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* Copyright (c) 2006 Jakub Vana
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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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* - 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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* 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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/** @addtogroup ia64mm
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#include <arch/mm/vhpt.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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vhpt_base = frame_alloc(VHPT_WIDTH - FRAME_WIDTH,
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FRAME_KA | FRAME_ATOMIC);
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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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void vhpt_mapping_insert(uintptr_t va, asid_t asid, tlb_entry_t entry)
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region_register rr_save, rr;
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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_write(vrn, rr.word);
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ventry = (vhpt_entry_t *) thash(va);
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rr_write(vrn, rr_save.word);
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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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void vhpt_invalidate_all()
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memsetb(vhpt_base, 1 << VHPT_WIDTH, 0);
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void vhpt_invalidate_asid(asid_t asid)
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vhpt_invalidate_all();