1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef __SP805_H__ 32 #define __SP805_H__ 33 34 /* SP805 register offset */ 35 #define SP805_WDOG_LOAD_OFF 0x000 36 #define SP805_WDOG_CTR_OFF 0x008 37 #define SP805_WDOG_LOCK_OFF 0xc00 38 39 /* Magic word to unlock the wd registers */ 40 #define WDOG_UNLOCK_KEY 0x1ACCE551 41 42 /* Register field definitions */ 43 #define SP805_CTR_RESEN (1 << 1) 44 #define SP805_CTR_INTEN (1 << 0) 45 46 #ifndef __ASSEMBLY__ 47 48 #include <stdint.h> 49 50 /* Public high level API */ 51 52 void sp805_start(uintptr_t base, unsigned long ticks); 53 void sp805_stop(uintptr_t base); 54 void sp805_refresh(uintptr_t base, unsigned long ticks); 55 56 #endif /* __ASSEMBLY__ */ 57 58 #endif /* __SP805_H__ */ 59