1 /* $NetBSD: clock.c,v 1.2 2007/10/30 15:07:08 tsutsui 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/types.h> 41 #include <lib/libsa/stand.h> 42 #include <lib/libkern/libkern.h> 43 44 #include <netinet/in.h> 45 #include <netinet/in_systm.h> 46 #include <lib/libsa/net.h> 47 48 #include <dev/ic/mc146818reg.h> 49 50 #include <mips/cpuregs.h> 51 52 #include "boot.h" 53 54 #define DELAY_CALIBRATE 1000 55 56 #define MCCLOCK_BASE 0x10000070 57 #define MCCLOCK_REG 0 58 #define MCCLOCK_DATA 1 59 60 void 61 delay(int ms) 62 { 63 /* 64 * XXX need *real* clock calibration. 65 */ 66 volatile register int N = ms * DELAY_CALIBRATE; 67 for (; --N;) 68 __insn_barrier(); 69 } 70 71 time_t 72 getsecs(void) 73 { 74 volatile uint8_t *mcclock_reg, *mcclock_data; 75 u_int sec; 76 77 mcclock_reg = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_REG); 78 mcclock_data = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_DATA); 79 80 *mcclock_reg = MC_SEC; 81 sec = bcdtobin(*mcclock_data); 82 *mcclock_reg = MC_MIN; 83 sec += bcdtobin(*mcclock_data) * 60; 84 *mcclock_reg = MC_HOUR; 85 sec += bcdtobin(*mcclock_data) * 60 * 60; 86 87 return (time_t)sec; 88 } 89