forked from Minki/linux
8be0628923
Implement SMP global cache flushing for MN10300. This will be used by the AM34 which is SMP capable. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com>
154 lines
4.3 KiB
C
154 lines
4.3 KiB
C
/* Functions for global i/dcache invalidation when caching in SMP
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*
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* Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/mm.h>
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#include <asm/cacheflush.h>
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#include "cache-smp.h"
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/**
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* mn10300_icache_inv - Globally invalidate instruction cache
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*
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* Invalidate the instruction cache on all CPUs.
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*/
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void mn10300_icache_inv(void)
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{
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unsigned long flags;
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flags = smp_lock_cache();
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mn10300_local_icache_inv();
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smp_cache_call(SMP_ICACHE_INV, 0, 0);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_icache_inv_page - Globally invalidate a page of instruction cache
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* @start: The address of the page of memory to be invalidated.
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*
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* Invalidate a range of addresses in the instruction cache on all CPUs
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* covering the page that includes the given address.
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*/
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void mn10300_icache_inv_page(unsigned long start)
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{
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unsigned long flags;
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start &= ~(PAGE_SIZE-1);
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flags = smp_lock_cache();
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mn10300_local_icache_inv_page(start);
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smp_cache_call(SMP_ICACHE_INV_RANGE, start, start + PAGE_SIZE);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_icache_inv_range - Globally invalidate range of instruction cache
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* @start: The start address of the region to be invalidated.
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* @end: The end address of the region to be invalidated.
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*
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* Invalidate a range of addresses in the instruction cache on all CPUs,
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* between start and end-1 inclusive.
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*/
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void mn10300_icache_inv_range(unsigned long start, unsigned long end)
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{
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unsigned long flags;
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flags = smp_lock_cache();
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mn10300_local_icache_inv_range(start, end);
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smp_cache_call(SMP_ICACHE_INV_RANGE, start, end);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_icache_inv_range2 - Globally invalidate range of instruction cache
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* @start: The start address of the region to be invalidated.
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* @size: The size of the region to be invalidated.
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*
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* Invalidate a range of addresses in the instruction cache on all CPUs,
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* between start and start+size-1 inclusive.
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*/
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void mn10300_icache_inv_range2(unsigned long start, unsigned long size)
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{
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unsigned long flags;
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flags = smp_lock_cache();
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mn10300_local_icache_inv_range2(start, size);
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smp_cache_call(SMP_ICACHE_INV_RANGE, start, start + size);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_dcache_inv - Globally invalidate data cache
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*
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* Invalidate the data cache on all CPUs.
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*/
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void mn10300_dcache_inv(void)
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{
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unsigned long flags;
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flags = smp_lock_cache();
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mn10300_local_dcache_inv();
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smp_cache_call(SMP_DCACHE_INV, 0, 0);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_dcache_inv_page - Globally invalidate a page of data cache
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* @start: The address of the page of memory to be invalidated.
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*
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* Invalidate a range of addresses in the data cache on all CPUs covering the
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* page that includes the given address.
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*/
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void mn10300_dcache_inv_page(unsigned long start)
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{
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unsigned long flags;
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start &= ~(PAGE_SIZE-1);
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flags = smp_lock_cache();
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mn10300_local_dcache_inv_page(start);
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smp_cache_call(SMP_DCACHE_INV_RANGE, start, start + PAGE_SIZE);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_dcache_inv_range - Globally invalidate range of data cache
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* @start: The start address of the region to be invalidated.
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* @end: The end address of the region to be invalidated.
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*
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* Invalidate a range of addresses in the data cache on all CPUs, between start
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* and end-1 inclusive.
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*/
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void mn10300_dcache_inv_range(unsigned long start, unsigned long end)
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{
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unsigned long flags;
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flags = smp_lock_cache();
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mn10300_local_dcache_inv_range(start, end);
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smp_cache_call(SMP_DCACHE_INV_RANGE, start, end);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_dcache_inv_range2 - Globally invalidate range of data cache
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* @start: The start address of the region to be invalidated.
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* @size: The size of the region to be invalidated.
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*
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* Invalidate a range of addresses in the data cache on all CPUs, between start
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* and start+size-1 inclusive.
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*/
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void mn10300_dcache_inv_range2(unsigned long start, unsigned long size)
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{
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unsigned long flags;
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flags = smp_lock_cache();
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mn10300_local_dcache_inv_range2(start, size);
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smp_cache_call(SMP_DCACHE_INV_RANGE, start, start + size);
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smp_unlock_cache(flags);
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}
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