diff options
Diffstat (limited to 'sys/pc98')
| -rw-r--r-- | sys/pc98/cbus/clock.c | 563 | ||||
| -rw-r--r-- | sys/pc98/conf/GENERIC.hints | 4 |
2 files changed, 4 insertions, 563 deletions
diff --git a/sys/pc98/cbus/clock.c b/sys/pc98/cbus/clock.c deleted file mode 100644 index 2596571..0000000 --- a/sys/pc98/cbus/clock.c +++ /dev/null @@ -1,563 +0,0 @@ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * William Jolitz and Don Ahn. - * - * 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. - * 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: @(#)clock.c 7.2 (Berkeley) 5/12/91 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -/* - * Routines to handle clock hardware. - */ - -/* - * modified for PC98 by Kakefuda - */ - -#include "opt_apic.h" -#include "opt_clock.h" -#include "opt_kdtrace.h" -#include "opt_isa.h" -#include "opt_mca.h" - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/lock.h> -#include <sys/kdb.h> -#include <sys/mutex.h> -#include <sys/proc.h> -#include <sys/timetc.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/smp.h> -#include <sys/sysctl.h> - -#include <machine/clock.h> -#include <machine/cpu.h> -#include <machine/frame.h> -#include <machine/intr_machdep.h> -#include <machine/md_var.h> -#include <machine/apicvar.h> -#include <machine/ppireg.h> -#include <machine/timerreg.h> -#include <machine/smp.h> - -#include <pc98/pc98/pc98_machdep.h> -#ifdef DEV_ISA -#include <pc98/cbus/cbus.h> -#include <isa/isavar.h> -#endif - -#ifdef KDTRACE_HOOKS -#include <sys/dtrace_bsd.h> -#endif - -#define TIMER_DIV(x) ((i8254_freq + (x) / 2) / (x)) - -int clkintr_pending; -#ifndef TIMER_FREQ -#define TIMER_FREQ 2457600 -#endif -u_int i8254_freq = TIMER_FREQ; -TUNABLE_INT("hw.i8254.freq", &i8254_freq); -int i8254_max_count; -static int i8254_real_max_count; - -static struct mtx clock_lock; -static struct intsrc *i8254_intsrc; -static u_int32_t i8254_lastcount; -static u_int32_t i8254_offset; -static int (*i8254_pending)(struct intsrc *); -static int i8254_ticked; - -/* Values for timerX_state: */ -#define RELEASED 0 -#define RELEASE_PENDING 1 -#define ACQUIRED 2 -#define ACQUIRE_PENDING 3 - -static u_char timer1_state; - -static unsigned i8254_get_timecount(struct timecounter *tc); -#if 0 -static unsigned i8254_simple_get_timecount(struct timecounter *tc); -#endif -static void set_i8254_freq(u_int freq, int intr_freq); - -static struct timecounter i8254_timecounter = { - i8254_get_timecount, /* get_timecount */ - 0, /* no poll_pps */ - ~0u, /* counter_mask */ - 0, /* frequency */ - "i8254", /* name */ - 0 /* quality */ -}; - -int -hardclockintr(struct trapframe *frame) -{ - - timer1clock(TRAPF_USERMODE(frame), TRAPF_PC(frame)); - return (FILTER_HANDLED); -} - -int -statclockintr(struct trapframe *frame) -{ - - return (FILTER_HANDLED); -} - -static int -clkintr(struct trapframe *frame) -{ - - if (timecounter->tc_get_timecount == i8254_get_timecount) { - mtx_lock_spin(&clock_lock); - if (i8254_ticked) - i8254_ticked = 0; - else { - i8254_offset += i8254_max_count; - i8254_lastcount = 0; - } - clkintr_pending = 0; - mtx_unlock_spin(&clock_lock); - } - -#ifdef KDTRACE_HOOKS - /* - * If the DTrace hooks are configured and a callback function - * has been registered, then call it to process the high speed - * timers. - */ - int cpu = PCPU_GET(cpuid); - if (cyclic_clock_func[cpu] != NULL) - (*cyclic_clock_func[cpu])(frame); -#endif - -#ifdef SMP - if (smp_started) - ipi_all_but_self(IPI_HARDCLOCK); -#endif - hardclockintr(frame); - return (FILTER_HANDLED); -} - -int -timer_spkr_acquire(void) -{ - int mode; - - mode = TIMER_SEL1 | TIMER_SQWAVE | TIMER_16BIT; - - if (timer1_state != RELEASED) - return (-1); - timer1_state = ACQUIRED; - - /* - * This access to the timer registers is as atomic as possible - * because it is a single instruction. We could do better if we - * knew the rate. Use of splclock() limits glitches to 10-100us, - * and this is probably good enough for timer2, so we aren't as - * careful with it as with timer0. - */ - outb(TIMER_MODE, TIMER_SEL1 | (mode & 0x3f)); - ppi_spkr_on(); /* enable counter1 output to speaker */ - - return (0); -} - -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! - */ -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 (intr_freq == 0) - 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() -{ - - timer1hz = hz; - 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; - profhz = hz; - if (hz < 128) - stathz = hz; - else - stathz = hz / (hz / 128); - timer2hz = 0; - - init_TSC_tc(); -} - -void -cpu_initclocks_ap(void) -{ -} - -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", ""); - -#if 0 -static unsigned -i8254_simple_get_timecount(struct timecounter *tc) -{ - - return (i8254_max_count - getit()); -} -#endif - -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 */ diff --git a/sys/pc98/conf/GENERIC.hints b/sys/pc98/conf/GENERIC.hints index 58a72e7..171c11b 100644 --- a/sys/pc98/conf/GENERIC.hints +++ b/sys/pc98/conf/GENERIC.hints @@ -42,6 +42,10 @@ hint.ct.0.at="isa" #hint.ct.0.at="isa" #hint.ct.0.flags="0x50000" +hint.attimer.0.at="isa" +hint.attimer.0.port="0x71" +hint.attimer.0.irq="0" + hint.pcrtc.0.at="isa" hint.pckbd.0.at="isa" |
