diff options
Diffstat (limited to 'sys/i386/isa/isa.c')
| -rw-r--r-- | sys/i386/isa/isa.c | 791 |
1 files changed, 0 insertions, 791 deletions
diff --git a/sys/i386/isa/isa.c b/sys/i386/isa/isa.c deleted file mode 100644 index ec08312..0000000 --- a/sys/i386/isa/isa.c +++ /dev/null @@ -1,791 +0,0 @@ -/*- - * Copyright (c) 1991 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * William Jolitz. - * - * 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: @(#)isa.c 7.2 (Berkeley) 5/13/91 - * $Id: isa.c,v 1.4 1993/10/13 15:59:28 rgrimes Exp $ - */ - -/* - * code to manage AT bus - * - * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): - * Fixed uninitialized variable problem and added code to deal - * with DMA page boundaries in isa_dmarangecheck(). Fixed word - * mode DMA count compution and reorganized DMA setup code in - * isa_dmastart() - */ - -#include "param.h" -#include "systm.h" -#include "conf.h" -#include "file.h" -#include "buf.h" -#include "uio.h" -#include "syslog.h" -#include "malloc.h" -#include "rlist.h" -#include "machine/segments.h" -#include "vm/vm.h" -#include "i386/isa/isa_device.h" -#include "i386/isa/isa.h" -#include "i386/isa/icu.h" -#include "i386/isa/ic/i8237.h" -#include "i386/isa/ic/i8042.h" - -/* -** Register definitions for DMA controller 1 (channels 0..3): -*/ -#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ -#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ -#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ -#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ - -/* -** Register definitions for DMA controller 2 (channels 4..7): -*/ -#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ -#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ -#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ -#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ - -int config_isadev __P((struct isa_device *, u_int *)); - -/* - * print a conflict message - */ -void -conflict(dvp, tmpdvp, item, reason, format) - struct isa_device *dvp, *tmpdvp; - int item; - char *reason; - char *format; -{ - printf("%s%d not probed due to %s conflict with %s%d at ", - dvp->id_driver->name, dvp->id_unit, reason, - tmpdvp->id_driver->name, tmpdvp->id_unit); - printf(format, item); - printf("\n"); -} - -/* - * Check to see if things are alread in use, like IRQ's, I/O addresses - * and Memory addresses. - */ -int -haveseen(dvp, tmpdvp) - struct isa_device *dvp, *tmpdvp; -{ - int status = 0; - - /* - * Only check against devices that have already been found - */ - if (tmpdvp->id_alive) { - /* - * Check for I/O address conflict. We can only check the - * starting address of the device against the range of the - * device that has already been probed since we do not - * know how many I/O addresses this device uses. - */ - if (tmpdvp->id_alive != -1) { - if ((dvp->id_iobase >= tmpdvp->id_iobase) && - (dvp->id_iobase <= - (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { - conflict(dvp, tmpdvp, dvp->id_iobase, - "I/O address", "0x%x"); - status = 1; - } - } - /* - * Check for Memory address conflict. We can check for - * range overlap, but it will not catch all cases since the - * driver may adjust the msize paramater during probe, for - * now we just check that the starting address does not - * fall within any allocated region. - * XXX could add a second check after the probe for overlap, - * since at that time we would know the full range. - * XXX KERNBASE is a hack, we should have vaddr in the table! - */ - if(tmpdvp->id_maddr) { - if((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && - (KERNBASE + dvp->id_maddr <= - (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { - conflict(dvp, tmpdvp, dvp->id_maddr, "maddr", - "0x%x"); - status = 1; - } - } - /* - * Check for IRQ conflicts. - */ - if(tmpdvp->id_irq) { - if (tmpdvp->id_irq == dvp->id_irq) { - conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, - "irq", "%d"); - status = 1; - } - } - /* - * Check for DRQ conflicts. - */ - if(tmpdvp->id_drq != -1) { - if (tmpdvp->id_drq == dvp->id_drq) { - conflict(dvp, tmpdvp, dvp->id_drq, - "drq", "%d"); - status = 1; - } - } - } - return (status); -} - -/* - * Search through all the isa_devtab_* tables looking for anything that - * conflicts with the current device. - */ -int -haveseen_isadev(dvp) - struct isa_device *dvp; -{ - struct isa_device *tmpdvp; - int status = 0; - - for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { - status |= haveseen(dvp, tmpdvp); - } - for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { - status |= haveseen(dvp, tmpdvp); - } - for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { - status |= haveseen(dvp, tmpdvp); - } - for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { - status |= haveseen(dvp, tmpdvp); - } - return(status); -} - -/* - * Configure all ISA devices - */ -void -isa_configure() { - struct isa_device *dvp; - - enable_intr(); - splhigh(); - INTREN(IRQ_SLAVE); - printf("Probing for devices on the ISA bus:\n"); - for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) { - if (!haveseen_isadev(dvp)) - config_isadev(dvp,&ttymask); - } - for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) { - if (!haveseen_isadev(dvp)) - config_isadev(dvp,&biomask); - } - for (dvp = isa_devtab_net; dvp->id_driver; dvp++) { - if (!haveseen_isadev(dvp)) - config_isadev(dvp,&netmask); - } - for (dvp = isa_devtab_null; dvp->id_driver; dvp++) { - if (!haveseen_isadev(dvp)) - config_isadev(dvp,(u_int *) NULL); - } -/* - * XXX We should really add the tty device to netmask when the line is - * switched to SLIPDISC, and then remove it when it is switched away from - * SLIPDISC. No need to block out ALL ttys during a splnet when only one - * of them is running slip. - */ -#include "sl.h" -#if NSL > 0 - netmask |= ttymask; - ttymask |= netmask; -#endif - /* biomask |= ttymask ; can some tty devices use buffers? */ - printf("biomask %x ttymask %x netmask %x\n", biomask, ttymask, netmask); - splnone(); -} - -/* - * Configure an ISA device. - */ -config_isadev(isdp, mp) - struct isa_device *isdp; - u_int *mp; -{ - struct isa_driver *dp = isdp->id_driver; - - if (isdp->id_maddr) { - extern u_int atdevbase; - - isdp->id_maddr -= 0xa0000; /* XXX should be a define */ - isdp->id_maddr += atdevbase; - } - isdp->id_alive = (*dp->probe)(isdp); - if (isdp->id_alive) { - /* - * Only print the I/O address range if id_alive != -1 - * Right now this is a temporary fix just for the new - * NPX code so that if it finds a 486 that can use trap - * 16 it will not report I/O addresses. - * Rod Grimes 04/26/94 - */ - printf("%s%d", dp->name, isdp->id_unit); - if (isdp->id_alive != -1) { - printf(" at 0x%x", isdp->id_iobase); - if ((isdp->id_iobase + isdp->id_alive - 1) != - isdp->id_iobase) { - printf("-0x%x", - isdp->id_iobase + - isdp->id_alive - 1); - } - } - if(isdp->id_irq) - printf(" irq %d", ffs(isdp->id_irq) - 1); - if (isdp->id_drq != -1) - printf(" drq %d", isdp->id_drq); - if (isdp->id_maddr) - printf(" maddr 0x%x", kvtop(isdp->id_maddr)); - if (isdp->id_msize) - printf(" msize %d", isdp->id_msize); - if (isdp->id_flags) - printf(" flags 0x%x", isdp->id_flags); - if (isdp->id_iobase < 0x100) - printf(" on motherboard\n"); - else - printf(" on isa\n"); - - (*dp->attach)(isdp); - - if(isdp->id_irq) { - int intrno; - - intrno = ffs(isdp->id_irq)-1; - setidt(ICU_OFFSET+intrno, isdp->id_intr, - SDT_SYS386IGT, SEL_KPL); - if(mp) { - INTRMASK(*mp,isdp->id_irq); - } - INTREN(isdp->id_irq); - } - } else { - printf("%s%d not found", dp->name, isdp->id_unit); - if (isdp->id_iobase) { - printf(" at 0x%x", isdp->id_iobase); - } - printf("\n"); - } -} - -#define IDTVEC(name) __CONCAT(X,name) -/* default interrupt vector table entries */ -extern IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3), - IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7), - IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11), - IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15); - -static *defvec[16] = { - &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), - &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), - &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), - &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) }; - -/* out of range default interrupt vector gate entry */ -extern IDTVEC(intrdefault); - -/* - * Fill in default interrupt table (in case of spuruious interrupt - * during configuration of kernel, setup interrupt control unit - */ -isa_defaultirq() { - int i; - - /* icu vectors */ - for (i = NRSVIDT ; i < NRSVIDT+ICU_LEN ; i++) - setidt(i, defvec[i], SDT_SYS386IGT, SEL_KPL); - - /* out of range vectors */ - for (i = NRSVIDT; i < NIDT; i++) - setidt(i, &IDTVEC(intrdefault), SDT_SYS386IGT, SEL_KPL); - - /* initialize 8259's */ - outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ - outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ - outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ -#ifdef AUTO_EOI_1 - outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ -#else - outb(IO_ICU1+1, 1); /* 8086 mode */ -#endif - outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ - outb(IO_ICU1, 0x0a); /* default to IRR on read */ - outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ - - outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ - outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ - outb(IO_ICU2+1,2); /* my slave id is 2 */ -#ifdef AUTO_EOI_2 - outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ -#else - outb(IO_ICU2+1,1); /* 8086 mode */ -#endif - outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ - outb(IO_ICU2, 0x0a); /* default to IRR on read */ -} - -/* region of physical memory known to be contiguous */ -vm_offset_t isaphysmem; -static caddr_t dma_bounce[8]; /* XXX */ -static char bounced[8]; /* XXX */ -#define MAXDMASZ 512 /* XXX */ - -/* high byte of address is stored in this port for i-th dma channel */ -static short dmapageport[8] = - { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; - -/* - * isa_dmacascade(): program 8237 DMA controller channel to accept - * external dma control by a board. - */ -void isa_dmacascade(unsigned chan) -{ - if (chan > 7) - panic("isa_dmacascade: impossible request"); - - /* set dma channel mode, and set dma channel mode */ - if ((chan & 4) == 0) { - outb(DMA1_MODE, DMA37MD_CASCADE | chan); - outb(DMA1_SMSK, chan); - } else { - outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); - outb(DMA2_SMSK, chan & 3); - } -} - -/* - * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment - * problems by using a bounce buffer. - */ -void isa_dmastart(int flags, caddr_t addr, unsigned nbytes, unsigned chan) -{ vm_offset_t phys; - int waport; - caddr_t newaddr; - - if ( chan > 7 - || (chan < 4 && nbytes > (1<<16)) - || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) - panic("isa_dmastart: impossible request"); - - if (isa_dmarangecheck(addr, nbytes, chan)) { - if (dma_bounce[chan] == 0) - dma_bounce[chan] = - /*(caddr_t)malloc(MAXDMASZ, M_TEMP, M_WAITOK);*/ - (caddr_t) isaphysmem + NBPG*chan; - bounced[chan] = 1; - newaddr = dma_bounce[chan]; - *(int *) newaddr = 0; /* XXX */ - - /* copy bounce buffer on write */ - if (!(flags & B_READ)) - bcopy(addr, newaddr, nbytes); - addr = newaddr; - } - - /* translate to physical */ - phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); - - if ((chan & 4) == 0) { - /* - * Program one of DMA channels 0..3. These are - * byte mode channels. - */ - /* set dma channel mode, and reset address ff */ - if (flags & B_READ) - outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); - else - outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); - outb(DMA1_FFC, 0); - - /* send start address */ - waport = DMA1_CHN(chan); - outb(waport, phys); - outb(waport, phys>>8); - outb(dmapageport[chan], phys>>16); - - /* send count */ - outb(waport + 1, --nbytes); - outb(waport + 1, nbytes>>8); - - /* unmask channel */ - outb(DMA1_SMSK, chan); - } else { - /* - * Program one of DMA channels 4..7. These are - * word mode channels. - */ - /* set dma channel mode, and reset address ff */ - if (flags & B_READ) - outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); - else - outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); - outb(DMA2_FFC, 0); - - /* send start address */ - waport = DMA2_CHN(chan - 4); - outb(waport, phys>>1); - outb(waport, phys>>9); - outb(dmapageport[chan], phys>>16); - - /* send count */ - nbytes >>= 1; - outb(waport + 2, --nbytes); - outb(waport + 2, nbytes>>8); - - /* unmask channel */ - outb(DMA2_SMSK, chan & 3); - } -} - -void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) -{ - - /* copy bounce buffer on read */ - /*if ((flags & (B_PHYS|B_READ)) == (B_PHYS|B_READ))*/ - if (bounced[chan]) { - bcopy(dma_bounce[chan], addr, nbytes); - bounced[chan] = 0; - } -} - -/* - * Check for problems with the address range of a DMA transfer - * (non-contiguous physical pages, outside of bus address space, - * crossing DMA page boundaries). - * Return true if special handling needed. - */ - -isa_dmarangecheck(caddr_t va, unsigned length, unsigned chan) { - vm_offset_t phys, priorpage = 0, endva; - u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); - - endva = (vm_offset_t)round_page(va + length); - for (; va < (caddr_t) endva ; va += NBPG) { - phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); -#define ISARAM_END RAM_END - if (phys == 0) - panic("isa_dmacheck: no physical page present"); - if (phys > ISARAM_END) - return (1); - if (priorpage) { - if (priorpage + NBPG != phys) - return (1); - /* check if crossing a DMA page boundary */ - if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) - return (1); - } - priorpage = phys; - } - return (0); -} - -/* head of queue waiting for physmem to become available */ -struct buf isa_physmemq; - -/* blocked waiting for resource to become free for exclusive use */ -static isaphysmemflag; -/* if waited for and call requested when free (B_CALL) */ -static void (*isaphysmemunblock)(); /* needs to be a list */ - -/* - * Allocate contiguous physical memory for transfer, returning - * a *virtual* address to region. May block waiting for resource. - * (assumed to be called at splbio()) - */ -caddr_t -isa_allocphysmem(caddr_t va, unsigned length, void (*func)()) { - - isaphysmemunblock = func; - while (isaphysmemflag & B_BUSY) { - isaphysmemflag |= B_WANTED; - sleep(&isaphysmemflag, PRIBIO); - } - isaphysmemflag |= B_BUSY; - - return((caddr_t)isaphysmem); -} - -/* - * Free contiguous physical memory used for transfer. - * (assumed to be called at splbio()) - */ -void -isa_freephysmem(caddr_t va, unsigned length) { - - isaphysmemflag &= ~B_BUSY; - if (isaphysmemflag & B_WANTED) { - isaphysmemflag &= B_WANTED; - wakeup(&isaphysmemflag); - if (isaphysmemunblock) - (*isaphysmemunblock)(); - } -} - -/* - * Handle a NMI, possibly a machine check. - * return true to panic system, false to ignore. - */ -isa_nmi(cd) { - - log(LOG_CRIT, "\nNMI port 61 %x, port 70 %x\n", inb(0x61), inb(0x70)); - return(0); -} - -/* - * Caught a stray interrupt, notify - */ -isa_strayintr(d) { - - /* DON'T BOTHER FOR NOW! */ - /* for some reason, we get bursts of intr #7, even if not enabled! */ - /* - * Well the reason you got bursts of intr #7 is because someone - * raised an interrupt line and dropped it before the 8259 could - * prioritize it. This is documented in the intel data book. This - * means you have BAD hardware! I have changed this so that only - * the first 5 get logged, then it quits logging them, and puts - * out a special message. rgrimes 3/25/1993 - */ - extern u_long intrcnt_stray; - - intrcnt_stray++; - if (intrcnt_stray <= 5) - log(LOG_ERR,"ISA strayintr %x\n", d); - if (intrcnt_stray == 5) - log(LOG_CRIT,"Too many ISA strayintr not logging any more\n"); -} - -/* - * Wait "n" microseconds. - * Relies on timer 1 counting down from (TIMER_FREQ / hz) at - * (1 * TIMER_FREQ) Hz. - * Note: timer had better have been programmed before this is first used! - * (The standard programming causes the timer to generate a square wave and - * the counter is decremented twice every cycle.) - */ -#define CF (1 * TIMER_FREQ) -#define TIMER_FREQ 1193182 /* XXX - should be elsewhere */ - -extern int hz; /* XXX - should be elsewhere */ - -int DELAY(n) - int n; -{ - int counter_limit; - int prev_tick; - int tick; - int ticks_left; - int sec; - int usec; - -#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). - */ - prev_tick = getit(0, 0); - n -= 20; - - /* - * Calculate (n * (CF / 1e6)) without using floating point and without - * any avoidable overflows. - */ - sec = n / 1000000; - usec = n - sec * 1000000; - ticks_left = sec * CF - + usec * (CF / 1000000) - + usec * ((CF % 1000000) / 1000) / 1000 - + usec * (CF % 1000) / 1000000; - - counter_limit = TIMER_FREQ / hz; - while (ticks_left > 0) { - tick = getit(0, 0); -#ifdef DELAYDEBUG - ++getit_calls; -#endif - if (tick > prev_tick) - ticks_left -= prev_tick - (tick - counter_limit); - else - ticks_left -= prev_tick - tick; - prev_tick = tick; - } -#ifdef DELAYDEBUG - if (state == 1) - printf(" %d calls to getit() at %d usec each\n", - getit_calls, (n + 5) / getit_calls); -#endif -} - -getit(unit, timer) { - int high; - int low; - - /* - * XXX - isa.h defines bogus timers. There's no such timer as - * IO_TIMER_2 = 0x48. There's a timer in the CMOS RAM chip but - * its interface is quite different. Neither timer is an 8252. - * We actually only call this with unit = 0 and timer = 0. It - * could be static... - */ - /* - * Protect ourself against interrupts. - * XXX - sysbeep() and sysbeepstop() need protection. - */ - disable_intr(); - /* - * Latch the count for 'timer' (cc00xxxx, c = counter, x = any). - */ - outb(IO_TIMER1 + 3, timer << 6); - - low = inb(IO_TIMER1 + timer); - high = inb(IO_TIMER1 + timer); - enable_intr(); - return ((high << 8) | low); -} - -static beeping; -static -sysbeepstop(f) -{ - /* disable counter 2 */ - outb(0x61, inb(0x61) & 0xFC); - if (f) - timeout(sysbeepstop, 0, f); - else - beeping = 0; -} - -void sysbeep(int pitch, int period) -{ - - outb(0x61, inb(0x61) | 3); /* enable counter 2 */ - /* - * XXX - move timer stuff to clock.c. - * Program counter 2: - * ccaammmb, c counter, a = access, m = mode, b = BCD - * 1011x110, 11 for aa = LSB then MSB, x11 for mmm = square wave. - */ - outb(0x43, 0xb6); /* set command for counter 2, 2 byte write */ - - outb(0x42, pitch); - outb(0x42, (pitch>>8)); - - if (!beeping) { - beeping = period; - timeout(sysbeepstop, period/2, period); - } -} - -/* - * Pass command to keyboard controller (8042) - */ -unsigned kbc_8042cmd(val) { - - while (inb(KBSTATP)&KBS_IBF); - if (val) outb(KBCMDP, val); - while (inb(KBSTATP)&KBS_IBF); - return (inb(KBDATAP)); -} - -/* - * find an ISA device in a given isa_devtab_* table, given - * the table to search, the expected id_driver entry, and the unit number. - * - * this function is defined in isa_device.h, and this location is debatable; - * i put it there because it's useless w/o, and directly operates on - * the other stuff in that file. - * - */ - -struct isa_device *find_isadev(table, driverp, unit) - struct isa_device *table; - struct isa_driver *driverp; - int unit; -{ - if (driverp == NULL) /* sanity check */ - return NULL; - - while ((table->id_driver != driverp) || (table->id_unit != unit)) { - if (table->id_driver == 0) - return NULL; - - table++; - } - - return table; -} - -/* - * Return nonzero if a (masked) irq is pending for a given device. - */ -int -isa_irq_pending(dvp) - struct isa_device *dvp; -{ - unsigned id_irq; - - id_irq = (unsigned short) dvp->id_irq; /* XXX silly type in struct */ - if (id_irq & 0xff) - return (inb(IO_ICU1) & id_irq); - return (inb(IO_ICU2) & (id_irq >> 8)); -} |
