blob: 60a3c9ef3017818897ac689d43c3db2b35e7eac9 [file] [log] [blame]
* 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__
#include <linux/types.h>
#ifdef macintosh
#include <Types.h>
#include "linux_type_defs.h"
#ifdef macintosh
/* All this requires PowerPC alignment */
#pragma options align=power
/* 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).
/* 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
/* 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. */
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;
#ifdef __KERNEL__
/* (*) 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.
/* BootX passes the device-tree using a format that comes from earlier
* ppc32 kernels. This used to match what is in prom.h, but not anymore
* so we now define it here
struct bootx_dt_prop {
u32 name;
int length;
u32 value;
u32 next;
struct bootx_dt_node {
u32 unused0;
u32 unused1;
u32 phandle; /* not really available */
u32 unused2;
u32 unused3;
u32 unused4;
u32 unused5;
u32 full_name;
u32 properties;
u32 parent;
u32 child;
u32 sibling;
u32 next;
u32 allnext;
extern void bootx_init(unsigned long r4, unsigned long phys);
#endif /* __KERNEL__ */
#ifdef macintosh
#pragma options align=reset