projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 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 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 24 | * | |
| 25 | * AppleATAPIIXTiming.h - Timing tables. | |
| 26 | * | |
| 27 | * HISTORY | |
| 28 | * | |
| 29 | */ | |
| 30 | ||
| 31 | #ifndef _APPLEATAPIIXTIMING_H | |
| 32 | #define _APPLEATAPIIXTIMING_H | |
| 33 | ||
| 34 | /* | |
| 35 | * Supported transfer protocols. Entries in this table must map to the | |
| 36 | * entries in ATATimingProtocol table. | |
| 37 | */ | |
| 38 | typedef enum { | |
| 39 | kPIIXProtocolPIO = 0, | |
| 40 | kPIIXProtocolDMA, | |
| 41 | kPIIXProtocolUDMA33, | |
| 42 | kPIIXProtocolUDMA66, | |
| 43 | kPIIXProtocolLast | |
| 44 | } PIIXProtocol; | |
| 45 | ||
| 46 | /* | |
| 47 | * PIIX PIO/DMA timing table. | |
| 48 | */ | |
| 49 | typedef struct { | |
| 50 | UInt8 pioMode; // PIO mode | |
| 51 | UInt8 swDMAMode; // single-word DMA mode (obsolete) | |
| 52 | UInt8 mwDMAMode; // multiword DMA mode | |
| 53 | UInt8 isp; // IORDY sample point in PCI clocks | |
| 54 | UInt8 rtc; // Recovery time in PCI clocks | |
| 55 | UInt16 cycle; // cycle time in ns | |
| 56 | } PIIXTiming; | |
| 57 | ||
| 58 | #define _NVM_ 0xff // not a valid mode | |
| 59 | ||
| 60 | static const | |
| 61 | PIIXTiming PIIXPIOTimingTable[] = { | |
| 62 | /* PIO SW MW ISP RTC CYCLE (ns) */ | |
| 63 | {0, 0, 0, 5, 4, 600}, | |
| 64 | {1, 1, _NVM_, 5, 4, 600}, | |
| 65 | {2, 2, _NVM_, 4, 4, 240}, | |
| 66 | {3, _NVM_, 1, 3, 3, 180}, | |
| 67 | {4, _NVM_, 2, 3, 1, 120}, | |
| 68 | {5, _NVM_, 2, 3, 1, 120}, | |
| 69 | }; | |
| 70 | ||
| 71 | static const UInt8 PIIXPIOTimingTableSize = sizeof(PIIXPIOTimingTable) / | |
| 72 | sizeof(PIIXPIOTimingTable[0]); | |
| 73 | ||
| 74 | /* | |
| 75 | * PIIX Ultra-DMA/33 timing table. | |
| 76 | */ | |
| 77 | typedef struct { | |
| 78 | UInt8 mode; // mode number | |
| 79 | UInt8 ct; // cycle time in PCI clocks | |
| 80 | UInt8 rp; // Ready to Pause time in PCI clocks | |
| 81 | UInt8 bits; // register bit setting | |
| 82 | UInt16 strobe; // strobe period (cycle) in ns | |
| 83 | } PIIXUDMATiming; | |
| 84 | ||
| 85 | static const | |
| 86 | PIIXUDMATiming PIIXUDMATimingTable[] = { | |
| 87 | /* MODE CT RP BITS STROBE/CYCLE (ns) */ | |
| 88 | {0, 4, 6, 0, 120}, | |
| 89 | {1, 3, 5, 1, 90}, | |
| 90 | {2, 2, 4, 2, 60}, | |
| 91 | }; | |
| 92 | ||
| 93 | static const UInt8 | |
| 94 | PIIXUDMATimingTableSize = sizeof(PIIXUDMATimingTable) / | |
| 95 | sizeof(PIIXUDMATimingTable[0]); | |
| 96 | ||
| 97 | /* | |
| 98 | * For each drive, the following table will store the chosen timings | |
| 99 | * for each supported protocol. | |
| 100 | */ | |
| 101 | typedef struct { | |
| 102 | UInt8 activeTimings[kPIIXProtocolLast]; // selected timings | |
| 103 | UInt8 validTimings[kPIIXProtocolLast]; // calculated timings | |
| 104 | UInt32 validFlag; | |
| 105 | UInt32 activeFlag; | |
| 106 | } PIIXSelectedTimings; | |
| 107 | ||
| 108 | /* | |
| 109 | * Convert from ATATimingProtocol to PIIXProtocol. | |
| 110 | */ | |
| 111 | inline PIIXProtocol ataToPIIXProtocol(ATATimingProtocol timingProtocol) | |
| 112 | { | |
| 113 | int piixProtocol = kPIIXProtocolPIO; | |
| 114 | int ataProtocol = timingProtocol; | |
| 115 | ||
| 116 | while (ataProtocol != 1) { | |
| 117 | ataProtocol >>= 1; piixProtocol++; | |
| 118 | } | |
| 119 | return ((PIIXProtocol) piixProtocol); | |
| 120 | } | |
| 121 | ||
| 122 | /* | |
| 123 | * Misc macros to get information from the PIIXSelectedTimings table. | |
| 124 | */ | |
| 125 | #define PIIX_ACTIVATE_PROTOCOL(p) { \ | |
| 126 | timings[unit].activeTimings[p] = timings[unit].validTimings[p]; \ | |
| 127 | timings[unit].activeFlag |= (1 << (p)); \ | |
| 128 | } | |
| 129 | ||
| 130 | #define PIIX_DEACTIVATE_PROTOCOL(p) { \ | |
| 131 | timings[unit].activeFlag &= ~(1 << (p)); \ | |
| 132 | } | |
| 133 | ||
| 134 | #define PIIX_GET_ACTIVE_TIMING(p) (timings[unit].activeTimings[p]) | |
| 135 | ||
| 136 | #define PIIX_PROTOCOL_IS_ACTIVE(p) ((bool) \ | |
| 137 | (timings[unit].activeFlag & (1 << (p)))) | |
| 138 | ||
| 139 | #define PIIX_PROTOCOL_IS_VALID(p) ((bool) \ | |
| 140 | (timings[unit].validFlag & (1 << (p)))) | |
| 141 | ||
| 142 | #endif /* !_APPLEATAPIIXTIMING_H */ |