52 lines
962 B
C
52 lines
962 B
C
/*
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* (C) Copyright 2004 Texas Insturments
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* CPU specific code
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/system.h>
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static void cache_flush (void);
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int cleanup_before_linux (void)
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{
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/*
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* this function is called just before we call linux
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* it prepares the processor for linux
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*
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* we turn off caches etc ...
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*/
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disable_interrupts ();
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/* turn off I/D-cache */
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icache_disable();
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dcache_disable();
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/* flush I/D-cache */
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cache_flush();
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return 0;
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}
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/* flush I/D-cache */
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static void cache_flush (void)
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{
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/* invalidate both caches and flush btb */
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asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (0));
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/* mem barrier to sync things */
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asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (0));
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}
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