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Annotation of XNU/iokit/Drivers/scsi/drvSymbios8xx/Sym8xxMisc.cpp, 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:  * 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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