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sh: Split out SH-4 __flush_xxx_region() ops.

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This splits out the SH-4 __flush_xxx_region() functions and defines them
as weak symbols. This allows us to provide optimized versions without
having to ifdef cache-sh4.c to death.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-08-04 18:06:01 +09:00
parent d14d751ff9
commit 8174252752
3 changed files with 64 additions and 61 deletions
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2
arch/sh/mm/Makefile_32
View file

@ -8,7 +8,7 @@ ifndef CONFIG_CACHE_OFF
cache-$(CONFIG_CPU_SH2) := cache-sh2.o
cache-$(CONFIG_CPU_SH2A) := cache-sh2a.o
cache-$(CONFIG_CPU_SH3) := cache-sh3.o
cache-$(CONFIG_CPU_SH4) := cache-sh4.o
cache-$(CONFIG_CPU_SH4) := cache-sh4.o flush-sh4.o
cache-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
endif

60
arch/sh/mm/cache-sh4.c
View file

@ -118,66 +118,6 @@ void __init p3_cache_init(void)
emit_cache_params();
}
/*
* Write back the dirty D-caches, but not invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
void __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) {
asm volatile("ocbwb %0"
: /* no output */
: "m" (__m(v)));
}
}
/*
* 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) {
asm volatile("ocbp %0"
: /* no output */
: "m" (__m(v)));
}
}
/*
* No write back please
*/
void __flush_invalidate_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) {
asm volatile("ocbi %0"
: /* no output */
: "m" (__m(v)));
}
}
/*
* Write back the range of D-cache, and purge the I-cache.
*

63
arch/sh/mm/flush-sh4.c Normal file
View file

@ -0,0 +1,63 @@
#include <linux/mm.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
/*
* Write back the dirty D-caches, but not invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
void __weak __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) {
asm volatile("ocbwb %0"
: /* no output */
: "m" (__m(v)));
}
}
/*
* Write back the dirty D-caches and invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
void __weak __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) {
asm volatile("ocbp %0"
: /* no output */
: "m" (__m(v)));
}
}
/*
* No write back please
*/
void __weak __flush_invalidate_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) {
asm volatile("ocbi %0"
: /* no output */
: "m" (__m(v)));
}
}