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

[Heiko Schocher]

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

Signed-off-by: Heiko Schocher <hs at denx.de>
---
- changes since v1:
  - changed commit message
  - moved cache patches before relocation patches

 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

-- 
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