u-boot/arch/arm/mach-at91/arm926ejs/cache.c
Heiko Schocher 6ed67659b9 arm, at91: add icache support
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>
2016-10-28 18:37:13 +02:00

29 lines
505 B
C

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