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Annotation of kernel/bsd/dev/ppc/drvSymbios8xx/Sym8xxMisc.m, 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:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Sym8xxMisc.m created by russb2 on Sat 30-May-1998 */
        !            26: 
        !            27: #import "Sym8xxController.h"
        !            28: 
        !            29: @implementation Sym8xxController
        !            30: @end
        !            31: 
        !            32: /*
        !            33:  * Miscellaneous IO worker routines
        !            34:  */
        !            35: 
        !            36: u_int32_t Sym8xxReadRegs( volatile u_int8_t *chipRegs, u_int32_t regOffset, u_int32_t regSize )
        !            37: {
        !            38:     if ( regSize == 1 )
        !            39:     {
        !            40:         return chipRegs[regOffset];
        !            41:     }
        !            42:     if ( regSize == 2 )
        !            43:     {
        !            44:         return EndianSwap16( *(volatile u_int16_t *)&chipRegs[regOffset] );
        !            45:     }
        !            46:     else if (regSize == 4 )
        !            47:     {
        !            48:         return EndianSwap32( *(volatile u_int32_t *)&chipRegs[regOffset] );
        !            49:     }
        !            50:     else
        !            51:     {
        !            52:         kprintf("SCSI(SymBios875): Sym8xxReadRegs incorrect regSize\n\r" );
        !            53:         return 0;
        !            54:     } 
        !            55: }
        !            56: 
        !            57: void Sym8xxWriteRegs( volatile u_int8_t *chipRegs, u_int32_t regOffset, u_int32_t regSize, u_int32_t regValue )
        !            58: {
        !            59:     if ( regSize == 1 )
        !            60:     {
        !            61:         chipRegs[regOffset] = regValue;
        !            62:     }
        !            63:     else if ( regSize == 2 )
        !            64:     {
        !            65:         volatile u_int16_t *p = (volatile u_int16_t *)&chipRegs[regOffset];
        !            66:         *p = EndianSwap16( regValue );
        !            67:     }
        !            68:     else if ( regSize == 4 )
        !            69:     {
        !            70:         volatile u_int32_t *p = (volatile u_int32_t *)&chipRegs[regOffset];
        !            71:         *p = EndianSwap32( regValue );
        !            72:     }
        !            73:     else
        !            74:     {
        !            75:         kprintf("SCSI(SymBios875): Sym8xxWriteRegs incorrect regSize\n\r" );
        !            76:     }
        !            77:     eieio();
        !            78: }

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