69 lines
1.2 KiB
C
69 lines
1.2 KiB
C
/*
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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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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.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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#include <asm/io.h>
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#ifdef CONFIG_USE_IRQ
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DECLARE_GLOBAL_DATA_PTR;
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#endif
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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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* just disable everything that can disturb booting linux
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*/
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disable_interrupts ();
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/* turn off I-cache */
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icache_disable();
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dcache_disable();
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/* flush I-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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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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#define RST_BASE 0x90030000
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#define RSRR 0x00
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#define RCSR 0x04
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__attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused)))
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{
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/* repeat endlessly */
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while (1) {
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writel(0, RST_BASE + RCSR);
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writel(1, RST_BASE + RSRR);
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}
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}
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