1 /* $NetBSD: timer.c,v 1.12 2023/08/30 17:10:17 tsutsui Exp $ */ 2 /* NetBSD: clock.c,v 1.31 2001/05/27 13:53:24 sommerfeld Exp */ 3 4 /* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah Hdr: clock.c 1.18 91/01/21 38 * 39 * @(#)clock.c 8.1 (Berkeley) 6/10/93 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: timer.c,v 1.12 2023/08/30 17:10:17 tsutsui Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/systm.h> 48 49 #include <mips/locore.h> 50 #include <mips/mips3_clock.h> 51 52 #include <arc/arc/timervar.h> 53 54 device_t timerdev; 55 const struct timerfns *timerfns; 56 int timerinitted; 57 uint32_t last_cp0_count; 58 59 void 60 timerattach(device_t dev, const struct timerfns *fns) 61 { 62 63 /* 64 * Just bookkeeping. 65 */ 66 67 if (timerfns != NULL) 68 panic("timerattach: multiple timers"); 69 timerdev = dev; 70 timerfns = fns; 71 } 72 73 /* 74 * Machine-dependent clock routines. 75 */ 76 77 /* 78 * Start the real-time and statistics clocks. Leave stathz 0 since there 79 * are no other timers available. 80 */ 81 void 82 cpu_initclocks(void) 83 { 84 85 if (timerfns == NULL) 86 panic("cpu_initclocks: no timer attached"); 87 88 /* 89 * Get the clock started. 90 */ 91 (*timerfns->tf_init)(timerdev); 92 93 /* init timecounter */ 94 mips3_init_tc(); 95 } 96 97 /* 98 * This does not need to do anything, as we don't use a timer for statclock 99 * and profhz == stathz == hz. 100 */ 101 void 102 setstatclockrate(int newhz) 103 { 104 105 /* nothing to do */ 106 } 107