mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
MFi386: Merge yet another the RTC related work.
Split the pcrtc driver into pcrtc.c which is repo-copied from clock.c
This commit is contained in:
Yoshihiro Takahashi
parent
3bf67daaf3
commit
56436510eb
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=178315
@ -336,6 +336,7 @@ pc98/cbus/gdc.c optional gdc
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pc98/cbus/nmi.c standard
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pc98/cbus/olpt.c optional olpt
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pc98/cbus/pckbd.c optional pckbd
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pc98/cbus/pcrtc.c standard
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pc98/cbus/pmc.c optional pmc
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pc98/cbus/scgdcrndr.c optional sc gdc
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pc98/cbus/scterm-sck.c optional sc
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@ -39,13 +39,6 @@ __FBSDID("$FreeBSD$");
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* Routines to handle clock hardware.
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*/
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/*
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* inittodr, settodr and support routines written
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* by Christoph Robitschko <chmr@edvz.tu-graz.ac.at>
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*
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* reintroduced and updated by Chris Stenton <chris@gnome.co.uk> 8/10/94
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*/
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/*
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* modified for PC98 by Kakefuda
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*/
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@ -63,32 +56,25 @@ __FBSDID("$FreeBSD$");
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#include <sys/kdb.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/time.h>
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#include <sys/timetc.h>
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#include <sys/kernel.h>
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#include <sys/limits.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/power.h>
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#include <machine/clock.h>
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#include <machine/cpu.h>
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#include <machine/cputypes.h>
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#include <machine/frame.h>
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#include <machine/intr_machdep.h>
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#include <machine/md_var.h>
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#include <machine/psl.h>
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#ifdef DEV_APIC
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#include <machine/apicvar.h>
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#endif
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#include <machine/specialreg.h>
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#include <machine/ppireg.h>
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#include <machine/timerreg.h>
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#include <i386/isa/icu.h>
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#include <pc98/cbus/cbus.h>
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#include <pc98/pc98/pc98_machdep.h>
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#ifdef DEV_ISA
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#include <pc98/cbus/cbus.h>
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#include <isa/isavar.h>
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#endif
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@ -356,7 +342,6 @@ i8254_restore(void)
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mtx_unlock_spin(&clock_lock);
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}
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/*
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* Restore all the timers non-atomically (XXX: should be atomically).
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*
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@ -544,209 +529,3 @@ static devclass_t attimer_devclass;
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DRIVER_MODULE(attimer, isa, attimer_driver, attimer_devclass, 0, 0);
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#endif /* DEV_ISA */
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#ifdef DEV_ISA
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/**********************************************************************
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* RTC driver for subr_rtc
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*/
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#include "clock_if.h"
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#include <sys/rman.h>
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static void rtc_serialcombit(int);
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static void rtc_serialcom(int);
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static int rtc_inb(void);
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static void rtc_outb(int);
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static void
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rtc_serialcombit(int i)
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{
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outb(IO_RTC, ((i&0x01)<<5)|0x07);
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DELAY(1);
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outb(IO_RTC, ((i&0x01)<<5)|0x17);
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DELAY(1);
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outb(IO_RTC, ((i&0x01)<<5)|0x07);
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DELAY(1);
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}
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static void
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rtc_serialcom(int i)
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{
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rtc_serialcombit(i&0x01);
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rtc_serialcombit((i&0x02)>>1);
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rtc_serialcombit((i&0x04)>>2);
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rtc_serialcombit((i&0x08)>>3);
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outb(IO_RTC, 0x07);
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DELAY(1);
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outb(IO_RTC, 0x0f);
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DELAY(1);
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outb(IO_RTC, 0x07);
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DELAY(1);
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}
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static void
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rtc_outb(int val)
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{
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int s;
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int sa = 0;
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for (s=0;s<8;s++) {
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sa = ((val >> s) & 0x01) ? 0x27 : 0x07;
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outb(IO_RTC, sa); /* set DI & CLK 0 */
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DELAY(1);
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outb(IO_RTC, sa | 0x10); /* CLK 1 */
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DELAY(1);
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}
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outb(IO_RTC, sa & 0xef); /* CLK 0 */
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}
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static int
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rtc_inb(void)
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{
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int s;
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int sa = 0;
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for (s=0;s<8;s++) {
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sa |= ((inb(0x33) & 0x01) << s);
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outb(IO_RTC, 0x17); /* CLK 1 */
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DELAY(1);
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outb(IO_RTC, 0x07); /* CLK 0 */
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DELAY(2);
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}
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return sa;
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}
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struct pcrtc_softc {
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int port_rid1, port_rid2;
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struct resource *port_res1, *port_res2;
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};
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/*
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* Attach to the ISA PnP descriptors for the timer and realtime clock.
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*/
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static struct isa_pnp_id pcrtc_ids[] = {
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{ 0x000bd041 /* PNP0B00 */, "AT realtime clock" },
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{ 0 }
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};
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static int
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pcrtc_probe(device_t dev)
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{
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int result;
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device_set_desc(dev, "PC Real Time Clock");
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result = ISA_PNP_PROBE(device_get_parent(dev), dev, pcrtc_ids);
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/* ENXIO if wrong PnP-ID, ENOENT ifno PnP-ID, zero if good PnP-iD */
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if (result != ENOENT)
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return(result);
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/* All PC's have an RTC, and we're hosed without it, so... */
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return (BUS_PROBE_LOW_PRIORITY);
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}
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static int
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pcrtc_attach(device_t dev)
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{
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struct pcrtc_softc *sc;
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/*
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* Not that we need them or anything, but grab our resources
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* so they show up, correctly attributed, in the big picture.
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*/
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sc = device_get_softc(dev);
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sc->port_rid1 = 0;
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bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid1, IO_RTC, 1);
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if (!(sc->port_res1 = bus_alloc_resource(dev, SYS_RES_IOPORT,
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&sc->port_rid1, IO_RTC, IO_RTC, 1, RF_ACTIVE)))
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device_printf(dev, "Warning: Couldn't map I/O.\n");
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sc->port_rid2 = 1;
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bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid2, 0x33, 1);
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if (!(sc->port_res2 = bus_alloc_resource(dev, SYS_RES_IOPORT,
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&sc->port_rid2, 0x33, 0x33, 1, RF_ACTIVE)))
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device_printf(dev, "Warning: Couldn't map I/O.\n");
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clock_register(dev, 1000000);
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return(0);
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}
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static int
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pcrtc_settime(device_t dev __unused, struct timespec *ts)
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{
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struct clocktime ct;
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clock_ts_to_ct(ts, &ct);
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rtc_serialcom(0x01); /* Register shift command. */
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rtc_outb(bin2bcd(ct.sec)); /* Write back Seconds */
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rtc_outb(bin2bcd(ct.min)); /* Write back Minutes */
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rtc_outb(bin2bcd(ct.hour)); /* Write back Hours */
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rtc_outb(bin2bcd(ct.day)); /* Write back Day */
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rtc_outb((ct.mon << 4) | ct.dow); /* Write back Month and DOW */
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rtc_outb(bin2bcd(ct.year % 100)); /* Write back Year */
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rtc_serialcom(0x02); /* Time set & Counter hold command. */
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rtc_serialcom(0x00); /* Register hold command. */
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return (0);
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}
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static int
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pcrtc_gettime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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int i;
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rtc_serialcom(0x03); /* Time Read */
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rtc_serialcom(0x01); /* Register shift command. */
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DELAY(20);
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ct.nsec = 0;
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ct.sec = bcd2bin(rtc_inb() & 0xff); /* sec */
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ct.min = bcd2bin(rtc_inb() & 0xff); /* min */
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ct.hour = bcd2bin(rtc_inb() & 0xff); /* hour */
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ct.day = bcd2bin(rtc_inb() & 0xff); /* date */
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i = rtc_inb();
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ct.dow = i & 0x0f; /* dow */
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ct.mon = (i >> 4) & 0x0f; /* month */
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ct.year = bcd2bin(rtc_inb() & 0xff) + 1900; /* year */
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if (ct.year < 1995)
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ct.year += 100;
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/* Set dow = -1 because some clocks don't set it correctly. */
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ct.dow = -1;
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return (clock_ct_to_ts(&ct, ts));
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}
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static device_method_t pcrtc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, pcrtc_probe),
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DEVMETHOD(device_attach, pcrtc_attach),
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DEVMETHOD(device_detach, bus_generic_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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/* XXX stop statclock? */
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DEVMETHOD(device_resume, bus_generic_resume),
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/* XXX restart statclock? */
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/* clock interface */
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DEVMETHOD(clock_gettime, pcrtc_gettime),
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DEVMETHOD(clock_settime, pcrtc_settime),
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{ 0, 0 }
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};
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static driver_t pcrtc_driver = {
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"pcrtc",
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pcrtc_methods,
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sizeof(struct pcrtc_softc),
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};
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static devclass_t pcrtc_devclass;
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DRIVER_MODULE(pcrtc, isa, pcrtc_driver, pcrtc_devclass, 0, 0);
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#endif /* DEV_ISA */
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@ -1,10 +1,7 @@
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* Copyright (c) 2008 TAKAHASHI Yoshihiro
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz and Don Ahn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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@ -13,14 +10,11 @@
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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@ -29,531 +23,28 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)clock.c 7.2 (Berkeley) 5/12/91
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Routines to handle clock hardware.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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/*
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* inittodr, settodr and support routines written
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* by Christoph Robitschko <chmr@edvz.tu-graz.ac.at>
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*
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* reintroduced and updated by Chris Stenton <chris@gnome.co.uk> 8/10/94
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*/
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#include <pc98/cbus/cbus.h>
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#include <isa/isavar.h>
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/*
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* modified for PC98 by Kakefuda
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*/
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#include "opt_apic.h"
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#include "opt_clock.h"
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#include "opt_isa.h"
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#include "opt_mca.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/lock.h>
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#include <sys/kdb.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/time.h>
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#include <sys/timetc.h>
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#include <sys/kernel.h>
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#include <sys/limits.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/power.h>
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#include <machine/clock.h>
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#include <machine/cpu.h>
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#include <machine/cputypes.h>
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#include <machine/frame.h>
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#include <machine/intr_machdep.h>
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#include <machine/md_var.h>
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#include <machine/psl.h>
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#ifdef DEV_APIC
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#include <machine/apicvar.h>
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#endif
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#include <machine/specialreg.h>
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#include <machine/ppireg.h>
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#include <machine/timerreg.h>
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#include <i386/isa/icu.h>
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#include <pc98/cbus/cbus.h>
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#include <pc98/pc98/pc98_machdep.h>
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#ifdef DEV_ISA
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#include <isa/isavar.h>
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#endif
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#define TIMER_DIV(x) ((i8254_freq + (x) / 2) / (x))
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int clkintr_pending;
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int statclock_disable;
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#ifndef TIMER_FREQ
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#define TIMER_FREQ 2457600
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#endif
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u_int i8254_freq = TIMER_FREQ;
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TUNABLE_INT("hw.i8254.freq", &i8254_freq);
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int i8254_max_count;
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static int i8254_real_max_count;
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static struct mtx clock_lock;
|
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static struct intsrc *i8254_intsrc;
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static u_int32_t i8254_lastcount;
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static u_int32_t i8254_offset;
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static int (*i8254_pending)(struct intsrc *);
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static int i8254_ticked;
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static int using_lapic_timer;
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/* Values for timerX_state: */
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#define RELEASED 0
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#define RELEASE_PENDING 1
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#define ACQUIRED 2
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#define ACQUIRE_PENDING 3
|
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static u_char timer1_state;
|
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static unsigned i8254_get_timecount(struct timecounter *tc);
|
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static unsigned i8254_simple_get_timecount(struct timecounter *tc);
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static void set_i8254_freq(u_int freq, int intr_freq);
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static struct timecounter i8254_timecounter = {
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i8254_get_timecount, /* get_timecount */
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0, /* no poll_pps */
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~0u, /* counter_mask */
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0, /* frequency */
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"i8254", /* name */
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0 /* quality */
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};
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static int
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clkintr(struct trapframe *frame)
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{
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if (timecounter->tc_get_timecount == i8254_get_timecount) {
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mtx_lock_spin(&clock_lock);
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if (i8254_ticked)
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i8254_ticked = 0;
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else {
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i8254_offset += i8254_max_count;
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i8254_lastcount = 0;
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}
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clkintr_pending = 0;
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mtx_unlock_spin(&clock_lock);
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}
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KASSERT(!using_lapic_timer, ("clk interrupt enabled with lapic timer"));
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hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
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return (FILTER_HANDLED);
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}
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int
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timer_spkr_acquire(void)
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{
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int mode;
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mode = TIMER_SEL1 | TIMER_SQWAVE | TIMER_16BIT;
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if (timer1_state != RELEASED)
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return (-1);
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timer1_state = ACQUIRED;
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/*
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* This access to the timer registers is as atomic as possible
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* because it is a single instruction. We could do better if we
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* knew the rate. Use of splclock() limits glitches to 10-100us,
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* and this is probably good enough for timer2, so we aren't as
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* careful with it as with timer0.
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*/
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outb(TIMER_MODE, TIMER_SEL1 | (mode & 0x3f));
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ppi_spkr_on(); /* enable counter1 output to speaker */
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return (0);
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||||
}
|
||||
|
||||
int
|
||||
timer_spkr_release(void)
|
||||
{
|
||||
|
||||
if (timer1_state != ACQUIRED)
|
||||
return (-1);
|
||||
timer1_state = RELEASED;
|
||||
outb(TIMER_MODE, TIMER_SEL1 | TIMER_SQWAVE | TIMER_16BIT);
|
||||
ppi_spkr_off(); /* disable counter1 output to speaker */
|
||||
return (0);
|
||||
}
|
||||
|
||||
void
|
||||
timer_spkr_setfreq(int freq)
|
||||
{
|
||||
|
||||
freq = i8254_freq / freq;
|
||||
mtx_lock_spin(&clock_lock);
|
||||
outb(TIMER_CNTR1, (freq) & 0xff);
|
||||
outb(TIMER_CNTR1, (freq) >> 8);
|
||||
mtx_unlock_spin(&clock_lock);
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
getit(void)
|
||||
{
|
||||
int high, low;
|
||||
|
||||
mtx_lock_spin(&clock_lock);
|
||||
|
||||
/* Select timer0 and latch counter value. */
|
||||
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
|
||||
|
||||
low = inb(TIMER_CNTR0);
|
||||
high = inb(TIMER_CNTR0);
|
||||
|
||||
mtx_unlock_spin(&clock_lock);
|
||||
return ((high << 8) | low);
|
||||
}
|
||||
|
||||
/*
|
||||
* Wait "n" microseconds.
|
||||
* Relies on timer 1 counting down from (i8254_freq / hz)
|
||||
* Note: timer had better have been programmed before this is first used!
|
||||
* RTC support routines
|
||||
*/
|
||||
void
|
||||
DELAY(int n)
|
||||
{
|
||||
int delta, prev_tick, tick, ticks_left;
|
||||
|
||||
#ifdef DELAYDEBUG
|
||||
int getit_calls = 1;
|
||||
int n1;
|
||||
static int state = 0;
|
||||
|
||||
if (state == 0) {
|
||||
state = 1;
|
||||
for (n1 = 1; n1 <= 10000000; n1 *= 10)
|
||||
DELAY(n1);
|
||||
state = 2;
|
||||
}
|
||||
if (state == 1)
|
||||
printf("DELAY(%d)...", n);
|
||||
#endif
|
||||
/*
|
||||
* Read the counter first, so that the rest of the setup overhead is
|
||||
* counted. Guess the initial overhead is 20 usec (on most systems it
|
||||
* takes about 1.5 usec for each of the i/o's in getit(). The loop
|
||||
* takes about 6 usec on a 486/33 and 13 usec on a 386/20. The
|
||||
* multiplications and divisions to scale the count take a while).
|
||||
*
|
||||
* However, if ddb is active then use a fake counter since reading
|
||||
* the i8254 counter involves acquiring a lock. ddb must not do
|
||||
* locking for many reasons, but it calls here for at least atkbd
|
||||
* input.
|
||||
*/
|
||||
#ifdef KDB
|
||||
if (kdb_active)
|
||||
prev_tick = 1;
|
||||
else
|
||||
#endif
|
||||
prev_tick = getit();
|
||||
n -= 0; /* XXX actually guess no initial overhead */
|
||||
/*
|
||||
* Calculate (n * (i8254_freq / 1e6)) without using floating point
|
||||
* and without any avoidable overflows.
|
||||
*/
|
||||
if (n <= 0)
|
||||
ticks_left = 0;
|
||||
else if (n < 256)
|
||||
/*
|
||||
* Use fixed point to avoid a slow division by 1000000.
|
||||
* 39099 = 1193182 * 2^15 / 10^6 rounded to nearest.
|
||||
* 2^15 is the first power of 2 that gives exact results
|
||||
* for n between 0 and 256.
|
||||
*/
|
||||
ticks_left = ((u_int)n * 39099 + (1 << 15) - 1) >> 15;
|
||||
else
|
||||
/*
|
||||
* Don't bother using fixed point, although gcc-2.7.2
|
||||
* generates particularly poor code for the long long
|
||||
* division, since even the slow way will complete long
|
||||
* before the delay is up (unless we're interrupted).
|
||||
*/
|
||||
ticks_left = ((u_int)n * (long long)i8254_freq + 999999)
|
||||
/ 1000000;
|
||||
|
||||
while (ticks_left > 0) {
|
||||
#ifdef KDB
|
||||
if (kdb_active) {
|
||||
outb(0x5f, 0);
|
||||
tick = prev_tick - 1;
|
||||
if (tick <= 0)
|
||||
tick = i8254_max_count;
|
||||
} else
|
||||
#endif
|
||||
tick = getit();
|
||||
#ifdef DELAYDEBUG
|
||||
++getit_calls;
|
||||
#endif
|
||||
delta = prev_tick - tick;
|
||||
prev_tick = tick;
|
||||
if (delta < 0) {
|
||||
delta += i8254_max_count;
|
||||
/*
|
||||
* Guard against i8254_max_count being wrong.
|
||||
* This shouldn't happen in normal operation,
|
||||
* but it may happen if set_i8254_freq() is
|
||||
* traced.
|
||||
*/
|
||||
if (delta < 0)
|
||||
delta = 0;
|
||||
}
|
||||
ticks_left -= delta;
|
||||
}
|
||||
#ifdef DELAYDEBUG
|
||||
if (state == 1)
|
||||
printf(" %d calls to getit() at %d usec each\n",
|
||||
getit_calls, (n + 5) / getit_calls);
|
||||
#endif
|
||||
}
|
||||
|
||||
static void
|
||||
set_i8254_freq(u_int freq, int intr_freq)
|
||||
{
|
||||
int new_i8254_real_max_count;
|
||||
|
||||
i8254_timecounter.tc_frequency = freq;
|
||||
mtx_lock_spin(&clock_lock);
|
||||
i8254_freq = freq;
|
||||
if (using_lapic_timer)
|
||||
new_i8254_real_max_count = 0x10000;
|
||||
else
|
||||
new_i8254_real_max_count = TIMER_DIV(intr_freq);
|
||||
if (new_i8254_real_max_count != i8254_real_max_count) {
|
||||
i8254_real_max_count = new_i8254_real_max_count;
|
||||
if (i8254_real_max_count == 0x10000)
|
||||
i8254_max_count = 0xffff;
|
||||
else
|
||||
i8254_max_count = i8254_real_max_count;
|
||||
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
|
||||
outb(TIMER_CNTR0, i8254_real_max_count & 0xff);
|
||||
outb(TIMER_CNTR0, i8254_real_max_count >> 8);
|
||||
}
|
||||
mtx_unlock_spin(&clock_lock);
|
||||
}
|
||||
|
||||
static void
|
||||
i8254_restore(void)
|
||||
{
|
||||
|
||||
mtx_lock_spin(&clock_lock);
|
||||
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
|
||||
outb(TIMER_CNTR0, i8254_real_max_count & 0xff);
|
||||
outb(TIMER_CNTR0, i8254_real_max_count >> 8);
|
||||
mtx_unlock_spin(&clock_lock);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Restore all the timers non-atomically (XXX: should be atomically).
|
||||
*
|
||||
* This function is called from pmtimer_resume() to restore all the timers.
|
||||
* This should not be necessary, but there are broken laptops that do not
|
||||
* restore all the timers on resume.
|
||||
*/
|
||||
void
|
||||
timer_restore(void)
|
||||
{
|
||||
|
||||
i8254_restore(); /* restore i8254_freq and hz */
|
||||
}
|
||||
|
||||
/* This is separate from startrtclock() so that it can be called early. */
|
||||
void
|
||||
i8254_init(void)
|
||||
{
|
||||
|
||||
mtx_init(&clock_lock, "clk", NULL, MTX_SPIN | MTX_NOPROFILE);
|
||||
|
||||
if (pc98_machine_type & M_8M)
|
||||
i8254_freq = 1996800L; /* 1.9968 MHz */
|
||||
else
|
||||
i8254_freq = 2457600L; /* 2.4576 MHz */
|
||||
|
||||
set_i8254_freq(i8254_freq, hz);
|
||||
}
|
||||
|
||||
void
|
||||
startrtclock()
|
||||
{
|
||||
|
||||
set_i8254_freq(i8254_freq, hz);
|
||||
tc_init(&i8254_timecounter);
|
||||
|
||||
init_TSC();
|
||||
}
|
||||
|
||||
/*
|
||||
* Start both clocks running.
|
||||
*/
|
||||
void
|
||||
cpu_initclocks()
|
||||
{
|
||||
|
||||
#ifdef DEV_APIC
|
||||
using_lapic_timer = lapic_setup_clock();
|
||||
#endif
|
||||
/*
|
||||
* If we aren't using the local APIC timer to drive the kernel
|
||||
* clocks, setup the interrupt handler for the 8254 timer 0 so
|
||||
* that it can drive hardclock(). Otherwise, change the 8254
|
||||
* timecounter to user a simpler algorithm.
|
||||
*/
|
||||
if (!using_lapic_timer) {
|
||||
intr_add_handler("clk", 0, (driver_filter_t *)clkintr, NULL,
|
||||
NULL, INTR_TYPE_CLK, NULL);
|
||||
i8254_intsrc = intr_lookup_source(0);
|
||||
if (i8254_intsrc != NULL)
|
||||
i8254_pending =
|
||||
i8254_intsrc->is_pic->pic_source_pending;
|
||||
} else {
|
||||
i8254_timecounter.tc_get_timecount =
|
||||
i8254_simple_get_timecount;
|
||||
i8254_timecounter.tc_counter_mask = 0xffff;
|
||||
set_i8254_freq(i8254_freq, hz);
|
||||
}
|
||||
|
||||
init_TSC_tc();
|
||||
}
|
||||
|
||||
void
|
||||
cpu_startprofclock(void)
|
||||
{
|
||||
}
|
||||
|
||||
void
|
||||
cpu_stopprofclock(void)
|
||||
{
|
||||
}
|
||||
|
||||
static int
|
||||
sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS)
|
||||
{
|
||||
int error;
|
||||
u_int freq;
|
||||
|
||||
/*
|
||||
* Use `i8254' instead of `timer' in external names because `timer'
|
||||
* is is too generic. Should use it everywhere.
|
||||
*/
|
||||
freq = i8254_freq;
|
||||
error = sysctl_handle_int(oidp, &freq, 0, req);
|
||||
if (error == 0 && req->newptr != NULL)
|
||||
set_i8254_freq(freq, hz);
|
||||
return (error);
|
||||
}
|
||||
|
||||
SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
|
||||
0, sizeof(u_int), sysctl_machdep_i8254_freq, "IU", "");
|
||||
|
||||
static unsigned
|
||||
i8254_simple_get_timecount(struct timecounter *tc)
|
||||
{
|
||||
|
||||
return (i8254_max_count - getit());
|
||||
}
|
||||
|
||||
static unsigned
|
||||
i8254_get_timecount(struct timecounter *tc)
|
||||
{
|
||||
u_int count;
|
||||
u_int high, low;
|
||||
u_int eflags;
|
||||
|
||||
eflags = read_eflags();
|
||||
mtx_lock_spin(&clock_lock);
|
||||
|
||||
/* Select timer0 and latch counter value. */
|
||||
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
|
||||
|
||||
low = inb(TIMER_CNTR0);
|
||||
high = inb(TIMER_CNTR0);
|
||||
count = i8254_max_count - ((high << 8) | low);
|
||||
if (count < i8254_lastcount ||
|
||||
(!i8254_ticked && (clkintr_pending ||
|
||||
((count < 20 || (!(eflags & PSL_I) &&
|
||||
count < i8254_max_count / 2u)) &&
|
||||
i8254_pending != NULL && i8254_pending(i8254_intsrc))))) {
|
||||
i8254_ticked = 1;
|
||||
i8254_offset += i8254_max_count;
|
||||
}
|
||||
i8254_lastcount = count;
|
||||
count += i8254_offset;
|
||||
mtx_unlock_spin(&clock_lock);
|
||||
return (count);
|
||||
}
|
||||
|
||||
#ifdef DEV_ISA
|
||||
/*
|
||||
* Attach to the ISA PnP descriptors for the timer
|
||||
*/
|
||||
static struct isa_pnp_id attimer_ids[] = {
|
||||
{ 0x0001d041 /* PNP0100 */, "AT timer" },
|
||||
{ 0 }
|
||||
};
|
||||
|
||||
static int
|
||||
attimer_probe(device_t dev)
|
||||
{
|
||||
int result;
|
||||
|
||||
result = ISA_PNP_PROBE(device_get_parent(dev), dev, attimer_ids);
|
||||
if (result <= 0)
|
||||
device_quiet(dev);
|
||||
return(result);
|
||||
}
|
||||
|
||||
static int
|
||||
attimer_attach(device_t dev)
|
||||
{
|
||||
return(0);
|
||||
}
|
||||
|
||||
static device_method_t attimer_methods[] = {
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_probe, attimer_probe),
|
||||
DEVMETHOD(device_attach, attimer_attach),
|
||||
DEVMETHOD(device_detach, bus_generic_detach),
|
||||
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
||||
DEVMETHOD(device_suspend, bus_generic_suspend),
|
||||
DEVMETHOD(device_resume, bus_generic_resume),
|
||||
{ 0, 0 }
|
||||
};
|
||||
|
||||
static driver_t attimer_driver = {
|
||||
"attimer",
|
||||
attimer_methods,
|
||||
1, /* no softc */
|
||||
};
|
||||
|
||||
static devclass_t attimer_devclass;
|
||||
|
||||
DRIVER_MODULE(attimer, isa, attimer_driver, attimer_devclass, 0, 0);
|
||||
|
||||
#endif /* DEV_ISA */
|
||||
|
||||
#ifdef DEV_ISA
|
||||
|
||||
/**********************************************************************
|
||||
* RTC driver for subr_rtc
|
||||
*/
|
||||
|
||||
#include "clock_if.h"
|
||||
|
||||
#include <sys/rman.h>
|
||||
|
||||
static void rtc_serialcombit(int);
|
||||
static void rtc_serialcom(int);
|
||||
@ -618,6 +109,14 @@ rtc_inb(void)
|
||||
return sa;
|
||||
}
|
||||
|
||||
/**********************************************************************
|
||||
* RTC driver for subr_rtc
|
||||
*/
|
||||
|
||||
#include "clock_if.h"
|
||||
|
||||
#include <sys/rman.h>
|
||||
|
||||
struct pcrtc_softc {
|
||||
int port_rid1, port_rid2;
|
||||
struct resource *port_res1, *port_res2;
|
||||
@ -748,5 +247,3 @@ static driver_t pcrtc_driver = {
|
||||
static devclass_t pcrtc_devclass;
|
||||
|
||||
DRIVER_MODULE(pcrtc, isa, pcrtc_driver, pcrtc_devclass, 0, 0);
|
||||
|
||||
#endif /* DEV_ISA */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user