550ffff41b
Enforce -Wmissing-prototypes -Wstrict-prototypes for all ppc ports. Split out macppc cpu support and make common to mpc6xx ports. Make other mpc6xx ports use it. Add evcnts for mpc6xx traps.
273 lines
7.5 KiB
C
273 lines
7.5 KiB
C
/* $NetBSD: isa_machdep.c,v 1.6 2001/08/26 02:47:34 matt Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)isa.c 7.2 (Berkeley) 5/13/91
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <machine/pio.h>
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#include <machine/intr.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#define IO_ELCR1 0x4d0
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#define IO_ELCR2 0x4d1
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const struct evcnt *
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isa_intr_evcnt(isa_chipset_tag_t ic, int irq)
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{
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/* XXX for now, no evcnt parent reported */
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return NULL;
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}
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/*
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* Set up an interrupt handler to start being called.
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* XXX PRONE TO RACE CONDITIONS, UGLY, 'INTERESTING' INSERTION ALGORITHM.
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*/
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void *
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isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
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isa_chipset_tag_t ic;
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int irq;
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int type;
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int level;
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int (*ih_fun) __P((void *));
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void *ih_arg;
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{
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return (void *)intr_establish(irq, type, level, ih_fun, ih_arg);
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}
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/*
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* Deregister an interrupt handler.
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*/
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void
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isa_intr_disestablish(ic, arg)
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isa_chipset_tag_t ic;
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void *arg;
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{
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intr_disestablish(arg);
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}
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void
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isa_attach_hook(parent, self, iba)
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struct device *parent, *self;
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struct isabus_attach_args *iba;
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{
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/* Nothing to do. */
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}
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int
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isa_intr(void)
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{
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int irq;
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isa_outb(IO_ICU1, 0x0c);
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irq = isa_inb(IO_ICU1) & 0x07;
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if (irq == IRQ_SLAVE) {
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isa_outb(IO_ICU2, 0x0c);
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irq = (isa_inb(IO_ICU2) & 0x07) + 8;
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}
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return (irq);
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}
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void
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isa_intr_mask(mask)
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int mask;
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{
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isa_outb(IO_ICU1+1, mask);
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isa_outb(IO_ICU2+1, mask >> 8);
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}
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void
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isa_intr_clr(irq)
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int irq;
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{
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if (irq < 8) {
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isa_outb(IO_ICU1, 0xe0 | irq);
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} else {
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isa_outb(IO_ICU2, 0xe0 | (irq & 7));
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isa_outb(IO_ICU1, 0xe0 | IRQ_SLAVE);
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}
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}
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/*
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* Initialize the Interrupt controller logic.
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*/
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void
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init_icu(int lvlmask)
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{
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int i;
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extern int intrtype[];
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for (i= 0; i < ICU_LEN; i++) {
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switch (i) {
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case 0:
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case 2:
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case 8:
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intrtype[i] = IST_EDGE;
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break;
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default:
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intrtype[i] = (1 << i) & lvlmask ? IST_LEVEL : IST_NONE;
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}
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}
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#ifdef DEBUG
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printf("old elcr = 0x%02x%02x, new = 0x%04x\n",
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isa_inb(IO_ELCR2), isa_inb(IO_ELCR1), lvlmask);
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#endif
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isa_outb(IO_ELCR1, (lvlmask >> 0) & 0xff);
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isa_outb(IO_ELCR2, (lvlmask >> 8) & 0xff);
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isa_outb(IO_ICU1, 0x11); /* program device, four bytes */
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isa_outb(IO_ICU1+1, 0); /* starting at this vector */
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isa_outb(IO_ICU1+1, 1 << IRQ_SLAVE); /* slave on line 2 */
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isa_outb(IO_ICU1+1, 1); /* 8086 mode */
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isa_outb(IO_ICU1+1, 0xff); /* leave interrupts masked */
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isa_outb(IO_ICU2, 0x11); /* program device, four bytes */
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isa_outb(IO_ICU2+1, 8); /* starting at this vector */
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isa_outb(IO_ICU2+1, IRQ_SLAVE);
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isa_outb(IO_ICU2+1, 1); /* 8086 mode */
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isa_outb(IO_ICU2+1, 0xff); /* leave interrupts masked */
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}
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void
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isa_setirqstat(irq, enabled, type)
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int irq, enabled, type;
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{
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u_int8_t elcr[2];
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int icu, bit;
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icu = irq / 8;
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bit = irq % 8;
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elcr[0] = isa_inb(IO_ELCR1);
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elcr[1] = isa_inb(IO_ELCR2);
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if (type == IST_LEVEL)
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elcr[icu] |= 1 << bit;
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else
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elcr[icu] &= ~(1 << bit);
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isa_outb(IO_ELCR1, elcr[0]);
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isa_outb(IO_ELCR2, elcr[1]);
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}
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int
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isa_intr_alloc(isa_chipset_tag_t c, int mask, int type, int *irq_p)
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{
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int irq;
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int maybe_irq = -1;
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int shared_depth = 0;
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mask &= 0x8b28; /* choose from 3, 5, 8, 9, 11, 15 XXX */
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for (irq = 0; mask != 0; mask >>= 1, irq++) {
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if ((mask & 1) == 0)
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continue;
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if (intrtype[irq] == IST_NONE) {
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*irq_p = irq;
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return 0;
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}
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/* Level interrupts can be shared */
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if (type == IST_LEVEL && intrtype[irq] == IST_LEVEL) {
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struct intrhand *ih = intrhand[irq];
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int depth;
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if (maybe_irq == -1) {
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maybe_irq = irq;
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continue;
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}
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for (depth = 0; ih != NULL; ih = ih->ih_next)
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depth++;
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if (depth < shared_depth) {
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maybe_irq = irq;
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shared_depth = depth;
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}
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}
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}
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if (maybe_irq != -1) {
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*irq_p = maybe_irq;
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return 0;
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}
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return 1;
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}
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