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684 jermar 1
/*
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 * Copyright (C) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch/mm/page.h>
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#include <genarch/mm/page_ht.h>
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#include <mm/page.h>
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#include <config.h>
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#include <panic.h>
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715 vana 35
 
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static void set_VHPT_environment(void)
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{
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    /*
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    TODO:
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    */
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    int i;
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    /* First set up REGION REGISTER 0 */
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    region_register rr;
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    rr.map.ve=0;                  /*Disable Walker*/
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    rr.map.ps=PAGE_WIDTH;
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    rr.map.rid=REGION_RID_MAIN;
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    asm
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    (
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        "mov rr[r0]=%0;;"
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        :
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        :"r"(rr.word)
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    );
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    /* And Invalidate the rest of REGION REGISTERS */
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    for(i=1;i<REGION_REGISTERS;i++)
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    {
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        rr.map.rid=REGION_RID_FIRST_INVALID+i-1;
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        asm
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        (
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            "mov r8=%1;;"
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            "mov rr[r8]=%0;;"
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            :
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            :"r"(rr.word),"r"(i)
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            :"r8"
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        );
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    };
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    PTA_register pta;
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    pta.map.ve=0;                   /*Disable Walker*/
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    pta.map.vf=1;                   /*Large entry format*/
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    pta.map.size=VHPT_WIDTH;
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    pta.map.base=VHPT_BASE;
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    /*Write PTA*/
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    asm
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    (
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        "mov cr8=%0;;"
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        :
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        :"r"(pta.word)
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    ); 
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}  
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684 jermar 91
void page_arch_init(void)
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{
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    page_operations = &page_ht_operations;
715 vana 94
    set_VHPT_environment();
684 jermar 95
}