Source to mach/ppc/thread_status.h

Enter a symbol's name here to quickly find it. 
/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  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 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#ifndef	_MACH_PPC_THREAD_STATUS_H_
#define _MACH_PPC_THREAD_STATUS_H_

/*
 * ppc_thread_state is the structure that is exported to user threads for 
 * use in status/mutate calls.  This structure should never change.
 *
 */

#define PPC_THREAD_STATE        1
#define PPC_FLOAT_STATE         2
#define PPC_EXCEPTION_STATE	3
#define THREAD_STATE_NONE	7
	       
struct ppc_thread_state {
	unsigned int srr0;      /* Instruction address register (PC) */
	unsigned int srr1;	/* Machine state register (supervisor) */
				/* srr1 may contain SRR_SYSCALL_VAL */
	unsigned int r0;
	unsigned int r1;
	unsigned int r2;
	unsigned int r3;
	unsigned int r4;
	unsigned int r5;
	unsigned int r6;
	unsigned int r7;
	unsigned int r8;
	unsigned int r9;
	unsigned int r10;
	unsigned int r11;
	unsigned int r12;
	unsigned int r13;
	unsigned int r14;
	unsigned int r15;
	unsigned int r16;
	unsigned int r17;
	unsigned int r18;
	unsigned int r19;
	unsigned int r20;
	unsigned int r21;
	unsigned int r22;
	unsigned int r23;
	unsigned int r24;
	unsigned int r25;
	unsigned int r26;
	unsigned int r27;
	unsigned int r28;
	unsigned int r29;
	unsigned int r30;
	unsigned int r31;

	unsigned int cr;        /* Condition register */
	unsigned int xer;	/* User's integer exception register */
	unsigned int lr;	/* Link register */
	unsigned int ctr;	/* Count register */
	unsigned int mq;	/* MQ register (601 only) */

	unsigned int pad;      /* structure TODO - check these! */
};

typedef struct ppc_thread_state ppc_thread_state_t;

/* This structure should be double-word aligned for performance */

struct ppc_float_state {
	double  fpregs[32];

	unsigned int fpscr_pad; /* fpscr is 64 bits, 32 bits of rubbish */
	unsigned int fpscr;	/* floating point status register */
};

typedef struct ppc_float_state ppc_float_state_t;

/*
 * saved state structure
 *
 * This structure corresponds to the state of the user registers as saved
 * on the stack upon kernel entry (saved in pcb). On interrupts and exceptions
 * we save all registers. On system calls we only save the registers not
 * saved by the caller.
 *
 */

struct ppc_saved_state {
	unsigned int srr0;      /* Instruction address register (PC) */
	unsigned int srr1;	/* Machine state register (supervisor) */
				/* srr1 may contain SRR_SYSCALL_VAL */
	unsigned int r0;
	unsigned int r1;
	unsigned int r2;
	unsigned int r3;
	unsigned int r4;
	unsigned int r5;
	unsigned int r6;
	unsigned int r7;
	unsigned int r8;
	unsigned int r9;
	unsigned int r10;
	unsigned int r11;
	unsigned int r12;
	unsigned int r13;
	unsigned int r14;
	unsigned int r15;
	unsigned int r16;
	unsigned int r17;
	unsigned int r18;
	unsigned int r19;
	unsigned int r20;
	unsigned int r21;
	unsigned int r22;
	unsigned int r23;
	unsigned int r24;
	unsigned int r25;
	unsigned int r26;
	unsigned int r27;
	unsigned int r28;
	unsigned int r29;
	unsigned int r30;
	unsigned int r31;

	unsigned int cr;        /* Condition register */
	unsigned int xer;	/* User's integer exception register */
	unsigned int lr;	/* Link register */
	unsigned int ctr;	/* Count register */
	unsigned int mq;	/* MQ register (601 only) */
	unsigned int pad;	/* To mirror pcb_thread_state in pcb*/

	unsigned int sr_copyin; /* SR_COPYIN is used for remapping */
	unsigned int pad2;
	unsigned int pad3;
	unsigned int pad4;
};

typedef struct ppc_saved_state ppc_saved_state_t;

/*
 * ppc_exception_state
 *
 * This structure corresponds to some additional state of the user
 * registers as saved in the PCB upon kernel entry. They are only
 * available if an exception is passed out of the kernel, and even
 * then not all are guaranteed to be updated.
 *
 * Some padding is included in this structure which allows space for
 * servers to store temporary values if need be, to maintain binary
 * compatiblity.
 */

struct ppc_exception_state {
	unsigned long dar;	/* Fault registers for coredump */
	unsigned long dsisr;
	unsigned long exception;/* number of powerpc exception taken */
	unsigned long pad0;	/* align to 16 bytes */

	unsigned long pad1[4];	/* space in PCB "just in case" */
};

typedef struct ppc_exception_state ppc_exception_state_t;

/*
 * Save State Flags
 */

#define PPC_THREAD_STATE_COUNT \
   (sizeof(struct ppc_thread_state) / sizeof(int))

#define PPC_EXCEPTION_STATE_COUNT \
   (sizeof(struct ppc_exception_state) / sizeof(int))

#define PPC_FLOAT_STATE_COUNT \
   (sizeof(struct ppc_float_state) / sizeof(int))

/*
 * Machine-independent way for servers and Mach's exception mechanism to
 * choose the most efficient state flavor for exception RPC's:
 */
#define MACHINE_THREAD_STATE		PPC_THREAD_STATE
#define MACHINE_THREAD_STATE_COUNT	PPC_THREAD_STATE_COUNT

/*
 * Largest state on this machine:
 */
#define THREAD_MACHINE_STATE_MAX	PPC_THREAD_STATE_COUNT


#define	PPC_THREAD_STATE_FLAVOR_COUNT  3

#define PPC_THREAD_STATE_FLAVOR_LIST_COUNT         \
	( PPC_THREAD_STATE_FLAVOR_COUNT *              \
		(sizeof (struct thread_state_flavor) / sizeof(int)))

#endif /* _MACH_PPC_THREAD_STATUS_H_ */