/*- * 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. * * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $ * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.48 2008/08/02 01:14:43 dillon Exp $ */ /* * This file contains an aggregated module marked: * Copyright (c) 1997, Stefan Esser * All rights reserved. * See the notice for details. */ #include "use_isa.h" #include "opt_auto_eoi.h" #include #ifndef SMP #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NISA > 0 #include #endif #include #include #include #include /* XXX should be in suitable include files */ #define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */ #ifdef APIC_IO /* * This is to accommodate "mixed-mode" programming for * motherboards that don't connect the 8254 to the IO APIC. */ #define AUTO_EOI_1 1 #endif static void init_i8259(void); #define NMI_PARITY (1 << 7) #define NMI_IOCHAN (1 << 6) #define ENMI_WATCHDOG (1 << 7) #define ENMI_BUSTIMER (1 << 6) #define ENMI_IOSTATUS (1 << 5) /* * Handle a NMI, possibly a machine check. * return true to panic system, false to ignore. */ int isa_nmi(int cd) { int retval = 0; int isa_port = inb(0x61); int eisa_port = inb(0x461); log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port); if (isa_port & NMI_PARITY) { log(LOG_CRIT, "RAM parity error, likely hardware failure."); retval = 1; } if (isa_port & NMI_IOCHAN) { log(LOG_CRIT, "I/O channel check, likely hardware failure."); retval = 1; } /* * On a real EISA machine, this will never happen. However it can * happen on ISA machines which implement XT style floating point * error handling (very rare). Save them from a meaningless panic. */ if (eisa_port == 0xff) return(retval); if (eisa_port & ENMI_WATCHDOG) { log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure."); retval = 1; } if (eisa_port & ENMI_BUSTIMER) { log(LOG_CRIT, "EISA bus timeout, likely hardware failure."); retval = 1; } if (eisa_port & ENMI_IOSTATUS) { log(LOG_CRIT, "EISA I/O port status error."); retval = 1; } return(retval); } /* * ICU reinitialize when ICU configuration has lost. */ void icu_reinit(void) { int i; init_i8259(); for (i = 0; i < MAX_HARDINTS; ++i) { if (count_registered_ints(i)) machintr_intren(i); } } /* * Fill in default interrupt table (in case of spurious interrupt * during configuration of kernel, setup interrupt control unit */ void isa_defaultirq(void) { int i; /* icu vectors */ for (i = 0; i < MAX_HARDINTS; i++) machintr_vector_setdefault(i); init_i8259(); } static void init_i8259(void) { /* initialize 8259's */ outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ outb(IO_ICU1+ICU_IMR_OFFSET, IDT_OFFSET); /* starting at this vector index */ outb(IO_ICU1+ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE); /* slave on line 2 */ #ifdef AUTO_EOI_1 outb(IO_ICU1+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */ #else outb(IO_ICU1+ICU_IMR_OFFSET, 1); /* 8086 mode */ #endif outb(IO_ICU1+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */ outb(IO_ICU1, 0x0a); /* default to IRR on read */ outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ outb(IO_ICU2+ICU_IMR_OFFSET, IDT_OFFSET+8); /* staring at this vector index */ outb(IO_ICU2+ICU_IMR_OFFSET, ICU_IRQ_SLAVE); #ifdef AUTO_EOI_2 outb(IO_ICU2+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */ #else outb(IO_ICU2+ICU_IMR_OFFSET,1); /* 8086 mode */ #endif outb(IO_ICU2+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */ outb(IO_ICU2, 0x0a); /* default to IRR on read */ } #if NISA > 0 /* * Return a bitmap of the current interrupt requests. This is 8259-specific * and is only suitable for use at probe time. */ intrmask_t isa_irq_pending(void) { u_char irr1; u_char irr2; irr1 = inb(IO_ICU1); irr2 = inb(IO_ICU2); return ((irr2 << 8) | irr1); } #endif /* The following notice applies beyond this point in the file */ /* * Copyright (c) 1997, Stefan Esser * All rights reserved. * * 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 unmodified, 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $ * */ #ifdef SMP /* * forward_fast_remote() * * This function is called from the receiving end of an IPIQ when a * remote cpu wishes to forward a fast interrupt to us. All we have to * do is set the interrupt pending and let the IPI's doreti deal with it. */ void forward_fastint_remote(void *arg) { int irq = (int)arg; struct mdglobaldata *gd = mdcpu; atomic_set_int_nonlocked(&gd->gd_fpending, 1 << irq); atomic_set_int_nonlocked(&gd->mi.gd_reqflags, RQF_INTPEND); } #endif