Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/atomic_switch.h
Version:
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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 typedef unsigned char UInt8; 23 typedef unsigned short UInt16; 24 typedef unsigned long UInt32; 25 26 27 /* Support firmware CallPseudoKernel architectural extension */ 28 29 struct CallPseudoKernelDescriptor { 30 UInt32 pc; 31 UInt32 gpr0; 32 UInt32 intControlAddr; 33 UInt32 newState; 34 UInt32 intStateMask; 35 UInt32 intCR2Mask; 36 UInt32 intCR2Shift; 37 UInt32 sysContextState; 38 }; 39 typedef struct CallPseudoKernelDescriptor CallPseudoKernelDescriptor; 40 typedef CallPseudoKernelDescriptor * CallPseudoKernelDescriptorPtr; 41 typedef CallPseudoKernelDescriptor CPKD_t; 42 43 44 45 /* Support firmware ExitPseudoKernel architectural extension */ 46 47 struct ExitPseudoKernelDescriptor { 48 UInt32 pc; 49 UInt32 sp; 50 UInt32 gpr0; 51 UInt32 gpr3; 52 UInt32 cr; 53 UInt32 intControlAddr; 54 UInt32 newState; 55 UInt32 intStateMask; 56 UInt32 intCR2Mask; 57 UInt32 intCR2Shift; 58 UInt32 sysContextState; 59 UInt32 intPendingMask; 60 UInt32 intPendingPC; 61 UInt32 msrUpdate; 62 }; 63 typedef struct ExitPseudoKernelDescriptor ExitPseudoKernelDescriptor; 64 typedef ExitPseudoKernelDescriptor * ExitPseudoKernelDescriptorPtr; 65 typedef ExitPseudoKernelDescriptor EPKD_t; 66 67 68 struct EmulatorDescriptor { 69 UInt8 regMap[16]; // table mapping 68K D0..D7, A0..A7 register to PowerPC registers 70 UInt32 bootstrapVersionOffset; // offset within emulator data page of the bootstrap version string 71 UInt32 ecbOffset; // offset within emulator data page of the ECB 72 UInt32 intModeLevelOffset; // offset within emulator data page of the interrupt mode level 73 UInt32 entryAddress; // offset within text of the emulator's main entry point 74 UInt32 kcallTrapTableOffset; // offset within text of the nanokernel(!) call trap table 75 UInt32 postIntMask; // post interrupt mask 76 UInt32 clearIntMask; // clear interrupt mask 77 UInt32 testIntMask; // test interrupt mask 78 UInt32 codeSize; // total size of emulator object code (interpretive + DR) 79 UInt32 hashTableSize; // size of DR emulator's hash table 80 UInt32 drCodeStartOffset; // offset within text of the DR emulator's object code 81 UInt32 drInitOffset; // offset within DR emulator of its initialization entry point 82 UInt32 drAllocateCache; // offset within DR emulator of its cache allocation entry point 83 UInt32 dispatchTableOffset; // offset within text of the encoded instruction dispatch table 84 }; 85 typedef struct EmulatorDescriptor EmulatorDescriptor; 86 typedef EmulatorDescriptor *EmulatorDescriptorPtr; 87 88 89 enum { 90 // The following define the UInt32 gInterruptState 91 kInUninitialized = 0, // State not yet initialized 92 kInPseudoKernel = 1, // Currently executing within pseudo kernel 93 kInSystemContext = 2, // Currently executing within the system (emulator) context 94 kInAlternateContext = 3, // Currently executing within an alternate (native) context 95 kInExceptionHandler = 4, // Currently executing an exception handler 96 kOutsideMain = 5, // Currently executing outside of the main thread 97 kNotifyPending = 6, // Pending Notify Interrupt 98 99 kInterruptStateMask = 0x000F0000, // Mask to extract interrupt state from gInterruptState 100 kInterruptStateShift = 16, // Shift count to align interrupt state 101 102 kBackupCR2Mask = 0x0000000F, // Mask to extract backup CR2 from gInterruptState 103 kCR2ToBackupShift = 31-11, // Shift count to align CR2 into the backup CR2 of gInterruptState 104 // (and vice versa) 105 kCR2Mask = 0x00F00000 // Mask to extract CR2 from the PPC CR register 106 }; 107 108 109 enum { 110 kcReturnFromException = 0, 111 kcRunAlternateContext = 1, 112 kcResetSystem = 2, 113 kcVMDispatch = 3, 114 kcPrioritizeInterrupts = 4, 115 kcPowerDispatch = 5, 116 kcRTASDispatch = 6, 117 kcGetAdapterProcPtrsPPC = 12, 118 kcGetAdapterProcPtrs = 13, 119 kcCallAdapterProc = 14, 120 kcSystemCrash = 15 121 }; 122 123 #define bbMaxCode 16 124
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