67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
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/*
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* ioaccess.h
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*
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* Windows Device Driver Kit
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*
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* This file is part of the w32api package.
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*
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* THIS SOFTWARE IS NOT COPYRIGHTED
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*
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* This source code is offered for use in the public domain. You may
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* use, modify or distribute it freely.
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*
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* This code is distributed in the hope that it will be useful but
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* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
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* DISCLAIMED. This includes but is not limited to warranties of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#ifndef __IOACCESS_H
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#define __IOACCESS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define H2I(p) PtrToUshort(p)
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#ifndef NO_PORT_MACROS
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#if defined(_X86_) || defined(_M_AMD64)
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#define READ_REGISTER_UCHAR(r) (*(volatile UCHAR *)(r))
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#define READ_REGISTER_USHORT(r) (*(volatile USHORT *)(r))
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#define READ_REGISTER_ULONG(r) (*(volatile ULONG *)(r))
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#define WRITE_REGISTER_UCHAR(r, v) (*(volatile UCHAR *)(r) = (v))
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#define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT *)(r) = (v))
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#define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG *)(r) = (v))
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#define READ_PORT_UCHAR(p) (UCHAR)(__inbyte (H2I(p)))
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#define READ_PORT_USHORT(p) (USHORT)(__inword (H2I(p)))
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#define READ_PORT_ULONG(p) (ULONG)(__indword (H2I(p)))
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#define WRITE_PORT_UCHAR(p, v) __outbyte (H2I(p), (v))
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#define WRITE_PORT_USHORT(p, v) __outword (H2I(p), (v))
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#define WRITE_PORT_ULONG(p, v) __outdword (H2I(p), (v))
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#elif defined(_PPC_) || defined(_MIPS_) || defined(_ARM_)
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#define READ_REGISTER_UCHAR(r) (*(volatile UCHAR * const)(r))
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#define READ_REGISTER_USHORT(r) (*(volatile USHORT * const)(r))
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#define READ_REGISTER_ULONG(r) (*(volatile ULONG * const)(r))
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#define WRITE_REGISTER_UCHAR(r, v) (*(volatile UCHAR * const)(r) = (v))
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#define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT * const)(r) = (v))
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#define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG * const)(r) = (v))
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#define READ_PORT_UCHAR(r) READ_REGISTER_UCHAR(r)
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#define READ_PORT_USHORT(r) READ_REGISTER_USHORT(r)
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#define READ_PORT_ULONG(r) READ_REGISTER_ULONG(r)
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#define WRITE_PORT_UCHAR(p, v) WRITE_REGISTER_UCHAR(p, (UCHAR) (v))
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#define WRITE_PORT_USHORT(p, v) WRITE_REGISTER_USHORT(p, (USHORT) (v))
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#define WRITE_PORT_ULONG(p, v) WRITE_REGISTER_ULONG(p, (ULONG) (v))
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#else
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#error Unsupported architecture
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#endif
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#endif /* NO_PORT_MACROS */
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#endif /* __IOACCESS_H */
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