[U-Boot] [PATCH 05/26 v2][NEXT] ARM (ARM11): add data cache support, test on Qong board

Heiko Schocher
2010-09-17T11:10:32Z

Add data cache support for arm1136 systems.

Enable "cache" command on Qong board and test performance.

Test 1: Loading 127 MB of data from NAND flash into RAM:

Instr. Cache off on on
Data Cache off off on
--------------------------------------------------
QONG (ARM11) 177s 95s 43s = x 4.1

Test 2: uncompressing a gzipped image from RAM to RAM
(size compressed: 6.5 MiB, uncompressed: 35 MiB):

Instr. Cache off on on
Data Cache off off on
--------------------------------------------------
QONG (ARM11) 1.54s 0.95s 0.18s = x 8.6

Portions of this work were supported by funding from
the CE Linux Forum.

Signed-off-by: Heiko Schocher <hs@denx.de>
---
arch/arm/cpu/arm1136/start.S | 5 +++++
arch/arm/lib/cache.c | 2 +-
include/configs/qong.h | 1 +
3 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 41eb82d..1c58abd 100644
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -439,6 +439,11 @@ fiq:
.align 5
.global arm1136_cache_flush
arm1136_cache_flush:
+#if !defined(CONFIG_SYS_NO_ICACHE)
mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache
+#endif
+#if !defined(CONFIG_SYS_NO_DCACHE)
+ mcr p15, 0, r1, c7, c14, 0 @ invalidate D cache
+#endif
mov pc, lr @ back to caller
#endif /* CONFIG_PRELOADER */
diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c
index 3684cad..55b633e 100644
--- a/arch/arm/lib/cache.c
+++ b/arch/arm/lib/cache.c
@@ -27,7 +27,7 @@

void flush_cache (unsigned long dummy1, unsigned long dummy2)
{
-#ifdef CONFIG_OMAP2420
+#if defined(CONFIG_OMAP2420) || defined(CONFIG_ARM1136)
void arm1136_cache_flush(void);

arm1136_cache_flush();
diff --git a/include/configs/qong.h b/include/configs/qong.h
index 100fa3f..4735b5e 100644
--- a/include/configs/qong.h
+++ b/include/configs/qong.h
@@ -104,6 +104,7 @@

#include <config_cmd_default.h>

+#define CONFIG_CMD_CACHE
#define CONFIG_CMD_PING
#define CONFIG_CMD_DHCP
#define CONFIG_CMD_NET
--
1.6.2.5