isa.c revision 3258
14Srgrimes/*- 24Srgrimes * Copyright (c) 1991 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * This code is derived from software contributed to Berkeley by 64Srgrimes * William Jolitz. 74Srgrimes * 84Srgrimes * Redistribution and use in source and binary forms, with or without 94Srgrimes * modification, are permitted provided that the following conditions 104Srgrimes * are met: 114Srgrimes * 1. Redistributions of source code must retain the above copyright 124Srgrimes * notice, this list of conditions and the following disclaimer. 134Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 144Srgrimes * notice, this list of conditions and the following disclaimer in the 154Srgrimes * documentation and/or other materials provided with the distribution. 164Srgrimes * 3. All advertising materials mentioning features or use of this software 174Srgrimes * must display the following acknowledgement: 184Srgrimes * This product includes software developed by the University of 194Srgrimes * California, Berkeley and its contributors. 204Srgrimes * 4. Neither the name of the University nor the names of its contributors 214Srgrimes * may be used to endorse or promote products derived from this software 224Srgrimes * without specific prior written permission. 234Srgrimes * 244Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 254Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 264Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 274Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 284Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 294Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 304Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 314Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 324Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 334Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 344Srgrimes * SUCH DAMAGE. 354Srgrimes * 36593Srgrimes * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 373258Sdg * $Id: isa.c,v 1.26 1994/09/30 05:35:55 swallace Exp $ 384Srgrimes */ 394Srgrimes 404Srgrimes/* 414Srgrimes * code to manage AT bus 424Srgrimes * 434Srgrimes * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 444Srgrimes * Fixed uninitialized variable problem and added code to deal 454Srgrimes * with DMA page boundaries in isa_dmarangecheck(). Fixed word 464Srgrimes * mode DMA count compution and reorganized DMA setup code in 474Srgrimes * isa_dmastart() 484Srgrimes */ 494Srgrimes 502056Swollman#include <sys/param.h> 512056Swollman#include <sys/systm.h> /* isn't it a joy */ 522056Swollman#include <sys/kernel.h> /* to have three of these */ 532056Swollman#include <sys/conf.h> 542056Swollman#include <sys/file.h> 552056Swollman#include <sys/buf.h> 562056Swollman#include <sys/uio.h> 572056Swollman#include <sys/syslog.h> 582056Swollman#include <sys/malloc.h> 592056Swollman#include <sys/rlist.h> 602056Swollman#include <machine/segments.h> 612056Swollman#include <vm/vm.h> 621549Srgrimes#include <machine/spl.h> 632056Swollman#include <i386/isa/isa_device.h> 642056Swollman#include <i386/isa/isa.h> 652056Swollman#include <i386/isa/icu.h> 662056Swollman#include <i386/isa/ic/i8237.h> 672056Swollman#include <i386/isa/ic/i8042.h> 682103Sdg#include "vector.h" 694Srgrimes 704Srgrimes/* 714Srgrimes** Register definitions for DMA controller 1 (channels 0..3): 724Srgrimes*/ 734Srgrimes#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 744Srgrimes#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 754Srgrimes#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 764Srgrimes#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 774Srgrimes 784Srgrimes/* 794Srgrimes** Register definitions for DMA controller 2 (channels 4..7): 804Srgrimes*/ 81630Srgrimes#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 824Srgrimes#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 834Srgrimes#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 844Srgrimes#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 854Srgrimes 862103Sdg/* 872103Sdg * Bits to specify the type and amount of conflict checking. 882103Sdg */ 892103Sdg#define CC_ATTACH (1 << 0) 902103Sdg#define CC_DRQ (1 << 1) 912103Sdg#define CC_IOADDR (1 << 2) 922103Sdg#define CC_IRQ (1 << 3) 932103Sdg#define CC_MEMADDR (1 << 4) 944Srgrimes 954Srgrimes/* 962103Sdg * XXX these defines should be in a central place. 972103Sdg */ 982103Sdg#define read_eflags() ({u_long ef; \ 992103Sdg __asm("pushfl; popl %0" : "=a" (ef)); \ 1002103Sdg ef; }) 1012103Sdg#define write_eflags(ef) __asm("pushl %0; popfl" : : "a" ((u_long)(ef))) 1022103Sdg 1032103Sdgu_long *intr_countp[ICU_LEN]; 1042103Sdginthand2_t *intr_handler[ICU_LEN]; 1052103Sdgu_int intr_mask[ICU_LEN]; 1062103Sdgint intr_unit[ICU_LEN]; 1072103Sdg 1082103Sdgstatic inthand_t *fastintr[ICU_LEN] = { 1092103Sdg &IDTVEC(fastintr0), &IDTVEC(fastintr1), 1102103Sdg &IDTVEC(fastintr2), &IDTVEC(fastintr3), 1112103Sdg &IDTVEC(fastintr4), &IDTVEC(fastintr5), 1122103Sdg &IDTVEC(fastintr6), &IDTVEC(fastintr7), 1132103Sdg &IDTVEC(fastintr8), &IDTVEC(fastintr9), 1142103Sdg &IDTVEC(fastintr10), &IDTVEC(fastintr11), 1152103Sdg &IDTVEC(fastintr12), &IDTVEC(fastintr13), 1162103Sdg &IDTVEC(fastintr14), &IDTVEC(fastintr15) 1172103Sdg}; 1182103Sdg 1192103Sdgstatic inthand_t *slowintr[ICU_LEN] = { 1202103Sdg &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 1212103Sdg &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 1222103Sdg &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 1232103Sdg &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 1242103Sdg}; 1252103Sdg 1262103Sdgstatic void config_isadev __P((struct isa_device *isdp, u_int *mp)); 1272103Sdgstatic void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 1282103Sdg int item, char const *whatnot, char const *reason, 1292103Sdg char const *format)); 1302103Sdgstatic int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 1312103Sdg u_int checkbits)); 1322103Sdgstatic int haveseen_isadev __P((struct isa_device *dvp, u_int checkbits)); 1332103Sdgstatic inthand2_t isa_strayintr; 1342103Sdgstatic void register_imask __P((struct isa_device *dvp, u_int mask)); 1352103Sdg 1362103Sdg/* 137593Srgrimes * print a conflict message 1384Srgrimes */ 1392103Sdgstatic void 1402103Sdgconflict(dvp, tmpdvp, item, whatnot, reason, format) 1412103Sdg struct isa_device *dvp; 1422103Sdg struct isa_device *tmpdvp; 143593Srgrimes int item; 1442103Sdg char const *whatnot; 1452103Sdg char const *reason; 1462103Sdg char const *format; 147593Srgrimes{ 1482103Sdg printf("%s%d not %sed due to %s conflict with %s%d at ", 1492103Sdg dvp->id_driver->name, dvp->id_unit, whatnot, reason, 150593Srgrimes tmpdvp->id_driver->name, tmpdvp->id_unit); 151593Srgrimes printf(format, item); 152593Srgrimes printf("\n"); 1534Srgrimes} 1544Srgrimes 1554Srgrimes/* 156593Srgrimes * Check to see if things are alread in use, like IRQ's, I/O addresses 157593Srgrimes * and Memory addresses. 1584Srgrimes */ 1592103Sdgstatic int 1602103Sdghaveseen(dvp, tmpdvp, checkbits) 1612103Sdg struct isa_device *dvp; 1622103Sdg struct isa_device *tmpdvp; 1632103Sdg u_int checkbits; 1644Srgrimes{ 165593Srgrimes int status = 0; 1664Srgrimes 167593Srgrimes /* 168593Srgrimes * Only check against devices that have already been found 169593Srgrimes */ 170593Srgrimes if (tmpdvp->id_alive) { 1712103Sdg char const *whatnot; 1722103Sdg 1732466Sats whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 174593Srgrimes /* 175593Srgrimes * Check for I/O address conflict. We can only check the 176593Srgrimes * starting address of the device against the range of the 177593Srgrimes * device that has already been probed since we do not 178593Srgrimes * know how many I/O addresses this device uses. 179593Srgrimes */ 1802103Sdg if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 181593Srgrimes if ((dvp->id_iobase >= tmpdvp->id_iobase) && 182593Srgrimes (dvp->id_iobase <= 183593Srgrimes (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 1842103Sdg conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 185593Srgrimes "I/O address", "0x%x"); 186593Srgrimes status = 1; 187593Srgrimes } 1884Srgrimes } 189593Srgrimes /* 190593Srgrimes * Check for Memory address conflict. We can check for 191593Srgrimes * range overlap, but it will not catch all cases since the 192593Srgrimes * driver may adjust the msize paramater during probe, for 193593Srgrimes * now we just check that the starting address does not 194593Srgrimes * fall within any allocated region. 195593Srgrimes * XXX could add a second check after the probe for overlap, 196593Srgrimes * since at that time we would know the full range. 197593Srgrimes * XXX KERNBASE is a hack, we should have vaddr in the table! 198593Srgrimes */ 1992103Sdg if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 2002103Sdg if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 2012103Sdg (KERNBASE + dvp->id_maddr <= 2022103Sdg (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 2032103Sdg conflict(dvp, tmpdvp, (int)dvp->id_maddr, 2042103Sdg whatnot, "maddr", "0x%x"); 205593Srgrimes status = 1; 2064Srgrimes } 207593Srgrimes } 208593Srgrimes /* 209593Srgrimes * Check for IRQ conflicts. 210593Srgrimes */ 2112103Sdg if (checkbits & CC_IRQ && tmpdvp->id_irq) { 212593Srgrimes if (tmpdvp->id_irq == dvp->id_irq) { 213593Srgrimes conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 2142103Sdg whatnot, "irq", "%d"); 215593Srgrimes status = 1; 2164Srgrimes } 217593Srgrimes } 218593Srgrimes /* 219593Srgrimes * Check for DRQ conflicts. 220593Srgrimes */ 2212103Sdg if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 222593Srgrimes if (tmpdvp->id_drq == dvp->id_drq) { 2232103Sdg conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 2242103Sdg "drq", "%d"); 225593Srgrimes status = 1; 2264Srgrimes } 227593Srgrimes } 228593Srgrimes } 229593Srgrimes return (status); 230593Srgrimes} 2314Srgrimes 232593Srgrimes/* 233593Srgrimes * Search through all the isa_devtab_* tables looking for anything that 234593Srgrimes * conflicts with the current device. 235593Srgrimes */ 2362103Sdgstatic int 2372103Sdghaveseen_isadev(dvp, checkbits) 238593Srgrimes struct isa_device *dvp; 2392103Sdg u_int checkbits; 240593Srgrimes{ 241593Srgrimes struct isa_device *tmpdvp; 242593Srgrimes int status = 0; 2434Srgrimes 2442103Sdg for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) 2452103Sdg status |= haveseen(dvp, tmpdvp, checkbits); 2462103Sdg for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) 2472103Sdg status |= haveseen(dvp, tmpdvp, checkbits); 2482103Sdg for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) 2492103Sdg status |= haveseen(dvp, tmpdvp, checkbits); 2502103Sdg for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) 2512103Sdg status |= haveseen(dvp, tmpdvp, checkbits); 252593Srgrimes return(status); 2534Srgrimes} 254593Srgrimes 2554Srgrimes/* 2564Srgrimes * Configure all ISA devices 2574Srgrimes */ 258593Srgrimesvoid 2594Srgrimesisa_configure() { 2604Srgrimes struct isa_device *dvp; 2614Srgrimes 2622103Sdg splhigh(); 2634Srgrimes enable_intr(); 2644Srgrimes INTREN(IRQ_SLAVE); 265593Srgrimes printf("Probing for devices on the ISA bus:\n"); 2662103Sdg for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 2672103Sdg config_isadev(dvp, &tty_imask); 2682103Sdg for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 2692103Sdg config_isadev(dvp, &bio_imask); 2702103Sdg for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 2712103Sdg config_isadev(dvp, &net_imask); 2722103Sdg for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 2732103Sdg config_isadev(dvp, (u_int *)NULL); 2741321Sdg bio_imask |= SWI_CLOCK_MASK; 2751321Sdg net_imask |= SWI_NET_MASK; 2761321Sdg tty_imask |= SWI_TTY_MASK; 2771321Sdg 278593Srgrimes/* 2791321Sdg * XXX we should really add the tty device to net_imask when the line is 280593Srgrimes * switched to SLIPDISC, and then remove it when it is switched away from 2811321Sdg * SLIPDISC. No need to block out ALL ttys during a splimp when only one 282593Srgrimes * of them is running slip. 2831321Sdg * 2841321Sdg * XXX actually, blocking all ttys during a splimp doesn't matter so much 2851321Sdg * with sio because the serial interrupt layer doesn't use tty_imask. Only 2861321Sdg * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 2871321Sdg * during spltty. 288593Srgrimes */ 2894Srgrimes#include "sl.h" 2904Srgrimes#if NSL > 0 2911321Sdg net_imask |= tty_imask; 2921321Sdg tty_imask = net_imask; 2934Srgrimes#endif 2941321Sdg /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 2951321Sdg#ifdef DIAGNOSTIC 2961321Sdg printf("bio_imask %x tty_imask %x net_imask %x\n", 2971321Sdg bio_imask, tty_imask, net_imask); 2981321Sdg#endif 2992103Sdg /* 3002103Sdg * Finish initializing intr_mask[]. Note that the partly 3012103Sdg * constructed masks aren't actually used since we're at splhigh. 3022103Sdg * For fully dynamic initialization, register_intr() and 3032103Sdg * unregister_intr() will have to adjust the masks for _all_ 3042103Sdg * interrupts and for tty_imask, etc. 3052103Sdg */ 3062103Sdg for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 3072103Sdg register_imask(dvp, tty_imask); 3082103Sdg for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 3092103Sdg register_imask(dvp, bio_imask); 3102103Sdg for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 3112103Sdg register_imask(dvp, net_imask); 3122103Sdg for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 3132103Sdg register_imask(dvp, SWI_CLOCK_MASK); 3142918Sbde spl0(); 3154Srgrimes} 3164Srgrimes 3174Srgrimes/* 3184Srgrimes * Configure an ISA device. 3194Srgrimes */ 3203258Sdg 3213258Sdg 3223258Sdgstatic void config_isadev_c(); 3233258Sdg 3242103Sdgstatic void 3254Srgrimesconfig_isadev(isdp, mp) 3263258Sdg struct isa_device *isdp; 3273258Sdg u_int *mp; 3283258Sdg{ 3293258Sdg config_isadev_c(isdp, mp, 0); 3303258Sdg} 3313258Sdg 3323258Sdgvoid 3333258Sdgreconfig_isadev(isdp, mp) 3344Srgrimes struct isa_device *isdp; 3354Srgrimes u_int *mp; 3364Srgrimes{ 3373258Sdg config_isadev_c(isdp, mp, 1); 3383258Sdg} 3393258Sdg 3403258Sdgstatic void 3413258Sdgconfig_isadev_c(isdp, mp, reconfig) 3423258Sdg struct isa_device *isdp; 3433258Sdg u_int *mp; 3443258Sdg int reconfig; 3453258Sdg{ 3462103Sdg u_int checkbits; 3472103Sdg int id_alive; 3483258Sdg int last_alive; 349593Srgrimes struct isa_driver *dp = isdp->id_driver; 3504Srgrimes 3512103Sdg checkbits = 0; 3523224Sswallace#ifndef ALLOW_CONFLICT_IRQ 3533224Sswallace checkbits |= CC_IRQ; 3543224Sswallace#endif 3552103Sdg#ifndef ALLOW_CONFLICT_DRQ 3562103Sdg checkbits |= CC_DRQ; 3572103Sdg#endif 3582103Sdg#ifndef ALLOW_CONFLICT_IOADDR 3592103Sdg checkbits |= CC_IOADDR; 3602103Sdg#endif 3612103Sdg#ifndef ALLOW_CONFLICT_MEMADDR 3622103Sdg checkbits |= CC_MEMADDR; 3632103Sdg#endif 3643258Sdg if (!reconfig && haveseen_isadev(isdp, checkbits)) 3652103Sdg return; 3663258Sdg if (!reconfig && isdp->id_maddr) { 367593Srgrimes isdp->id_maddr -= 0xa0000; /* XXX should be a define */ 368593Srgrimes isdp->id_maddr += atdevbase; 369593Srgrimes } 3703258Sdg if (reconfig) { 3713258Sdg last_alive = isdp->id_alive; 3723258Sdg } 3733258Sdg else { 3743258Sdg last_alive = 0; 3753258Sdg } 3762103Sdg id_alive = (*dp->probe)(isdp); 3772103Sdg if (id_alive) { 378593Srgrimes /* 379593Srgrimes * Only print the I/O address range if id_alive != -1 380593Srgrimes * Right now this is a temporary fix just for the new 381593Srgrimes * NPX code so that if it finds a 486 that can use trap 382593Srgrimes * 16 it will not report I/O addresses. 383593Srgrimes * Rod Grimes 04/26/94 384593Srgrimes */ 3853258Sdg if (!isdp->id_reconfig) { 3863258Sdg printf("%s%d", dp->name, isdp->id_unit); 3873258Sdg if (id_alive != -1) { 3883258Sdg printf(" at 0x%x", isdp->id_iobase); 3893258Sdg if ((isdp->id_iobase + id_alive - 1) != 3903258Sdg isdp->id_iobase) { 3913258Sdg printf("-0x%x", 3923258Sdg isdp->id_iobase + id_alive - 1); 3933258Sdg } 394593Srgrimes } 3953258Sdg if (isdp->id_irq) 3963258Sdg printf(" irq %d", ffs(isdp->id_irq) - 1); 3973258Sdg if (isdp->id_drq != -1) 3983258Sdg printf(" drq %d", isdp->id_drq); 3993258Sdg if (isdp->id_maddr) 4003258Sdg printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 4013258Sdg if (isdp->id_msize) 4023258Sdg printf(" msize %d", isdp->id_msize); 4033258Sdg if (isdp->id_flags) 4043258Sdg printf(" flags 0x%x", isdp->id_flags); 4053258Sdg if (isdp->id_iobase) { 4063258Sdg if (isdp->id_iobase < 0x100) { 4073258Sdg printf(" on motherboard\n"); 4081002Srgrimes } else { 4093258Sdg if (isdp->id_iobase >= 0x1000) { 4103258Sdg printf (" on eisa\n"); 4113258Sdg } else { 4123258Sdg printf (" on isa\n"); 4133258Sdg } 4141002Srgrimes } 4151002Srgrimes } 4163258Sdg /* 4173258Sdg * Check for conflicts again. The driver may have 4183258Sdg * changed *dvp. We should weaken the early check 4193258Sdg * since the driver may have been able to change 4203258Sdg * *dvp to avoid conflicts if given a chance. We 4213258Sdg * already skip the early check for IRQs and force 4223258Sdg * a check for IRQs in the next group of checks. 4233258Sdg */ 4243224Sswallace#ifndef ALLOW_CONFLICT_IRQ 4253258Sdg checkbits |= CC_IRQ; 4263224Sswallace#endif 4273258Sdg if (haveseen_isadev(isdp, checkbits)) 4283258Sdg return; 4293258Sdg isdp->id_alive = id_alive; 4303258Sdg } 431593Srgrimes (*dp->attach)(isdp); 4322103Sdg if (isdp->id_irq) { 4332103Sdg if (mp) 4342103Sdg INTRMASK(*mp, isdp->id_irq); 4352103Sdg register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 4362103Sdg isdp->id_ri_flags, isdp->id_intr, 4372103Sdg mp ? *mp : 0, isdp->id_unit); 438593Srgrimes INTREN(isdp->id_irq); 4394Srgrimes } 440593Srgrimes } else { 4413258Sdg if (isdp->id_reconfig) { 4423258Sdg (*dp->attach)(isdp); /* reconfiguration attach */ 443593Srgrimes } 4443258Sdg if (!last_alive) { 4453258Sdg if (!isdp->id_reconfig) { 4463258Sdg printf("%s%d not found", dp->name, isdp->id_unit); 4473258Sdg if (isdp->id_iobase) { 4483258Sdg printf(" at 0x%x", isdp->id_iobase); 4493258Sdg } 4503258Sdg printf("\n"); 4513258Sdg } 4523258Sdg } 4533258Sdg else { 4543258Sdg /* This code has not been tested.... */ 4553258Sdg if (isdp->id_irq) { 4563258Sdg INTRDIS(isdp->id_irq); 4573258Sdg unregister_intr(ffs(isdp->id_irq) - 1, 4583258Sdg isdp->id_intr); 4593258Sdg if (mp) 4603258Sdg INTRUNMASK(*mp, isdp->id_irq); 4613258Sdg } 4623258Sdg } 463593Srgrimes } 4644Srgrimes} 4654Srgrimes 4664Srgrimes/* 4674Srgrimes * Fill in default interrupt table (in case of spuruious interrupt 4684Srgrimes * during configuration of kernel, setup interrupt control unit 4694Srgrimes */ 470798Swollmanvoid 471798Swollmanisa_defaultirq() 472798Swollman{ 4734Srgrimes int i; 4744Srgrimes 4754Srgrimes /* icu vectors */ 4761321Sdg for (i = 0; i < ICU_LEN; i++) 4772103Sdg unregister_intr(i, (inthand2_t *)NULL); 4784Srgrimes 4794Srgrimes /* initialize 8259's */ 4804Srgrimes outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 4814Srgrimes outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 4824Srgrimes outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 4834Srgrimes#ifdef AUTO_EOI_1 4844Srgrimes outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 4854Srgrimes#else 4864Srgrimes outb(IO_ICU1+1, 1); /* 8086 mode */ 4874Srgrimes#endif 4884Srgrimes outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 4894Srgrimes outb(IO_ICU1, 0x0a); /* default to IRR on read */ 4904Srgrimes outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 4914Srgrimes 4924Srgrimes outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 4934Srgrimes outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 4944Srgrimes outb(IO_ICU2+1,2); /* my slave id is 2 */ 4954Srgrimes#ifdef AUTO_EOI_2 4964Srgrimes outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 4974Srgrimes#else 4984Srgrimes outb(IO_ICU2+1,1); /* 8086 mode */ 4994Srgrimes#endif 5004Srgrimes outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 5014Srgrimes outb(IO_ICU2, 0x0a); /* default to IRR on read */ 5024Srgrimes} 5034Srgrimes 5044Srgrimes/* region of physical memory known to be contiguous */ 5054Srgrimesvm_offset_t isaphysmem; 5064Srgrimesstatic caddr_t dma_bounce[8]; /* XXX */ 5074Srgrimesstatic char bounced[8]; /* XXX */ 5084Srgrimes#define MAXDMASZ 512 /* XXX */ 5094Srgrimes 5104Srgrimes/* high byte of address is stored in this port for i-th dma channel */ 5114Srgrimesstatic short dmapageport[8] = 5124Srgrimes { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 5134Srgrimes 5144Srgrimes/* 5154Srgrimes * isa_dmacascade(): program 8237 DMA controller channel to accept 5164Srgrimes * external dma control by a board. 5174Srgrimes */ 5184Srgrimesvoid isa_dmacascade(unsigned chan) 5194Srgrimes{ 5204Srgrimes if (chan > 7) 5214Srgrimes panic("isa_dmacascade: impossible request"); 5224Srgrimes 5234Srgrimes /* set dma channel mode, and set dma channel mode */ 5244Srgrimes if ((chan & 4) == 0) { 5254Srgrimes outb(DMA1_MODE, DMA37MD_CASCADE | chan); 5264Srgrimes outb(DMA1_SMSK, chan); 5274Srgrimes } else { 5284Srgrimes outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 5294Srgrimes outb(DMA2_SMSK, chan & 3); 5304Srgrimes } 5314Srgrimes} 5324Srgrimes 5332103Sdgstatic int 5342103Sdgisa_dmarangecheck(caddr_t va, unsigned length, unsigned chan); 5352103Sdg 5364Srgrimes/* 5374Srgrimes * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 5384Srgrimes * problems by using a bounce buffer. 5394Srgrimes */ 5404Srgrimesvoid isa_dmastart(int flags, caddr_t addr, unsigned nbytes, unsigned chan) 5414Srgrimes{ vm_offset_t phys; 5424Srgrimes int waport; 5434Srgrimes caddr_t newaddr; 5444Srgrimes 5454Srgrimes if ( chan > 7 5464Srgrimes || (chan < 4 && nbytes > (1<<16)) 5474Srgrimes || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 5484Srgrimes panic("isa_dmastart: impossible request"); 5494Srgrimes 5504Srgrimes if (isa_dmarangecheck(addr, nbytes, chan)) { 5514Srgrimes if (dma_bounce[chan] == 0) 5524Srgrimes dma_bounce[chan] = 5534Srgrimes /*(caddr_t)malloc(MAXDMASZ, M_TEMP, M_WAITOK);*/ 5544Srgrimes (caddr_t) isaphysmem + NBPG*chan; 5554Srgrimes bounced[chan] = 1; 5564Srgrimes newaddr = dma_bounce[chan]; 5574Srgrimes *(int *) newaddr = 0; /* XXX */ 5584Srgrimes 5594Srgrimes /* copy bounce buffer on write */ 5604Srgrimes if (!(flags & B_READ)) 5614Srgrimes bcopy(addr, newaddr, nbytes); 5624Srgrimes addr = newaddr; 5634Srgrimes } 5644Srgrimes 5654Srgrimes /* translate to physical */ 5664Srgrimes phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 5674Srgrimes 5684Srgrimes if ((chan & 4) == 0) { 5694Srgrimes /* 5704Srgrimes * Program one of DMA channels 0..3. These are 5714Srgrimes * byte mode channels. 5724Srgrimes */ 5734Srgrimes /* set dma channel mode, and reset address ff */ 5744Srgrimes if (flags & B_READ) 5754Srgrimes outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 5764Srgrimes else 5774Srgrimes outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 5784Srgrimes outb(DMA1_FFC, 0); 5794Srgrimes 5804Srgrimes /* send start address */ 5814Srgrimes waport = DMA1_CHN(chan); 5824Srgrimes outb(waport, phys); 5834Srgrimes outb(waport, phys>>8); 5844Srgrimes outb(dmapageport[chan], phys>>16); 5854Srgrimes 5864Srgrimes /* send count */ 5874Srgrimes outb(waport + 1, --nbytes); 5884Srgrimes outb(waport + 1, nbytes>>8); 5894Srgrimes 5904Srgrimes /* unmask channel */ 5914Srgrimes outb(DMA1_SMSK, chan); 5924Srgrimes } else { 5934Srgrimes /* 5944Srgrimes * Program one of DMA channels 4..7. These are 5954Srgrimes * word mode channels. 5964Srgrimes */ 5974Srgrimes /* set dma channel mode, and reset address ff */ 5984Srgrimes if (flags & B_READ) 5994Srgrimes outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 6004Srgrimes else 6014Srgrimes outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 6024Srgrimes outb(DMA2_FFC, 0); 6034Srgrimes 6044Srgrimes /* send start address */ 6054Srgrimes waport = DMA2_CHN(chan - 4); 6064Srgrimes outb(waport, phys>>1); 6074Srgrimes outb(waport, phys>>9); 6084Srgrimes outb(dmapageport[chan], phys>>16); 6094Srgrimes 6104Srgrimes /* send count */ 6114Srgrimes nbytes >>= 1; 6124Srgrimes outb(waport + 2, --nbytes); 6134Srgrimes outb(waport + 2, nbytes>>8); 6144Srgrimes 6154Srgrimes /* unmask channel */ 6164Srgrimes outb(DMA2_SMSK, chan & 3); 6174Srgrimes } 6184Srgrimes} 6194Srgrimes 6204Srgrimesvoid isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 6214Srgrimes{ 6224Srgrimes 6234Srgrimes /* copy bounce buffer on read */ 6244Srgrimes /*if ((flags & (B_PHYS|B_READ)) == (B_PHYS|B_READ))*/ 6254Srgrimes if (bounced[chan]) { 6264Srgrimes bcopy(dma_bounce[chan], addr, nbytes); 6274Srgrimes bounced[chan] = 0; 6284Srgrimes } 6294Srgrimes} 6304Srgrimes 6314Srgrimes/* 6324Srgrimes * Check for problems with the address range of a DMA transfer 6334Srgrimes * (non-contiguous physical pages, outside of bus address space, 6344Srgrimes * crossing DMA page boundaries). 6354Srgrimes * Return true if special handling needed. 6364Srgrimes */ 6374Srgrimes 6382103Sdgstatic int 6394Srgrimesisa_dmarangecheck(caddr_t va, unsigned length, unsigned chan) { 6404Srgrimes vm_offset_t phys, priorpage = 0, endva; 6414Srgrimes u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 6424Srgrimes 6434Srgrimes endva = (vm_offset_t)round_page(va + length); 6444Srgrimes for (; va < (caddr_t) endva ; va += NBPG) { 6454Srgrimes phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 6464Srgrimes#define ISARAM_END RAM_END 6474Srgrimes if (phys == 0) 6484Srgrimes panic("isa_dmacheck: no physical page present"); 6491323Sache if (phys >= ISARAM_END) 6504Srgrimes return (1); 6514Srgrimes if (priorpage) { 6524Srgrimes if (priorpage + NBPG != phys) 6534Srgrimes return (1); 6544Srgrimes /* check if crossing a DMA page boundary */ 6554Srgrimes if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 6564Srgrimes return (1); 6574Srgrimes } 6584Srgrimes priorpage = phys; 6594Srgrimes } 6604Srgrimes return (0); 6614Srgrimes} 6624Srgrimes 6634Srgrimes/* head of queue waiting for physmem to become available */ 6644Srgrimesstruct buf isa_physmemq; 6654Srgrimes 6664Srgrimes/* blocked waiting for resource to become free for exclusive use */ 6674Srgrimesstatic isaphysmemflag; 6684Srgrimes/* if waited for and call requested when free (B_CALL) */ 6694Srgrimesstatic void (*isaphysmemunblock)(); /* needs to be a list */ 6704Srgrimes 6714Srgrimes/* 6724Srgrimes * Allocate contiguous physical memory for transfer, returning 6734Srgrimes * a *virtual* address to region. May block waiting for resource. 6744Srgrimes * (assumed to be called at splbio()) 6754Srgrimes */ 6764Srgrimescaddr_t 6774Srgrimesisa_allocphysmem(caddr_t va, unsigned length, void (*func)()) { 6784Srgrimes 6794Srgrimes isaphysmemunblock = func; 6804Srgrimes while (isaphysmemflag & B_BUSY) { 6814Srgrimes isaphysmemflag |= B_WANTED; 682798Swollman tsleep((caddr_t)&isaphysmemflag, PRIBIO, "isaphys", 0); 6834Srgrimes } 6844Srgrimes isaphysmemflag |= B_BUSY; 6854Srgrimes 6864Srgrimes return((caddr_t)isaphysmem); 6874Srgrimes} 6884Srgrimes 6894Srgrimes/* 6904Srgrimes * Free contiguous physical memory used for transfer. 6914Srgrimes * (assumed to be called at splbio()) 6924Srgrimes */ 6934Srgrimesvoid 6944Srgrimesisa_freephysmem(caddr_t va, unsigned length) { 6954Srgrimes 6964Srgrimes isaphysmemflag &= ~B_BUSY; 6974Srgrimes if (isaphysmemflag & B_WANTED) { 6984Srgrimes isaphysmemflag &= B_WANTED; 699798Swollman wakeup((caddr_t)&isaphysmemflag); 7004Srgrimes if (isaphysmemunblock) 7014Srgrimes (*isaphysmemunblock)(); 7024Srgrimes } 7034Srgrimes} 7044Srgrimes 7052001Swollman#define NMI_PARITY (1 << 7) 7062001Swollman#define NMI_IOCHAN (1 << 6) 7072001Swollman#define ENMI_WATCHDOG (1 << 7) 7082001Swollman#define ENMI_BUSTIMER (1 << 6) 7092001Swollman#define ENMI_IOSTATUS (1 << 5) 7102001Swollman 7114Srgrimes/* 7124Srgrimes * Handle a NMI, possibly a machine check. 7134Srgrimes * return true to panic system, false to ignore. 7144Srgrimes */ 715798Swollmanint 716798Swollmanisa_nmi(cd) 717798Swollman int cd; 718798Swollman{ 7192001Swollman int isa_port = inb(0x61); 7202001Swollman int eisa_port = inb(0x461); 7212001Swollman if(isa_port & NMI_PARITY) { 7222001Swollman panic("RAM parity error, likely hardware failure."); 7232001Swollman } else if(isa_port & NMI_IOCHAN) { 7242001Swollman panic("I/O channel check, likely hardware failure."); 7252001Swollman } else if(eisa_port & ENMI_WATCHDOG) { 7262001Swollman panic("EISA watchdog timer expired, likely hardware failure."); 7272001Swollman } else if(eisa_port & ENMI_BUSTIMER) { 7282001Swollman panic("EISA bus timeout, likely hardware failure."); 7292001Swollman } else if(eisa_port & ENMI_IOSTATUS) { 7302001Swollman panic("EISA I/O port status error."); 7312001Swollman } else { 7322001Swollman printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 7332001Swollman return(0); 7342001Swollman } 7354Srgrimes} 7364Srgrimes 7374Srgrimes/* 7384Srgrimes * Caught a stray interrupt, notify 7394Srgrimes */ 7402103Sdgstatic void 741798Swollmanisa_strayintr(d) 742798Swollman int d; 743798Swollman{ 7444Srgrimes 7454Srgrimes /* DON'T BOTHER FOR NOW! */ 7464Srgrimes /* for some reason, we get bursts of intr #7, even if not enabled! */ 7474Srgrimes /* 7484Srgrimes * Well the reason you got bursts of intr #7 is because someone 7494Srgrimes * raised an interrupt line and dropped it before the 8259 could 7504Srgrimes * prioritize it. This is documented in the intel data book. This 7514Srgrimes * means you have BAD hardware! I have changed this so that only 7524Srgrimes * the first 5 get logged, then it quits logging them, and puts 7534Srgrimes * out a special message. rgrimes 3/25/1993 7544Srgrimes */ 7552103Sdg /* 7562103Sdg * XXX TODO print a different message for #7 if it is for a 7572103Sdg * glitch. Glitches can be distinguished from real #7's by 7582103Sdg * testing that the in-service bit is _not_ set. The test 7592103Sdg * must be done before sending an EOI so it can't be done if 7602103Sdg * we are using AUTO_EOI_1. 7612103Sdg */ 7622103Sdg if (intrcnt[NR_DEVICES + d] <= 5) 7632103Sdg log(LOG_ERR, "stray irq %d\n", d); 7642103Sdg if (intrcnt[NR_DEVICES + d] == 5) 7652103Sdg log(LOG_CRIT, 7662103Sdg "too many stray irq %d's; not logging any more\n", d); 7674Srgrimes} 7684Srgrimes 7694Srgrimes/* 7704Srgrimes * find an ISA device in a given isa_devtab_* table, given 7714Srgrimes * the table to search, the expected id_driver entry, and the unit number. 7724Srgrimes * 7734Srgrimes * this function is defined in isa_device.h, and this location is debatable; 7744Srgrimes * i put it there because it's useless w/o, and directly operates on 7754Srgrimes * the other stuff in that file. 7764Srgrimes * 7774Srgrimes */ 7784Srgrimes 7794Srgrimesstruct isa_device *find_isadev(table, driverp, unit) 7804Srgrimes struct isa_device *table; 7814Srgrimes struct isa_driver *driverp; 7824Srgrimes int unit; 7834Srgrimes{ 7844Srgrimes if (driverp == NULL) /* sanity check */ 7854Srgrimes return NULL; 7864Srgrimes 7874Srgrimes while ((table->id_driver != driverp) || (table->id_unit != unit)) { 7884Srgrimes if (table->id_driver == 0) 7894Srgrimes return NULL; 7904Srgrimes 7914Srgrimes table++; 7924Srgrimes } 7934Srgrimes 7944Srgrimes return table; 7954Srgrimes} 7964Srgrimes 7974Srgrimes/* 7984Srgrimes * Return nonzero if a (masked) irq is pending for a given device. 7994Srgrimes */ 8004Srgrimesint 8014Srgrimesisa_irq_pending(dvp) 8024Srgrimes struct isa_device *dvp; 8034Srgrimes{ 8044Srgrimes unsigned id_irq; 8054Srgrimes 8062103Sdg id_irq = dvp->id_irq; 8074Srgrimes if (id_irq & 0xff) 8084Srgrimes return (inb(IO_ICU1) & id_irq); 8094Srgrimes return (inb(IO_ICU2) & (id_irq >> 8)); 8104Srgrimes} 8112103Sdg 8122103Sdgint 8132103Sdgregister_intr(intr, device_id, flags, handler, mask, unit) 8142103Sdg int intr; 8152103Sdg int device_id; 8162103Sdg u_int flags; 8172103Sdg inthand2_t *handler; 8182103Sdg u_int mask; 8192103Sdg int unit; 8202103Sdg{ 8212103Sdg char *cp; 8222103Sdg u_long ef; 8232103Sdg int id; 8242103Sdg 8252103Sdg if ((u_int)intr >= ICU_LEN || intr == 2 8262103Sdg || (u_int)device_id >= NR_DEVICES) 8272103Sdg return (EINVAL); 8282103Sdg if (intr_handler[intr] != isa_strayintr) 8292103Sdg return (EBUSY); 8302103Sdg ef = read_eflags(); 8312103Sdg disable_intr(); 8322103Sdg intr_countp[intr] = &intrcnt[device_id]; 8332103Sdg intr_handler[intr] = handler; 8342103Sdg intr_mask[intr] = mask | (1 << intr); 8352103Sdg intr_unit[intr] = unit; 8362103Sdg setidt(ICU_OFFSET + intr, 8372103Sdg flags & RI_FAST ? fastintr[intr] : slowintr[intr], 8382103Sdg SDT_SYS386IGT, SEL_KPL); 8392103Sdg write_eflags(ef); 8402103Sdg for (cp = intrnames, id = 0; id <= device_id; id++) 8412103Sdg while (*cp++ != '\0') 8422103Sdg ; 8432103Sdg if (cp > eintrnames) 8442103Sdg return (0); 8452103Sdg if (intr < 10) { 8462103Sdg cp[-3] = intr + '0'; 8472103Sdg cp[-2] = ' '; 8482103Sdg } else { 8492103Sdg cp[-3] = '1'; 8502103Sdg cp[-2] = intr - 10 + '0'; 8512103Sdg } 8522103Sdg return (0); 8532103Sdg} 8542103Sdg 8552103Sdgstatic void 8562103Sdgregister_imask(dvp, mask) 8572103Sdg struct isa_device *dvp; 8582103Sdg u_int mask; 8592103Sdg{ 8602103Sdg if (dvp->id_alive && dvp->id_irq) { 8612103Sdg int intr; 8622103Sdg 8632103Sdg intr = ffs(dvp->id_irq) - 1; 8642103Sdg intr_mask[intr] = mask | (1 <<intr); 8652103Sdg } 8662103Sdg} 8672103Sdg 8682103Sdgint 8692103Sdgunregister_intr(intr, handler) 8702103Sdg int intr; 8712103Sdg inthand2_t *handler; 8722103Sdg{ 8732103Sdg u_long ef; 8742103Sdg 8752103Sdg if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 8762103Sdg return (EINVAL); 8772103Sdg ef = read_eflags(); 8782103Sdg disable_intr(); 8792103Sdg intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 8802103Sdg intr_handler[intr] = isa_strayintr; 8812103Sdg intr_mask[intr] = HWI_MASK | SWI_MASK; 8822103Sdg intr_unit[intr] = intr; 8832103Sdg setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL); 8842103Sdg write_eflags(ef); 8852103Sdg return (0); 8862103Sdg} 887