[apple/xnu.git] / osfmk / ppc / atomic_switch.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
typedef unsigned char	UInt8;
typedef unsigned short	UInt16;
typedef unsigned long	UInt32;


/* Support firmware CallPseudoKernel architectural extension */

struct CallPseudoKernelDescriptor {
	UInt32				pc;
	UInt32				gpr0;
	UInt32				intControlAddr;
	UInt32				newState;
	UInt32				intStateMask;
	UInt32				intCR2Mask;
	UInt32				intCR2Shift;
	UInt32				sysContextState;
};
typedef struct CallPseudoKernelDescriptor CallPseudoKernelDescriptor;
typedef CallPseudoKernelDescriptor * CallPseudoKernelDescriptorPtr;
typedef CallPseudoKernelDescriptor CPKD_t;


/* Support firmware ExitPseudoKernel architectural extension */

struct ExitPseudoKernelDescriptor {
	UInt32				pc;
	UInt32				sp;
	UInt32				gpr0;
	UInt32				gpr3;
	UInt32				cr;
	UInt32				intControlAddr;
	UInt32				newState;
	UInt32				intStateMask;
	UInt32				intCR2Mask;
	UInt32				intCR2Shift;
	UInt32				sysContextState;
	UInt32				intPendingMask;
	UInt32				intPendingPC;
	UInt32				msrUpdate;
};
typedef struct ExitPseudoKernelDescriptor ExitPseudoKernelDescriptor;
typedef ExitPseudoKernelDescriptor * ExitPseudoKernelDescriptorPtr;
typedef ExitPseudoKernelDescriptor EPKD_t;


struct EmulatorDescriptor {
	UInt8		regMap[16];		// table mapping 68K D0..D7, A0..A7 register to PowerPC registers
	UInt32		bootstrapVersionOffset;	// offset within emulator data page of the bootstrap version string
	UInt32		ecbOffset;		// offset within emulator data page of the ECB
	UInt32		intModeLevelOffset;	// offset within emulator data page of the interrupt mode level
	UInt32		entryAddress;		// offset within text of the emulator's main entry point
	UInt32		kcallTrapTableOffset;	// offset within text of the nanokernel(!) call trap table
	UInt32		postIntMask;		// post interrupt mask
	UInt32		clearIntMask;		// clear interrupt mask
	UInt32		testIntMask;		// test interrupt mask
	UInt32		codeSize;		// total size of emulator object code (interpretive + DR)
	UInt32		hashTableSize;		// size of DR emulator's hash table
	UInt32		drCodeStartOffset;	// offset within text of the DR emulator's object code
	UInt32		drInitOffset;		// offset within DR emulator of its initialization entry point
	UInt32		drAllocateCache;	// offset within DR emulator of its cache allocation entry point
	UInt32		dispatchTableOffset;	// offset within text of the encoded instruction dispatch table 
};
typedef struct EmulatorDescriptor EmulatorDescriptor;
typedef EmulatorDescriptor *EmulatorDescriptorPtr;

	
enum {
											// The following define the UInt32 gInterruptState
	kInUninitialized	=	0,			// State not yet initialized
	kInPseudoKernel		=	1,			// Currently executing within pseudo kernel
	kInSystemContext	=	2,			// Currently executing within the system (emulator) context
	kInAlternateContext	=	3,			// Currently executing within an alternate (native) context
	kInExceptionHandler	=	4,			// Currently executing an exception handler
	kOutsideMain		=	5,			// Currently executing outside of the main thread
	kNotifyPending		=	6,			// Pending Notify Interrupt

	kInterruptStateMask	=	0x000F0000,	// Mask to extract interrupt state from gInterruptState
	kInterruptStateShift	=	16,			// Shift count to align interrupt state

	kBackupCR2Mask		=	0x0000000F,	// Mask to extract backup CR2 from gInterruptState
	kCR2ToBackupShift	=	31-11,		// Shift count to align CR2 into the backup CR2 of gInterruptState
											//  (and vice versa)
	kCR2Mask		=	0x00F00000  // Mask to extract CR2 from the PPC CR register 
};


enum {
	kcReturnFromException		= 0,	
	kcRunAlternateContext		= 1,
	kcResetSystem				= 2,
	kcVMDispatch				= 3,
	kcPrioritizeInterrupts		= 4,
	kcPowerDispatch				= 5,
	kcRTASDispatch				= 6,
	kcGetAdapterProcPtrsPPC		= 12,
	kcGetAdapterProcPtrs		= 13,
	kcCallAdapterProc			= 14,
	kcSystemCrash				= 15
};

#define bbMaxCode 16
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
ff6e181a A	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. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
1c79356b	12	*
ff6e181a A	13	* The Original Code and all software distributed under the License are
ff6e181a A	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
ff6e181a A	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
1c79356b A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	typedef unsigned char UInt8;
	24	typedef unsigned short UInt16;
	25	typedef unsigned long UInt32;
	26
	27
	28	/* Support firmware CallPseudoKernel architectural extension */
	29
	30	struct CallPseudoKernelDescriptor {
	31	UInt32 pc;
	32	UInt32 gpr0;
	33	UInt32 intControlAddr;
	34	UInt32 newState;
	35	UInt32 intStateMask;
	36	UInt32 intCR2Mask;
	37	UInt32 intCR2Shift;
	38	UInt32 sysContextState;
	39	};
	40	typedef struct CallPseudoKernelDescriptor CallPseudoKernelDescriptor;
	41	typedef CallPseudoKernelDescriptor * CallPseudoKernelDescriptorPtr;
	42	typedef CallPseudoKernelDescriptor CPKD_t;
	43
	44
	45
	46	/* Support firmware ExitPseudoKernel architectural extension */
	47
	48	struct ExitPseudoKernelDescriptor {
	49	UInt32 pc;
	50	UInt32 sp;
	51	UInt32 gpr0;
	52	UInt32 gpr3;
	53	UInt32 cr;
	54	UInt32 intControlAddr;
	55	UInt32 newState;
	56	UInt32 intStateMask;
	57	UInt32 intCR2Mask;
	58	UInt32 intCR2Shift;
	59	UInt32 sysContextState;
	60	UInt32 intPendingMask;
	61	UInt32 intPendingPC;
	62	UInt32 msrUpdate;
	63	};
	64	typedef struct ExitPseudoKernelDescriptor ExitPseudoKernelDescriptor;
	65	typedef ExitPseudoKernelDescriptor * ExitPseudoKernelDescriptorPtr;
	66	typedef ExitPseudoKernelDescriptor EPKD_t;
	67
	68
	69	struct EmulatorDescriptor {
	70	UInt8 regMap[16]; // table mapping 68K D0..D7, A0..A7 register to PowerPC registers
	71	UInt32 bootstrapVersionOffset; // offset within emulator data page of the bootstrap version string
	72	UInt32 ecbOffset; // offset within emulator data page of the ECB
	73	UInt32 intModeLevelOffset; // offset within emulator data page of the interrupt mode level
	74	UInt32 entryAddress; // offset within text of the emulator's main entry point
	75	UInt32 kcallTrapTableOffset; // offset within text of the nanokernel(!) call trap table
	76	UInt32 postIntMask; // post interrupt mask
	77	UInt32 clearIntMask; // clear interrupt mask
	78	UInt32 testIntMask; // test interrupt mask
	79	UInt32 codeSize; // total size of emulator object code (interpretive + DR)
	80	UInt32 hashTableSize; // size of DR emulator's hash table
	81	UInt32 drCodeStartOffset; // offset within text of the DR emulator's object code
	82	UInt32 drInitOffset; // offset within DR emulator of its initialization entry point
	83	UInt32 drAllocateCache; // offset within DR emulator of its cache allocation entry point
84	UInt32 dispatchTableOffset; // offset within text of the encoded instruction dispatch table
85	};
86	typedef struct EmulatorDescriptor EmulatorDescriptor;
87	typedef EmulatorDescriptor *EmulatorDescriptorPtr;
88
89
90	enum {
91	// The following define the UInt32 gInterruptState
92	kInUninitialized = 0, // State not yet initialized
93	kInPseudoKernel = 1, // Currently executing within pseudo kernel
94	kInSystemContext = 2, // Currently executing within the system (emulator) context
95	kInAlternateContext = 3, // Currently executing within an alternate (native) context
96	kInExceptionHandler = 4, // Currently executing an exception handler
97	kOutsideMain = 5, // Currently executing outside of the main thread
98	kNotifyPending = 6, // Pending Notify Interrupt
99
100	kInterruptStateMask = 0x000F0000, // Mask to extract interrupt state from gInterruptState
101	kInterruptStateShift = 16, // Shift count to align interrupt state
102
103	kBackupCR2Mask = 0x0000000F, // Mask to extract backup CR2 from gInterruptState
104	kCR2ToBackupShift = 31-11, // Shift count to align CR2 into the backup CR2 of gInterruptState
105	// (and vice versa)
106	kCR2Mask = 0x00F00000 // Mask to extract CR2 from the PPC CR register
107	};
108
109
110	enum {
111	kcReturnFromException = 0,
112	kcRunAlternateContext = 1,
113	kcResetSystem = 2,
114	kcVMDispatch = 3,
115	kcPrioritizeInterrupts = 4,
116	kcPowerDispatch = 5,
117	kcRTASDispatch = 6,
118	kcGetAdapterProcPtrsPPC = 12,
119	kcGetAdapterProcPtrs = 13,
120	kcCallAdapterProc = 14,
121	kcSystemCrash = 15
122	};
123
124	#define bbMaxCode 16
125