mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-03 21:48:15 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
38 lines
932 B
C
38 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 */
|
|
}
|