frame.c

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/*
 * Copyright (C) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <arch/boot/boot.h>
#include <arch/mm/frame.h>
#include <arch/mm/memory_init.h>
#include <mm/frame.h>
#include <align.h>
#include <macros.h>

__address last_frame = 0;

void frame_arch_init(void)
{
        pfn_t minconf = 2;
        count_t i;
        pfn_t start, conf;
        size_t size;
        
        for (i = 0; i < bootinfo.memmap.count; i++) {
                start = ADDR2PFN(ALIGN_UP(bootinfo.memmap.zones[i].start, FRAME_SIZE));
                size = SIZE2FRAMES(ALIGN_DOWN(bootinfo.memmap.zones[i].size, FRAME_SIZE));
                
                if ((minconf < start) || (minconf >= start + size))
                        conf = start;
                else
                        conf = minconf;
                
                zone_create(start, size, conf, 0);
                if (last_frame < ALIGN_UP(bootinfo.memmap.zones[i].start + bootinfo.memmap.zones[i].size, FRAME_SIZE))
                        last_frame = ALIGN_UP(bootinfo.memmap.zones[i].start + bootinfo.memmap.zones[i].size, FRAME_SIZE);
        }

        /* First is exception vector, second is 'implementation specific',
           third and fourth is reserved, other contain real mode code */
        frame_mark_unavailable(0, 8);
        
        /* Mark the Page Hash Table frames as unavailable */
        __u32 sdr1;
        asm volatile (
                "mfsdr1 %0\n"
                : "=r" (sdr1)
        );
        frame_mark_unavailable(ADDR2PFN(sdr1 & 0xffff000), 16); // FIXME
}

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