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/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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/**
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 ------------
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 CVS :        $Id: addregio.c,v 1.1.1.1 2002-03-29 14:12:52 pj Exp $
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 File:        $File$
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 Revision:    $Revision: 1.1.1.1 $
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 Last update: $Date: 2002-03-29 14:12:52 $
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 ------------
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this code is from:
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List-based Memory Management, from OsKit.
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**/
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/*
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 * Copyright (C) 2000 Paolo Gai
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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/*
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 * Copyright (c) 1995, 1998 University of Utah and the Flux Group.
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 * All rights reserved.
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 *
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 * This file is part of the Flux OSKit.  The OSKit is free software, also known
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 * as "open source;" you can redistribute it and/or modify it under the terms
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 * of the GNU General Public License (GPL), version 2, as published by the Free
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 * Software Foundation (FSF).  To explore alternate licensing terms, contact
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 * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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 *
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 * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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 * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
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 * received a copy of the GPL along with the OSKit; see the file COPYING.  If
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 * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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 */
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#include <kernel/lmm.h>
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#define assert(test) assertk(test)
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void lmm_add_region(lmm_t *lmm, lmm_region_t *reg,
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                    void *addr, size_t size,
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                    lmm_flags_t flags, lmm_pri_t pri)
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{
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        DWORD min = (DWORD)addr;
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        DWORD max = min + size;
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        struct lmm_region **rp, *r;
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        /* Align the start and end addresses appropriately.  */
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        min = (min + ALIGN_MASK) & ~ALIGN_MASK;
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        max &= ~ALIGN_MASK;
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        /* If there's not enough memory to do anything with,
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           then just drop the region on the floor.
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           Since we haven't put it on the lmm's list,
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           we'll never see it again.  */
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        if (max <= min)
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                return;
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        /* Initialize the new region header.  */
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        reg->nodes = 0;
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        reg->min = min;
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        reg->max = max;
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        reg->flags = flags;
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        reg->pri = pri;
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        reg->free = 0;
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        /* Add the region to the lmm's region list in descending priority order.
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           For regions with the same priority, sort from largest to smallest
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           to reduce the average amount of list traversing we need to do.  */
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        for (rp = &lmm->regions;
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             (r = *rp) && ((r->pri > pri) ||
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                           ((r->pri == pri) &&
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                            (r->max - r->min > reg->max - reg->min)));
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             rp = &r->next)
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        {
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                assert(r != reg);
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                assert((reg->max <= r->min) || (reg->min >= r->max));
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        }
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        reg->next = r;
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        *rp = reg;
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}
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