u-boot/arch/arm/cpu/arm920t/ep93xx/cpu.c
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

37 lines
932 B
C

/*
* Cirrus Logic EP93xx CPU-specific support.
*
* Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
*
* Copyright (C) 2004, 2005
* Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/ep93xx.h>
#include <asm/io.h>
/* We reset the CPU by generating a 1-->0 transition on DeviceCfg bit 31. */
extern void reset_cpu(ulong addr)
{
struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
uint32_t value;
/* Unlock DeviceCfg and set SWRST */
writel(0xAA, &syscon->sysswlock);
value = readl(&syscon->devicecfg);
value |= SYSCON_DEVICECFG_SWRST;
writel(value, &syscon->devicecfg);
/* Unlock DeviceCfg and clear SWRST */
writel(0xAA, &syscon->sysswlock);
value = readl(&syscon->devicecfg);
value &= ~SYSCON_DEVICECFG_SWRST;
writel(value, &syscon->devicecfg);
/* Dying... */
while (1)
; /* noop */
}