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