1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * This file describes the structure passed from the BootX application 4 * (for MacOS) when it is used to boot Linux. 5 * 6 * Written by Benjamin Herrenschmidt. 7 */ 8 9 10 #ifndef _UAPI__ASM_BOOTX_H__ 11 #define _UAPI__ASM_BOOTX_H__ 12 13 #include <linux/types.h> 14 15 #ifdef macintosh 16 #include <Types.h> 17 #include "linux_type_defs.h" 18 #endif 19 20 #ifdef macintosh 21 /* All this requires PowerPC alignment */ 22 #pragma options align=power 23 #endif 24 25 /* On kernel entry: 26 * 27 * r3 = 0x426f6f58 ('BooX') 28 * r4 = pointer to boot_infos 29 * r5 = NULL 30 * 31 * Data and instruction translation disabled, interrupts 32 * disabled, kernel loaded at physical 0x00000000 on PCI 33 * machines (will be different on NuBus). 34 */ 35 36 #define BOOT_INFO_VERSION 5 37 #define BOOT_INFO_COMPATIBLE_VERSION 1 38 39 /* Bit in the architecture flag mask. More to be defined in 40 future versions. Note that either BOOT_ARCH_PCI or 41 BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are 42 set additionally when BOOT_ARCH_NUBUS is set. 43 */ 44 #define BOOT_ARCH_PCI 0x00000001UL 45 #define BOOT_ARCH_NUBUS 0x00000002UL 46 #define BOOT_ARCH_NUBUS_PDM 0x00000010UL 47 #define BOOT_ARCH_NUBUS_PERFORMA 0x00000020UL 48 #define BOOT_ARCH_NUBUS_POWERBOOK 0x00000040UL 49 50 /* Maximum number of ranges in phys memory map */ 51 #define MAX_MEM_MAP_SIZE 26 52 53 /* This is the format of an element in the physical memory map. Note that 54 the map is optional and current BootX will only build it for pre-PCI 55 machines */ 56 typedef struct boot_info_map_entry 57 { 58 __u32 physAddr; /* Physical starting address */ 59 __u32 size; /* Size in bytes */ 60 } boot_info_map_entry_t; 61 62 63 /* Here are the boot informations that are passed to the bootstrap 64 * Note that the kernel arguments and the device tree are appended 65 * at the end of this structure. */ 66 typedef struct boot_infos 67 { 68 /* Version of this structure */ 69 __u32 version; 70 /* backward compatible down to version: */ 71 __u32 compatible_version; 72 73 /* NEW (vers. 2) this holds the current _logical_ base addr of 74 the frame buffer (for use by early boot message) */ 75 __u8* logicalDisplayBase; 76 77 /* NEW (vers. 4) Apple's machine identification */ 78 __u32 machineID; 79 80 /* NEW (vers. 4) Detected hw architecture */ 81 __u32 architecture; 82 83 /* The device tree (internal addresses relative to the beginning of the tree, 84 * device tree offset relative to the beginning of this structure). 85 * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this 86 * field is 0. 87 */ 88 __u32 deviceTreeOffset; /* Device tree offset */ 89 __u32 deviceTreeSize; /* Size of the device tree */ 90 91 /* Some infos about the current MacOS display */ 92 __u32 dispDeviceRect[4]; /* left,top,right,bottom */ 93 __u32 dispDeviceDepth; /* (8, 16 or 32) */ 94 __u8* dispDeviceBase; /* base address (physical) */ 95 __u32 dispDeviceRowBytes; /* rowbytes (in bytes) */ 96 __u32 dispDeviceColorsOffset; /* Colormap (8 bits only) or 0 (*) */ 97 /* Optional offset in the registry to the current 98 * MacOS display. (Can be 0 when not detected) */ 99 __u32 dispDeviceRegEntryOffset; 100 101 /* Optional pointer to boot ramdisk (offset from this structure) */ 102 __u32 ramDisk; 103 __u32 ramDiskSize; /* size of ramdisk image */ 104 105 /* Kernel command line arguments (offset from this structure) */ 106 __u32 kernelParamsOffset; 107 108 /* ALL BELOW NEW (vers. 4) */ 109 110 /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag 111 (non-PCI) only. On PCI, memory is contiguous and its size is in the 112 device-tree. */ 113 boot_info_map_entry_t 114 physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */ 115 __u32 physMemoryMapSize; /* How many entries in map */ 116 117 118 /* The framebuffer size (optional, currently 0) */ 119 __u32 frameBufferSize; /* Represents a max size, can be 0. */ 120 121 /* NEW (vers. 5) */ 122 123 /* Total params size (args + colormap + device tree + ramdisk) */ 124 __u32 totalParamsSize; 125 126 } boot_infos_t; 127 128 129 #ifdef macintosh 130 #pragma options align=reset 131 #endif 132 133 #endif /* _UAPI__ASM_BOOTX_H__ */ 134