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[src/trunk]: src/sys/arch/arc/arc split clock.c into interval timer part ("ti...
details: https://anonhg.NetBSD.org/src/rev/46eb6ddcf162
branches: trunk
changeset: 511126:46eb6ddcf162
user: soda <soda%NetBSD.org@localhost>
date: Wed Jun 13 15:00:26 2001 +0000
description:
split clock.c into interval timer part ("timer" for cpu_initclock) and
real time clock part ("todclock" for inittodr, resettodr)
diffstat:
sys/arch/arc/arc/clock.c | 334 -----------------------------------------
sys/arch/arc/arc/clockvar.h | 80 ---------
sys/arch/arc/arc/timer.c | 129 +++++++++++++++
sys/arch/arc/arc/timervar.h | 41 +++++
sys/arch/arc/arc/todclock.c | 206 +++++++++++++++++++++++++
sys/arch/arc/arc/todclockvar.h | 62 +++++++
6 files changed, 438 insertions(+), 414 deletions(-)
diffs (truncated from 876 to 300 lines):
diff -r 0938aef6529a -r 46eb6ddcf162 sys/arch/arc/arc/clock.c
--- a/sys/arch/arc/arc/clock.c Wed Jun 13 14:58:38 2001 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,334 +0,0 @@
-/* $NetBSD: clock.c,v 1.13 2000/12/24 09:25:24 ur Exp $ */
-/* $OpenBSD: clock.c,v 1.6 1998/10/15 21:30:15 imp Exp $ */
-
-/*
- * Copyright (c) 1997 Per Fogelstrom.
- * Copyright (c) 1988 University of Utah.
- * Copyright (c) 1992, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * the Systems Programming Group of the University of Utah Computer
- * Science Department and Ralph Campbell.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * from: Utah Hdr: clock.c 1.18 91/01/21
- *
- * from: @(#)clock.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/param.h>
-#include <sys/kernel.h>
-#include <sys/systm.h>
-#include <sys/device.h>
-
-#include <machine/autoconf.h>
-#include <machine/cpu.h>
-#include <arc/arc/clockvar.h>
-#include <arc/arc/arctype.h>
-
-#include <dev/isa/isavar.h>
-#include <machine/isa_machdep.h>
-
-int clock_started = 0;
-
-/* Definition of the driver for autoconfig. */
-static int clockmatch __P((struct device *, struct cfdata *, void *));
-static void clockattach __P((struct device *, struct device *, void *));
-
-extern struct cfdriver aclock_cd;
-
-struct cfattach aclock_isa_ca = {
- sizeof(struct clock_softc), clockmatch, clockattach
-};
-
-struct cfattach aclock_algor_ca = {
- sizeof(struct clock_softc), clockmatch, clockattach
-};
-
-void mcclock_attach __P((struct device *, struct device *, void *));
-int clockintr __P((void *));
-
-#define SECMIN ((unsigned)60) /* seconds per minute */
-#define SECHOUR ((unsigned)(60*SECMIN)) /* seconds per hour */
-#define SECDAY ((unsigned)(24*SECHOUR)) /* seconds per day */
-#define SECYR ((unsigned)(365*SECDAY)) /* seconds per common year */
-
-#define LEAPYEAR(year) (((year) % 4) == 0)
-
-static int
-clockmatch(parent, match, aux)
- struct device *parent;
- struct cfdata *match;
- void *aux;
-{
- /* See how many clocks this system has */
- switch (cputype) {
- case DESKSTATION_RPC44:
- case DESKSTATION_TYNE:
- case ALGOR_P4032:
- break;
-
- default:
- panic("unknown CPU");
- }
-
- if (match->cf_unit >= 1)
- return (0);
-
- return (1);
-}
-
-int
-clockintr(cf)
- void *cf;
-{
- if(clock_started)
- hardclock((struct clockframe *)cf);
- return(1);
-}
-
-static void
-clockattach(parent, self, aux)
- struct device *parent;
- struct device *self;
- void *aux;
-{
- struct isa_attach_args *ia = aux;
-
- mcclock_attach(parent, self, aux);
-
- switch (cputype) {
- case ALGOR_P4032:
- BUS_INTR_ESTABLISH((struct confargs *)aux,
- (intr_handler_t)hardclock, self);
- break;
-
- case DESKSTATION_RPC44:
- case DESKSTATION_TYNE:
- (void)isa_intr_establish(ia->ia_ic,
- 0, 1, 3, clockintr, 0);
- break;
-
- default:
- panic("clockattach: it didn't get here. really.");
- }
-
- printf("\n");
-}
-
-/*
- * Wait "n" microseconds. This doesn't belong here. XXX.
- */
-void
-delay(n)
- int n;
-{
- DELAY(n);
-}
-
-/*
- * Machine-dependent clock routines.
- *
- * Startrtclock restarts the real-time clock, which provides
- * hardclock interrupts to kern_clock.c.
- *
- * Inittodr initializes the time of day hardware which provides
- * date functions. Its primary function is to use some file
- * system information in case the hardare clock lost state.
- *
- * Resettodr restores the time of day hardware after a time change.
- */
-
-
-/*
- * Start the real-time and statistics clocks. Leave stathz 0 since there
- * are no other timers available.
- */
-void
-cpu_initclocks()
-{
- extern int tickadj;
- struct clock_softc *csc = (struct clock_softc *)aclock_cd.cd_devs[0];
-
-
- /* Assume 100 Hz */
- hz = 100;
-
- /* Start the clock. */
- (*csc->sc_init)(csc);
-
- /* Recalculate theese if clock init changed hz */
- tick = 1000000 / hz; /* number of micro-seconds between interrupts */
- tickadj = 240000 / (60 * hz); /* can adjust 240ms in 60s */
-
- clock_started++;
-}
-
-/*
- * We assume newhz is either stathz or profhz, and that neither will
- * change after being set up above. Could recalculate intervals here
- * but that would be a drag.
- */
-void
-setstatclockrate(newhz)
- int newhz;
-{
-}
-
-/*
- * This code is defunct after 2099.
- * Will Unix still be here then??
- */
-static short dayyr[12] = {
- 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
-};
-
-/*
- * Initialze the time of day register, based on the time base which is, e.g.
- * from a filesystem. Base provides the time to within six months,
- * and the time of year clock (if any) provides the rest.
- */
-void
-inittodr(base)
- time_t base;
-{
- struct tod_time c;
- struct clock_softc *csc = (struct clock_softc *)aclock_cd.cd_devs[0];
- register int days, yr;
- long deltat;
- int badbase;
-
- if (base < 5*SECYR) {
- printf("WARNING: preposterous time in file system");
- /* read the system clock anyway */
- base = 6*SECYR + 186*SECDAY + SECDAY/2;
- badbase = 1;
- } else
- badbase = 0;
-
- /* Read RTC chip registers */
- (*csc->sc_get)(csc, base, &c);
-
- csc->sc_initted = 1;
-
- /* simple sanity checks */
- c.year = c.year+80; /* must be multiple of 4 because chip knows leap */
- if (c.year < 70 || c.mon < 1 || c.mon > 12 || c.day < 1 ||
- c.day > 31 || c.hour > 23 || c.min > 59 || c.sec > 59) {
- /*
- * Believe the time in the file system for lack of
- * anything better, resetting the TODR.
- */
- time.tv_sec = base;
- if (!badbase) {
- printf("WARNING: preposterous clock chip time\n");
- resettodr();
- }
- goto bad;
- }
- days = 0;
- for (yr = 70; yr < c.year; yr++)
- days += LEAPYEAR(yr) ? 366 : 365;
- days += dayyr[c.mon - 1] + c.day - 1;
- if (LEAPYEAR(yr) && c.mon > 2)
- days++;
- /* now have days since Jan 1, 1970; the rest is easy... */
- time.tv_sec = days * SECDAY + c.hour * 3600 + c.min * 60 + c.sec;
-
- if (!badbase) {
- /*
- * See if we gained/lost two or more days;
- * if so, assume something is amiss.
- */
- deltat = time.tv_sec - base;
- if (deltat < 0)
- deltat = -deltat;
- if (deltat < 2 * SECDAY)
- return;
- printf("WARNING: clock %s %ld days",
- time.tv_sec < base ? "lost" : "gained", deltat / SECDAY);
- }
-bad:
- printf(" -- CHECK AND RESET THE DATE!\n");
-}
-
-/*
- * Reset the TODR based on the time value; used when the TODR
- * has a preposterous value and also when the time is reset
- * by the stime system call. Also called when the TODR goes past
- * TODRZERO + 100*(SECYEAR+2*SECDAY) (e.g. on Jan 2 just after midnight)
- * to wrap the TODR around.
- */
-void
-resettodr()
-{
- struct tod_time c;
- struct clock_softc *csc = (struct clock_softc *)aclock_cd.cd_devs[0];
- int t, t2;
-
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