1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 File: PseudoKernelPriv.h 30 31 Contains: Interfaces for Classic environment's PseudoKernel 32 33 Copyright: (c) 2000 Apple Computer, Inc. All rights reserved. 34*/ 35 36#include <libkern/OSTypes.h> 37 38#include <ppc/exception.h> 39 40/* Support firmware PseudoKernel FastTrap architectural extension */ 41 42#define bbMaxTrap (16 * sizeof(long)) 43#define bbRFITrap bbMaxTrap 44 45extern int bb_enable_bluebox(struct savearea *); 46extern int bb_disable_bluebox(struct savearea *); 47extern int bb_settaskenv(struct savearea *); 48 49kern_return_t syscall_notify_interrupt(void); 50 51struct BlueExceptionDataArea { 52 UInt32 srr0; // OUT PC at time of exception, IN return address 53 UInt32 srr1; // OUT/IN msr FE0, BE, SE and FE1 bits to restore on exit 54 UInt32 sprg0; // OUT R1 set to this value 55 UInt32 sprg1; // OUT/IN R1 restored to this value 56}; 57typedef struct BlueExceptionDataArea * BlueExceptionDataAreaPtr; 58typedef struct BlueExceptionDataArea BEDA_t; 59 60/* 61 The Blue Thread, which is running MacOS, needs to be able to handle Traps, SCs and interrupts. 62*/ 63struct BlueThreadTrapDescriptor { 64 UInt32 TrapVector; // 0=Trap 65 UInt32 SysCallVector; // 1=SysCall 66 UInt32 InterruptVector; // 2=Interrupt 67 UInt32 PendingIntVector; // 3=Pending interrupt 68 BEDA_t exceptionInfo; // Save registers at time of exception (trap/syscall) 69 UInt32 InterruptControlWord; // Holds context state and backup CR2 bits 70 UInt32 NewExitState; // New run state when exiting PseudoKernel 71 UInt32 testIntMask; // Mask for a pending alternate context interrupt in backup CR2 72 UInt32 postIntMask; // Mask to post an interrupt 73}; 74typedef struct BlueThreadTrapDescriptor * BlueThreadTrapDescriptorPtr; 75typedef struct BlueThreadTrapDescriptor BTTD_t; 76 77enum { 78 // The following define the UInt32 gInterruptState 79 kInUninitialized = 0, // State not yet initialized 80 kInPseudoKernel = 1, // Currently executing within pseudo kernel 81 kInSystemContext = 2, // Currently executing within the system (emulator) context 82 kInAlternateContext = 3, // Currently executing within an alternate (native) context 83 kInExceptionHandler = 4, // Currently executing an exception handler 84 kOutsideBlue = 5, // Currently executing outside of the Blue thread 85 kNotifyPending = 6, // Pending Notify Interrupt 86 87 kInterruptStateMask = 0x000F0000, // Mask to extract interrupt state from gInterruptState 88 kInterruptStateShift = 16, // Shift count to align interrupt state 89 90 kBackupCR2Mask = 0x0000000F, // Mask to extract backup CR2 from gInterruptState 91 kCR2ToBackupShift = 31-11, // Shift count to align CR2 into the backup CR2 of gInterruptState 92 // (and vice versa) 93 kCR2Mask = 0x00F00000 // Mask to extract CR2 from the PPC CR register 94}; 95 96struct bbRupt { 97 struct ReturnHandler rh; /* Return handler address */ 98}; 99typedef struct bbRupt bbRupt; 100