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Annotation of XNU/iokit/Drivers/scsi/drvSymbios8xx/Sym8xxMisc.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 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: /* Sym8xxMisc.m created by russb2 on Sat 30-May-1998 */
        !            24: 
        !            25: #include "Sym8xxController.h"
        !            26: 
        !            27: /*
        !            28:  * Miscellaneous IO worker routines
        !            29:  */
        !            30: 
        !            31: UInt32 Sym8xxSCSIController::Sym8xxReadRegs( volatile UInt8 *chipRegs, UInt32 regOffset, UInt32 regSize )
        !            32: {
        !            33:     if ( regSize == 1 )
        !            34:     {
        !            35:         return chipRegs[regOffset];
        !            36:     }
        !            37:     if ( regSize == 2 )
        !            38:     {
        !            39:         return OSSwapHostToLittleInt16( *(volatile u_int16_t *)&chipRegs[regOffset] );
        !            40:     }
        !            41:     else if (regSize == 4 )
        !            42:     {
        !            43:         return OSSwapHostToLittleInt32( *(volatile UInt32 *)&chipRegs[regOffset] );
        !            44:     }
        !            45:     else
        !            46:     {
        !            47:         kprintf("SCSI(SymBios875): Sym8xxReadRegs incorrect regSize\n\r" );
        !            48:         return 0;
        !            49:     } 
        !            50: }
        !            51: 
        !            52: void Sym8xxSCSIController::Sym8xxWriteRegs( volatile UInt8 *chipRegs, UInt32 regOffset, UInt32 regSize, UInt32 regValue )
        !            53: {
        !            54:     if ( regSize == 1 )
        !            55:     {
        !            56:         chipRegs[regOffset] = regValue;
        !            57:     }
        !            58:     else if ( regSize == 2 )
        !            59:     {
        !            60:         volatile u_int16_t *p = (volatile u_int16_t *)&chipRegs[regOffset];
        !            61:         *p = OSSwapHostToLittleInt16( regValue );
        !            62:     }
        !            63:     else if ( regSize == 4 )
        !            64:     {
        !            65:         volatile UInt32 *p = (volatile UInt32 *)&chipRegs[regOffset];
        !            66:         *p = OSSwapHostToLittleInt32( regValue );
        !            67:     }
        !            68:     else
        !            69:     {
        !            70:         kprintf("SCSI(SymBios875): Sym8xxWriteRegs incorrect regSize\n\r" );
        !            71:     }
        !            72:     eieio();
        !            73: }

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