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- /*-
- * 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.
- *
- * @(#)isa.c 7.2 (Berkeley) 5/13/91
- */
-
- /*
- * code to manage AT bus
- */
-
- #include "param.h"
- #include "systm.h"
- #include "conf.h"
- #include "file.h"
- #include "buf.h"
- #include "uio.h"
- #include "syslog.h"
- #include "machine/segments.h"
- #include "i386/isa/isa_device.h"
- #include "i386/isa/icu.h"
-
- /*
- * Configure all ISA devices
- */
- isa_configure() {
- struct isa_device *dvp;
- struct isa_driver *dp;
-
- splhigh();
- INTREN(IRQ_SLAVE);
- for (dvp = isa_devtab_bio; config_isadev(dvp,&biomask); dvp++);
- for (dvp = isa_devtab_tty; config_isadev(dvp,&ttymask); dvp++);
- for (dvp = isa_devtab_net; config_isadev(dvp,&netmask); dvp++);
- for (dvp = isa_devtab_null; config_isadev(dvp,0); dvp++);
- #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;
- int *mp;
- {
- struct isa_driver *dp;
-
- if (dp = isdp->id_driver) {
- if (isdp->id_maddr) {
- extern int atdevbase;
-
- isdp->id_maddr -= 0xa0000;
- isdp->id_maddr += atdevbase;
- }
- isdp->id_alive = (*dp->probe)(isdp);
- if (isdp->id_alive) {
- printf("%s%d", dp->name, isdp->id_unit);
- (*dp->attach)(isdp);
- printf(" at 0x%x ", isdp->id_iobase);
- if(isdp->id_irq) {
- int intrno;
-
- intrno = ffs(isdp->id_irq)-1;
- printf("irq %d ", intrno);
- INTREN(isdp->id_irq);
- if(mp)INTRMASK(*mp,isdp->id_irq);
- setidt(ICU_OFFSET+intrno, isdp->id_intr,
- SDT_SYS386IGT, SEL_KPL);
- }
- if (isdp->id_drq != -1) printf("drq %d ", isdp->id_drq);
- printf("on isa\n");
- }
- return (1);
- } else return(0);
- }
-
- #define IDTVEC(name) __CONCAT(X,name)
- /* default interrupt vector table */
- 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);
-
- /*
- * Fill in default interrupt table (in case of spuruious interrupt
- * during configuration of kernel, setup interrupt control unit
- */
- isa_defaultirq() {
-
- /* first icu */
- setidt(32, &IDTVEC(intr0), SDT_SYS386IGT, SEL_KPL);
- setidt(33, &IDTVEC(intr1), SDT_SYS386IGT, SEL_KPL);
- setidt(34, &IDTVEC(intr2), SDT_SYS386IGT, SEL_KPL);
- setidt(35, &IDTVEC(intr3), SDT_SYS386IGT, SEL_KPL);
- setidt(36, &IDTVEC(intr4), SDT_SYS386IGT, SEL_KPL);
- setidt(37, &IDTVEC(intr5), SDT_SYS386IGT, SEL_KPL);
- setidt(38, &IDTVEC(intr6), SDT_SYS386IGT, SEL_KPL);
- setidt(39, &IDTVEC(intr7), SDT_SYS386IGT, SEL_KPL);
-
- /* second icu */
- setidt(40, &IDTVEC(intr8), SDT_SYS386IGT, SEL_KPL);
- setidt(41, &IDTVEC(intr9), SDT_SYS386IGT, SEL_KPL);
- setidt(42, &IDTVEC(intr10), SDT_SYS386IGT, SEL_KPL);
- setidt(43, &IDTVEC(intr11), SDT_SYS386IGT, SEL_KPL);
- setidt(44, &IDTVEC(intr12), SDT_SYS386IGT, SEL_KPL);
- setidt(45, &IDTVEC(intr13), SDT_SYS386IGT, SEL_KPL);
- setidt(46, &IDTVEC(intr14), SDT_SYS386IGT, SEL_KPL);
- setidt(47, &IDTVEC(intr15), SDT_SYS386IGT, SEL_KPL);
-
- /* initialize 8259's */
- outb(0xf1,0);
- outb(0x20,0x11);
- outb(0x21,32);
- outb(0x21,4);
- outb(0x21,1);
- outb(0x21,0xff);
-
- outb(0xa0,0x11);
- outb(0xa1,40);
- outb(0xa1,2);
- outb(0xa1,1);
- outb(0xa1,0xff);
- }
-
- /* stuff needed for virtual to physical calculations */
-
- struct buf *dma_bounce[8];
- #define MAXDMASZ 512
-
- /* XXX temporary crud */
- kernel_space(x)
- unsigned long x;
- {
- if (x >= KERNBASE) return 1;
- else return 0;
- }
-
-
- /****************************************************************************/
- /* at_dma */
- /* set up DMA read/write operation and virtual address addr for nbytes */
- /****************************************************************************/
- at_dma(read,addr,nbytes, chan)
- int read;
- unsigned long addr;
- int nbytes;
- {
- unsigned long phys;
- int s,raw;
- caddr_t bounce;
-
- if (kernel_space(addr)) raw = 0;
- else raw = 1;
-
- if(raw) {
- if (dma_bounce[chan] == 0)
- dma_bounce[chan] = geteblk(MAXDMASZ);
- bounce = dma_bounce[chan]->b_un.b_addr;
- }
-
- /* copy bounce buffer on write */
- if (raw && !read) bcopy(addr,bounce,nbytes);
-
- /* Set read/write bytes */
- if (read) {
- outb(0xC,0x46); outb(0xB,0x46);
- } else {
- outb(0xC,0x4A); outb(0xB,0x4A);
- }
- /* Send start address */
- if (raw) phys = (unsigned long) bounce;
- else phys = addr;
- /* translate to physical */
- phys = pmap_extract(pmap_kernel(), (vm_offset_t)phys);
- outb(0x4,phys & 0xFF);
- outb(0x4,(phys>>8) & 0xFF);
- outb(0x81,(phys>>16) & 0xFF);
- /* Send count */
- nbytes--;
- outb(0x5,nbytes & 0xFF);
- outb(0x5,(nbytes>>8) & 0xFF);
- /* set channel 2 */
- outb(0x0A,chan);
- }
-
- /*
- * 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) {
-
- /* for some reason, we get bursts of intr #7, even if not enabled! */
- log(LOG_ERR,"ISA strayintr %d", ffs(d)-1);
- }
-