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Annotation of Gnu-Mach/i386/i386at/mem.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  *
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  *
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  *
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  *
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  *
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: 
        !            27: #include <device/io_req.h>
        !            28: #include <i386/model_dep.h>
        !            29: 
        !            30: /* This provides access to any memory that is not main RAM */
        !            31: 
        !            32: /*ARGSUSED*/
        !            33: int
        !            34: memmmap(dev, off, prot)
        !            35: int            dev;
        !            36: vm_offset_t    off;
        !            37: vm_prot_t      prot;
        !            38: {
        !            39:        if (off == 0)
        !            40:                return 0;
        !            41:        else if (off < 0xa0000)
        !            42:                return -1;
        !            43:        else if (off >= 0x100000 && off < phys_last_addr)
        !            44:                return -1;
        !            45:        else
        !            46:                return i386_btop(off);
        !            47: }

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