isa.c revision 1323
1214640Sdim/*- 2214640Sdim * Copyright (c) 1991 The Regents of the University of California. 3214640Sdim * All rights reserved. 4214640Sdim * 5214640Sdim * This code is derived from software contributed to Berkeley by 6214640Sdim * William Jolitz. 7214640Sdim * 8214640Sdim * Redistribution and use in source and binary forms, with or without 9214640Sdim * modification, are permitted provided that the following conditions 10214640Sdim * are met: 11214640Sdim * 1. Redistributions of source code must retain the above copyright 12214640Sdim * notice, this list of conditions and the following disclaimer. 13214640Sdim * 2. Redistributions in binary form must reproduce the above copyright 14214640Sdim * notice, this list of conditions and the following disclaimer in the 15214640Sdim * documentation and/or other materials provided with the distribution. 16214640Sdim * 3. All advertising materials mentioning features or use of this software 17214640Sdim * must display the following acknowledgement: 18214640Sdim * This product includes software developed by the University of 19214640Sdim * California, Berkeley and its contributors. 20214640Sdim * 4. Neither the name of the University nor the names of its contributors 21214640Sdim * may be used to endorse or promote products derived from this software 22214640Sdim * without specific prior written permission. 23214640Sdim * 24214640Sdim * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25214640Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26214640Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27214640Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28214640Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29214640Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30214640Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31214640Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32214640Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33214640Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34214640Sdim * SUCH DAMAGE. 35214640Sdim * 36214640Sdim * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 37214640Sdim * $Id: isa.c,v 1.15 1994/04/02 07:00:46 davidg Exp $ 38214640Sdim */ 39214640Sdim 40214640Sdim/* 41214640Sdim * code to manage AT bus 42214640Sdim * 43214640Sdim * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44214640Sdim * Fixed uninitialized variable problem and added code to deal 45214640Sdim * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46214640Sdim * mode DMA count compution and reorganized DMA setup code in 47214640Sdim * isa_dmastart() 48214640Sdim */ 49214640Sdim 50214640Sdim#include "param.h" 51214640Sdim#include "systm.h" /* isn't it a joy */ 52214640Sdim#include "kernel.h" /* to have three of these */ 53214640Sdim#include "conf.h" 54214640Sdim#include "file.h" 55214640Sdim#include "buf.h" 56214640Sdim#include "uio.h" 57214640Sdim#include "syslog.h" 58214640Sdim#include "malloc.h" 59214640Sdim#include "rlist.h" 60214640Sdim#include "machine/segments.h" 61214640Sdim#include "vm/vm.h" 62214640Sdim#include "i386/isa/isa_device.h" 63214640Sdim#include "i386/isa/isa.h" 64214640Sdim#include "i386/isa/icu.h" 65214640Sdim#include "i386/isa/ic/i8237.h" 66214640Sdim#include "i386/isa/ic/i8042.h" 67214640Sdim 68214640Sdim/* 69214640Sdim** Register definitions for DMA controller 1 (channels 0..3): 70214640Sdim*/ 71214640Sdim#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 72214640Sdim#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 73214640Sdim#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 74214640Sdim#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 75214640Sdim 76214640Sdim/* 77214640Sdim** Register definitions for DMA controller 2 (channels 4..7): 78214640Sdim*/ 79214640Sdim#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 80214640Sdim#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 81214640Sdim#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 82214640Sdim#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 83214640Sdim 84214640Sdimvoid config_isadev __P((struct isa_device *, u_int *)); 85214640Sdim 86214640Sdim/* 87214640Sdim * print a conflict message 88214640Sdim */ 89214640Sdimvoid 90214640Sdimconflict(dvp, tmpdvp, item, reason, format) 91214640Sdim struct isa_device *dvp, *tmpdvp; 92214640Sdim int item; 93214640Sdim char *reason; 94214640Sdim char *format; 95214640Sdim{ 96214640Sdim printf("%s%d not probed due to %s conflict with %s%d at ", 97214640Sdim dvp->id_driver->name, dvp->id_unit, reason, 98214640Sdim tmpdvp->id_driver->name, tmpdvp->id_unit); 99214640Sdim printf(format, item); 100214640Sdim printf("\n"); 101214640Sdim} 102214640Sdim 103214640Sdim/* 104214640Sdim * Check to see if things are alread in use, like IRQ's, I/O addresses 105214640Sdim * and Memory addresses. 106214640Sdim */ 107214640Sdimint 108214640Sdimhaveseen(dvp, tmpdvp) 109214640Sdim struct isa_device *dvp, *tmpdvp; 110214640Sdim{ 111214640Sdim int status = 0; 112214640Sdim 113214640Sdim /* 114214640Sdim * Only check against devices that have already been found 115214640Sdim */ 116214640Sdim if (tmpdvp->id_alive) { 117214640Sdim /* 118214640Sdim * Check for I/O address conflict. We can only check the 119214640Sdim * starting address of the device against the range of the 120214640Sdim * device that has already been probed since we do not 121214640Sdim * know how many I/O addresses this device uses. 122214640Sdim */ 123214640Sdim if (tmpdvp->id_alive != -1) { 124214640Sdim if ((dvp->id_iobase >= tmpdvp->id_iobase) && 125214640Sdim (dvp->id_iobase <= 126214640Sdim (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 127214640Sdim conflict(dvp, tmpdvp, dvp->id_iobase, 128214640Sdim "I/O address", "0x%x"); 129214640Sdim status = 1; 130214640Sdim } 131214640Sdim } 132214640Sdim /* 133214640Sdim * Check for Memory address conflict. We can check for 134214640Sdim * range overlap, but it will not catch all cases since the 135214640Sdim * driver may adjust the msize paramater during probe, for 136214640Sdim * now we just check that the starting address does not 137214640Sdim * fall within any allocated region. 138214640Sdim * XXX could add a second check after the probe for overlap, 139214640Sdim * since at that time we would know the full range. 140214640Sdim * XXX KERNBASE is a hack, we should have vaddr in the table! 141214640Sdim */ 142214640Sdim if(tmpdvp->id_maddr) { 143214640Sdim if((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 144214640Sdim (KERNBASE + dvp->id_maddr <= 145214640Sdim (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 146214640Sdim conflict(dvp, tmpdvp, dvp->id_maddr, "maddr", 147214640Sdim "0x%x"); 148214640Sdim status = 1; 149214640Sdim } 150214640Sdim } 151214640Sdim#ifndef COM_MULTIPORT 152214640Sdim /* 153214640Sdim * Check for IRQ conflicts. 154214640Sdim */ 155214640Sdim if(tmpdvp->id_irq) { 156214640Sdim if (tmpdvp->id_irq == dvp->id_irq) { 157214640Sdim conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 158214640Sdim "irq", "%d"); 159214640Sdim status = 1; 160214640Sdim } 161214640Sdim } 162214640Sdim#endif 163214640Sdim /* 164214640Sdim * Check for DRQ conflicts. 165214640Sdim */ 166214640Sdim if(tmpdvp->id_drq != -1) { 167214640Sdim if (tmpdvp->id_drq == dvp->id_drq) { 168214640Sdim conflict(dvp, tmpdvp, dvp->id_drq, 169214640Sdim "drq", "%d"); 170214640Sdim status = 1; 171214640Sdim } 172214640Sdim } 173214640Sdim } 174214640Sdim return (status); 175214640Sdim} 176214640Sdim 177214640Sdim/* 178214640Sdim * Search through all the isa_devtab_* tables looking for anything that 179214640Sdim * conflicts with the current device. 180214640Sdim */ 181214640Sdimint 182214640Sdimhaveseen_isadev(dvp) 183214640Sdim struct isa_device *dvp; 184214640Sdim{ 185214640Sdim struct isa_device *tmpdvp; 186214640Sdim int status = 0; 187214640Sdim 188214640Sdim for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 189214640Sdim status |= haveseen(dvp, tmpdvp); 190214640Sdim } 191214640Sdim for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 192214640Sdim status |= haveseen(dvp, tmpdvp); 193214640Sdim } 194214640Sdim for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 195214640Sdim status |= haveseen(dvp, tmpdvp); 196214640Sdim } 197214640Sdim for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 198214640Sdim status |= haveseen(dvp, tmpdvp); 199214640Sdim } 200214640Sdim return(status); 201214640Sdim} 202214640Sdim 203214640Sdim/* 204214640Sdim * Configure all ISA devices 205214640Sdim */ 206214640Sdimvoid 207214640Sdimisa_configure() { 208214640Sdim struct isa_device *dvp; 209214640Sdim 210214640Sdim enable_intr(); 211214640Sdim splhigh(); 212214640Sdim INTREN(IRQ_SLAVE); 213214640Sdim printf("Probing for devices on the ISA bus:\n"); 214214640Sdim for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) { 215214640Sdim if (!haveseen_isadev(dvp)) 216214640Sdim config_isadev(dvp,&tty_imask); 217214640Sdim } 218214640Sdim for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) { 219214640Sdim if (!haveseen_isadev(dvp)) 220214640Sdim config_isadev(dvp,&bio_imask); 221214640Sdim } 222214640Sdim for (dvp = isa_devtab_net; dvp->id_driver; dvp++) { 223214640Sdim if (!haveseen_isadev(dvp)) 224214640Sdim config_isadev(dvp,&net_imask); 225214640Sdim } 226214640Sdim for (dvp = isa_devtab_null; dvp->id_driver; dvp++) { 227214640Sdim if (!haveseen_isadev(dvp)) 228214640Sdim config_isadev(dvp,(u_int *) NULL); 229214640Sdim } 230214640Sdim bio_imask |= SWI_CLOCK_MASK; 231214640Sdim net_imask |= SWI_NET_MASK; 232214640Sdim tty_imask |= SWI_TTY_MASK; 233214640Sdim 234214640Sdim/* 235214640Sdim * XXX we should really add the tty device to net_imask when the line is 236214640Sdim * switched to SLIPDISC, and then remove it when it is switched away from 237214640Sdim * SLIPDISC. No need to block out ALL ttys during a splimp when only one 238214640Sdim * of them is running slip. 239214640Sdim * 240214640Sdim * XXX actually, blocking all ttys during a splimp doesn't matter so much 241214640Sdim * with sio because the serial interrupt layer doesn't use tty_imask. Only 242214640Sdim * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 243214640Sdim * during spltty. 244214640Sdim */ 245214640Sdim#include "sl.h" 246214640Sdim#if NSL > 0 247214640Sdim net_imask |= tty_imask; 248214640Sdim tty_imask = net_imask; 249214640Sdim#endif 250214640Sdim /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 251214640Sdim#ifdef DIAGNOSTIC 252214640Sdim printf("bio_imask %x tty_imask %x net_imask %x\n", 253214640Sdim bio_imask, tty_imask, net_imask); 254214640Sdim#endif 255214640Sdim splnone(); 256214640Sdim} 257214640Sdim 258214640Sdim/* 259214640Sdim * Configure an ISA device. 260214640Sdim */ 261214640Sdimvoid 262214640Sdimconfig_isadev(isdp, mp) 263214640Sdim struct isa_device *isdp; 264214640Sdim u_int *mp; 265214640Sdim{ 266214640Sdim struct isa_driver *dp = isdp->id_driver; 267214640Sdim 268214640Sdim if (isdp->id_maddr) { 269214640Sdim extern u_int atdevbase; 270214640Sdim 271214640Sdim isdp->id_maddr -= 0xa0000; /* XXX should be a define */ 272214640Sdim isdp->id_maddr += atdevbase; 273214640Sdim } 274214640Sdim isdp->id_alive = (*dp->probe)(isdp); 275214640Sdim if (isdp->id_alive) { 276214640Sdim /* 277214640Sdim * Only print the I/O address range if id_alive != -1 278214640Sdim * Right now this is a temporary fix just for the new 279214640Sdim * NPX code so that if it finds a 486 that can use trap 280214640Sdim * 16 it will not report I/O addresses. 281214640Sdim * Rod Grimes 04/26/94 282214640Sdim */ 283214640Sdim printf("%s%d", dp->name, isdp->id_unit); 284214640Sdim if (isdp->id_alive != -1) { 285214640Sdim printf(" at 0x%x", isdp->id_iobase); 286214640Sdim if ((isdp->id_iobase + isdp->id_alive - 1) != 287214640Sdim isdp->id_iobase) { 288214640Sdim printf("-0x%x", 289214640Sdim isdp->id_iobase + 290214640Sdim isdp->id_alive - 1); 291214640Sdim } 292214640Sdim } 293214640Sdim if(isdp->id_irq) 294214640Sdim printf(" irq %d", ffs(isdp->id_irq) - 1); 295214640Sdim if (isdp->id_drq != -1) 296214640Sdim printf(" drq %d", isdp->id_drq); 297214640Sdim if (isdp->id_maddr) 298214640Sdim printf(" maddr 0x%x", kvtop(isdp->id_maddr)); 299214640Sdim if (isdp->id_msize) 300214640Sdim printf(" msize %d", isdp->id_msize); 301214640Sdim if (isdp->id_flags) 302214640Sdim printf(" flags 0x%x", isdp->id_flags); 303214640Sdim if (isdp->id_iobase) { 304214640Sdim if (isdp->id_iobase < 0x100) { 305214640Sdim printf(" on motherboard\n"); 306214640Sdim } else { 307214640Sdim if (isdp->id_iobase >= 0x1000) { 308214640Sdim printf (" on eisa\n"); 309214640Sdim } else { 310214640Sdim printf (" on isa\n"); 311214640Sdim } 312214640Sdim } 313214640Sdim } 314214640Sdim 315214640Sdim (*dp->attach)(isdp); 316214640Sdim 317214640Sdim if(isdp->id_irq) { 318214640Sdim int intrno; 319214640Sdim 320214640Sdim intrno = ffs(isdp->id_irq)-1; 321214640Sdim setidt(ICU_OFFSET+intrno, isdp->id_intr, 322214640Sdim SDT_SYS386IGT, SEL_KPL); 323214640Sdim if(mp) { 324214640Sdim INTRMASK(*mp,isdp->id_irq); 325214640Sdim } 326214640Sdim INTREN(isdp->id_irq); 327214640Sdim } 328214640Sdim } else { 329214640Sdim printf("%s%d not found", dp->name, isdp->id_unit); 330214640Sdim if (isdp->id_iobase) { 331214640Sdim printf(" at 0x%x", isdp->id_iobase); 332214640Sdim } 333214640Sdim printf("\n"); 334214640Sdim } 335214640Sdim} 336214640Sdim 337214640Sdim#define IDTVEC(name) __CONCAT(X,name) 338214640Sdim/* default interrupt vector table entries */ 339214640Sdimtypedef void inthand_t(); 340214640Sdimtypedef void (*inthand_func_t)(); 341214640Sdimextern inthand_t 342214640Sdim IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3), 343214640Sdim IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7), 344214640Sdim IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11), 345214640Sdim IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15); 346214640Sdim 347214640Sdimstatic inthand_func_t defvec[ICU_LEN] = { 348214640Sdim &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 349214640Sdim &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 350214640Sdim &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 351214640Sdim &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) }; 352214640Sdim 353214640Sdim/* 354214640Sdim * Fill in default interrupt table (in case of spuruious interrupt 355214640Sdim * during configuration of kernel, setup interrupt control unit 356214640Sdim */ 357214640Sdimvoid 358214640Sdimisa_defaultirq() 359214640Sdim{ 360214640Sdim int i; 361214640Sdim 362214640Sdim /* icu vectors */ 363214640Sdim for (i = 0; i < ICU_LEN; i++) 364214640Sdim setidt(ICU_OFFSET + i, defvec[i], SDT_SYS386IGT, SEL_KPL); 365214640Sdim 366214640Sdim /* initialize 8259's */ 367214640Sdim outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 368214640Sdim outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 369214640Sdim outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 370214640Sdim#ifdef AUTO_EOI_1 371214640Sdim outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 372214640Sdim#else 373214640Sdim outb(IO_ICU1+1, 1); /* 8086 mode */ 374214640Sdim#endif 375214640Sdim outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 376214640Sdim outb(IO_ICU1, 0x0a); /* default to IRR on read */ 377214640Sdim outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 378214640Sdim 379214640Sdim outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 380214640Sdim outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 381214640Sdim outb(IO_ICU2+1,2); /* my slave id is 2 */ 382214640Sdim#ifdef AUTO_EOI_2 383214640Sdim outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 384214640Sdim#else 385214640Sdim outb(IO_ICU2+1,1); /* 8086 mode */ 386214640Sdim#endif 387214640Sdim outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 388214640Sdim outb(IO_ICU2, 0x0a); /* default to IRR on read */ 389214640Sdim} 390214640Sdim 391214640Sdim/* region of physical memory known to be contiguous */ 392214640Sdimvm_offset_t isaphysmem; 393214640Sdimstatic caddr_t dma_bounce[8]; /* XXX */ 394214640Sdimstatic char bounced[8]; /* XXX */ 395214640Sdim#define MAXDMASZ 512 /* XXX */ 396214640Sdim 397214640Sdim/* high byte of address is stored in this port for i-th dma channel */ 398214640Sdimstatic short dmapageport[8] = 399214640Sdim { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 400214640Sdim 401214640Sdim/* 402214640Sdim * isa_dmacascade(): program 8237 DMA controller channel to accept 403214640Sdim * external dma control by a board. 404214640Sdim */ 405214640Sdimvoid isa_dmacascade(unsigned chan) 406214640Sdim{ 407214640Sdim if (chan > 7) 408214640Sdim panic("isa_dmacascade: impossible request"); 409214640Sdim 410214640Sdim /* set dma channel mode, and set dma channel mode */ 411214640Sdim if ((chan & 4) == 0) { 412214640Sdim outb(DMA1_MODE, DMA37MD_CASCADE | chan); 413214640Sdim outb(DMA1_SMSK, chan); 414214640Sdim } else { 415214640Sdim outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 416214640Sdim outb(DMA2_SMSK, chan & 3); 417214640Sdim } 418214640Sdim} 419214640Sdim 420214640Sdim/* 421214640Sdim * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 422214640Sdim * problems by using a bounce buffer. 423214640Sdim */ 424214640Sdimvoid isa_dmastart(int flags, caddr_t addr, unsigned nbytes, unsigned chan) 425214640Sdim{ vm_offset_t phys; 426214640Sdim int waport; 427214640Sdim caddr_t newaddr; 428214640Sdim 429214640Sdim if ( chan > 7 430214640Sdim || (chan < 4 && nbytes > (1<<16)) 431214640Sdim || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 432214640Sdim panic("isa_dmastart: impossible request"); 433214640Sdim 434214640Sdim if (isa_dmarangecheck(addr, nbytes, chan)) { 435214640Sdim if (dma_bounce[chan] == 0) 436214640Sdim dma_bounce[chan] = 437214640Sdim /*(caddr_t)malloc(MAXDMASZ, M_TEMP, M_WAITOK);*/ 438214640Sdim (caddr_t) isaphysmem + NBPG*chan; 439214640Sdim bounced[chan] = 1; 440214640Sdim newaddr = dma_bounce[chan]; 441214640Sdim *(int *) newaddr = 0; /* XXX */ 442214640Sdim 443214640Sdim /* copy bounce buffer on write */ 444214640Sdim if (!(flags & B_READ)) 445214640Sdim bcopy(addr, newaddr, nbytes); 446214640Sdim addr = newaddr; 447214640Sdim } 448214640Sdim 449214640Sdim /* translate to physical */ 450214640Sdim phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 451214640Sdim 452214640Sdim if ((chan & 4) == 0) { 453214640Sdim /* 454214640Sdim * Program one of DMA channels 0..3. These are 455214640Sdim * byte mode channels. 456214640Sdim */ 457214640Sdim /* set dma channel mode, and reset address ff */ 458214640Sdim if (flags & B_READ) 459214640Sdim outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 460214640Sdim else 461214640Sdim outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 462214640Sdim outb(DMA1_FFC, 0); 463214640Sdim 464214640Sdim /* send start address */ 465214640Sdim waport = DMA1_CHN(chan); 466214640Sdim outb(waport, phys); 467214640Sdim outb(waport, phys>>8); 468214640Sdim outb(dmapageport[chan], phys>>16); 469214640Sdim 470214640Sdim /* send count */ 471214640Sdim outb(waport + 1, --nbytes); 472214640Sdim outb(waport + 1, nbytes>>8); 473214640Sdim 474214640Sdim /* unmask channel */ 475214640Sdim outb(DMA1_SMSK, chan); 476214640Sdim } else { 477214640Sdim /* 478214640Sdim * Program one of DMA channels 4..7. These are 479214640Sdim * word mode channels. 480214640Sdim */ 481214640Sdim /* set dma channel mode, and reset address ff */ 482214640Sdim if (flags & B_READ) 483214640Sdim outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 484214640Sdim else 485214640Sdim outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 486214640Sdim outb(DMA2_FFC, 0); 487214640Sdim 488214640Sdim /* send start address */ 489214640Sdim waport = DMA2_CHN(chan - 4); 490214640Sdim outb(waport, phys>>1); 491214640Sdim outb(waport, phys>>9); 492214640Sdim outb(dmapageport[chan], phys>>16); 493214640Sdim 494214640Sdim /* send count */ 495214640Sdim nbytes >>= 1; 496214640Sdim outb(waport + 2, --nbytes); 497214640Sdim outb(waport + 2, nbytes>>8); 498214640Sdim 499214640Sdim /* unmask channel */ 500214640Sdim outb(DMA2_SMSK, chan & 3); 501214640Sdim } 502214640Sdim} 503214640Sdim 504214640Sdimvoid isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 505214640Sdim{ 506214640Sdim 507214640Sdim /* copy bounce buffer on read */ 508214640Sdim /*if ((flags & (B_PHYS|B_READ)) == (B_PHYS|B_READ))*/ 509214640Sdim if (bounced[chan]) { 510214640Sdim bcopy(dma_bounce[chan], addr, nbytes); 511214640Sdim bounced[chan] = 0; 512214640Sdim } 513214640Sdim} 514214640Sdim 515214640Sdim/* 516214640Sdim * Check for problems with the address range of a DMA transfer 517214640Sdim * (non-contiguous physical pages, outside of bus address space, 518214640Sdim * crossing DMA page boundaries). 519214640Sdim * Return true if special handling needed. 520214640Sdim */ 521214640Sdim 522214640Sdimint 523214640Sdimisa_dmarangecheck(caddr_t va, unsigned length, unsigned chan) { 524214640Sdim vm_offset_t phys, priorpage = 0, endva; 525214640Sdim u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 526214640Sdim 527214640Sdim endva = (vm_offset_t)round_page(va + length); 528214640Sdim for (; va < (caddr_t) endva ; va += NBPG) { 529214640Sdim phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 530214640Sdim#define ISARAM_END RAM_END 531214640Sdim if (phys == 0) 532214640Sdim panic("isa_dmacheck: no physical page present"); 533214640Sdim if (phys >= ISARAM_END) 534214640Sdim return (1); 535214640Sdim if (priorpage) { 536214640Sdim if (priorpage + NBPG != phys) 537214640Sdim return (1); 538214640Sdim /* check if crossing a DMA page boundary */ 539214640Sdim if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 540214640Sdim return (1); 541214640Sdim } 542214640Sdim priorpage = phys; 543214640Sdim } 544214640Sdim return (0); 545214640Sdim} 546214640Sdim 547214640Sdim/* head of queue waiting for physmem to become available */ 548214640Sdimstruct buf isa_physmemq; 549214640Sdim 550214640Sdim/* blocked waiting for resource to become free for exclusive use */ 551214640Sdimstatic isaphysmemflag; 552214640Sdim/* if waited for and call requested when free (B_CALL) */ 553214640Sdimstatic void (*isaphysmemunblock)(); /* needs to be a list */ 554214640Sdim 555214640Sdim/* 556214640Sdim * Allocate contiguous physical memory for transfer, returning 557214640Sdim * a *virtual* address to region. May block waiting for resource. 558214640Sdim * (assumed to be called at splbio()) 559214640Sdim */ 560214640Sdimcaddr_t 561214640Sdimisa_allocphysmem(caddr_t va, unsigned length, void (*func)()) { 562214640Sdim 563214640Sdim isaphysmemunblock = func; 564214640Sdim while (isaphysmemflag & B_BUSY) { 565214640Sdim isaphysmemflag |= B_WANTED; 566214640Sdim tsleep((caddr_t)&isaphysmemflag, PRIBIO, "isaphys", 0); 567214640Sdim } 568214640Sdim isaphysmemflag |= B_BUSY; 569214640Sdim 570214640Sdim return((caddr_t)isaphysmem); 571214640Sdim} 572214640Sdim 573214640Sdim/* 574214640Sdim * Free contiguous physical memory used for transfer. 575214640Sdim * (assumed to be called at splbio()) 576214640Sdim */ 577214640Sdimvoid 578214640Sdimisa_freephysmem(caddr_t va, unsigned length) { 579214640Sdim 580214640Sdim isaphysmemflag &= ~B_BUSY; 581214640Sdim if (isaphysmemflag & B_WANTED) { 582214640Sdim isaphysmemflag &= B_WANTED; 583214640Sdim wakeup((caddr_t)&isaphysmemflag); 584214640Sdim if (isaphysmemunblock) 585214640Sdim (*isaphysmemunblock)(); 586214640Sdim } 587214640Sdim} 588214640Sdim 589214640Sdim/* 590214640Sdim * Handle a NMI, possibly a machine check. 591214640Sdim * return true to panic system, false to ignore. 592214640Sdim */ 593214640Sdimint 594214640Sdimisa_nmi(cd) 595214640Sdim int cd; 596214640Sdim{ 597214640Sdim 598214640Sdim log(LOG_CRIT, "\nNMI port 61 %x, port 70 %x\n", inb(0x61), inb(0x70)); 599214640Sdim return(0); 600214640Sdim} 601214640Sdim 602214640Sdim/* 603214640Sdim * Caught a stray interrupt, notify 604214640Sdim */ 605214640Sdimvoid 606214640Sdimisa_strayintr(d) 607214640Sdim int d; 608214640Sdim{ 609214640Sdim 610214640Sdim /* DON'T BOTHER FOR NOW! */ 611214640Sdim /* for some reason, we get bursts of intr #7, even if not enabled! */ 612214640Sdim /* 613214640Sdim * Well the reason you got bursts of intr #7 is because someone 614214640Sdim * raised an interrupt line and dropped it before the 8259 could 615214640Sdim * prioritize it. This is documented in the intel data book. This 616214640Sdim * means you have BAD hardware! I have changed this so that only 617214640Sdim * the first 5 get logged, then it quits logging them, and puts 618214640Sdim * out a special message. rgrimes 3/25/1993 619214640Sdim */ 620214640Sdim extern u_long intrcnt_stray; 621214640Sdim 622214640Sdim intrcnt_stray++; 623214640Sdim if (intrcnt_stray <= 5) 624214640Sdim log(LOG_ERR,"ISA strayintr %x\n", d); 625214640Sdim if (intrcnt_stray == 5) 626214640Sdim log(LOG_CRIT,"Too many ISA strayintr not logging any more\n"); 627214640Sdim} 628214640Sdim 629214640Sdim/* 630214640Sdim * Wait "n" microseconds. 631214640Sdim * Relies on timer 1 counting down from (TIMER_FREQ / hz) at 632214640Sdim * (1 * TIMER_FREQ) Hz. 633214640Sdim * Note: timer had better have been programmed before this is first used! 634214640Sdim * (The standard programming causes the timer to generate a square wave and 635214640Sdim * the counter is decremented twice every cycle.) 636214640Sdim */ 637214640Sdim#define CF (1 * TIMER_FREQ) 638214640Sdim#define TIMER_FREQ 1193182 /* XXX - should be elsewhere */ 639214640Sdim 640214640Sdimvoid 641214640SdimDELAY(n) 642214640Sdim int n; 643214640Sdim{ 644214640Sdim int counter_limit; 645214640Sdim int prev_tick; 646214640Sdim int tick; 647214640Sdim int ticks_left; 648214640Sdim int sec; 649214640Sdim int usec; 650214640Sdim 651214640Sdim#ifdef DELAYDEBUG 652214640Sdim int getit_calls = 1; 653214640Sdim int n1; 654214640Sdim static int state = 0; 655214640Sdim 656214640Sdim if (state == 0) { 657214640Sdim state = 1; 658214640Sdim for (n1 = 1; n1 <= 10000000; n1 *= 10) 659214640Sdim DELAY(n1); 660214640Sdim state = 2; 661214640Sdim } 662214640Sdim if (state == 1) 663214640Sdim printf("DELAY(%d)...", n); 664214640Sdim#endif 665214640Sdim 666214640Sdim /* 667214640Sdim * Read the counter first, so that the rest of the setup overhead is 668214640Sdim * counted. Guess the initial overhead is 20 usec (on most systems it 669214640Sdim * takes about 1.5 usec for each of the i/o's in getit(). The loop 670214640Sdim * takes about 6 usec on a 486/33 and 13 usec on a 386/20. The 671214640Sdim * multiplications and divisions to scale the count take a while). 672214640Sdim */ 673214640Sdim prev_tick = getit(0, 0); 674214640Sdim n -= 20; 675214640Sdim 676214640Sdim /* 677214640Sdim * Calculate (n * (CF / 1e6)) without using floating point and without 678214640Sdim * any avoidable overflows. 679214640Sdim */ 680214640Sdim sec = n / 1000000; 681214640Sdim usec = n - sec * 1000000; 682214640Sdim ticks_left = sec * CF 683214640Sdim + usec * (CF / 1000000) 684214640Sdim + usec * ((CF % 1000000) / 1000) / 1000 685214640Sdim + usec * (CF % 1000) / 1000000; 686214640Sdim 687214640Sdim counter_limit = TIMER_FREQ / hz; 688214640Sdim while (ticks_left > 0) { 689214640Sdim tick = getit(0, 0); 690214640Sdim#ifdef DELAYDEBUG 691214640Sdim ++getit_calls; 692214640Sdim#endif 693214640Sdim if (tick > prev_tick) 694214640Sdim ticks_left -= prev_tick - (tick - counter_limit); 695214640Sdim else 696214640Sdim ticks_left -= prev_tick - tick; 697214640Sdim prev_tick = tick; 698214640Sdim } 699214640Sdim#ifdef DELAYDEBUG 700214640Sdim if (state == 1) 701214640Sdim printf(" %d calls to getit() at %d usec each\n", 702214640Sdim getit_calls, (n + 5) / getit_calls); 703214640Sdim#endif 704214640Sdim} 705214640Sdim 706214640Sdimint 707214640Sdimgetit(unit, timer) 708214640Sdim int unit; 709214640Sdim int timer; 710214640Sdim{ 711214640Sdim int high; 712214640Sdim int low; 713214640Sdim 714214640Sdim /* 715214640Sdim * XXX - isa.h defines bogus timers. There's no such timer as 716214640Sdim * IO_TIMER_2 = 0x48. There's a timer in the CMOS RAM chip but 717214640Sdim * its interface is quite different. Neither timer is an 8252. 718214640Sdim * We actually only call this with unit = 0 and timer = 0. It 719214640Sdim * could be static... 720214640Sdim */ 721214640Sdim /* 722214640Sdim * Protect ourself against interrupts. 723214640Sdim * XXX - sysbeep() and sysbeepstop() need protection. 724214640Sdim */ 725214640Sdim disable_intr(); 726214640Sdim /* 727214640Sdim * Latch the count for 'timer' (cc00xxxx, c = counter, x = any). 728214640Sdim */ 729214640Sdim outb(IO_TIMER1 + 3, timer << 6); 730214640Sdim 731214640Sdim low = inb(IO_TIMER1 + timer); 732214640Sdim high = inb(IO_TIMER1 + timer); 733214640Sdim enable_intr(); 734214640Sdim return ((high << 8) | low); 735214640Sdim} 736214640Sdim 737214640Sdimstatic int beeping; 738214640Sdim 739214640Sdimstatic void 740214640Sdimsysbeepstop(f, dummy) 741214640Sdim caddr_t f; 742214640Sdim int dummy; 743214640Sdim{ 744214640Sdim /* disable counter 2 */ 745214640Sdim outb(0x61, inb(0x61) & 0xFC); 746214640Sdim if (f) 747214640Sdim timeout(sysbeepstop, (caddr_t)0, (int)f); 748214640Sdim else 749214640Sdim beeping = 0; 750214640Sdim} 751214640Sdim 752214640Sdimvoid 753214640Sdimsysbeep(int pitch, int period) 754214640Sdim{ 755214640Sdim 756214640Sdim outb(0x61, inb(0x61) | 3); /* enable counter 2 */ 757214640Sdim /* 758214640Sdim * XXX - move timer stuff to clock.c. 759214640Sdim * Program counter 2: 760214640Sdim * ccaammmb, c counter, a = access, m = mode, b = BCD 761214640Sdim * 1011x110, 11 for aa = LSB then MSB, x11 for mmm = square wave. 762214640Sdim */ 763214640Sdim outb(0x43, 0xb6); /* set command for counter 2, 2 byte write */ 764214640Sdim 765214640Sdim outb(0x42, pitch); 766214640Sdim outb(0x42, (pitch>>8)); 767214640Sdim 768214640Sdim if (!beeping) { 769214640Sdim beeping = period; 770214640Sdim timeout(sysbeepstop, (caddr_t)(period/2), period); 771214640Sdim } 772214640Sdim} 773214640Sdim 774214640Sdim/* 775214640Sdim * Pass command to keyboard controller (8042) 776214640Sdim */ 777214640Sdimunsigned 778214640Sdimkbc_8042cmd(val) 779214640Sdim int val; 780214640Sdim{ 781214640Sdim 782214640Sdim while (inb(KBSTATP)&KBS_IBF); 783214640Sdim if (val) outb(KBCMDP, val); 784214640Sdim while (inb(KBSTATP)&KBS_IBF); 785214640Sdim return (inb(KBDATAP)); 786214640Sdim} 787214640Sdim 788214640Sdim/* 789214640Sdim * find an ISA device in a given isa_devtab_* table, given 790214640Sdim * the table to search, the expected id_driver entry, and the unit number. 791214640Sdim * 792214640Sdim * this function is defined in isa_device.h, and this location is debatable; 793214640Sdim * i put it there because it's useless w/o, and directly operates on 794214640Sdim * the other stuff in that file. 795214640Sdim * 796214640Sdim */ 797214640Sdim 798214640Sdimstruct isa_device *find_isadev(table, driverp, unit) 799214640Sdim struct isa_device *table; 800214640Sdim struct isa_driver *driverp; 801214640Sdim int unit; 802214640Sdim{ 803214640Sdim if (driverp == NULL) /* sanity check */ 804214640Sdim return NULL; 805214640Sdim 806214640Sdim while ((table->id_driver != driverp) || (table->id_unit != unit)) { 807214640Sdim if (table->id_driver == 0) 808214640Sdim return NULL; 809214640Sdim 810214640Sdim table++; 811214640Sdim } 812214640Sdim 813214640Sdim return table; 814214640Sdim} 815214640Sdim 816214640Sdim/* 817214640Sdim * Return nonzero if a (masked) irq is pending for a given device. 818214640Sdim */ 819214640Sdimint 820214640Sdimisa_irq_pending(dvp) 821214640Sdim struct isa_device *dvp; 822214640Sdim{ 823214640Sdim unsigned id_irq; 824214640Sdim 825214640Sdim id_irq = (unsigned short) dvp->id_irq; /* XXX silly type in struct */ 826214640Sdim if (id_irq & 0xff) 827214640Sdim return (inb(IO_ICU1) & id_irq); 828214640Sdim return (inb(IO_ICU2) & (id_irq >> 8)); 829214640Sdim} 830214640Sdim