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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 (c) 1994-1996 NeXT Software, Inc. All rights reserved.
27: * Copyright 1997 Apple Computer Inc. All Rights Reserved.
28: * @author Martin Minow mailto:[email protected]
29: * @revision 1997.02.13 Initial conversion from AMDPCSCSIDriver sources.
30: *
31: * Set tabs every 4 characters.
32: *
33: * Apple96PCIDBDMA.h - Minimal DBDMA Handler for the Apple 96 PCI driver. This is
34: * a temporary file until "real" DBDMA support appears.
35: *
36: * Edit History
37: * 1997.02.13 MM Initial conversion from AMDPCSCSIDriver sources.
38: * 1997.07.18 MM Added USE_CURIO_METHODS and wrote macros for the
39: * one-liner methods.
40: */
41:
42: #import "Apple96SCSI.h"
43:
44: /**
45: * Copyright 1984-1997 Apple Computer Inc. All Rights Reserved.
46: * @author Martin Minow mailto:[email protected]
47: * @revision 1997.02.13 Initial conversion from Copland D12 DBDMA.Rev 9 sources.
48: *
49: * Set tabs every 4 characters.
50: *
51: * AppleDBDMADefinitions.h - registers and inline functions for the DBDMA memory controller.
52: *
53: * Edit History
54: * 1997.02.13 MM Initial conversion from AMDPCSCSIDriver sources.
55: */
56:
57: #import "Apple96DBDMADefs.h"
58: #import <machdep/ppc/proc_reg.h>
59:
60: #if 1
61: /**
62: * This is a temporary implementation of EndianSwap32Bit until
63: * the correct library/method is made available.
64: * @param value The value to change
65: * @result The value endian-swapped.
66: */
67: static inline unsigned EndianSwap32Bit(
68: unsigned value
69: )
70: {
71:
72: register unsigned temp;
73:
74: temp = ((value & 0xFF000000) >> 24);
75: temp |= ((value & 0x00FF0000) >> 8);
76: temp |= ((value & 0x0000FF00) << 8);
77: temp |= ((value & 0x000000FF) << 24);
78: return (temp);
79: }
80: #endif
81:
82: /*
83: * Don't Endian-swap register read/write operations.
84: */
85: #define __DBDMA_READ(reg) EndianSwap32Bit(*((volatile UInt32 *) &gDBDMALogicalAddress->reg))
86: #define __DBDMA_WRITE(reg, value) do { \
87: *((volatile UInt32 *) &gDBDMALogicalAddress->reg) = EndianSwap32Bit(value); \
88: SynchronizeIO(); \
89: } while (0)
90:
91: #define DBDMASetChannelControl(ctlValue) do { \
92: SynchronizeIO(); \
93: __DBDMA_WRITE(channelControl, ctlValue); \
94: SynchronizeIO(); \
95: } while (0)
96: #define DBDMAGetChannelStatus() __DBDMA_READ(channelStatus)
97: #define DBDMAGetCommandPtr() __DBDMA_READ(commandPtrLo)
98: #define DBDMASetCommandPtr(cclPtr) __DBDMA_WRITE(commandPtrLo, cclPtr)
99: #define DBDMAGetInterruptSelect() __DBDMA_READ(interruptSelect)
100: #define DBDMASetInterruptSelect(intSelValue) __DBDMA_WRITE(interruptSelect, intSelValue)
101: #define DBDMAGetBranchSelect() __DBDMA_READ(branchSelect)
102: #define DBDMASetBranchSelect(braSelValue) __DBDMA_WRITE(branchSelect, braSelValue)
103: #define DBDMAGetWaitSelect() __DBDMA_READ(waitSelect)
104: #define DBDMASetWaitSelect(waitSelValue) __DBDMA_WRITE(waitSelect, waitSelValue)
105:
106:
107: /*
108: * Construct a DBDMA Channel Command descriptor with no command dependencies.
109: * Opcode and address may not have side-effects.
110: * void MakeCCDescriptor(
111: * DBDMADescriptor descriptorPtr,
112: * unsigned long opcode,
113: * unsigned long addr -- physical address
114: * );
115: */
116: #define MakeCCDescriptor(descriptorPtr, opcode, addr) do { \
117: (descriptorPtr)->address = EndianSwap32Bit(addr); \
118: (descriptorPtr)->cmdDep = 0; \
119: (descriptorPtr)->result = EndianSwap32Bit(0xDEADBEEF); \
120: sync(); \
121: (descriptorPtr)->operation = EndianSwap32Bit(opcode); \
122: sync(); \
123: } while (0)
124: /*
125: * Construct a DBDMA Channel Command descriptor with command dependencies.
126: * Opcode, address, and dependency may not have side-effects.
127: * void MakeCmdDepCCDescriptor(
128: * DBDMADescriptor descriptorPtr,
129: * unsigned long opcode,
130: * unsigned long addr, -- physical address
131: * unsigned long dependency
132: * );
133: */
134: #define MakeCmdDepCCDescriptor(descriptorPtr, opcode, addr, dep) do { \
135: (descriptorPtr)->address = EndianSwap32Bit(addr); \
136: (descriptorPtr)->cmdDep = EndianSwap32Bit(dep); \
137: (descriptorPtr)->result = EndianSwap32Bit(0xDEADBEEF); \
138: sync(); \
139: (descriptorPtr)->operation = EndianSwap32Bit(opcode); \
140: sync(); \
141: } while (0)
142: #define GetCCOperation(descriptorPtr) \
143: (EndianSwap32Bit((descriptorPtr)->operation))
144: #define SetCCOperation(descriptorPtr, opcode) \
145: ((descriptorPtr)->operation = EndianSwap32Bit(opcode))
146: #define GetCCAddress(descriptorPtr) \
147: (EndianSwap32Bit((descriptorPtr)->address))
148: #define SetCCAddress(descriptorPtr, addr) \
149: ((descriptorPtr)->address = EndianSwap32Bit(addr))
150: #define GetCCCmdDep(descriptorPtr) \
151: (EndianSwap32Bit((descriptorPtr)->cmdDep))
152: #define SetCCCmdDep(descriptorPtr, cmdDepValue) \
153: ((descriptorPtr)->cmdDep = EndianSwap32Bit(cmdDepValue))
154: #define GetCCResult(descriptorPtr) \
155: (EndianSwap32Bit((descriptorPtr)->result))
156: #define SetCCResult(descriptorPtr, resultValue) \
157: ((descriptorPtr)->result = EndianSwap32Bit(resultValue))
158:
159: /*
160: * These macros implement the DBDMA interface.
161: */
162: #define __DBDMAreset() do { \
163: DBDMASetChannelControl( \
164: kdbdmaClrRun \
165: | kdbdmaClrPause \
166: | kdbdmaClrDead \
167: ); \
168: } while (0)
169:
170: #define __DBDMAspinUntilIdle() do { \
171: SynchronizeIO(); \
172: } while ((DBDMAGetChannelStatus() & kdbdmaActive) != 0); \
173:
174: #define __DBDMAstartTransfer() do { \
175: DBDMASetChannelControl(kdbdmaSetRun | kdbdmaSetWake); \
176: } while (0)
177:
178: #define __DBDMAstopTransfer() __DBDMAreset()
179:
180: #if USE_CURIO_METHODS
181: #define DBDMAreset() [self dbdmaReset]
182: #define DBDMAstartTransfer() [self dbdmaStartTransfer]
183: #define DBDMAstopTransfer() [self dbdmaStopTransfer]
184: #define DBDMAspinUntilIdle() [self dbdmaSpinUntilIdle]
185: #else
186: #define DBDMAreset() __DBDMAreset()
187: #define DBDMAstartTransfer() __DBDMAstartTransfer()
188: #define DBDMAstopTransfer() __DBDMAstopTransfer()
189: #define DBDMAspinUntilIdle() __DBDMAspinUntilIdle()
190: #endif /* USE_CURIO_METHODS */
191:
192: @interface Apple96_SCSI(Curio_DBDMA)
193:
194: /**
195: * Quit: stop the DBDMA controller and free all memory.
196: * This is always a method.
197: */
198: - (void) dbdmaTerminate;
199:
200: #if USE_CURIO_METHODS
201: /**
202: * Stop the DBDMA controller
203: */
204: - (void) dbdmaReset;
205:
206: /**
207: * Start a DMA operation.
208: */
209: - (void) dbdmaStartTransfer;
210:
211: /**
212: * Stop a DMA operation.
213: */
214: - (void) dbdmaStopTransfer;
215:
216: /**
217: * Spin-wait until the DBDMA channel is inactive. This should be
218: * timed to prevent deadlock.
219: */
220: - (void) dbdmaSpinUntilIdle;
221:
222: #endif /* USE_CURIO_METHODS */
223: @end
224:
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