blob: 98df7e2152a04bffc5ecad056c6432b73f84c8ed [file] [log] [blame]
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <mmio.h>
#include <sp805.h>
#include <stdint.h>
/* Inline register access functions */
static inline void sp805_write_wdog_load(uintptr_t base, unsigned long value)
{
mmio_write_32(base + SP805_WDOG_LOAD_OFF, value);
}
static inline void sp805_write_wdog_ctrl(uintptr_t base, unsigned long value)
{
mmio_write_32(base + SP805_WDOG_CTR_OFF, value);
}
static inline void sp805_write_wdog_lock(uintptr_t base, unsigned long value)
{
mmio_write_32(base + SP805_WDOG_LOCK_OFF, value);
}
/* Public API implementation */
void sp805_start(uintptr_t base, unsigned long ticks)
{
sp805_write_wdog_load(base, ticks);
sp805_write_wdog_ctrl(base, SP805_CTR_RESEN | SP805_CTR_INTEN);
/* Lock registers access */
sp805_write_wdog_lock(base, 0);
}
void sp805_stop(uintptr_t base)
{
sp805_write_wdog_lock(base, WDOG_UNLOCK_KEY);
sp805_write_wdog_ctrl(base, 0);
}
void sp805_refresh(uintptr_t base, unsigned long ticks)
{
sp805_write_wdog_lock(base, WDOG_UNLOCK_KEY);
sp805_write_wdog_load(base, ticks);
sp805_write_wdog_lock(base, 0);
}