| 1 | /*
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| 2 | * Copyright (c) 2006 Jakub Vana
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup kernel_ia64_mm
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #include <memw.h>
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| 36 | #include <arch/barrier.h>
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| 37 | #include <arch/mm/vhpt.h>
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| 38 | #include <mm/frame.h>
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| 39 |
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| 40 | static vhpt_entry_t *vhpt_base;
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| 41 |
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| 42 | uintptr_t vhpt_set_up(void)
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| 43 | {
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| 44 | uintptr_t vhpt_frame =
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| 45 | frame_alloc(SIZE2FRAMES(VHPT_SIZE), FRAME_LOWMEM | FRAME_ATOMIC, 0);
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| 46 | if (!vhpt_frame)
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| 47 | panic("Kernel configured with VHPT but no memory for table.");
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| 48 |
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| 49 | vhpt_base = (vhpt_entry_t *) PA2KA(vhpt_frame);
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| 50 | vhpt_invalidate_all();
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| 51 | return (uintptr_t) vhpt_base;
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| 52 | }
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| 53 |
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| 54 | void vhpt_mapping_insert(uintptr_t va, asid_t asid, tlb_entry_t entry)
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| 55 | {
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| 56 | region_register_t rr_save, rr;
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| 57 | size_t vrn;
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| 58 | rid_t rid;
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| 59 | uint64_t tag;
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| 60 |
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| 61 | vhpt_entry_t *ventry;
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| 62 |
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| 63 | vrn = va >> VRN_SHIFT;
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| 64 | rid = ASID2RID(asid, vrn);
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| 65 |
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| 66 | rr_save.word = rr_read(vrn);
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| 67 | rr.word = rr_save.word;
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| 68 | rr.map.rid = rid;
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| 69 | rr_write(vrn, rr.word);
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| 70 | srlz_i();
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| 71 |
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| 72 | ventry = (vhpt_entry_t *) thash(va);
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| 73 | tag = ttag(va);
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| 74 | rr_write(vrn, rr_save.word);
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| 75 | srlz_i();
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| 76 | srlz_d();
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| 77 |
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| 78 | ventry->word[0] = entry.word[0];
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| 79 | ventry->word[1] = entry.word[1];
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| 80 | ventry->present.tag.tag_word = tag;
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| 81 | }
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| 82 |
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| 83 | void vhpt_invalidate_all(void)
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| 84 | {
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| 85 | memsetb(vhpt_base, VHPT_SIZE, 0);
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| 86 | }
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| 87 |
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| 88 | void vhpt_invalidate_asid(asid_t asid)
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| 89 | {
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| 90 | vhpt_invalidate_all();
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| 91 | }
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| 92 |
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| 93 | /** @}
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| 94 | */
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