth;         /* (8, 16 or 32) */
  93    __u8*       dispDeviceBase;          /* base address (physical) */
  94    __u32       dispDeviceRowBytes;      /* rowbytes (in bytes) */
  95    __u32       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */
  96    /* Optional offset in the registry to the current
  97     * MacOS display. (Can be 0 when not detected) */
  98     __u32      dispDeviceRegEntryOffset;
  99
 100    /* Optional pointer to boot ramdisk (offset from this structure) */
 101    __u32       ramDisk;
 102    __u32       ramDiskSize;             /* size of ramdisk image */
 103
 104    /* Kernel command line arguments (offset from this structure) */
 105    __u32       kernelParamsOffset;
 106
 107    /* ALL BELOW NEW (vers. 4) */
 108
 109    /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
 110       (non-PCI) only. On PCI, memory is contiguous and it's size is in the
 111       device-tree. */
 112    boot_info_map_entry_t
 113                physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
 114    __u32       physMemoryMapSize;               /* How many entries in map */
 115
 116
 117    /* The framebuffer size (optional, currently 0) */
 118    __u32       frameBufferSize;         /* Represents a max size, can be 0. */
 119
 120    /* NEW (vers. 5) */
 121
 122    /* Total params size (args + colormap + device tree + ramdisk) */
 123    __u32       totalParamsSize;
 124
 125} boot_infos_t;
 126
 127
 128#ifdef macintosh
 129#pragma options align=reset
 130#endif
 131
 132#endif /* _UAPI__ASM_BOOTX_H__ */
 133