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#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#ifdef __KERNEL__ 128/* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index 129 * is represented by 3 short words containing a 16 bits (unsigned) color 130 * component. Later versions may contain the gamma table for direct-color 131 * devices here. 132 */ 133#define BOOTX_COLORTABLE_SIZE (256UL*3UL*2UL) 134 135/* BootX passes the device-tree using a format that comes from earlier 136 * ppc32 kernels. This used to match what is in prom.h, but not anymore 137 * so we now define it here 138 */ 139struct bootx_dt_prop { 140 u32 name; 141 int length; 142 u32 value; 143 u32 next; 144}; 145 146struct bootx_dt_node { 147 u32 unused0; 148 u32 unused1; 149 u32 phandle; /* not really available */ 150 u32 unused2; 151 u32 unused3; 152 u32 unused4; 153 u32 unused5; 154 u32 full_name; 155 u32 properties; 156 u32 parent; 157 u32 child; 158 u32 sibling; 159 u32 next; 160 u32 allnext; 161}; 162 163extern void bootx_init(unsigned long r4, unsigned long phys); 164 165#endif /* __KERNEL__ */ 166 167#ifdef macintosh 168#pragma options align=reset 169#endif 170 171#endif 172