477a642cee
There are various options documented in i386/conf/LINT, there is more to come over the next few days. The kernel should run pretty much "as before" without the options to activate SMP mode. There are a handful of known "loose ends" that need to be fixed, but have been put off since the SMP kernel is in a moderately good condition at the moment. This commit is the result of the tinkering and testing over the last 14 months by many people. A special thanks to Steve Passe for implementing the APIC code!
179 lines
5.0 KiB
C
179 lines
5.0 KiB
C
/*-
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* Copyright (c) 1990 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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* from: @(#)icu.h 5.6 (Berkeley) 5/9/91
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* $Id: icu.h,v 1.10 1997/02/22 09:36:13 peter Exp $
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*/
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/*
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* AT/386 Interrupt Control constants
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* W. Jolitz 8/89
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*/
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#ifndef _I386_ISA_ICU_H_
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#define _I386_ISA_ICU_H_
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#ifndef LOCORE
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#include "opt_smp.h" /* so we dont have to change EVERY file including icu.h */
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/*
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* Interrupt "level" mechanism variables, masks, and macros
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*/
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extern unsigned imen; /* interrupt mask enable */
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#if defined(APIC_IO)
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# if !defined(_MACHINE_SMP_H_)
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/** XXX what a hack, its this or include <machine/smp.h>! */
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void write_io_apic_mask24 __P((int, u_int32_t)); /* i386/i386/mpapic.c */
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# endif /* _MACHINE_SMP_H_ */
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#if defined(MULTIPLE_IOAPICS)
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#error MULTIPLE_IOAPICSXXX: cannot assume apic #0 in the following functions.
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#endif /* MULTIPLE_IOAPICS */
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static __inline u_int32_t
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INTRGET( void )
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{
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return (imen & 0x00ffffff); /* return our global copy */
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}
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static __inline void
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INTRSET( unsigned s )
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{
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write_io_apic_mask24( 0, s );
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imen = s;
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}
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static __inline void
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INTREN( unsigned s )
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{
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write_io_apic_mask24( 0, imen & ~s );
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imen &= ~s;
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}
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static __inline void
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INTRDIS( unsigned s )
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{
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write_io_apic_mask24( 0, imen | s );
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imen |= s;
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}
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#define INTRMASK(msk,s) (msk |= (s))
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#define INTRUNMASK(msk,s) (msk &= ~(s))
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#else /* APIC_IO */
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#define INTREN(s) (imen &= ~(s), SET_ICUS())
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#define INTRDIS(s) (imen |= (s), SET_ICUS())
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#define INTRMASK(msk,s) (msk |= (s))
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#define INTRUNMASK(msk,s) (msk &= ~(s))
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#if 0
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#ifdef PC98
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#define SET_ICUS() (outb(IO_ICU1 + 2, imen), outb(IU_ICU2 + 2, imen >> 8))
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#else /* IBM-PC */
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#define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8))
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#endif /* PC98 */
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#else
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/*
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* XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to
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* include isa.h, while too many things include icu.h.
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*/
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#ifdef PC98
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#define SET_ICUS() (outb(0x02, imen), outb(0x0a, imen >> 8))
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#else
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#define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8))
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#endif
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#endif
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#endif /* APIC_IO */
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#endif /* LOCORE */
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/*
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* Interrupt enable bits - in normal order of priority (which we change)
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*/
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#define IRQ0 0x0001 /* highest priority - timer */
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#define IRQ1 0x0002
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#define IRQ_SLAVE 0x0004
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#define IRQ8 0x0100
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#define IRQ9 0x0200
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#define IRQ2 IRQ9
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#define IRQ10 0x0400
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#define IRQ11 0x0800
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#define IRQ12 0x1000
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#define IRQ13 0x2000
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#define IRQ14 0x4000
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#define IRQ15 0x8000
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#define IRQ3 0x0008 /* this is highest after rotation */
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#define IRQ4 0x0010
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#define IRQ5 0x0020
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#define IRQ6 0x0040
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#define IRQ7 0x0080 /* lowest - parallel printer */
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#ifdef PC98
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#undef IRQ2
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#define IRQ2 0x0004
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#undef IRQ_SLAVE
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#define IRQ_SLAVE 0x0080
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#endif
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/*
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* Interrupt Control offset into Interrupt descriptor table (IDT)
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*/
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#define ICU_OFFSET 32 /* 0-31 are processor exceptions */
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#if defined(APIC_IO)
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#include <machine/apic.h>
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#if defined(IPI_INTS)
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/* 32-47: ISA IRQ0-IRQ15, 48-55: IO APIC IRQ16-IRQ23, 56-59: LOCAL APIC IPI */
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#define ICU_LEN 28
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#else
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/* 32-47: ISA IRQ0-IRQ15, 48-55: IO APIC IRQ16-IRQ23 */
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#define ICU_LEN 24
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#endif /* IPI_INTS */
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#else
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#define ICU_LEN 16 /* 32-47 are ISA interrupts */
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#endif /* APIC_IO */
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#endif /* !_I386_ISA_ICU_H_ */
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