Commit 5bba49f5 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARC: [mm] Aliasing VIPT dcache support 4/4 



Enforce congruency of userspace shared mappings

Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent de2a852c

arch/arc/include/asm/Kbuild

+0 −1
Original line number Diff line number Diff line
@@ -32,7 +32,6 @@ generic-y += resource.h 
generic-y += scatterlist.h

generic-y += sembuf.h

generic-y += shmbuf.h

generic-y += shmparam.h

generic-y += siginfo.h

generic-y += socket.h

generic-y += sockios.h

arch/arc/include/asm/cache.h

+0 −3
Original line number Diff line number Diff line
@@ -55,9 +55,6 @@ 
	: "r"(data), "r"(ptr));		\

})



/* used to give SHMLBA a value to avoid Cache Aliasing */

extern unsigned int ARC_shmlba;



#define ARCH_DMA_MINALIGN      L1_CACHE_BYTES



/*

arch/arc/include/asm/cacheflush.h

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#define _ASM_CACHEFLUSH_H



#include <linux/mm.h>

#include <asm/shmparam.h>



/*

 * Semantically we need this because icache doesn't snoop dcache/dma.

arch/arc/include/asm/pgtable.h

+3 −0
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@@ -395,6 +395,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, 


#include <asm-generic/pgtable.h>



/* to cope with aliasing VIPT cache */

#define HAVE_ARCH_UNMAPPED_AREA



/*

 * No page table caches to initialise

 */

arch/arc/include/asm/shmparam.h

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+18 −0
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/*

 * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#ifndef __ARC_ASM_SHMPARAM_H

#define __ARC_ASM_SHMPARAM_H



/* Handle upto 2 cache bins */

#define	SHMLBA	(2 * PAGE_SIZE)



/* Enforce SHMLBA in shmat */

#define __ARCH_FORCE_SHMLBA



#endif