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Annotation of sys/arch/aviion/aviion/pmap_bootstrap.c, Revision 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: }