157 lines
4.5 KiB
C
157 lines
4.5 KiB
C
/* Functions for global dcache flush when writeback 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_dcache_flush - Globally flush data cache
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*
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* Flush the data cache on all CPUs.
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*/
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void mn10300_dcache_flush(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_flush();
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smp_cache_call(SMP_DCACHE_FLUSH, 0, 0);
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smp_unlock_cache(flags);
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}
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/**
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* mn10300_dcache_flush_page - Globally flush a page of data cache
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* @start: The address of the page of memory to be flushed.
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*
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* Flush a range of addresses in the data cache on all CPUs covering
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* the page that includes the given address.
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*/
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void mn10300_dcache_flush_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_flush_page(start);
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smp_cache_call(SMP_DCACHE_FLUSH_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_flush_range - Globally flush range of data cache
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* @start: The start address of the region to be flushed.
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* @end: The end address of the region to be flushed.
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*
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* Flush a range of addresses in the data cache on all CPUs, between start and
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* end-1 inclusive.
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*/
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void mn10300_dcache_flush_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_flush_range(start, end);
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smp_cache_call(SMP_DCACHE_FLUSH_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_flush_range2 - Globally flush range of data cache
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* @start: The start address of the region to be flushed.
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* @size: The size of the region to be flushed.
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*
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* Flush a range of addresses in the data cache on all CPUs, between start and
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* start+size-1 inclusive.
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*/
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void mn10300_dcache_flush_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_flush_range2(start, size);
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smp_cache_call(SMP_DCACHE_FLUSH_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_flush_inv - Globally flush and invalidate data cache
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*
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* Flush and invalidate the data cache on all CPUs.
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*/
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void mn10300_dcache_flush_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_flush_inv();
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smp_cache_call(SMP_DCACHE_FLUSH_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_flush_inv_page - Globally flush and invalidate a page of data
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* cache
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* @start: The address of the page of memory to be flushed and invalidated.
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*
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* Flush and invalidate a range of addresses in the data 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_dcache_flush_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_flush_inv_page(start);
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smp_cache_call(SMP_DCACHE_FLUSH_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_flush_inv_range - Globally flush and invalidate range of data
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* cache
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* @start: The start address of the region to be flushed and invalidated.
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* @end: The end address of the region to be flushed and invalidated.
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*
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* Flush and invalidate a range of addresses in the data cache on all CPUs,
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* between start and end-1 inclusive.
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*/
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void mn10300_dcache_flush_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_flush_inv_range(start, end);
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smp_cache_call(SMP_DCACHE_FLUSH_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_flush_inv_range2 - Globally flush and invalidate range of data
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* cache
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* @start: The start address of the region to be flushed and invalidated.
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* @size: The size of the region to be flushed and invalidated.
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*
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* Flush and invalidate a range of addresses in the data 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_dcache_flush_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_flush_inv_range2(start, size);
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smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, start + size);
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smp_unlock_cache(flags);
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}
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