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/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
ioaccess.h
Abstract:
This file contains the definitions to read and write IO registers.
Author:
Lluis Abello (lluis) 1-May-91
Environment:
Kernel mode
Revision History:
--*/
#ifndef _IOACCESS
#define _IOACCESS
//
// I/O space read and write macros.
//
#ifdef R4000
#undef READ_REGISTER_UCHAR
#undef READ_REGISTER_USHORT
#undef READ_REGISTER_ULONG
#undef WRITE_REGISTER_UCHAR
#undef WRITE_REGISTER_USHORT
#undef WRITE_REGISTER_ULONG
// #define READ_REGISTER_UCHAR(x) NtReadByte(x)
// #define READ_REGISTER_USHORT(x) NtReadShort(x)
// #define READ_REGISTER_ULONG(x) NtReadLong(x)
// #define WRITE_REGISTER_UCHAR(x, y) NtFlushByteBuffer(x,y)
// #define WRITE_REGISTER_USHORT(x, y) NtFlushShortBuffer(x,y)
// #define WRITE_REGISTER_ULONG(x, y) NtFlushLongBuffer(x,y)
#define READ_REGISTER_UCHAR(x) *(volatile UCHAR * const)(x)
#define READ_REGISTER_USHORT(x) *(volatile USHORT * const)(x)
#define READ_REGISTER_ULONG(x) *(volatile ULONG * const)(x)
#define WRITE_REGISTER_UCHAR(x, y) *(volatile UCHAR * const)(x) = y
#define WRITE_REGISTER_USHORT(x, y) *(volatile USHORT * const)(x) = y
#define WRITE_REGISTER_ULONG(x, y) *(volatile ULONG * const)(x) = y
#endif //R4000
#ifdef R3000
#undef READ_REGISTER_UCHAR
#undef READ_REGISTER_USHORT
#undef READ_REGISTER_ULONG
#undef WRITE_REGISTER_UCHAR
#undef WRITE_REGISTER_USHORT
#undef WRITE_REGISTER_ULONG
#define READ_REGISTER_UCHAR(x) \
*(volatile UCHAR * const)(x)
#define READ_REGISTER_USHORT(x) \
*(volatile USHORT * const)(x)
#define READ_REGISTER_ULONG(x) \
*(volatile ULONG * const)(x)
#define WRITE_REGISTER_UCHAR(x, y) \
*(volatile UCHAR * const)(x) = y; FlushWriteBuffer()
#define WRITE_REGISTER_USHORT(x, y) \
*(volatile USHORT * const)(x) = y; FlushWriteBuffer()
#define WRITE_REGISTER_ULONG(x, y) \
*(volatile ULONG * const)(x) = y; FlushWriteBuffer()
#endif //R3000
#endif //_IOACCESS
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