1 /* $NetBSD: clock.c,v 1.5 2014/11/21 00:51:09 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Manuel Bouyer. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <lib/libsa/stand.h> 35 #include <lib/libkern/libkern.h> 36 37 #include <netinet/in.h> 38 #include <netinet/in_systm.h> 39 #include <lib/libsa/net.h> 40 41 #include <dev/clock_subr.h> 42 #include <dev/ic/mc146818reg.h> 43 44 #include <mips/cpuregs.h> 45 46 #include "boot.h" 47 48 #define DELAY_CALIBRATE 1000 49 50 #define MCCLOCK_BASE 0x10000070 51 #define MCCLOCK_REG 0 52 #define MCCLOCK_DATA 1 53 54 void 55 delay(int ms) 56 { 57 /* 58 * XXX need *real* clock calibration. 59 */ 60 volatile register int N = ms * DELAY_CALIBRATE; 61 for (; --N;) 62 __insn_barrier(); 63 } 64 65 satime_t 66 getsecs(void) 67 { 68 volatile uint8_t *mcclock_reg, *mcclock_data; 69 u_int sec; 70 71 mcclock_reg = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_REG); 72 mcclock_data = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_DATA); 73 74 *mcclock_reg = MC_SEC; 75 sec = bcdtobin(*mcclock_data); 76 *mcclock_reg = MC_MIN; 77 sec += bcdtobin(*mcclock_data) * 60; 78 *mcclock_reg = MC_HOUR; 79 sec += bcdtobin(*mcclock_data) * 60 * 60; 80 81 return (satime_t)sec; 82 } 83