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2008 jermar 1
/*
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 * Copyright (c) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch/arch.h>
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#define DCACHE_SIZE		(16 * 1024)
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#define DCACHE_LINE_SIZE	32	
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#define DCACHE_TAG_SHIFT	2
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.register %g2, #scratch
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.register %g3, #scratch
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/** Flush the whole D-cache. */
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.global dcache_flush
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dcache_flush:
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	set (DCACHE_SIZE - DCACHE_LINE_SIZE), %g1
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	stxa %g0, [%g1] ASI_DCACHE_TAG
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0:	membar #Sync
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	subcc %g1, DCACHE_LINE_SIZE, %g1
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	bnz,pt %xcc, 0b
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	stxa %g0, [%g1] ASI_DCACHE_TAG
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	membar #Sync			
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	retl
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	! beware SF Erratum #51, do not put the MEMBAR here
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	nop				
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/** Flush only D-cache lines of one virtual color.
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 *
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 * @param o0	Virtual color to be flushed.
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 */
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.global dcache_flush_color
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dcache_flush_color:
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	mov (DCACHE_SIZE / DCACHE_LINE_SIZE) / 2, %g1
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	set DCACHE_SIZE / 2, %g2
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	sllx %g2, %o0, %g2
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	sub %g2, DCACHE_LINE_SIZE, %g2
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0:	stxa %g0, [%g2] ASI_DCACHE_TAG
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	membar #Sync
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	subcc %g1, 1, %g1
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	bnz,pt %xcc, 0b
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	sub %g2, DCACHE_LINE_SIZE, %g2
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	retl
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	nop
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/** Flush only D-cache lines of one virtual color and one tag.
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 *
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 * @param o0	Virtual color to lookup the tag.
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 * @param o1	Tag of the cachelines to be flushed.
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 */
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.global dcache_flush_tag
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dcache_flush_tag:
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	mov (DCACHE_SIZE / DCACHE_LINE_SIZE) / 2, %g1
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	set DCACHE_SIZE / 2, %g2
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	sllx %g2, %o0, %g2
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	sub %g2, DCACHE_LINE_SIZE, %g2
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0:	ldxa [%g2] ASI_DCACHE_TAG, %g3
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	srlx %g3, DCACHE_TAG_SHIFT, %g3
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	cmp %g3, %o1
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	bnz 1f
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	nop
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	stxa %g0, [%g2] ASI_DCACHE_TAG
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	membar #Sync
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1:	subcc %g1, 1, %g1
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	bnz,pt %xcc, 0b
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	sub %g2, DCACHE_LINE_SIZE, %g2
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	retl
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	nop