vm_defs.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991 Carnegie Mellon University
    4  * Copyright (c) 1991 Sequent Computer Systems
    5  * All Rights Reserved.
    6  * 
    7  * Permission to use, copy, modify and distribute this software and its
    8  * documentation is hereby granted, provided that both the copyright
    9  * notice and this permission notice appear in all copies of the
   10  * software, derivative works or modified versions, and any portions
   11  * thereof, and that both notices appear in supporting documentation.
   12  * 
   13  * CARNEGIE MELLON AND SEQUENT COMPUTER SYSTEMS ALLOW FREE USE OF
   14  * THIS SOFTWARE IN ITS "AS IS" CONDITION.  CARNEGIE MELLON AND
   15  * SEQUENT COMPUTER SYSTEMS DISCLAIM ANY LIABILITY OF ANY KIND FOR
   16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   17  * 
   18  * Carnegie Mellon requests users of this software to return to
   19  * 
   20  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   21  *  School of Computer Science
   22  *  Carnegie Mellon University
   23  *  Pittsburgh PA 15213-3890
   24  * 
   25  * any improvements or extensions that they make and grant Carnegie Mellon 
   26  * the rights to redistribute these changes.
   27  */
   28 
   29 /*
   30  * HISTORY
   31  * $Log:        vm_defs.h,v $
   32  * Revision 2.3  91/07/31  18:04:53  dbg
   33  *      Changed copyright.
   34  *      [91/07/31            dbg]
   35  * 
   36  * Revision 2.2  91/05/08  13:01:36  dbg
   37  *      Make KVTOPHYS use kvtophys to avoid locking kernel pmap.
   38  *      [91/02/14            dbg]
   39  * 
   40  *      Move cpu-local mappings (slic, leds, elapsed-time counter) to
   41  *      level 1 page just below FPA.
   42  *      [90/12/17            dbg]
   43  * 
   44  *      Rewrote for pure Mach kernel.  Kernel is no longer mapped 1-1
   45  *      with physical memory.
   46  *      [90/09/27            dbg]
   47  * 
   48  */
   49 
   50 #ifndef _SQT_VM_DEFS_H_
   51 #define _SQT_VM_DEFS_H_
   52 
   53 #include <mach/i386/vm_param.h>
   54 #include <i386/pmap.h>
   55 
   56 /*
   57  * Kernel address space layout.
   58  *
   59  * Physical memory is mapped 1-1 starting at 0xC0000000.  This includes
   60  * the kernel code, data, and bss, and the kernel page table directory.
   61  * Useful IO space is mapped to allocated virtual memory.
   62  * See machine/hwparam.h for description of IO space.
   63  *
   64  * User mapping consumes 3Gig of space, starting at 0.  User segment
   65  * registers declare full 4Gig space, to allow FPA mapping to be in the
   66  * last 4Meg of the top of the 4Gig space (Intel standard).
   67  */
   68 
   69 #define PDE_MAP_SIZE    (1 << PDESHIFT)
   70                                         /* amount mapped by a page directory */
   71 
   72 #define FPA_SPACE       (1 * PDE_MAP_SIZE)
   73                                         /* 1 L1 page for this */
   74 #define VA_FPA          (0 - FPA_SPACE)
   75                                         /* mapped FPA */
   76 
   77 
   78 #define HDW_SPACE       (2 * PDE_MAP_SIZE)
   79                                         /* slic, led, etc, sync-points */
   80 
   81 #define VA_SLIC         (VA_FPA - HDW_SPACE)
   82 #define VA_LED          (VA_SLIC + I386_PGBYTES)
   83 #define VA_ETC          (VA_LED  + I386_PGBYTES)
   84 
   85 /*
   86  * Mapping between physical and virtual addresses.
   87  */
   88 #define PHYSTOKV(addr, type)    ((type)phystokv(addr))
   89 #define KVTOPHYS(addr, type)    ((type)kvtophys((vm_offset_t)(addr)))
   90 
   91 #endif  /* _SQT_VM_DEFS_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/sqt/vm_defs.h

FreeBSD/Linux Kernel Cross Reference
sys/sqt/vm_defs.h