| 1 | /*
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| 2 | * ioaccess.h
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| 3 | *
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| 4 | * Windows Device Driver Kit
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| 5 | *
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| 6 | * This file is part of the w32api package.
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| 7 | *
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| 8 | * THIS SOFTWARE IS NOT COPYRIGHTED
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| 9 | *
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| 10 | * This source code is offered for use in the public domain. You may
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| 11 | * use, modify or distribute it freely.
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| 12 | *
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| 13 | * This code is distributed in the hope that it will be useful but
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| 14 | * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
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| 15 | * DISCLAIMED. This includes but is not limited to warranties of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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| 17 | *
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| 18 | */
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| 19 | #ifndef __IOACCESS_H
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| 20 | #define __IOACCESS_H
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| 21 |
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| 22 | #ifdef __cplusplus
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| 23 | extern "C" {
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| 24 | #endif
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| 25 |
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| 26 | #define H2I(p) PtrToUshort(p)
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| 27 |
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| 28 | #ifndef NO_PORT_MACROS
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| 29 |
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| 30 | #if defined(_X86_) || defined(_M_AMD64)
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| 31 | #define READ_REGISTER_UCHAR(r) (*(volatile UCHAR *)(r))
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| 32 | #define READ_REGISTER_USHORT(r) (*(volatile USHORT *)(r))
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| 33 | #define READ_REGISTER_ULONG(r) (*(volatile ULONG *)(r))
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| 34 | #define WRITE_REGISTER_UCHAR(r, v) (*(volatile UCHAR *)(r) = (v))
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| 35 | #define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT *)(r) = (v))
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| 36 | #define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG *)(r) = (v))
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| 37 | #define READ_PORT_UCHAR(p) (UCHAR)(__inbyte (H2I(p)))
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| 38 | #define READ_PORT_USHORT(p) (USHORT)(__inword (H2I(p)))
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| 39 | #define READ_PORT_ULONG(p) (ULONG)(__indword (H2I(p)))
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| 40 | #define WRITE_PORT_UCHAR(p, v) __outbyte (H2I(p), (v))
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| 41 | #define WRITE_PORT_USHORT(p, v) __outword (H2I(p), (v))
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| 42 | #define WRITE_PORT_ULONG(p, v) __outdword (H2I(p), (v))
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| 43 |
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| 44 | #define MEMORY_BARRIER()
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| 45 |
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| 46 | #elif defined(_PPC_) || defined(_MIPS_) || defined(_ARM_)
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| 47 |
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| 48 | #define READ_REGISTER_UCHAR(r) (*(volatile UCHAR * const)(r))
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| 49 | #define READ_REGISTER_USHORT(r) (*(volatile USHORT * const)(r))
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| 50 | #define READ_REGISTER_ULONG(r) (*(volatile ULONG * const)(r))
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| 51 | #define WRITE_REGISTER_UCHAR(r, v) (*(volatile UCHAR * const)(r) = (v))
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| 52 | #define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT * const)(r) = (v))
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| 53 | #define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG * const)(r) = (v))
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| 54 | #define READ_PORT_UCHAR(r) READ_REGISTER_UCHAR(r)
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| 55 | #define READ_PORT_USHORT(r) READ_REGISTER_USHORT(r)
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| 56 | #define READ_PORT_ULONG(r) READ_REGISTER_ULONG(r)
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| 57 | #define WRITE_PORT_UCHAR(p, v) WRITE_REGISTER_UCHAR(p, (UCHAR) (v))
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| 58 | #define WRITE_PORT_USHORT(p, v) WRITE_REGISTER_USHORT(p, (USHORT) (v))
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| 59 | #define WRITE_PORT_ULONG(p, v) WRITE_REGISTER_ULONG(p, (ULONG) (v))
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| 60 |
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| 61 | #else
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| 62 |
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| 63 | #error Unsupported architecture
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| 64 |
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| 65 | #endif
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| 66 |
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| 67 | #endif /* NO_PORT_MACROS */
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| 68 |
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| 69 | #ifdef __cplusplus
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| 70 | }
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| 71 | #endif
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| 72 |
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| 73 | #endif /* __IOACCESS_H */
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