EMILE/second/bootx.h

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/*
* This file describes the structure passed from the BootX application
* (for MacOS) when it is used to boot Linux.
*
* Written by Benjamin Herrenschmidt.
* Modified by Laurent Vivier
*/
#ifndef __BOOTX_H__
#define __BOOTX_H__
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#include <macos/types.h>
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#include "misc.h"
/* 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_CLASS 0x00000070UL
#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
{
u_int32_t physAddr; /* Physical starting address */
u_int32_t 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 */
u_int32_t version;
/* backward compatible down to version: */
u_int32_t compatible_version;
/* NEW (vers. 2) this holds the current _logical_ base addr of
the frame buffer (for use by early boot message) */
u_int8_t* logicalDisplayBase;
/* NEW (vers. 4) Apple's machine identification */
u_int32_t machineID;
/* NEW (vers. 4) Detected hw architecture */
u_int32_t 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.
*/
u_int32_t deviceTreeOffset; /* Device tree offset */
u_int32_t deviceTreeSize; /* Size of the device tree */
/* Some infos about the current MacOS display */
u_int32_t dispDeviceRect[4]; /* left,top,right,bottom */
u_int32_t dispDeviceDepth; /* (8, 16 or 32) */
u_int8_t* dispDeviceBase; /* base address (physical) */
u_int32_t dispDeviceRowBytes; /* rowbytes (in bytes) */
u_int32_t dispDeviceColorsOffset; /* Colormap (8 bits only) or 0 (*) */
/* Optional offset in the registry to the current
* MacOS display. (Can be 0 when not detected) */
u_int32_t dispDeviceRegEntryOffset;
/* Optional pointer to boot ramdisk (offset from this structure) */
u_int32_t ramDisk;
u_int32_t ramDiskSize; /* size of ramdisk image */
/* Kernel command line arguments (offset from this structure) */
u_int32_t 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 */
u_int32_t physMemoryMapSize; /* How many entries in map */
/* The framebuffer size (optional, currently 0) */
u_int32_t frameBufferSize; /* Represents a max size, can be 0. */
/* NEW (vers. 5) */
/* Total params size (args + colormap + device tree + ramdisk) */
u_int32_t totalParamsSize;
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} 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)
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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);
#endif