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Annotation of sys/arch/aviion/aviion/pmap_bootstrap.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: pmap_bootstrap.c,v 1.1.1.1 2006/05/07 15:55:55 miod Exp $     */
                      2: /*
                      3:  * Copyright (c) 2001-2004, Miodrag Vallat
                      4:  * Copyright (c) 1998-2001 Steve Murphree, Jr.
                      5:  * Copyright (c) 1996 Nivas Madhur
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *      This product includes software developed by Nivas Madhur.
                     19:  * 4. The name of the author may not be used to endorse or promote products
                     20:  *    derived from this software without specific prior written permission
                     21:  *
                     22:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     23:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     24:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     25:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     26:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     27:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     28:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     29:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     30:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     31:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     32:  *
                     33:  */
                     34: /*
                     35:  * Mach Operating System
                     36:  * Copyright (c) 1991 Carnegie Mellon University
                     37:  * Copyright (c) 1991 OMRON Corporation
                     38:  * All Rights Reserved.
                     39:  *
                     40:  * Permission to use, copy, modify and distribute this software and its
                     41:  * documentation is hereby granted, provided that both the copyright
                     42:  * notice and this permission notice appear in all copies of the
                     43:  * software, derivative works or modified versions, and any portions
                     44:  * thereof, and that both notices appear in supporting documentation.
                     45:  *
                     46:  */
                     47:
                     48: #include <sys/param.h>
                     49: #include <sys/systm.h>
                     50:
                     51: #include <uvm/uvm.h>
                     52:
                     53: extern vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, vm_prot_t, u_int);
                     54: extern vaddr_t avail_start;
                     55: extern vaddr_t virtual_avail;
                     56:
                     57: #define ETHERPAGES 16  /* 64 KB */
                     58: void *etherbuf = NULL;
                     59: size_t etherlen;
                     60:
                     61: vaddr_t
                     62: pmap_bootstrap_md(vaddr_t vaddr)
                     63: {
                     64:        /*
                     65:         * Get ethernet buffer - need ETHERPAGES pages physically contiguous
                     66:         * below 16MB.
                     67:         */
                     68:        if (vaddr < 0x01000000 - ptoa(ETHERPAGES)) {
                     69:                etherlen = ptoa(ETHERPAGES);
                     70:                etherbuf = (void *)vaddr;
                     71:
                     72:                vaddr = pmap_map(vaddr, avail_start, avail_start + etherlen,
                     73:                    UVM_PROT_RW, CACHE_INH);
                     74:
                     75:                virtual_avail += etherlen;
                     76:                avail_start += etherlen;
                     77:        }
                     78:
                     79:        return vaddr;
                     80: }