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Annotation of kernel/bsd/dev/ppc/cuda_hdw.h, 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: /*
        !            26:  * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991  
        !            27:  *              All Rights Reserved 
        !            28:  *  
        !            29:  * Permission to use, copy, modify, and distribute this software and 
        !            30:  * its documentation for any purpose and without fee is hereby granted, 
        !            31:  * provided that the above copyright notice appears in all copies and 
        !            32:  * that both the copyright notice and this permission notice appear in 
        !            33:  * supporting documentation. 
        !            34:  *  
        !            35:  * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 
        !            36:  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
        !            37:  * FOR A PARTICULAR PURPOSE. 
        !            38:  *  
        !            39:  * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 
        !            40:  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
        !            41:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 
        !            42:  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 
        !            43:  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 
        !            44:  * 
        !            45:  */
        !            46: /*
        !            47:  * Copyright 1996 1995 by Apple Computer, Inc. 1997 1996 1995 1994 1993 1992 1991  
        !            48:  *              All Rights Reserved 
        !            49:  *  
        !            50:  * Permission to use, copy, modify, and distribute this software and 
        !            51:  * its documentation for any purpose and without fee is hereby granted, 
        !            52:  * provided that the above copyright notice appears in all copies and 
        !            53:  * that both the copyright notice and this permission notice appear in 
        !            54:  * supporting documentation. 
        !            55:  *  
        !            56:  * APPLE COMPUTER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 
        !            57:  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
        !            58:  * FOR A PARTICULAR PURPOSE. 
        !            59:  *  
        !            60:  * IN NO EVENT SHALL APPLE COMPUTER BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 
        !            61:  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
        !            62:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 
        !            63:  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 
        !            64:  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 
        !            65:  */
        !            66: /*
        !            67:  * MKLINUX-1.0DR2
        !            68:  */
        !            69: #include    "via6522.h"
        !            70: 
        !            71: typedef struct VIARegisterAddress VIARegisterAddress;
        !            72: 
        !            73: struct VIARegisterAddress
        !            74: {   
        !            75:         volatile unsigned char*     dataB;
        !            76:         volatile unsigned char*     handshakeDataA;
        !            77:         volatile unsigned char*     dataDirectionB;
        !            78:         volatile unsigned char*     dataDirectionA;
        !            79:         volatile unsigned char*     timer1CounterLow;
        !            80:         volatile unsigned char*     timer1CounterHigh;
        !            81:         volatile unsigned char*     timer1LatchLow;
        !            82:         volatile unsigned char*     timer1LatchHigh;
        !            83:         volatile unsigned char*     timer2CounterLow;
        !            84:         volatile unsigned char*     timer2CounterHigh;
        !            85:         volatile unsigned char*     shift;
        !            86:         volatile unsigned char*     auxillaryControl;
        !            87:         volatile unsigned char*     peripheralControl;
        !            88:         volatile unsigned char*     interruptFlag;
        !            89:         volatile unsigned char*     interruptEnable;
        !            90:         volatile unsigned char*     dataA;
        !            91: };
        !            92: 
        !            93: 
        !            94: 
        !            95: //  Cuda to VIA signal definition.  They are all active low.
        !            96: 
        !            97: enum
        !            98: {
        !            99:     kCudaTransferRequestMask        = EVRB_XCVR,        // TREQ         (input) 
        !           100:     kCudaNegateTransferRequest      = EVRB_XCVR,        // TREQ
        !           101:     kCudaAssertTransferRequest      = ~EVRB_XCVR,       // /TREQ
        !           102: 
        !           103:     kCudaByteAcknowledgeMask        = EVRB_FULL,        // ByteAck      (output)
        !           104:     kCudaNegateByteAcknowledge      = EVRB_FULL,        // ByteAck
        !           105:     kCudaAssertByteAcknowledge      = ~EVRB_FULL,       // /ByteAck
        !           106:     
        !           107:     kCudaTransferInProgressMask     = EVRB_SYSES,       // TIP          (output)
        !           108:     kCudaNegateTransferInProgress   = EVRB_SYSES,       // TIP
        !           109:     kCudaAssertTransferInProgress   = ~EVRB_SYSES,      // /TIP
        !           110: 
        !           111:     kCudaTransferMode               = VAC_SRMD3,        // 
        !           112: 
        !           113:     kCudaDirectionMask              = VAC_SRMD4,        // 
        !           114:     kCudaSystemSend                 = VAC_SRMD4,        // 
        !           115:     kCudaSystemRecieve              = ~VAC_SRMD4,       // 
        !           116:     
        !           117:     kCudaInterruptMask              = VIE_SR,
        !           118:     kCudaInterruptDisable           = VIE_CLEAR | VIE_SR,
        !           119:     kCudaInterruptEnable            = VIE_SET | VIE_SR
        !           120: };
        !           121: 
        !           122: //  The bits from Cuda that determines the cause of an interrupt
        !           123: 
        !           124: enum
        !           125: {
        !           126:         kCudaInterruptStateMask     = kCudaTransferInProgressMask |
        !           127:                                       kCudaTransferRequestMask
        !           128: };
        !           129: 
        !           130: // Interrupt states.  Determined by kTransferRequest, kTransferInProgress and 
        !           131: // kCudaDirection.  The names are from the view of the system.
        !           132: 
        !           133: enum
        !           134: {
        !           135:         kCudaReceiveByte            = 0,                            // 0x00
        !           136:         kCudaReceiveLastByte        = kCudaNegateTransferRequest,   // 0x08
        !           137:         kCudaCollision              = kCudaSystemSend,              // 0x10
        !           138:         kCudaTransmitByte           = kCudaSystemSend |     
        !           139:                                       kCudaNegateTransferRequest,   // 0x18
        !           140:         kCudaUnexpectedAttention    = kCudaNegateTransferInProgress,// 0x20
        !           141:         kCudaIdleState              = kCudaNegateTransferInProgress |  
        !           142:                                       kCudaNegateTransferRequest,   // 0x28
        !           143:         kCudaExpectedAttention      = kCudaSystemSend |
        !           144:                                       kCudaNegateTransferInProgress,// 0x30
        !           145:         kCudaIllegalState           = kCudaSystemSend |
        !           146:                                       kCudaNegateTransferInProgress |
        !           147:                                       kCudaNegateTransferRequest    // 0x38
        !           148: };
        !           149: 
        !           150: enum
        !           151: {
        !           152:         kCudaSRQAssertMask          = 0x01,         // inactive device asserted SRQ
        !           153:         kCudaTimeOutMask            = 0x02,         // active device did not have data available
        !           154:         kCudaSRQErrorMask           = 0x04,         // device asserted excessive SRQ period
        !           155:         kCudaBusErrorMask           = 0x08,         // timing error in bit cell was detected
        !           156:         kCudaAutoPollMask           = 0x40,         // data is from an AutoPoll
        !           157:         kCudaResponseMask           = 0x80          // response Packet in progress
        !           158: };
        !           159: 
        !           160: #define cuda_write_data(theByte)  {*cuda_via_regs.shift = theByte; eieio(); }
        !           161: #define cuda_set_data_direction_to_input()  {*cuda_via_regs.auxillaryControl &= kCudaSystemRecieve; eieio(); }
        !           162: #define cuda_set_data_direction_to_output()  {*cuda_via_regs.auxillaryControl |= kCudaSystemSend; eieio(); }
        !           163: #define cuda_assert_transfer_in_progress()  {*cuda_via_regs.dataB &= kCudaAssertTransferInProgress; eieio(); }
        !           164: #define cuda_neg_transfer_in_progress()  {*cuda_via_regs.dataB |= kCudaNegateTransferInProgress; eieio(); }
        !           165: #define cuda_neg_tip_and_byteack()   {*cuda_via_regs.dataB |= kCudaNegateByteAcknowledge | kCudaNegateTransferInProgress; eieio(); }
        !           166: #define cuda_toggle_byte_ack()  {*cuda_via_regs.dataB ^= kCudaByteAcknowledgeMask; eieio(); }
        !           167: #define cuda_assert_byte_ack()   {*cuda_via_regs.dataB &= kCudaAssertByteAcknowledge; eieio(); }
        !           168: #define cuda_neg_byte_ack()  {*cuda_via_regs.dataB |= kCudaNegateByteAcknowledge; eieio(); }
        !           169: #define cuda_is_transfer_in_progress() ((*cuda_via_regs.dataB & kCudaTransferRequestMask) == 0 )
        !           170: #define cuda_disable_interrupt()  {*cuda_via_regs.interruptEnable = kCudaInterruptDisable; eieio(); }
        !           171: #define cuda_enable_interrupt()  {*cuda_via_regs.interruptEnable = kCudaInterruptEnable; eieio(); }
        !           172: #define cuda_get_interrupt_state()  (*cuda_via_regs.dataB & kCudaInterruptStateMask) | \
        !           173:                (*cuda_via_regs.auxillaryControl & kCudaDirectionMask)
        !           174: #define cuda_wait_for_transfer_request_assert() while ( (*cuda_via_regs.dataB & kCudaTransferRequestMask) != 0 ) { eieio(); } ; eieio()
        !           175: #define cuda_wait_for_transfer_request_neg() while ( (*cuda_via_regs.dataB & kCudaTransferRequestMask) == 0 ) { eieio(); } ; eieio()
        !           176: #define cuda_wait_for_interrupt() while ( (*cuda_via_regs.interruptFlag & kCudaInterruptMask) == 0 ) { eieio(); } ; eieio()

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