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Annotation of XNU/iokit/Drivers/network/drvIntel82557/i82557Inline.h, revision 1.1

1.1     ! root        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: //---------------------------------------------------------------------------
        !            27: // CSR macros.
        !            28: 
        !            29: #define CSR_VALUE(name, x)     (((x) & name ## _MASK) >> name ## _SHIFT)
        !            30: #define CSR_FIELD(name, x)     (((x) << name ## _SHIFT) & name ## _MASK)
        !            31: #define CSR_MASK(name, x)      ((x) << name ## _SHIFT)
        !            32: #define BIT(x)                         (1 << (x))
        !            33: 
        !            34: //---------------------------------------------------------------------------
        !            35: // Flush write buffers.
        !            36: 
        !            37: #ifdef __ppc__
        !            38: #define IOSync()       __asm__ ("eieio")
        !            39: #else
        !            40: #define IOSync()
        !            41: #endif
        !            42: 
        !            43: //---------------------------------------------------------------------------
        !            44: // CSR read & write.
        !            45: 
        !            46: #ifdef __BIG_ENDIAN__
        !            47: 
        !            48: #ifdef __ppc__
        !            49: 
        !            50: static inline
        !            51: UInt8
        !            52: OSReadLE8(volatile void * base)
        !            53: {
        !            54:        return *(volatile UInt8 *)base;
        !            55: }
        !            56: 
        !            57: static inline
        !            58: UInt16
        !            59: OSReadLE16(volatile void * base)
        !            60: {
        !            61:     UInt16 result;
        !            62:     __asm__ volatile("lhbrx %0, 0, %1"
        !            63:                      : "=r" (result)
        !            64:                      : "r" (base)
        !            65:                      : "r0");
        !            66:     return result;
        !            67: }
        !            68: 
        !            69: static inline
        !            70: UInt32
        !            71: OSReadLE32(volatile void * base)
        !            72: {
        !            73:     UInt32 result;
        !            74:     __asm__ volatile("lwbrx %0, 0, %1"
        !            75:                      : "=r" (result)
        !            76:                      : "r" (base)
        !            77:                      : "r0");
        !            78:     return result;
        !            79: }
        !            80: 
        !            81: static inline
        !            82: void
        !            83: OSWriteLE8(volatile void * base, UInt8 data)
        !            84: {
        !            85:        *(volatile UInt8 *)base = data;
        !            86:        IOSync();
        !            87: }
        !            88: 
        !            89: static inline
        !            90: void
        !            91: OSWriteLE16(volatile void * base, UInt16 data)
        !            92: {
        !            93:     __asm__ volatile("sthbrx %0, 0, %1"
        !            94:                      :
        !            95:                      : "r" (data), "r" (base)
        !            96:                      : "r0");
        !            97:        IOSync();
        !            98: }
        !            99: 
        !           100: static inline
        !           101: void
        !           102: OSWriteLE32(volatile void * base, UInt32 data)
        !           103: {
        !           104:     __asm__ volatile("stwbrx %0, 0, %1"
        !           105:                      :
        !           106:                      : "r" (data), "r" (base)
        !           107:                      : "r0" );
        !           108:        IOSync();
        !           109: }
        !           110: 
        !           111: #else
        !           112: #error Unknown big-endian processor type
        !           113: #endif /* __ppc__ */
        !           114: 
        !           115: #else  /* little endian processor */
        !           116: 
        !           117: static inline
        !           118: UInt8
        !           119: OSReadLE8(volatile void * base)
        !           120: {
        !           121:        return *(volatile UInt8 *)base;
        !           122: }
        !           123: 
        !           124: static inline
        !           125: UInt16
        !           126: OSReadLE16(volatile void * base)
        !           127: {
        !           128:        return *(volatile UInt16 *)base;
        !           129: }
        !           130: 
        !           131: static inline
        !           132: UInt32
        !           133: OSReadLE32(volatile void * base)
        !           134: {
        !           135:        return *(volatile UInt32 *)base;
        !           136: }
        !           137: 
        !           138: static inline
        !           139: void
        !           140: OSWriteLE8(volatile void * base, UInt8 data)
        !           141: {
        !           142:        *(volatile UInt8 *)base = data;
        !           143: }
        !           144: 
        !           145: static inline
        !           146: void
        !           147: OSWriteLE16(volatile void * base, UInt16 data)
        !           148: {
        !           149:        *(volatile UInt16 *)base = data;
        !           150: }
        !           151: 
        !           152: static inline
        !           153: void
        !           154: OSWriteLE32(volatile void * base, UInt32 data)
        !           155: {
        !           156:        *(volatile UInt32 *)base = data;
        !           157: }
        !           158: 
        !           159: #endif /* __BIG_ENDIAN__ */
        !           160: 
        !           161: //---------------------------------------------------------------------------
        !           162: // Set/clear bit(s) macros.
        !           163: 
        !           164: #define __SET(n) \
        !           165: static inline void \
        !           166: OSSetLE##n(volatile void * base, UInt##n bit) \
        !           167: { \
        !           168:        OSWriteLE##n(base, (OSReadLE##n(base) | (bit))); \
        !           169: }
        !           170: 
        !           171: #define __CLR(n) \
        !           172: static inline void \
        !           173: OSClearLE##n(volatile void * base, UInt##n bit) \
        !           174: { \
        !           175:        OSWriteLE##n(base, (OSReadLE##n(base) & ~(bit))); \
        !           176: }
        !           177:        
        !           178: __SET(8)
        !           179: __SET(16)
        !           180: __SET(32)
        !           181: 
        !           182: __CLR(8)
        !           183: __CLR(16)
        !           184: __CLR(32)
        !           185: 
        !           186: #endif /* !_I82557INLINE_H */

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