1 /* $NetBSD: clock.c,v 1.4 2009/01/12 11:32:43 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 * 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/ic/mc146818reg.h> 42 43 #include <mips/cpuregs.h> 44 45 #include "boot.h" 46 47 #define DELAY_CALIBRATE 1000 48 49 #define MCCLOCK_BASE 0x10000070 50 #define MCCLOCK_REG 0 51 #define MCCLOCK_DATA 1 52 53 void 54 delay(int ms) 55 { 56 /* 57 * XXX need *real* clock calibration. 58 */ 59 volatile register int N = ms * DELAY_CALIBRATE; 60 for (; --N;) 61 __insn_barrier(); 62 } 63 64 satime_t 65 getsecs(void) 66 { 67 volatile uint8_t *mcclock_reg, *mcclock_data; 68 u_int sec; 69 70 mcclock_reg = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_REG); 71 mcclock_data = (void *)MIPS_PHYS_TO_KSEG1(MCCLOCK_BASE + MCCLOCK_DATA); 72 73 *mcclock_reg = MC_SEC; 74 sec = bcdtobin(*mcclock_data); 75 *mcclock_reg = MC_MIN; 76 sec += bcdtobin(*mcclock_data) * 60; 77 *mcclock_reg = MC_HOUR; 78 sec += bcdtobin(*mcclock_data) * 60 * 60; 79 80 return (satime_t)sec; 81 } 82