frame.c

Go to the documentation of this file.
00001 /*
00002  * Copyright (C) 2005 Martin Decky
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00035 #include <arch/boot/boot.h>
00036 #include <arch/mm/frame.h>
00037 #include <arch/mm/memory_init.h>
00038 #include <mm/frame.h>
00039 #include <align.h>
00040 #include <macros.h>
00041 
00042 __address last_frame = 0;
00043 
00044 void frame_arch_init(void)
00045 {
00046         pfn_t minconf = 2;
00047         count_t i;
00048         pfn_t start, conf;
00049         size_t size;
00050         
00051         for (i = 0; i < bootinfo.memmap.count; i++) {
00052                 start = ADDR2PFN(ALIGN_UP(bootinfo.memmap.zones[i].start, FRAME_SIZE));
00053                 size = SIZE2FRAMES(ALIGN_DOWN(bootinfo.memmap.zones[i].size, FRAME_SIZE));
00054                 
00055                 if ((minconf < start) || (minconf >= start + size))
00056                         conf = start;
00057                 else
00058                         conf = minconf;
00059                 
00060                 zone_create(start, size, conf, 0);
00061                 if (last_frame < ALIGN_UP(bootinfo.memmap.zones[i].start + bootinfo.memmap.zones[i].size, FRAME_SIZE))
00062                         last_frame = ALIGN_UP(bootinfo.memmap.zones[i].start + bootinfo.memmap.zones[i].size, FRAME_SIZE);
00063         }
00064 
00065         /* First is exception vector, second is 'implementation specific', third and fourth is reserved */
00066         frame_mark_unavailable(0, 4);
00067         
00068 }
00069 

Generated on Sun Jun 18 17:28:04 2006 for HelenOS Kernel (ppc64) by  doxygen 1.4.6