/* $NetBSD: i8259.c,v 1.25 2020/04/25 15:26:18 bouyer Exp $ */ /* * Copyright 2002 (c) Wasabi Systems, Inc. * All rights reserved. * * Written by Frank van der Linden for Wasabi Systems, Inc. * * 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 for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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. */ /*- * 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. 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 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: i8259.c,v 1.25 2020/04/25 15:26:18 bouyer Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/syslog.h> #include <sys/device.h> #include <sys/proc.h> #include <dev/isa/isareg.h> #include <dev/ic/i8259reg.h> #include <machine/pio.h> #include <machine/cpufunc.h> #include <machine/cpu.h> #include <machine/pic.h> #include <machine/i8259.h> #ifndef __x86_64__ #include "mca.h" #if NMCA > 0 #include <machine/mca_machdep.h> /* for MCA_system */ #endif #endif static void i8259_hwmask(struct pic *, int); static void i8259_hwunmask(struct pic *, int); static void i8259_setup(struct pic *, struct cpu_info *, int, int, int); static void i8259_reinit_irqs(void); unsigned i8259_imen; /* * Perhaps this should be made into a real device. */ struct pic i8259_pic = { .pic_name = "pic0", .pic_type = PIC_I8259, .pic_vecbase = 0, .pic_apicid = 0, .pic_lock = __SIMPLELOCK_UNLOCKED, .pic_hwmask = i8259_hwmask, .pic_hwunmask = i8259_hwunmask, .pic_addroute = i8259_setup, .pic_delroute = i8259_setup, .pic_level_stubs = legacy_stubs, .pic_edge_stubs = legacy_stubs, .pic_intr_get_devname = x86_intr_get_devname, .pic_intr_get_assigned = x86_intr_get_assigned, .pic_intr_get_count = x86_intr_get_count, }; void i8259_default_setup(void) { #if NMCA > 0 /* level-triggered interrupts on MCA PS/2s */ if (MCA_system) /* reset; program device, level-triggered, four bytes */ outb(IO_ICU1 + PIC_ICW1, ICW1_SELECT | ICW1_LTIM | ICW1_IC4); else #endif /* reset; program device, four bytes */ outb(IO_ICU1 + PIC_ICW1, ICW1_SELECT | ICW1_IC4); /* starting at this vector index */ outb(IO_ICU1 + PIC_ICW2, ICU_OFFSET); /* slave on line 2 */ outb(IO_ICU1 + PIC_ICW3, ICW3_CASCADE(IRQ_SLAVE)); #ifdef AUTO_EOI_1 /* auto EOI, 8086 mode */ outb(IO_ICU1 + PIC_ICW4, ICW4_AEOI | ICW4_8086); #else /* 8086 mode */ outb(IO_ICU1 + PIC_ICW4, ICW4_8086); #endif /* leave interrupts masked */ outb(IO_ICU1 + PIC_OCW1, 0xff); /* special mask mode (if available) */ outb(IO_ICU1 + PIC_OCW3, OCW3_SELECT | OCW3_SSMM | OCW3_SMM); /* Read IRR by default. */ outb(IO_ICU1 + PIC_OCW3, OCW3_SELECT | OCW3_RR); #ifdef REORDER_IRQ /* pri order 3-7, 0-2 (com2 first) */ outb(IO_ICU1 + PIC_OCW2, OCW2_SELECT | OCW2_R | OCW2_SL | OCW2_ILS(3 - 1)); #endif #if NMCA > 0 /* level-triggered interrupts on MCA PS/2s */ if (MCA_system) /* reset; program device, level-triggered, four bytes */ outb(IO_ICU2 + PIC_ICW1, ICW1_SELECT | ICW1_LTIM | ICW1_IC4); else #endif /* reset; program device, four bytes */ outb(IO_ICU2 + PIC_ICW1, ICW1_SELECT | ICW1_IC4); /* staring at this vector index */ outb(IO_ICU2 + PIC_ICW2, ICU_OFFSET + 8); /* slave connected to line 2 of master */ outb(IO_ICU2 + PIC_ICW3, ICW3_SIC(IRQ_SLAVE)); #ifdef AUTO_EOI_2 /* auto EOI, 8086 mode */ outb(IO_ICU2 + PIC_ICW4, ICW4_AEOI | ICW4_8086); #else /* 8086 mode */ outb(IO_ICU2 + PIC_ICW4, ICW4_8086); #endif /* leave interrupts masked */ outb(IO_ICU2 + PIC_OCW1, 0xff); /* special mask mode (if available) */ outb(IO_ICU2 + PIC_OCW3, OCW3_SELECT | OCW3_SSMM | OCW3_SMM); /* Read IRR by default. */ outb(IO_ICU2 + PIC_OCW3, OCW3_SELECT | OCW3_RR); } static void i8259_hwmask(struct pic *pic, int pin) { unsigned port; uint8_t byte; i8259_imen |= (1 << pin); #ifdef PIC_MASKDELAY delay(10); #endif if (pin > 7) { port = IO_ICU2 + PIC_OCW1; byte = i8259_imen >> 8; } else { port = IO_ICU1 + PIC_OCW1; byte = i8259_imen & 0xff; } outb(port, byte); } static void i8259_hwunmask(struct pic *pic, int pin) { unsigned port; uint8_t byte; x86_disable_intr(); /* XXX */ i8259_imen &= ~(1 << pin); #ifdef PIC_MASKDELAY delay(10); #endif if (pin > 7) { port = IO_ICU2 + PIC_OCW1; byte = i8259_imen >> 8; } else { port = IO_ICU1 + PIC_OCW1; byte = i8259_imen & 0xff; } outb(port, byte); x86_enable_intr(); } static void i8259_reinit_irqs(void) { int irqs, irq; struct cpu_info *ci = &cpu_info_primary; const size_t array_count = __arraycount(ci->ci_isources); const size_t array_len = MIN(array_count, NUM_LEGACY_IRQS); irqs = 0; for (irq = 0; irq < array_len; irq++) if (ci->ci_isources[irq] != NULL) irqs |= 1 << irq; if (irqs >= 0x100) /* any IRQs >= 8 in use */ irqs |= 1 << IRQ_SLAVE; i8259_imen = ~irqs; outb(IO_ICU1 + PIC_OCW1, i8259_imen); outb(IO_ICU2 + PIC_OCW1, i8259_imen >> 8); } static void i8259_setup(struct pic *pic, struct cpu_info *ci, int pin, int idtvec, int type) { if (CPU_IS_PRIMARY(ci)) i8259_reinit_irqs(); } void i8259_reinit(void) { i8259_default_setup(); i8259_reinit_irqs(); } unsigned i8259_setmask(unsigned mask) { unsigned old = i8259_imen; i8259_imen = mask; outb(IO_ICU1 + PIC_OCW1, i8259_imen); outb(IO_ICU2 + PIC_OCW1, i8259_imen >> 8); return old; }
