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1290 vana 1
/*
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* Copyright (c) 2006 Jakub Vana
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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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/** @addtogroup ia64mm 
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 * @{
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 */
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/** @file
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*/
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#include <memstr.h>
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#include <arch/mm/vhpt.h>
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#include <mm/frame.h>
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#include <print.h>
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static vhpt_entry_t* vhpt_base;
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uintptr_t vhpt_set_up(void)
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{
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    vhpt_base = frame_alloc(VHPT_WIDTH - FRAME_WIDTH,
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        FRAME_KA | FRAME_ATOMIC);
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    if (!vhpt_base)
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        panic("Kernel configured with VHPT but no memory for table.");
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    vhpt_invalidate_all();
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    return (uintptr_t) vhpt_base;
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}
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void vhpt_mapping_insert(uintptr_t va, asid_t asid, tlb_entry_t entry)
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{
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    region_register rr_save, rr;
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    size_t vrn;
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    rid_t rid;
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    uint64_t tag;
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    vhpt_entry_t *ventry;
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    vrn = va >> VRN_SHIFT;
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    rid = ASID2RID(asid, vrn);
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    rr_save.word = rr_read(vrn);
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    rr.word = rr_save.word;
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    rr.map.rid = rid;
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    rr_write(vrn, rr.word);
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    srlz_i();
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    ventry = (vhpt_entry_t *) thash(va);
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    tag = ttag(va);
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    rr_write(vrn, rr_save.word);
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    srlz_i();
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    srlz_d();
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    ventry->word[0] = entry.word[0];
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    ventry->word[1] = entry.word[1];
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    ventry->present.tag.tag_word = tag;
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}
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void vhpt_invalidate_all()
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{
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    memsetb(vhpt_base, 1 << VHPT_WIDTH, 0);
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}
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void vhpt_invalidate_asid(asid_t asid)
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{
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    vhpt_invalidate_all();
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}
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/** @}
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 */