osfmk/ppc/thread.h

   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  * @OSF_COPYRIGHT@
  24  */
  25
  26 /*
  27  *      File:   machine/thread.h
  28  *
  29  *      This file contains the structure definitions for the thread
  30  *      state as applied to PPC processors.
  31  */
  32
  33 #ifndef _PPC_THREAD_H_
  34 #define _PPC_THREAD_H_
  35
  36 #include <mach/machine/vm_types.h>
  37
  38 /*
  39  * Return address of the function that called current function, given
  40  *      address of the first parameter of current function. We can't
  41  *      do it this way, since parameter was copied from a register
  42  *      into a local variable. Call an assembly sub-function to
  43  *      return this.
  44  */
  45
  46 extern vm_offset_t getrpc(void);
  47 #define GET_RETURN_PC(addr)     getrpc()
  48
  49 #define STACK_IKS(stack)                \
  50         ((vm_offset_t)(((vm_offset_t)stack)+KERNEL_STACK_SIZE)-FM_SIZE)
  51
  52 #define syscall_emulation_sync(task) /* do nothing */
  53
  54 /*
  55  * Defining this indicates that MD code will supply an exception()
  56  * routine, conformant with kern/exception.c (dependency alert!)
  57  * but which does wonderfully fast, machine-dependent magic.
  58  */
  59
  60 #define MACHINE_FAST_EXCEPTION 1
  61
  62 #endif  /* _PPC_THREAD_H_ */
  63
  64