ARM V7 (OMAP): add data cache support, test on Beagle board
authorHeiko Schocher <hs@denx.de>
Fri, 17 Sep 2010 11:10:31 +0000 (13:10 +0200)
committerWolfgang Denk <wd@denx.de>
Sun, 19 Sep 2010 17:29:51 +0000 (19:29 +0200)
commit95c6f6d34d4ff23f4d005488d84682eec5fa9ec8
treedf364195d710c9af05e9fa3341dd6e13fc121173
parentc3330e9d6a11b6ead4a2346001338ce884b5832b
ARM V7 (OMAP): add data cache support, test on Beagle board

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>
arch/arm/cpu/armv7/omap3/cache.S
arch/arm/lib/cache.c
include/configs/omap3_beagle.h