diff options
Diffstat (limited to 'roms/u-boot/arch/arm/cpu/arm920t/ep93xx/cpu.c')
| -rw-r--r-- | roms/u-boot/arch/arm/cpu/arm920t/ep93xx/cpu.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/cpu/arm920t/ep93xx/cpu.c b/roms/u-boot/arch/arm/cpu/arm920t/ep93xx/cpu.c new file mode 100644 index 00000000..bb5ffd29 --- /dev/null +++ b/roms/u-boot/arch/arm/cpu/arm920t/ep93xx/cpu.c @@ -0,0 +1,37 @@ +/* + * 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 */ +} |