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 */
  56 typedef 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. */
  66 typedef 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__ */