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authorKumar Gala <galak@kernel.crashing.org>2008-09-22 14:11:11 -0500
committerWolfgang Denk <wd@denx.de>2008-10-18 21:54:04 +0200
commit7c0d4a7508d252d2d7c137eeb376814132dda30f (patch)
tree305460a7a5f0d9c30ea94b7e6382129a9900750e /board/freescale/mpc8536ds/mpc8536ds.c
parent54e091d3b603a3332c619199ca83a07e95960da4 (diff)
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85xx: Improve flash remapping on MPC8572DS & MPC8536DS
Changing the flash from cacheable to cache-inhibited was taking a significant amount of time due to the fact that we were iterating over the full 256M of flash. Instead we can just flush the L1 d-cache and invalidate the i-cache. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'board/freescale/mpc8536ds/mpc8536ds.c')
-rw-r--r--board/freescale/mpc8536ds/mpc8536ds.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/board/freescale/mpc8536ds/mpc8536ds.c b/board/freescale/mpc8536ds/mpc8536ds.c
index f634e17..5b252d1 100644
--- a/board/freescale/mpc8536ds/mpc8536ds.c
+++ b/board/freescale/mpc8536ds/mpc8536ds.c
@@ -25,6 +25,7 @@
#include <pci.h>
#include <asm/processor.h>
#include <asm/mmu.h>
+#include <asm/cache.h>
#include <asm/immap_85xx.h>
#include <asm/immap_fsl_pci.h>
#include <asm/fsl_ddr_sdram.h>
@@ -441,7 +442,6 @@ pci_init_board(void)
int board_early_init_r(void)
{
- unsigned int i;
const unsigned int flashbase = CONFIG_SYS_FLASH_BASE;
const u8 flash_esel = 1;
@@ -450,11 +450,9 @@ int board_early_init_r(void)
* so that flash can be erased properly.
*/
- /* Invalidate any remaining lines of the flash from caches. */
- for (i = 0; i < 256*1024*1024; i+=32) {
- asm volatile ("dcbi %0,%1": : "b" (flashbase), "r" (i));
- asm volatile ("icbi %0,%1": : "b" (flashbase), "r" (i));
- }
+ /* Flush d-cache and invalidate i-cache of any FLASH data */
+ flush_dcache();
+ invalidate_icache();
/* invalidate existing TLB entry for flash + promjet */
disable_tlb(flash_esel);