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Rev | Author | Line No. | Line |
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684 | jermar | 1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
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747 | jermar | 3 | * Copyright (C) 2006 Jakub Vana |
684 | jermar | 4 | * All rights reserved. |
5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions |
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8 | * are met: |
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9 | * |
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10 | * - Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * - Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * - The name of the author may not be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | #include <arch/mm/page.h> |
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747 | jermar | 31 | #include <genarch/mm/page_ht.h> |
32 | #include <mm/asid.h> |
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716 | vana | 33 | #include <arch/types.h> |
728 | vana | 34 | #include <print.h> |
684 | jermar | 35 | #include <mm/page.h> |
747 | jermar | 36 | #include <mm/frame.h> |
684 | jermar | 37 | #include <config.h> |
38 | #include <panic.h> |
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746 | jermar | 39 | #include <arch/asm.h> |
747 | jermar | 40 | #include <arch/barrier.h> |
748 | jermar | 41 | #include <memstr.h> |
684 | jermar | 42 | |
747 | jermar | 43 | /** Initialize VHPT and region registers. */ |
44 | static void set_vhpt_environment(void) |
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716 | vana | 45 | { |
747 | jermar | 46 | region_register rr; |
47 | pta_register pta; |
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48 | int i; |
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716 | vana | 49 | |
747 | jermar | 50 | /* |
51 | * First set up kernel region register. |
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52 | */ |
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53 | rr.word = rr_read(VRN_KERNEL); |
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54 | rr.map.ve = 0; /* disable VHPT walker */ |
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55 | rr.map.ps = PAGE_WIDTH; |
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56 | rr.map.rid = ASID_KERNEL; |
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57 | rr_write(VRN_KERNEL, rr.word); |
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58 | srlz_i(); |
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59 | srlz_d(); |
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716 | vana | 60 | |
747 | jermar | 61 | /* |
62 | * And invalidate the rest of region register. |
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63 | */ |
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64 | for(i = 0; i < REGION_REGISTERS; i++) { |
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65 | /* skip kernel rr */ |
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66 | if (i == VRN_KERNEL) |
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67 | continue; |
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728 | vana | 68 | |
747 | jermar | 69 | rr.word == rr_read(i); |
748 | jermar | 70 | rr.map.ve = 0; /* disable VHPT walker */ |
747 | jermar | 71 | rr.map.rid = ASID_INVALID; |
72 | rr_write(i, rr.word); |
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73 | srlz_i(); |
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74 | srlz_d(); |
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75 | } |
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726 | jermar | 76 | |
715 | vana | 77 | /* |
747 | jermar | 78 | * Allocate VHPT and invalidate all its entries. |
79 | */ |
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80 | page_ht = (pte_t *) frame_alloc(FRAME_KA, VHPT_WIDTH - FRAME_WIDTH, NULL); |
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748 | jermar | 81 | memsetb((__address) page_ht, VHPT_SIZE, 0); |
82 | ht_invalidate_all(); |
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715 | vana | 83 | |
747 | jermar | 84 | /* |
85 | * Set up PTA register. |
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86 | */ |
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87 | pta.word = pta_read(); |
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88 | pta.map.ve = 0; /* disable VHPT walker */ |
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89 | pta.map.vf = 1; /* large entry format */ |
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90 | pta.map.size = VHPT_WIDTH; |
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91 | pta.map.base = (__address) page_ht; |
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92 | pta_write(pta.word); |
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93 | srlz_i(); |
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94 | srlz_d(); |
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95 | } |
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728 | vana | 96 | |
747 | jermar | 97 | /** Initialize ia64 virtual address translation subsystem. */ |
684 | jermar | 98 | void page_arch_init(void) |
99 | { |
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100 | page_operations = &page_ht_operations; |
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746 | jermar | 101 | pk_disable(); |
747 | jermar | 102 | set_vhpt_environment(); |
684 | jermar | 103 | } |
748 | jermar | 104 | |
105 | /** Calculate address of collision chain from VPN and ASID. |
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106 | * |
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107 | * This is rather non-trivial function. |
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108 | * First, it has to translate ASID to RID. |
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109 | * This is achieved by taking VRN bits of |
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110 | * page into account. |
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111 | * Second, it must preserve the region register |
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112 | * it writes the RID to. |
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113 | * |
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114 | * @param page Address of virtual page including VRN bits. |
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115 | * @param asid Address space identifier. |
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116 | * |
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117 | * @return Head of VHPT collision chain for page and asid. |
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118 | */ |
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119 | pte_t *vhpt_hash(__address page, asid_t asid) |
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120 | { |
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121 | region_register rr_save, rr; |
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122 | pte_t *t; |
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123 | |||
124 | rr_save.word = rr_read(VRN_WORK); |
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125 | rr.word = rr_save.word; |
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126 | if ((page >> VRN_SHIFT) != VRN_KERNEL) |
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127 | rr.map.rid = (asid * RIDS_PER_ASID) + (page >> VRN_SHIFT); |
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128 | else |
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129 | rr.map.rid = ASID_KERNEL; |
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130 | rr_write(VRN_WORK, rr.word); |
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131 | srlz_i(); |
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132 | t = (pte_t *) thash((VRN_WORK << VRN_SHIFT) | (~(VRN_MASK) & page)); |
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133 | rr_write(VRN_WORK, rr_save.word); |
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134 | srlz_i(); |
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135 | srlz_d(); |
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136 | |||
137 | return t; |
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138 | } |