1 /* 2 * ioaccess.h 3 * 4 * Windows Device Driver Kit 5 * 6 * This file is part of the w32api package. 7 * 8 * THIS SOFTWARE IS NOT COPYRIGHTED 9 * 10 * This source code is offered for use in the public domain. You may 11 * use, modify or distribute it freely. 12 * 13 * This code is distributed in the hope that it will be useful but 14 * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY 15 * DISCLAIMED. This includes but is not limited to warranties of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 17 * 18 */ 19 #ifndef __IOACCESS_H 20 #define __IOACCESS_H 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif 25 26 #define H2I(p) PtrToUshort(p) 27 28 #ifndef NO_PORT_MACROS 29 30 #if defined(_X86_) || defined(_M_AMD64) 31 #define READ_REGISTER_UCHAR(r) (*(volatile UCHAR *)(r)) 32 #define READ_REGISTER_USHORT(r) (*(volatile USHORT *)(r)) 33 #define READ_REGISTER_ULONG(r) (*(volatile ULONG *)(r)) 34 #define WRITE_REGISTER_UCHAR(r, v) (*(volatile UCHAR *)(r) = (v)) 35 #define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT *)(r) = (v)) 36 #define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG *)(r) = (v)) 37 #define READ_PORT_UCHAR(p) (UCHAR)(__inbyte (H2I(p))) 38 #define READ_PORT_USHORT(p) (USHORT)(__inword (H2I(p))) 39 #define READ_PORT_ULONG(p) (ULONG)(__indword (H2I(p))) 40 #define WRITE_PORT_UCHAR(p, v) __outbyte (H2I(p), (v)) 41 #define WRITE_PORT_USHORT(p, v) __outword (H2I(p), (v)) 42 #define WRITE_PORT_ULONG(p, v) __outdword (H2I(p), (v)) 43 44 #define MEMORY_BARRIER() 45 46 #elif defined(_PPC_) || defined(_MIPS_) || defined(_ARM_) 47 48 #define READ_REGISTER_UCHAR(r) (*(volatile UCHAR * const)(r)) 49 #define READ_REGISTER_USHORT(r) (*(volatile USHORT * const)(r)) 50 #define READ_REGISTER_ULONG(r) (*(volatile ULONG * const)(r)) 51 #define WRITE_REGISTER_UCHAR(r, v) (*(volatile UCHAR * const)(r) = (v)) 52 #define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT * const)(r) = (v)) 53 #define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG * const)(r) = (v)) 54 #define READ_PORT_UCHAR(r) READ_REGISTER_UCHAR(r) 55 #define READ_PORT_USHORT(r) READ_REGISTER_USHORT(r) 56 #define READ_PORT_ULONG(r) READ_REGISTER_ULONG(r) 57 #define WRITE_PORT_UCHAR(p, v) WRITE_REGISTER_UCHAR(p, (UCHAR) (v)) 58 #define WRITE_PORT_USHORT(p, v) WRITE_REGISTER_USHORT(p, (USHORT) (v)) 59 #define WRITE_PORT_ULONG(p, v) WRITE_REGISTER_ULONG(p, (ULONG) (v)) 60 61 #else 62 63 #error Unsupported architecture 64 65 #endif 66 67 #endif /* NO_PORT_MACROS */ 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif /* __IOACCESS_H */ 74