123456789101112131415161718192021222324252627282930313233343536 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * 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>
- */
- #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 */
- }
|