302480a356
Some interface botches went away, leaving the macros unused outside of the implementation of interrupt masking, and it was silly for the implementation to use the macros in only one place each.
158 lines
4.7 KiB
C
158 lines
4.7 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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* $FreeBSD$
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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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#ifdef APIC_IO
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/*
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#define MP_SAFE
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* Note:
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* Most of the SMP equivilants of the icu macros are coded
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* elsewhere in an MP-safe fashion.
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* In particular note that the 'imen' variable is opaque.
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* DO NOT access imen directly, use INTREN()/INTRDIS().
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*/
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void INTREN __P((u_int));
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void INTRDIS __P((u_int));
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#else /* APIC_IO */
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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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#define INTREN(s) (imen &= ~(s), SET_ICUS())
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#define INTRDIS(s) (imen |= (s), SET_ICUS())
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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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#define INTRGET() ((inb(IO_ICU2) << 8 | inb(IO_ICU1)) & 0xffff)
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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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#define INTRGET() ((inb(IO_ICU2) << 8 | inb(IO_ICU1)) & 0xffff)
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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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/* XXX is this correct? */
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#define INTRGET() ((inb(0x0a) << 8 | inb(0x02)) & 0xffff)
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#else
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#define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8))
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#define INTRGET() ((inb(0xa1) << 8 | inb(0x21)) & 0xffff)
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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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#ifdef APIC_IO
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/*
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* Note: The APIC uses different values for IRQxxx.
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* Unfortunately many drivers use the 8259 values as indexes
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* into tables, etc. The APIC equivilants are kept as APIC_IRQxxx.
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* The 8259 versions have to be used in SMP for legacy operation
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* of the drivers.
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*/
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#endif /* APIC_IO */
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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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#ifdef APIC_IO
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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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#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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