Commit 3c1fbd51 authored by Mike Frysinger's avatar Mike Frysinger Committed by Bryan Wu

Blackfin arch: rewrite blackfin_invalidate_entire_dcache function

rewrite blackfin_invalidate_entire_dcache() in C for easier management,
better optimization, and so we take all SSYNC anomalies into account
Signed-off-by: default avatarMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent fe85cad2
...@@ -3,7 +3,7 @@ ...@@ -3,7 +3,7 @@
# #
obj-y := \ obj-y := \
cache.o entry.o head.o \ cache.o cache-c.o entry.o head.o \
interrupt.o irqpanic.o arch_checks.o ints-priority.o interrupt.o irqpanic.o arch_checks.o ints-priority.o
obj-$(CONFIG_BFIN_ICACHE_LOCK) += lock.o obj-$(CONFIG_BFIN_ICACHE_LOCK) += lock.o
......
/*
* Blackfin cache control code (simpler control-style functions)
*
* Copyright 2004-2008 Analog Devices Inc.
*
* Enter bugs at http://blackfin.uclinux.org/
*
* Licensed under the GPL-2 or later.
*/
#include <asm/blackfin.h>
/* Invalidate the Entire Data cache by
* clearing DMC[1:0] bits
*/
void blackfin_invalidate_entire_dcache(void)
{
u32 dmem = bfin_read_DMEM_CONTROL();
SSYNC();
bfin_write_DMEM_CONTROL(dmem & ~0xc);
SSYNC();
bfin_write_DMEM_CONTROL(dmem);
SSYNC();
}
...@@ -97,39 +97,3 @@ ENTRY(_blackfin_dflush_page) ...@@ -97,39 +97,3 @@ ENTRY(_blackfin_dflush_page)
P1 = 1 << (PAGE_SHIFT - L1_CACHE_SHIFT); P1 = 1 << (PAGE_SHIFT - L1_CACHE_SHIFT);
jump .Ldfr; jump .Ldfr;
ENDPROC(_blackfin_dflush_page) ENDPROC(_blackfin_dflush_page)
/* Invalidate the Entire Data cache by
* clearing DMC[1:0] bits
*/
ENTRY(_blackfin_invalidate_entire_dcache)
[--SP] = ( R7:5);
P0.L = LO(DMEM_CONTROL);
P0.H = HI(DMEM_CONTROL);
R7 = [P0];
R5 = R7; /* Save DMEM_CNTR */
/* Clear the DMC[1:0] bits, All valid bits in the data
* cache are set to the invalid state
*/
BITCLR(R7,DMC0_P);
BITCLR(R7,DMC1_P);
CLI R6;
SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
.align 8;
[P0] = R7;
SSYNC;
STI R6;
/* Configures the data cache again */
CLI R6;
SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
.align 8;
[P0] = R5;
SSYNC;
STI R6;
( R7:5) = [SP++];
RTS;
ENDPROC(_blackfin_invalidate_entire_dcache)
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