u-boot/arch/arm/cpu/arm920t/cpu.c

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// SPDX-License-Identifier: GPL-2.0+
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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
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*/
/*
* CPU specific code
*/
#include <common.h>
#include <command.h>
#include <asm/system.h>
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static void cache_flush(void);
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int cleanup_before_linux (void)
{
/*
* this function is called just before we call linux
* it prepares the processor for linux
*
* we turn off caches etc ...
*/
disable_interrupts ();
/* turn off I/D-cache */
icache_disable();
dcache_disable();
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/* flush I/D-cache */
cache_flush();
return 0;
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}
/* flush I/D-cache */
static void cache_flush (void)
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{
unsigned long i = 0;
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asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
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}