Subversion Repositories HelenOS-historic

/*
 * Copyright (C) 2005 Jakub Jermar
 * 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.
 */

 /** @addtogroup sparc64mm  
 * @{
 */
/** @file
 */

#include <arch/mm/page.h>
#include <arch/mm/tlb.h>
#include <genarch/mm/page_ht.h>
#include <mm/frame.h>
#include <bitops.h>
#include <debug.h>

void page_arch_init(void)
{
    page_mapping_operations = &ht_mapping_operations;
}

__address hw_map(__address physaddr, size_t size)
{
    unsigned int order;
    int i;

    struct {
        int pagesize;
        size_t increment;
        count_t count;
    } sizemap[] = {
        { PAGESIZE_8K, 0, 1 },          /* 8K */
        { PAGESIZE_8K, PAGE_SIZE, 2 },      /* 16K */
        { PAGESIZE_8K, PAGE_SIZE, 4 },      /* 32K */
        { PAGESIZE_64K, 0, 1},          /* 64K */
        { PAGESIZE_64K, 8*PAGE_SIZE, 2 },   /* 128K */
        { PAGESIZE_64K, 8*PAGE_SIZE, 4 },   /* 256K */
        { PAGESIZE_512K, 0, 1 },        /* 512K */
        { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */
        { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */
        { PAGESIZE_4M, 0, 1 }           /* 4M */
    };
    
    ASSERT(size <= 4*1024*1024);
    
    if (size <= FRAME_SIZE)
        order = 0;
    else
        order = (fnzb32(size - 1) + 1) - FRAME_WIDTH;
    
    __address virtaddr = PA2KA(PFN2ADDR(frame_alloc(order, FRAME_KA)));

    for (i = 0; i < sizemap[order].count; i++)
        dtlb_insert_mapping(virtaddr + i*sizemap[order].increment,
                    physaddr + i*sizemap[order].increment,
                    sizemap[order].pagesize, true, false);
    
    return virtaddr;
}

 /** @}
 */