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Annotation of kernel/bsd/dev/ppc/drvSymbios8xx/Sym8xxMisc.m, revision 1.1.1.1

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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