mirror of
https://github.com/brain-hackers/u-boot-brain
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6ed67659b9
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>
30 lines
505 B
C
30 lines
505 B
C
/*
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* (C) Copyright 2016
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* Heiko Schocher, DENX Software Engineering, hs@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <linux/types.h>
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#include <common.h>
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void enable_caches(void)
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{
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#ifndef CONFIG_SYS_ICACHE_OFF
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icache_enable();
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#endif
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}
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#ifndef CONFIG_SYS_ICACHE_OFF
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/* Invalidate entire I-cache and branch predictor array */
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void invalidate_icache_all(void)
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{
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unsigned long i = 0;
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asm ("mcr p15, 0, %0, c7, c5, 0" : : "r" (i));
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}
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#else
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void invalidate_icache_all(void)
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{
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}
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#endif
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