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ARM (ARM11): add data cache support, test on Qong board

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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>
This commit is contained in:
Heiko Schocher 2010-09-17 13:10:32 +02:00 committed by Wolfgang Denk
parent 95c6f6d34d
commit 7e4a9e6dc8
3 changed files with 7 additions and 1 deletions
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5
arch/arm/cpu/arm1136/start.S
View File

@ -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 */

2
arch/arm/lib/cache.c
View File

@ -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();

1
include/configs/qong.h
View File

@ -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