1: /* Declarations and macros for the basic Mach things set at startup.
    2:    Copyright (C) 1993, 1994, 1997 Free Software Foundation, Inc.
    3:    This file is part of the GNU C Library.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #ifndef _MACH_INIT_H
   21: 
   22: #define _MACH_INIT_H    1
   23: 
   24: #include <mach/mach_types.h>
   25: 
   26: /* Return the current task's task port.  */
   27: extern mach_port_t __mach_task_self (void);
   28: extern mach_port_t mach_task_self (void);
   29: 
   30: /* This cache is initialized at startup.  */
   31: extern mach_port_t __mach_task_self_;
   32: #define __mach_task_self()      (__mach_task_self_ + 0)      /* Not an lvalue.  */
   33: #define mach_task_self()        (__mach_task_self ())
   34: 
   35: /* Kernel page size.  */
   36: extern vm_size_t __vm_page_size;
   37: extern vm_size_t vm_page_size;
   38: 
   39: /* Round the address X up to a page boundary.  */
   40: #define round_page(x)   \
   41:   ((((vm_offset_t) (x) + __vm_page_size - 1) / __vm_page_size) * \
   42:    __vm_page_size)
   43: 
   44: /* Truncate the address X down to a page boundary.  */
   45: #define trunc_page(x)   \
   46:   ((((vm_offset_t) (x)) / __vm_page_size) * __vm_page_size)
   47: 
   48: #endif  /* mach_init.h */