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