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Commit 5bba49f5 authored May 09, 2013 by Vineet Gupta

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



Enforce congruency of userspace shared mappings

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

parent de2a852c

arch/arc/include/asm/Kbuild

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -32,7 +32,6 @@ generic-y += resource.h
	generic-y += scatterlist.h		generic-y += scatterlist.h
	generic-y += sembuf.h		generic-y += sembuf.h
	generic-y += shmbuf.h		generic-y += shmbuf.h
	generic-y += shmparam.h
	generic-y += siginfo.h		generic-y += siginfo.h
	generic-y += socket.h		generic-y += socket.h
	generic-y += sockios.h		generic-y += sockios.h

arch/arc/include/asm/cache.h

+0 −3

Original line number	Original line	Diff line number	Diff line
	@@ -55,9 +55,6 @@
	: "r"(data), "r"(ptr)); \		: "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		#define ARCH_DMA_MINALIGN L1_CACHE_BYTES

	/*		/*

arch/arc/include/asm/cacheflush.h

+1 −0

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

	#include <linux/mm.h>		#include <linux/mm.h>
			#include <asm/shmparam.h>

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

arch/arc/include/asm/pgtable.h

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -395,6 +395,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,

	#include <asm-generic/pgtable.h>		#include <asm-generic/pgtable.h>

			/* to cope with aliasing VIPT cache */
			#define HAVE_ARCH_UNMAPPED_AREA

	/*		/*
	* No page table caches to initialise		* No page table caches to initialise
	*/		*/

arch/arc/include/asm/shmparam.h

0 → 100644

+18 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* 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