718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
89 lines
3.5 KiB
C
89 lines
3.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003 Peter Wemm
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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/*
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* Register defintions for the i8259A programmable interrupt controller.
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*/
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#ifndef _DEV_IC_I8259_H_
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#define _DEV_IC_I8259_H_
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/* Initialization control word 1. Written to even address. */
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#define ICW1_IC4 0x01 /* ICW4 present */
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#define ICW1_SNGL 0x02 /* 1 = single, 0 = cascaded */
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#define ICW1_ADI 0x04 /* 1 = 4, 0 = 8 byte vectors */
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#define ICW1_LTIM 0x08 /* 1 = level trigger, 0 = edge */
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#define ICW1_RESET 0x10 /* must be 1 */
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/* 0x20 - 0x80 - in 8080/8085 mode only */
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/* Initialization control word 2. Written to the odd address. */
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/* No definitions, it is the base vector of the IDT for 8086 mode */
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/* Initialization control word 3. Written to the odd address. */
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/* For a master PIC, bitfield indicating a slave 8259 on given input */
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/* For slave, lower 3 bits are the slave's ID binary id on master */
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/* Initialization control word 4. Written to the odd address. */
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#define ICW4_8086 0x01 /* 1 = 8086, 0 = 8080 */
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#define ICW4_AEOI 0x02 /* 1 = Auto EOI */
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#define ICW4_MS 0x04 /* 1 = buffered master, 0 = slave */
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#define ICW4_BUF 0x08 /* 1 = enable buffer mode */
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#define ICW4_SFNM 0x10 /* 1 = special fully nested mode */
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/* Operation control words. Written after initialization. */
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/* Operation control word type 1 */
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/*
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* No definitions. Written to the odd address. Bitmask for interrupts.
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* 1 = disabled.
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*/
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/* Operation control word type 2. Bit 3 (0x08) must be zero. Even address. */
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#define OCW2_L0 0x01 /* Level */
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#define OCW2_L1 0x02
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#define OCW2_L2 0x04
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/* 0x08 must be 0 to select OCW2 vs OCW3 */
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/* 0x10 must be 0 to select OCW2 vs ICW1 */
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#define OCW2_EOI 0x20 /* 1 = EOI */
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#define OCW2_SL 0x40 /* EOI mode */
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#define OCW2_R 0x80 /* EOI mode */
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/* Operation control word type 3. Bit 3 (0x08) must be set. Even address. */
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#define OCW3_RIS 0x01 /* 1 = read IS, 0 = read IR */
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#define OCW3_RR 0x02 /* register read */
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#define OCW3_P 0x04 /* poll mode command */
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/* 0x08 must be 1 to select OCW3 vs OCW2 */
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#define OCW3_SEL 0x08 /* must be 1 */
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/* 0x10 must be 0 to select OCW3 vs ICW1 */
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#define OCW3_SMM 0x20 /* special mode mask */
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#define OCW3_ESMM 0x40 /* enable SMM */
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#endif /* !_DEV_IC_I8259_H_ */
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