// SPDX-License-Identifier: GPL-2.0-only
/*
* arch / sh / mm / cache - sh2 . c
*
* Copyright ( C ) 2002 Paul Mundt
* Copyright ( C ) 2008 Yoshinori Sato
*/
#include <linux/init.h>
#include <linux/mm.h>
#include <asm /cache.h>
#include <asm /addrspace.h>
#include <asm /processor.h>
#include <asm /cacheflush.h>
#include <asm /io.h>
static void sh2__flush_wback_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
begin = (unsigned long )start & ~(L1_CACHE_BYTES-1 );
end = ((unsigned long )start + size + L1_CACHE_BYTES-1 )
& ~(L1_CACHE_BYTES-1 );
for (v = begin; v < end; v+=L1_CACHE_BYTES) {
unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0 x00000ff0);
int way;
for (way = 0 ; way < 4 ; way++) {
unsigned long data = __raw_readl(addr | (way << 12 ));
if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
data &= ~SH_CACHE_UPDATED;
__raw_writel(data, addr | (way << 12 ));
}
}
}
}
static void sh2__flush_purge_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
begin = (unsigned long )start & ~(L1_CACHE_BYTES-1 );
end = ((unsigned long )start + size + L1_CACHE_BYTES-1 )
& ~(L1_CACHE_BYTES-1 );
for (v = begin; v < end; v+=L1_CACHE_BYTES)
__raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_OC_ADDRESS_ARRAY | (v & 0 x00000ff0) | 0 x00000008);
}
static void sh2__flush_invalidate_region(void *start, int size)
{
#ifdef CONFIG_CACHE_WRITEBACK
/*
* SH - 2 does not support individual line invalidation , only a
* global invalidate .
*/
unsigned long ccr;
unsigned long flags;
local_irq_save(flags);
jump_to_uncached();
ccr = __raw_readl(SH_CCR);
ccr |= CCR_CACHE_INVALIDATE;
__raw_writel(ccr, SH_CCR);
back_to_cached();
local_irq_restore(flags);
#else
unsigned long v;
unsigned long begin, end;
begin = (unsigned long )start & ~(L1_CACHE_BYTES-1 );
end = ((unsigned long )start + size + L1_CACHE_BYTES-1 )
& ~(L1_CACHE_BYTES-1 );
for (v = begin; v < end; v+=L1_CACHE_BYTES)
__raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_OC_ADDRESS_ARRAY | (v & 0 x00000ff0) | 0 x00000008);
#endif
}
void __init sh2_cache_init(void )
{
__flush_wback_region = sh2__flush_wback_region;
__flush_purge_region = sh2__flush_purge_region;
__flush_invalidate_region = sh2__flush_invalidate_region;
}
Messung V0.5 in Prozent C=97 H=69 G=83
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-10-01)
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