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ARM V7 (OMAP): add data cache support, test on Beagle board

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Add data cache support for ARM V7 systems. Used cache flush
functions from linux:arch/arm/mm/cache-v7.S developed from
Catalin Marinas.

Enable "cache" command on Beagle 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
    --------------------------------------------------
    Beagle (Cortex A8)	116s	106s	30.3s	= x 3.8

    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
    --------------------------------------------------
    Beagle (Cortex A8)	1.84s	1.64s	0.12s	= x 15.3

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

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Ben Gardiner<bengardiner@nanometrics.ca>
This commit is contained in:
Heiko Schocher
2010-09-17 13:10:31 +02:00
committed by Wolfgang Denk
parent c3330e9d6a
commit 95c6f6d34d
3 changed files with 86 additions and 0 deletions
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1
include/configs/omap3_beagle.h
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@@ -120,6 +120,7 @@
/* commands to include */
#include <config_cmd_default.h>
#define CONFIG_CMD_CACHE
#define CONFIG_CMD_EXT2 /* EXT2 Support */
#define CONFIG_CMD_FAT /* FAT support */
#define CONFIG_CMD_JFFS2 /* JFFS2 Support */