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Merge up to 2.6.22-rc7
Merge of 2.6.x-xfs-melb:linux:29062a by kenmcd.

/*
 * File:         Documentation/blackfin/cachefeatures.txt
 * Based on:
 * Author:
 *
 * Created:
 * Description:  This file contains the simple DMA Implementation for Blackfin
 *
 * Rev:          $Id: cachefeatures.txt,v 1.3 2007/07/04 15:54:07 tes.longdrop.melbourne.sgi.com Exp $
 *
 * Modified:
 *               Copyright 2004-2006 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 */

	- Instruction and Data cache initialization.
		icache_init();
		dcache_init();

	-  Instruction and Data cache Invalidation Routines, when flushing the
	   same is not required.
		_icache_invalidate();
		_dcache_invalidate();

	Also, for invalidating the entire instruction and data cache, the below
	routines are provided (another method for invalidation, refer page no 267 and 287 of
	ADSP-BF533 Hardware Reference manual)

		invalidate_entire_dcache();
		invalidate_entire_icache();

	-External Flushing of Instruction and data cache routines.

		flush_instruction_cache();
		flush_data_cache();

	- Internal Flushing of Instruction and Data Cache.

		icplb_flush();
		dcplb_flush();

	- Locking the cache.

		cache_grab_lock();
		cache_lock();

	Please refer linux-2.6.x/Documentation/blackfin/cache-lock.txt for how to
	lock the cache.

	Locking the cache is optional feature.

	- Miscellaneous cache functions.

		flush_cache_all();
		flush_cache_mm();
		invalidate_dcache_range();
		flush_dcache_range();
		flush_dcache_page();
		flush_cache_range();
		flush_cache_page();
		invalidate_dcache_range();
		flush_page_to_ram();