iokit/Drivers/network/drvIntel82557/i82557Inline.h

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #ifndef _I82557INLINE_H
  24 #define _I82557INLINE_H
  25
  26 #include <libkern/OSByteOrder.h>
  27 #include <libkern/OSAtomic.h>
  28
  29 //---------------------------------------------------------------------------
  30 // CSR macros.
  31
  32 #define CSR_VALUE(name, x)      (((x) & name ## _MASK) >> name ## _SHIFT)
  33 #define CSR_FIELD(name, x)      (((x) << name ## _SHIFT) & name ## _MASK)
  34 #define CSR_MASK(name, x)       ((x) << name ## _SHIFT)
  35 #define BIT(x)                          (1 << (x))
  36
  37 #define IOSync()            OSSynchronizeIO()
  38
  39 //---------------------------------------------------------------------------
  40 // CSR read & write.
  41
  42 static inline
  43 UInt8
  44 OSReadLE8(volatile void * base)
  45 {
  46         return *(volatile UInt8 *)base;
  47 }
  48
  49 static inline
  50 UInt16
  51 OSReadLE16(volatile void * base)
  52 {
  53         return OSReadLittleInt16(base, 0);
  54 }
  55
  56 static inline
  57 UInt32
  58 OSReadLE32(volatile void * base)
  59 {
  60         return OSReadLittleInt32(base, 0);
  61 }
  62
  63 static inline
  64 void
  65 OSWriteLE8(volatile void * base, UInt8 data)
  66 {
  67         *(volatile UInt8 *)base = data;
  68         IOSync();
  69 }
  70
  71 static inline
  72 void
  73 OSWriteLE16(volatile void * base, UInt16 data)
  74 {
  75         OSWriteLittleInt16(base, 0, data);
  76         IOSync();
  77 }
  78
  79 static inline
  80 void
  81 OSWriteLE32(volatile void * base, UInt32 data)
  82 {
  83         OSWriteLittleInt32(base, 0, data);
  84         IOSync();
  85 }
  86
  87 //---------------------------------------------------------------------------
  88 // Set/clear bit(s) macros.
  89
  90 #define __SET(n) \
  91 static inline void \
  92 OSSetLE##n(volatile void * base, UInt##n bit) \
  93 { \
  94         OSWriteLE##n(base, (OSReadLE##n(base) | (bit))); \
  95 }
  96
  97 #define __CLR(n) \
  98 static inline void \
  99 OSClearLE##n(volatile void * base, UInt##n bit) \
 100 { \
 101         OSWriteLE##n(base, (OSReadLE##n(base) & ~(bit))); \
 102 }
 103
 104 __SET(8)
 105 __SET(16)
 106 __SET(32)
 107
 108 __CLR(8)
 109 __CLR(16)
 110 __CLR(32)
 111
 112 #endif /* !_I82557INLINE_H */