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