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

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2/*
   3 * This file describes the structure passed from the BootX application
   4 * (for MacOS) when it is used to boot Linux.
   5 *
   6 * Written by Benjamin Herrenschmidt.
   7 */
   8
   9
  10#ifndef _UAPI__ASM_BOOTX_H__
  11#define _UAPI__ASM_BOOTX_H__
  12
  13#include <linux/types.h>
  14
  15#ifdef macintosh
  16#include <Types.h>
  17#include "linux_type_defs.h"
  18#endif
  19
  20#ifdef macintosh
  21/* All this requires PowerPC alignment */
  22#pragma options align=power
  23#endif
  24
  25/* On kernel entry:
  26 *
  27 * r3 = 0x426f6f58    ('BooX')
  28 * r4 = pointer to boot_infos
  29 * r5 = NULL
  30 *
  31 * Data and instruction translation disabled, interrupts
  32 * disabled, kernel loaded at physical 0x00000000 on PCI
  33 * machines (will be different on NuBus).
  34 */
  35
  36#define BOOT_INFO_VERSION               5
  37#define BOOT_INFO_COMPATIBLE_VERSION    1
  38
  39/* Bit in the architecture flag mask. More to be defined in
  40   future versions. Note that either BOOT_ARCH_PCI or
  41   BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
  42   set additionally when BOOT_ARCH_NUBUS is set.
  43 */
  44#define BOOT_ARCH_PCI                   0x00000001UL
  45#define BOOT_ARCH_NUBUS                 0x00000002UL
  46#define BOOT_ARCH_NUBUS_PDM             0x00000010UL
  47#define BOOT_ARCH_NUBUS_PERFORMA        0x00000020UL
  48#define BOOT_ARCH_NUBUS_POWERBOOK       0x00000040UL
  49
  50/*  Maximum number of ranges in phys memory map */
  51#define MAX_MEM_MAP_SIZE                                26
  52
  53/* This is the format of an element in the physical memory map. Note that
  54   the map is optional and current BootX will only build it for pre-PCI
  55   machines */
  56typedef struct boot_info_map_entry
  57{
  58    __u32       physAddr;                /* Physical starting address */
  59    __u32       size;                    /* Size in bytes */
  60} boot_info_map_entry_t;
  61
  62
  63/* Here are the boot informations that are passed to the bootstrap
  64 * Note that the kernel arguments and the device tree are appended
  65 * at the end of this structure. */
  66typedef struct boot_infos
  67{
  68    /* Version of this structure */
  69    __u32       version;
  70    /* backward compatible down to version: */
  71    __u32       compatible_version;
  72
  73    /* NEW (vers. 2) this holds the current _logical_ base addr of
  74       the frame buffer (for use by early boot message) */
  75    __u8*       logicalDisplayBase;
  76
  77    /* NEW (vers. 4) Apple's machine identification */
  78    __u32       machineID;
  79
  80    /* NEW (vers. 4) Detected hw architecture */
  81    __u32       architecture;
  82
  83    /* The device tree (internal addresses relative to the beginning of the tree,
  84     * device tree offset relative to the beginning of this structure).
  85     * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
  86     * field is 0.
  87     */
  88    __u32       deviceTreeOffset;        /* Device tree offset */
  89    __u32       deviceTreeSize;          /* Size of the device tree */
  90
  91    /* Some infos about the current MacOS display */
  92    __u32       dispDeviceRect[4];       /* left,top,right,bottom */
  93    __u32       dispDeviceDepth;         /* (8, 16 or 32) */
  94    __u8*       dispDeviceBase;          /* base address (physical) */
  95    __u32       dispDeviceRowBytes;      /* rowbytes (in bytes) */
  96    __u32       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */
  97    /* Optional offset in the registry to the current
  98     * MacOS display. (Can be 0 when not detected) */
  99     __u32      dispDeviceRegEntryOffset;
 100
 101    /* Optional pointer to boot ramdisk (offset from this structure) */
 102    __u32       ramDisk;
 103    __u32       ramDiskSize;             /* size of ramdisk image */
 104
 105    /* Kernel command line arguments (offset from this structure) */
 106    __u32       kernelParamsOffset;
 107
 108    /* ALL BELOW NEW (vers. 4) */
 109
 110    /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
 111       (non-PCI) only. On PCI, memory is contiguous and it's size is in the
 112       device-tree. */
 113    boot_info_map_entry_t
 114                physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
 115    __u32       physMemoryMapSize;               /* How many entries in map */
 116
 117
 118    /* The framebuffer size (optional, currently 0) */
 119    __u32       frameBufferSize;         /* Represents a max size, can be 0. */
 120
 121    /* NEW (vers. 5) */
 122
 123    /* Total params size (args + colormap + device tree + ramdisk) */
 124    __u32       totalParamsSize;
 125
 126} boot_infos_t;
 127
 128
 129#ifdef macintosh
 130#pragma options align=reset
 131#endif
 132
 133#endif /* _UAPI__ASM_BOOTX_H__ */
 134