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/*
* Copyright (C) 2006 Jakub Vana
* 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 ia64mm 
 * @{
 */
/** @file
*/
                                                    

#include <arch/mm/vhpt.h>
#include <mm/frame.h>
#include <print.h>


static vhpt_entry_t* vhpt_base;

uintptr_t vhpt_set_up(void)
{
    vhpt_base = frame_alloc(VHPT_WIDTH-FRAME_WIDTH,FRAME_KA | FRAME_ATOMIC);
    if(!vhpt_base) 
        panic("Kernel configured with VHPT but no memory for table.");
    vhpt_invalidate_all();
    return (uintptr_t) vhpt_base;
}


void vhpt_mapping_insert(uintptr_t va, asid_t asid, tlb_entry_t entry)
{
    region_register rr_save, rr;
    index_t vrn;
    rid_t rid;
    uint64_t tag;

    vhpt_entry_t *ventry;


    vrn = va >> VRN_SHIFT;
    rid = ASID2RID(asid, vrn);
                                                                                                                
  rr_save.word = rr_read(vrn);
  rr.word = rr_save.word;
  rr.map.rid = rid;
  rr_write(vrn, rr.word);
  srlz_i();
    
    ventry = (vhpt_entry_t *) thash(va);
  tag = ttag(va);
  rr_write(vrn, rr_save.word);
  srlz_i();
  srlz_d();

    ventry->word[0]=entry.word[0];
    ventry->word[1]=entry.word[1];
    ventry->present.tag.tag_word = tag;
    

}

void vhpt_invalidate_all()
{
    memsetb((uintptr_t)vhpt_base,1<<VHPT_WIDTH,0);
}

void vhpt_invalidate_asid(asid_t asid)
{
    vhpt_invalidate_all();
}



 /** @}
 */