bootx.h
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上传日期:2013-02-24
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- /*
- * BK Id: SCCS/s.bootx.h 1.5 05/17/01 18:14:24 cort
- */
- /*
- * This file describes the structure passed from the BootX application
- * (for MacOS) when it is used to boot Linux.
- *
- * Written by Benjamin Herrenschmidt.
- */
- #ifndef __ASM_BOOTX_H__
- #define __ASM_BOOTX_H__
- #ifdef macintosh
- #include <Types.h>
- #include "linux_type_defs.h"
- #endif
- #ifdef macintosh
- /* All this requires PowerPC alignment */
- #pragma options align=power
- #endif
- /* On kernel entry:
- *
- * r3 = 0x426f6f58 ('BooX')
- * r4 = pointer to boot_infos
- * r5 = NULL
- *
- * Data and instruction translation disabled, interrupts
- * disabled, kernel loaded at physical 0x00000000 on PCI
- * machines (will be different on NuBus).
- */
- #define BOOT_INFO_VERSION 5
- #define BOOT_INFO_COMPATIBLE_VERSION 1
- /* Bit in the architecture flag mask. More to be defined in
- future versions. Note that either BOOT_ARCH_PCI or
- BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
- set additionally when BOOT_ARCH_NUBUS is set.
- */
- #define BOOT_ARCH_PCI 0x00000001UL
- #define BOOT_ARCH_NUBUS 0x00000002UL
- #define BOOT_ARCH_NUBUS_PDM 0x00000010UL
- #define BOOT_ARCH_NUBUS_PERFORMA 0x00000020UL
- #define BOOT_ARCH_NUBUS_POWERBOOK 0x00000040UL
- /* Maximum number of ranges in phys memory map */
- #define MAX_MEM_MAP_SIZE 26
- /* This is the format of an element in the physical memory map. Note that
- the map is optional and current BootX will only build it for pre-PCI
- machines */
- typedef struct boot_info_map_entry
- {
- __u32 physAddr; /* Physical starting address */
- __u32 size; /* Size in bytes */
- } boot_info_map_entry_t;
- /* Here are the boot informations that are passed to the bootstrap
- * Note that the kernel arguments and the device tree are appended
- * at the end of this structure. */
- typedef struct boot_infos
- {
- /* Version of this structure */
- __u32 version;
- /* backward compatible down to version: */
- __u32 compatible_version;
-
- /* NEW (vers. 2) this holds the current _logical_ base addr of
- the frame buffer (for use by early boot message) */
- __u8* logicalDisplayBase;
- /* NEW (vers. 4) Apple's machine identification */
- __u32 machineID;
- /* NEW (vers. 4) Detected hw architecture */
- __u32 architecture;
-
- /* The device tree (internal addresses relative to the beginning of the tree,
- * device tree offset relative to the beginning of this structure).
- * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
- * field is 0.
- */
- __u32 deviceTreeOffset; /* Device tree offset */
- __u32 deviceTreeSize; /* Size of the device tree */
-
- /* Some infos about the current MacOS display */
- __u32 dispDeviceRect[4]; /* left,top,right,bottom */
- __u32 dispDeviceDepth; /* (8, 16 or 32) */
- __u8* dispDeviceBase; /* base address (physical) */
- __u32 dispDeviceRowBytes; /* rowbytes (in bytes) */
- __u32 dispDeviceColorsOffset; /* Colormap (8 bits only) or 0 (*) */
- /* Optional offset in the registry to the current
- * MacOS display. (Can be 0 when not detected) */
- __u32 dispDeviceRegEntryOffset;
- /* Optional pointer to boot ramdisk (offset from this structure) */
- __u32 ramDisk;
- __u32 ramDiskSize; /* size of ramdisk image */
-
- /* Kernel command line arguments (offset from this structure) */
- __u32 kernelParamsOffset;
-
- /* ALL BELOW NEW (vers. 4) */
-
- /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
- (non-PCI) only. On PCI, memory is contiguous and it's size is in the
- device-tree. */
- boot_info_map_entry_t
- physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
- __u32 physMemoryMapSize; /* How many entries in map */
-
-
- /* The framebuffer size (optional, currently 0) */
- __u32 frameBufferSize; /* Represents a max size, can be 0. */
-
- /* NEW (vers. 5) */
- /* Total params size (args + colormap + device tree + ramdisk) */
- __u32 totalParamsSize;
- } boot_infos_t;
- /* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index is represented
- * by 3 short words containing a 16 bits (unsigned) color component.
- * Later versions may contain the gamma table for direct-color devices here.
- */
- #define BOOTX_COLORTABLE_SIZE (256UL*3UL*2UL)
- #ifdef macintosh
- #pragma options align=reset
- #endif
- #endif