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31 lines
746 B
31 lines
746 B
20 years ago
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/*
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* arch/i386/mach-generic/io_ports.h
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*
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* Machine specific IO port address definition for generic.
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* Written by Osamu Tomita <tomita@cinet.co.jp>
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*/
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#ifndef _MACH_IO_PORTS_H
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#define _MACH_IO_PORTS_H
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/* i8253A PIT registers */
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#define PIT_MODE 0x43
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#define PIT_CH0 0x40
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#define PIT_CH2 0x42
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/* i8259A PIC registers */
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#define PIC_MASTER_CMD 0x20
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#define PIC_MASTER_IMR 0x21
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#define PIC_MASTER_ISR PIC_MASTER_CMD
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#define PIC_MASTER_POLL PIC_MASTER_ISR
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#define PIC_MASTER_OCW3 PIC_MASTER_ISR
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#define PIC_SLAVE_CMD 0xa0
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#define PIC_SLAVE_IMR 0xa1
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/* i8259A PIC related value */
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#define PIC_CASCADE_IR 2
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#define MASTER_ICW4_DEFAULT 0x01
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#define SLAVE_ICW4_DEFAULT 0x01
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#define PIC_ICW4_AEOI 2
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#endif /* !_MACH_IO_PORTS_H */
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