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1da177e4 LT |
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 __ASM_BOOTX_H__ | |
10 | #define __ASM_BOOTX_H__ | |
11 | ||
12 | #ifdef macintosh | |
13 | #include <Types.h> | |
14 | #include "linux_type_defs.h" | |
15 | #endif | |
16 | ||
17 | #ifdef macintosh | |
18 | /* All this requires PowerPC alignment */ | |
19 | #pragma options align=power | |
20 | #endif | |
21 | ||
22 | /* On kernel entry: | |
23 | * | |
24 | * r3 = 0x426f6f58 ('BooX') | |
25 | * r4 = pointer to boot_infos | |
26 | * r5 = NULL | |
27 | * | |
28 | * Data and instruction translation disabled, interrupts | |
29 | * disabled, kernel loaded at physical 0x00000000 on PCI | |
30 | * machines (will be different on NuBus). | |
31 | */ | |
32 | ||
33 | #define BOOT_INFO_VERSION 5 | |
34 | #define BOOT_INFO_COMPATIBLE_VERSION 1 | |
35 | ||
36 | /* Bit in the architecture flag mask. More to be defined in | |
37 | future versions. Note that either BOOT_ARCH_PCI or | |
38 | BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are | |
39 | set additionally when BOOT_ARCH_NUBUS is set. | |
40 | */ | |
41 | #define BOOT_ARCH_PCI 0x00000001UL | |
42 | #define BOOT_ARCH_NUBUS 0x00000002UL | |
43 | #define BOOT_ARCH_NUBUS_PDM 0x00000010UL | |
44 | #define BOOT_ARCH_NUBUS_PERFORMA 0x00000020UL | |
45 | #define BOOT_ARCH_NUBUS_POWERBOOK 0x00000040UL | |
46 | ||
47 | /* Maximum number of ranges in phys memory map */ | |
48 | #define MAX_MEM_MAP_SIZE 26 | |
49 | ||
50 | /* This is the format of an element in the physical memory map. Note that | |
51 | the map is optional and current BootX will only build it for pre-PCI | |
52 | machines */ | |
53 | typedef struct boot_info_map_entry | |
54 | { | |
55 | __u32 physAddr; /* Physical starting address */ | |
56 | __u32 size; /* Size in bytes */ | |
57 | } boot_info_map_entry_t; | |
58 | ||
59 | ||
60 | /* Here are the boot informations that are passed to the bootstrap | |
61 | * Note that the kernel arguments and the device tree are appended | |
62 | * at the end of this structure. */ | |
63 | typedef struct boot_infos | |
64 | { | |
65 | /* Version of this structure */ | |
66 | __u32 version; | |
67 | /* backward compatible down to version: */ | |
68 | __u32 compatible_version; | |
69 | ||
70 | /* NEW (vers. 2) this holds the current _logical_ base addr of | |
71 | the frame buffer (for use by early boot message) */ | |
72 | __u8* logicalDisplayBase; | |
73 | ||
74 | /* NEW (vers. 4) Apple's machine identification */ | |
75 | __u32 machineID; | |
76 | ||
77 | /* NEW (vers. 4) Detected hw architecture */ | |
78 | __u32 architecture; | |
79 | ||
80 | /* The device tree (internal addresses relative to the beginning of the tree, | |
81 | * device tree offset relative to the beginning of this structure). | |
82 | * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this | |
83 | * field is 0. | |
84 | */ | |
85 | __u32 deviceTreeOffset; /* Device tree offset */ | |
86 | __u32 deviceTreeSize; /* Size of the device tree */ | |
87 | ||
88 | /* Some infos about the current MacOS display */ | |
89 | __u32 dispDeviceRect[4]; /* left,top,right,bottom */ | |
90 | __u32 dispDeviceDepth; /* (8, 16 or 32) */ | |
91 | __u8* dispDeviceBase; /* base address (physical) */ | |
92 | __u32 dispDeviceRowBytes; /* rowbytes (in bytes) */ | |
93 | __u32 dispDeviceColorsOffset; /* Colormap (8 bits only) or 0 (*) */ | |
94 | /* Optional offset in the registry to the current | |
95 | * MacOS display. (Can be 0 when not detected) */ | |
96 | __u32 dispDeviceRegEntryOffset; | |
97 | ||
98 | /* Optional pointer to boot ramdisk (offset from this structure) */ | |
99 | __u32 ramDisk; | |
100 | __u32 ramDiskSize; /* size of ramdisk image */ | |
101 | ||
102 | /* Kernel command line arguments (offset from this structure) */ | |
103 | __u32 kernelParamsOffset; | |
104 | ||
105 | /* ALL BELOW NEW (vers. 4) */ | |
106 | ||
107 | /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag | |
108 | (non-PCI) only. On PCI, memory is contiguous and it's size is in the | |
109 | device-tree. */ | |
110 | boot_info_map_entry_t | |
111 | physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */ | |
112 | __u32 physMemoryMapSize; /* How many entries in map */ | |
113 | ||
114 | ||
115 | /* The framebuffer size (optional, currently 0) */ | |
116 | __u32 frameBufferSize; /* Represents a max size, can be 0. */ | |
117 | ||
118 | /* NEW (vers. 5) */ | |
119 | ||
120 | /* Total params size (args + colormap + device tree + ramdisk) */ | |
121 | __u32 totalParamsSize; | |
122 | ||
123 | } boot_infos_t; | |
124 | ||
125 | /* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index is represented | |
126 | * by 3 short words containing a 16 bits (unsigned) color component. | |
127 | * Later versions may contain the gamma table for direct-color devices here. | |
128 | */ | |
129 | #define BOOTX_COLORTABLE_SIZE (256UL*3UL*2UL) | |
130 | ||
131 | #ifdef macintosh | |
132 | #pragma options align=reset | |
133 | #endif | |
134 | ||
135 | #endif |