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1290 | vana | 1 | /* |
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 | |||
29 | |||
1210 | vana | 30 | #include <arch/mm/vhpt.h> |
31 | #include <mm/frame.h> |
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32 | #include <print.h> |
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33 | |||
34 | |||
35 | static vhpt_entry_t* vhpt_base; |
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36 | |||
37 | __address vhpt_set_up(void) |
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38 | { |
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39 | vhpt_base=(vhpt_entry_t*) PA2KA(PFN2ADDR(frame_alloc(VHPT_WIDTH-FRAME_WIDTH,FRAME_KA))); |
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40 | if(!vhpt_base) panic("Kernel configured with VHPT but no memory for table."); |
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41 | vhpt_invalidate_all(); |
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42 | return (__address) vhpt_base; |
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43 | } |
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44 | |||
45 | |||
46 | void vhpt_mapping_insert(__address va, asid_t asid, tlb_entry_t entry) |
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47 | { |
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48 | region_register rr_save, rr; |
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49 | index_t vrn; |
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50 | rid_t rid; |
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51 | __u64 tag; |
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52 | |||
53 | vhpt_entry_t *ventry; |
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54 | |||
55 | |||
56 | vrn = va >> VRN_SHIFT; |
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57 | rid = ASID2RID(asid, vrn); |
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58 | |||
59 | rr_save.word = rr_read(vrn); |
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60 | rr.word = rr_save.word; |
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61 | rr.map.rid = rid; |
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62 | rr_write(vrn, rr.word); |
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63 | srlz_i(); |
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64 | |||
65 | ventry = (vhpt_entry_t *) thash(va); |
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66 | tag = ttag(va); |
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67 | rr_write(vrn, rr_save.word); |
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68 | srlz_i(); |
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69 | srlz_d(); |
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70 | |||
71 | ventry->word[0]=entry.word[0]; |
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72 | ventry->word[1]=entry.word[1]; |
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73 | ventry->present.tag.tag_word = tag; |
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74 | |||
75 | |||
76 | } |
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77 | |||
78 | void vhpt_invalidate_all() |
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79 | { |
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80 | memsetb((__address)vhpt_base,1<<VHPT_WIDTH,0); |
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81 | } |
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82 | |||
83 | void vhpt_invalidate_asid(asid_t asid) |
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84 | { |
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85 | vhpt_invalidate_all(); |
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86 | } |
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87 | |||
88 |