135 lines
2.4 KiB
C
135 lines
2.4 KiB
C
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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8259.h
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Abstract:
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This module contains a variety of constants, function prototypes,
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inline functions and external data declarations used by code to
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access the 8259 PIC.
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Author:
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Forrest Foltz (forrestf) 24-Oct-2000
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--*/
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#ifndef _8259_H_
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#define _8259_H_
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//
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// Initialization control words for the PICs
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//
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#define ICW1_ICW4_NEEDED 0x01
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#define ICW1_CASCADE 0x00
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#define ICW1_INTERVAL8 0x00
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#define ICW1_LEVEL_TRIG 0x08
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#define ICW1_EDGE_TRIG 0x00
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#define ICW1_ICW 0x10
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#define ICW4_8086_MODE 0x01
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#define ICW4_AUTO_EOI 0x02
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#define ICW4_NORM_EOI 0x00
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#define ICW4_NON_BUF_MODE 0x00
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#define ICW4_SPEC_FULLY_NESTED 0x10
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#define ICW4_NOT_SPEC_FULLY_NESTED 0x00
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#define PIC1_EOI_MASK 0x60
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#if defined(NEC_98)
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#define PIC2_EOI 0x67
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#else
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#define PIC2_EOI 0x62
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#endif
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#define OCW2_NON_SPECIFIC_EOI 0x20
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#define OCW2_SPECIFIC_EOI 0x60
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#define OCW3_READ_ISR 0x0B
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#define OCW3_READ_IRR 0x0A
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#define PIC1_BASE 0x30
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#define PIC2_BASE 0x38
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#if defined(PIC1_PORT0)
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C_ASSERT(PIC1_PORT0 == 0x20);
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C_ASSERT(PIC1_PORT1 == 0x21);
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C_ASSERT(PIC2_PORT0 == 0xA0);
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C_ASSERT(PIC2_PORT1 == 0xA1);
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#undef PIC1_PORT0
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#undef PIC1_PORT1
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#undef PIC2_PORT0
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#undef PIC2_PORT1
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#endif
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#define PIC1_PORT0 (PUCHAR)0x20
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#define PIC1_PORT1 (PUCHAR)0x21
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#define PIC2_PORT0 (PUCHAR)0xA0
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#define PIC2_PORT1 (PUCHAR)0xA1
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#if defined(EISA_EDGE_LEVEL0)
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C_ASSERT(EISA_EDGE_LEVEL0 == 0x4D0);
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C_ASSERT(EISA_EDGE_LEVEL1 == 0x4D1);
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#undef EISA_EDGE_LEVEL0
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#undef EISA_EDGE_LEVEL1
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#endif
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#define EISA_EDGE_LEVEL0 (PUCHAR)0x4D0
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#define EISA_EDGE_LEVEL1 (PUCHAR)0x4D1
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__inline
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VOID
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SET_8259_MASK (
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IN USHORT Mask
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)
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{
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WRITE_PORT_USHORT_PAIR (PIC1_PORT1,PIC2_PORT1,Mask);
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IO_DELAY();
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}
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__inline
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USHORT
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GET_8259_MASK (
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VOID
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)
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{
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USHORT mask;
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mask = READ_PORT_USHORT_PAIR (PIC1_PORT1,PIC2_PORT1);
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IO_DELAY();
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return mask;
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}
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__inline
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VOID
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PIC1DELAY(
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VOID
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)
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{
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READ_PORT_UCHAR(PIC1_PORT0);
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IO_DELAY();
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}
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__inline
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VOID
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PIC2DELAY(
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VOID
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)
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{
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READ_PORT_UCHAR(PIC2_PORT0);
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IO_DELAY();
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}
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#endif // _8259_H_
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