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Annotation of XNU/osfmk/ppc/atomic_switch.h, revision 1.1

1.1     ! root        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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