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/*

 * This file describes the structure passed from the BootX application

 * (for MacOS) when it is used to boot Linux.

 *

 * Written by Benjamin Herrenschmidt.

 */

#ifndef __ASM_BOOTX_H__

#define __ASM_BOOTX_H__

#ifdef macintosh

#include <Types.h>

#include "linux_type_defs.h"

#endif

#ifdef macintosh

/* All this requires PowerPC alignment */

#pragma options align=power

#endif

/* On kernel entry:

 *

 * r3 = 0x426f6f58    ('BooX')

 * r4 = pointer to boot_infos

 * r5 = NULL

 *

 * Data and instruction translation disabled, interrupts

 * disabled, kernel loaded at physical 0x00000000 on PCI

 * machines (will be different on NuBus).

 */

#define BOOT_INFO_VERSION               5

#define BOOT_INFO_COMPATIBLE_VERSION    1

/* Bit in the architecture flag mask. More to be defined in

   future versions. Note that either BOOT_ARCH_PCI or

   BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are

   set additionally when BOOT_ARCH_NUBUS is set.

 */

#define BOOT_ARCH_PCI                   0x00000001UL

#define BOOT_ARCH_NUBUS                 0x00000002UL

#define BOOT_ARCH_NUBUS_PDM             0x00000010UL

#define BOOT_ARCH_NUBUS_PERFORMA        0x00000020UL

#define BOOT_ARCH_NUBUS_POWERBOOK       0x00000040UL

/*  Maximum number of ranges in phys memory map */

#define MAX_MEM_MAP_SIZE                                26

/* This is the format of an element in the physical memory map. Note that

   the map is optional and current BootX will only build it for pre-PCI

   machines */

typedef struct boot_info_map_entry

{

    __u32       physAddr;                /* Physical starting address */

    __u32       size;                    /* Size in bytes */

} boot_info_map_entry_t;

/* Here are the boot informations that are passed to the bootstrap

 * Note that the kernel arguments and the device tree are appended

 * at the end of this structure. */

typedef struct boot_infos

{

    /* Version of this structure */

    __u32       version;

    /* backward compatible down to version: */

    __u32       compatible_version;

    /* NEW (vers. 2) this holds the current _logical_ base addr of

       the frame buffer (for use by early boot message) */

    __u8*       logicalDisplayBase;

    /* NEW (vers. 4) Apple's machine identification */

    __u32       machineID;

    /* NEW (vers. 4) Detected hw architecture */

    __u32       architecture;

    /* The device tree (internal addresses relative to the beginning of the tree,

     * device tree offset relative to the beginning of this structure).

     * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this

     * field is 0.

     */

    __u32       deviceTreeOffset;        /* Device tree offset */

    __u32       deviceTreeSize;          /* Size of the device tree */

    /* Some infos about the current MacOS display */

    __u32       dispDeviceRect[4];       /* left,top,right,bottom */

    __u32       dispDeviceDepth;         /* (8, 16 or 32) */

    __u8*       dispDeviceBase;          /* base address (physical) */

    __u32       dispDeviceRowBytes;      /* rowbytes (in bytes) */

    __u32       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */

    /* Optional offset in the registry to the current

     * MacOS display. (Can be 0 when not detected) */

     __u32      dispDeviceRegEntryOffset;

    /* Optional pointer to boot ramdisk (offset from this structure) */

    __u32       ramDisk;

    __u32       ramDiskSize;             /* size of ramdisk image */

    /* Kernel command line arguments (offset from this structure) */

    __u32       kernelParamsOffset;

    /* ALL BELOW NEW (vers. 4) */

    /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag

       (non-PCI) only. On PCI, memory is contiguous and it's size is in the

       device-tree. */

    boot_info_map_entry_t

                physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */

    __u32       physMemoryMapSize;               /* How many entries in map */

    /* The framebuffer size (optional, currently 0) */

    __u32       frameBufferSize;         /* Represents a max size, can be 0. */

    /* NEW (vers. 5) */

    /* Total params size (args + colormap + device tree + ramdisk) */

    __u32       totalParamsSize;

} boot_infos_t;

/* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index is represented

 * by 3 short words containing a 16 bits (unsigned) color component.

 * Later versions may contain the gamma table for direct-color devices here.

 */

#define BOOTX_COLORTABLE_SIZE    (256UL*3UL*2UL)

#ifdef macintosh

#pragma options align=reset

#endif

#endif