0,0 → 1,88 |
/* |
* 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. |
*/ |
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#include <arch/mm/vhpt.h> |
#include <mm/frame.h> |
#include <print.h> |
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static vhpt_entry_t* vhpt_base; |
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__address vhpt_set_up(void) |
{ |
vhpt_base=(vhpt_entry_t*) PA2KA(PFN2ADDR(frame_alloc(VHPT_WIDTH-FRAME_WIDTH,FRAME_KA))); |
if(!vhpt_base) panic("Kernel configured with VHPT but no memory for table."); |
vhpt_invalidate_all(); |
return (__address) vhpt_base; |
} |
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void vhpt_mapping_insert(__address va, asid_t asid, tlb_entry_t entry) |
{ |
region_register rr_save, rr; |
index_t vrn; |
rid_t rid; |
__u64 tag; |
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vhpt_entry_t *ventry; |
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vrn = va >> VRN_SHIFT; |
rid = ASID2RID(asid, vrn); |
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rr_save.word = rr_read(vrn); |
rr.word = rr_save.word; |
rr.map.rid = rid; |
rr_write(vrn, rr.word); |
srlz_i(); |
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ventry = (vhpt_entry_t *) thash(va); |
tag = ttag(va); |
rr_write(vrn, rr_save.word); |
srlz_i(); |
srlz_d(); |
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ventry->word[0]=entry.word[0]; |
ventry->word[1]=entry.word[1]; |
ventry->present.tag.tag_word = tag; |
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} |
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void vhpt_invalidate_all() |
{ |
memsetb((__address)vhpt_base,1<<VHPT_WIDTH,0); |
} |
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void vhpt_invalidate_asid(asid_t asid) |
{ |
vhpt_invalidate_all(); |
} |
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