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131 lines
4.6 KiB
C
131 lines
4.6 KiB
C
/*
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* This file describes the structure passed from the BootX application
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* (for MacOS) when it is used to boot Linux.
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*
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* Written by Benjamin Herrenschmidt.
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* Modified by Laurent Vivier
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*/
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#ifndef __BOOTX_H__
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#define __BOOTX_H__
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#include <macos/types.h>
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#include "misc.h"
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/* On kernel entry:
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*
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* r3 = 0x426f6f58 ('BooX')
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* r4 = pointer to boot_infos
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* r5 = NULL
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*
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* Data and instruction translation disabled, interrupts
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* disabled, kernel loaded at physical 0x00000000 on PCI
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* machines (will be different on NuBus).
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*/
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#define BOOT_INFO_VERSION 5
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#define BOOT_INFO_COMPATIBLE_VERSION 1
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/* Bit in the architecture flag mask. More to be defined in
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future versions. Note that either BOOT_ARCH_PCI or
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BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
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set additionally when BOOT_ARCH_NUBUS is set.
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*/
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#define BOOT_ARCH_PCI 0x00000001UL
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#define BOOT_ARCH_NUBUS 0x00000002UL
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#define BOOT_ARCH_NUBUS_CLASS 0x00000070UL
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#define BOOT_ARCH_NUBUS_PDM 0x00000010UL
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#define BOOT_ARCH_NUBUS_PERFORMA 0x00000020UL
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#define BOOT_ARCH_NUBUS_POWERBOOK 0x00000040UL
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/* Maximum number of ranges in phys memory map */
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#define MAX_MEM_MAP_SIZE 26
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/* This is the format of an element in the physical memory map. Note that
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the map is optional and current BootX will only build it for pre-PCI
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machines */
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typedef struct boot_info_map_entry
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{
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u_int32_t physAddr; /* Physical starting address */
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u_int32_t size; /* Size in bytes */
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} boot_info_map_entry_t;
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/* Here are the boot informations that are passed to the bootstrap
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* Note that the kernel arguments and the device tree are appended
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* at the end of this structure. */
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typedef struct boot_infos
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{
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/* Version of this structure */
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u_int32_t version;
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/* backward compatible down to version: */
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u_int32_t compatible_version;
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/* NEW (vers. 2) this holds the current _logical_ base addr of
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the frame buffer (for use by early boot message) */
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u_int8_t* logicalDisplayBase;
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/* NEW (vers. 4) Apple's machine identification */
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u_int32_t machineID;
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/* NEW (vers. 4) Detected hw architecture */
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u_int32_t architecture;
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/* The device tree (internal addresses relative to the beginning of the tree,
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* device tree offset relative to the beginning of this structure).
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* On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
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* field is 0.
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*/
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u_int32_t deviceTreeOffset; /* Device tree offset */
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u_int32_t deviceTreeSize; /* Size of the device tree */
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/* Some infos about the current MacOS display */
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u_int32_t dispDeviceRect[4]; /* left,top,right,bottom */
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u_int32_t dispDeviceDepth; /* (8, 16 or 32) */
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u_int8_t* dispDeviceBase; /* base address (physical) */
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u_int32_t dispDeviceRowBytes; /* rowbytes (in bytes) */
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u_int32_t dispDeviceColorsOffset; /* Colormap (8 bits only) or 0 (*) */
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/* Optional offset in the registry to the current
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* MacOS display. (Can be 0 when not detected) */
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u_int32_t dispDeviceRegEntryOffset;
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/* Optional pointer to boot ramdisk (offset from this structure) */
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u_int32_t ramDisk;
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u_int32_t ramDiskSize; /* size of ramdisk image */
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/* Kernel command line arguments (offset from this structure) */
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u_int32_t kernelParamsOffset;
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/* ALL BELOW NEW (vers. 4) */
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/* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
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(non-PCI) only. On PCI, memory is contiguous and it's size is in the
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device-tree. */
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boot_info_map_entry_t
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physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
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u_int32_t physMemoryMapSize; /* How many entries in map */
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/* The framebuffer size (optional, currently 0) */
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u_int32_t frameBufferSize; /* Represents a max size, can be 0. */
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/* NEW (vers. 5) */
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/* Total params size (args + colormap + device tree + ramdisk) */
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u_int32_t totalParamsSize;
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} boot_infos_t;
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/* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index is represented
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* by 3 short words containing a 16 bits (unsigned) color component.
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* Later versions may contain the gamma table for direct-color devices here.
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*/
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#define BOOTX_COLORTABLE_SIZE (256UL*3UL*2UL)
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extern struct boot_infos bootx_infos;
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extern void bootx_init(char* command_line, char* ramdisk_start, unsigned long ramdisk_size);
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#endif
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