u-boot/arch/arm/mach-uniphier/reset.c
Masahiro Yamada 928f3248b3 ARM: uniphier: support system reset functionality for PSCI
This supports the system reset via PSCI for ARMv7 SoCs.

Because the system reset is not supported on PSCI 0.1, let's define
CONFIG_ARMV7_PSCI_1_0. (it is supported since PSCI 0.2, but there
is no CONFIG to enable it in U-Boot for now.)

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-08-28 13:09:19 +09:00

36 lines
735 B
C

/*
* Copyright (C) 2012-2014 Panasonic Corporation
* Copyright (C) 2015-2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/io.h>
#include <asm/secure.h>
#include "sc-regs.h"
/* If PSCI is enabled, this is used for SYSTEM_RESET function */
#ifdef CONFIG_ARMV7_PSCI
#define __SECURE __secure
#else
#define __SECURE
#endif
void __SECURE reset_cpu(unsigned long ignored)
{
u32 tmp;
writel(5, SC_IRQTIMSET); /* default value */
tmp = readl(SC_SLFRSTSEL);
tmp &= ~0x3; /* mask [1:0] */
tmp |= 0x0; /* XRST reboot */
writel(tmp, SC_SLFRSTSEL);
tmp = readl(SC_SLFRSTCTL);
tmp |= 0x1;
writel(tmp, SC_SLFRSTCTL);
}