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git.saurik.com Git - apple/xnu.git/blob - iokit/Drivers/scsi/drvSymbios8xx/Sym8xxMisc.cpp
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
4 * @APPLE_LICENSE_HEADER_START@
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.
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
20 * @APPLE_LICENSE_HEADER_END@
23 /* Sym8xxMisc.m created by russb2 on Sat 30-May-1998 */
25 #include "Sym8xxController.h"
28 * Miscellaneous IO worker routines
31 UInt32
Sym8xxSCSIController::Sym8xxReadRegs( volatile UInt8
*chipRegs
, UInt32 regOffset
, UInt32 regSize
)
35 return chipRegs
[regOffset
];
39 return OSSwapHostToLittleInt16( *(volatile u_int16_t
*)&chipRegs
[regOffset
] );
41 else if (regSize
== 4 )
43 return OSSwapHostToLittleInt32( *(volatile UInt32
*)&chipRegs
[regOffset
] );
47 kprintf("SCSI(SymBios875): Sym8xxReadRegs incorrect regSize\n\r" );
52 void Sym8xxSCSIController::Sym8xxWriteRegs( volatile UInt8
*chipRegs
, UInt32 regOffset
, UInt32 regSize
, UInt32 regValue
)
56 chipRegs
[regOffset
] = regValue
;
58 else if ( regSize
== 2 )
60 volatile u_int16_t
*p
= (volatile u_int16_t
*)&chipRegs
[regOffset
];
61 *p
= OSSwapHostToLittleInt16( regValue
);
63 else if ( regSize
== 4 )
65 volatile UInt32
*p
= (volatile UInt32
*)&chipRegs
[regOffset
];
66 *p
= OSSwapHostToLittleInt32( regValue
);
70 kprintf("SCSI(SymBios875): Sym8xxWriteRegs incorrect regSize\n\r" );