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 | File: PseudoKernelPriv.h | |
| 24 | ||
| 25 | Contains: Interfaces for Classic environment's PseudoKernel | |
| 26 | ||
| 27 | Copyright: (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 28 | */ | |
| 29 | ||
| 30 | #include <ppc/exception.h> | |
| 31 | ||
| 32 | /* Support firmware PseudoKernel FastTrap architectural extension */ | |
| 33 | ||
| 34 | #define bbMaxTrap (16 * sizeof(long)) | |
| 35 | #define bbRFITrap bbMaxTrap | |
| 36 | ||
| 37 | extern int bb_enable_bluebox(struct savearea *); | |
| 38 | extern int bb_disable_bluebox(struct savearea *); | |
| 39 | extern int bb_settaskenv(struct savearea *); | |
| 40 | ||
| 41 | struct BlueExceptionDataArea { | |
| 42 | UInt32 srr0; // OUT PC at time of exception, IN return address | |
| 43 | UInt32 srr1; // OUT/IN msr FE0, BE, SE and FE1 bits to restore on exit | |
| 44 | UInt32 sprg0; // OUT R1 set to this value | |
| 45 | UInt32 sprg1; // OUT/IN R1 restored to this value | |
| 46 | }; | |
| 47 | typedef struct BlueExceptionDataArea * BlueExceptionDataAreaPtr; | |
| 48 | typedef struct BlueExceptionDataArea BEDA_t; | |
| 49 | ||
| 50 | /* | |
| 51 | The Blue Thread, which is running MacOS, needs to be able to handle Traps, SCs and interrupts. | |
| 52 | */ | |
| 53 | struct BlueThreadTrapDescriptor { | |
| 54 | UInt32 TrapVector; // 0=Trap | |
| 55 | UInt32 SysCallVector; // 1=SysCall | |
| 56 | UInt32 InterruptVector; // 2=Interrupt | |
| 57 | UInt32 PendingIntVector; // 3=Pending interrupt | |
| 58 | BEDA_t exceptionInfo; // Save registers at time of exception (trap/syscall) | |
| 59 | UInt32 InterruptControlWord; // Holds context state and backup CR2 bits | |
| 60 | UInt32 NewExitState; // New run state when exiting PseudoKernel | |
| 61 | UInt32 testIntMask; // Mask for a pending alternate context interrupt in backup CR2 | |
| 62 | UInt32 postIntMask; // Mask to post an interrupt | |
| 63 | }; | |
| 64 | typedef struct BlueThreadTrapDescriptor * BlueThreadTrapDescriptorPtr; | |
| 65 | typedef struct BlueThreadTrapDescriptor BTTD_t; | |
| 66 | ||
| 67 | enum { | |
| 68 | // The following define the UInt32 gInterruptState | |
| 69 | kInUninitialized = 0, // State not yet initialized | |
| 70 | kInPseudoKernel = 1, // Currently executing within pseudo kernel | |
| 71 | kInSystemContext = 2, // Currently executing within the system (emulator) context | |
| 72 | kInAlternateContext = 3, // Currently executing within an alternate (native) context | |
| 73 | kInExceptionHandler = 4, // Currently executing an exception handler | |
| 74 | kOutsideBlue = 5, // Currently executing outside of the Blue thread | |
| 75 | kNotifyPending = 6, // Pending Notify Interrupt | |
| 76 | ||
| 77 | kInterruptStateMask = 0x000F0000, // Mask to extract interrupt state from gInterruptState | |
| 78 | kInterruptStateShift = 16, // Shift count to align interrupt state | |
| 79 | ||
| 80 | kBackupCR2Mask = 0x0000000F, // Mask to extract backup CR2 from gInterruptState | |
| 81 | kCR2ToBackupShift = 31-11, // Shift count to align CR2 into the backup CR2 of gInterruptState | |
| 82 | // (and vice versa) | |
| 83 | kCR2Mask = 0x00F00000 // Mask to extract CR2 from the PPC CR register | |
| 84 | }; | |
| 85 | ||
| 86 | struct bbRupt { | |
| 87 | struct ReturnHandler rh; /* Return handler address */ | |
| 88 | }; | |
| 89 | typedef struct bbRupt bbRupt; |