101 строка
2.4 KiB
C
101 строка
2.4 KiB
C
/*
|
|
* arch/sh/mm/cache-sh3.c
|
|
*
|
|
* Copyright (C) 1999, 2000 Niibe Yutaka
|
|
* Copyright (C) 2002 Paul Mundt
|
|
*
|
|
* Released under the terms of the GNU GPL v2.0.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/threads.h>
|
|
#include <asm/addrspace.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/io.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/cacheflush.h>
|
|
|
|
/*
|
|
* Write back the dirty D-caches, but not invalidate them.
|
|
*
|
|
* Is this really worth it, or should we just alias this routine
|
|
* to __flush_purge_region too?
|
|
*
|
|
* START: Virtual Address (U0, P1, or P3)
|
|
* SIZE: Size of the region.
|
|
*/
|
|
|
|
void __flush_wback_region(void *start, int size)
|
|
{
|
|
unsigned long v, j;
|
|
unsigned long begin, end;
|
|
unsigned long flags;
|
|
|
|
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 addrstart = CACHE_OC_ADDRESS_ARRAY;
|
|
for (j = 0; j < current_cpu_data.dcache.ways; j++) {
|
|
unsigned long data, addr, p;
|
|
|
|
p = __pa(v);
|
|
addr = addrstart | (v & current_cpu_data.dcache.entry_mask);
|
|
local_irq_save(flags);
|
|
data = ctrl_inl(addr);
|
|
|
|
if ((data & CACHE_PHYSADDR_MASK) ==
|
|
(p & CACHE_PHYSADDR_MASK)) {
|
|
data &= ~SH_CACHE_UPDATED;
|
|
ctrl_outl(data, addr);
|
|
local_irq_restore(flags);
|
|
break;
|
|
}
|
|
local_irq_restore(flags);
|
|
addrstart += current_cpu_data.dcache.way_incr;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Write back the dirty D-caches and invalidate them.
|
|
*
|
|
* START: Virtual Address (U0, P1, or P3)
|
|
* SIZE: Size of the region.
|
|
*/
|
|
void __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) {
|
|
unsigned long data, addr;
|
|
|
|
data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */
|
|
addr = CACHE_OC_ADDRESS_ARRAY |
|
|
(v & current_cpu_data.dcache.entry_mask) | SH_CACHE_ASSOC;
|
|
ctrl_outl(data, addr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* No write back please
|
|
*
|
|
* Except I don't think there's any way to avoid the writeback. So we
|
|
* just alias it to __flush_purge_region(). dwmw2.
|
|
*/
|
|
void __flush_invalidate_region(void *start, int size)
|
|
__attribute__((alias("__flush_purge_region")));
|