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arm, at91: add icache support

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add at least icache support for at91 based boards.
This speeds up NOR flash access on an at91sam9g15
based board from 15.2 seconds reading 8 MiB from
a SPI NOR flash to 5.7 seconds.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
This commit is contained in:
Heiko Schocher
2016-08-17 09:13:25 +02:00
committed by Andreas Bießmann
parent 806a5a3958
commit 6ed67659b9
3 changed files with 30 additions and 6 deletions
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6
board/bluewater/gurnard/gurnard.c
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@@ -414,12 +414,6 @@ void reset_phy(void)
{
}
/* This breaks the Ethernet MAC at present */
void enable_caches(void)
{
dcache_enable();
}
/* SPI chip select control - only used for FPGA programming */
#ifdef CONFIG_ATMEL_SPI