| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |