77 lines
2.6 KiB
C
77 lines
2.6 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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* 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 _X86_ISA_ICU_H_
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#define _X86_ISA_ICU_H_
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#define ICU_IMR_OFFSET 1
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/*
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* PC-AT machines wire the slave PIC to pin 2 on the master PIC.
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*/
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#define ICU_SLAVEID 2
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/*
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* Determine the base master and slave modes not including auto EOI support.
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* All machines that FreeBSD supports use 8086 mode.
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*/
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#define BASE_MASTER_MODE ICW4_8086
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#define BASE_SLAVE_MODE ICW4_8086
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/* Enable automatic EOI if requested. */
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#ifdef AUTO_EOI_1
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#define MASTER_MODE (BASE_MASTER_MODE | ICW4_AEOI)
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#else
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#define MASTER_MODE BASE_MASTER_MODE
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#endif
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#ifdef AUTO_EOI_2
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#define SLAVE_MODE (BASE_SLAVE_MODE | ICW4_AEOI)
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#else
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#define SLAVE_MODE BASE_SLAVE_MODE
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#endif
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#define IRQ_MASK(irq) (1 << (irq))
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#define IMEN_MASK(ai) (IRQ_MASK((ai)->at_irq))
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void atpic_handle_intr(u_int vector, struct trapframe *frame);
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void atpic_startup(void);
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#endif /* !_X86_ISA_ICU_H_ */
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