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 136