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