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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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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 | #include <mm/vm.h> |
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30 | #include <mm/page.h> |
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31 | #include <mm/frame.h> |
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5 | jermar | 32 | #include <mm/tlb.h> |
35 | jermar | 33 | #include <mm/heap.h> |
1 | jermar | 34 | #include <arch/mm/page.h> |
684 | jermar | 35 | #include <genarch/mm/page_pt.h> |
391 | jermar | 36 | #include <arch/mm/asid.h> |
37 | #include <arch/mm/vm.h> |
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1 | jermar | 38 | #include <arch/types.h> |
39 | #include <typedefs.h> |
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40 | #include <synch/spinlock.h> |
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41 | #include <config.h> |
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42 | #include <list.h> |
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43 | #include <panic.h> |
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115 | jermar | 44 | #include <arch/asm.h> |
167 | jermar | 45 | #include <debug.h> |
195 | vana | 46 | #include <memstr.h> |
47 | #include <arch.h> |
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1 | jermar | 48 | |
167 | jermar | 49 | #define KAS_START_INDEX PTL0_INDEX(KERNEL_ADDRESS_SPACE_START) |
50 | #define KAS_END_INDEX PTL0_INDEX(KERNEL_ADDRESS_SPACE_END) |
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51 | #define KAS_INDICES (1+(KAS_END_INDEX-KAS_START_INDEX)) |
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52 | |||
53 | vm_t *vm_create(pte_t *ptl0) |
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1 | jermar | 54 | { |
55 | vm_t *m; |
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168 | jermar | 56 | |
1 | jermar | 57 | m = (vm_t *) malloc(sizeof(vm_t)); |
58 | if (m) { |
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552 | palkovsky | 59 | spinlock_initialize(&m->lock, "vm_lock"); |
1 | jermar | 60 | list_initialize(&m->vm_area_head); |
167 | jermar | 61 | |
391 | jermar | 62 | m->asid = asid_get(); |
63 | |||
167 | jermar | 64 | /* |
65 | * Each vm_t is supposed to have its own page table. |
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66 | * It is either passed one or it has to allocate and set one up. |
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67 | */ |
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168 | jermar | 68 | m->ptl0 = ptl0; |
69 | if (!m->ptl0) { |
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167 | jermar | 70 | pte_t *src_ptl0, *dst_ptl0; |
71 | |||
168 | jermar | 72 | src_ptl0 = (pte_t *) PA2KA((__address) GET_PTL0_ADDRESS()); |
689 | bondari | 73 | dst_ptl0 = (pte_t *) frame_alloc(FRAME_KA | FRAME_PANIC, ONE_FRAME, NULL); |
227 | jermar | 74 | |
236 | jermar | 75 | // memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
76 | // memcpy((void *) &dst_ptl0[KAS_START_INDEX], (void *) &src_ptl0[KAS_START_INDEX], KAS_INDICES); |
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77 | |||
257 | palkovsky | 78 | memcpy((void *) dst_ptl0,(void *) src_ptl0, PAGE_SIZE); |
227 | jermar | 79 | |
168 | jermar | 80 | m->ptl0 = (pte_t *) KA2PA((__address) dst_ptl0); |
167 | jermar | 81 | } |
1 | jermar | 82 | } |
168 | jermar | 83 | |
1 | jermar | 84 | return m; |
85 | } |
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86 | |||
87 | void vm_destroy(vm_t *m) |
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88 | { |
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89 | } |
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90 | |||
72 | decky | 91 | vm_area_t *vm_area_create(vm_t *m, vm_type_t type, size_t size, __address addr) |
1 | jermar | 92 | { |
413 | jermar | 93 | ipl_t ipl; |
1 | jermar | 94 | vm_area_t *a; |
95 | |||
96 | if (addr % PAGE_SIZE) |
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68 | decky | 97 | panic("addr not aligned to a page boundary"); |
1 | jermar | 98 | |
413 | jermar | 99 | ipl = interrupts_disable(); |
1 | jermar | 100 | spinlock_lock(&m->lock); |
101 | |||
102 | /* |
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103 | * TODO: test vm_area which is to be created doesn't overlap with an existing one. |
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104 | */ |
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105 | |||
106 | a = (vm_area_t *) malloc(sizeof(vm_area_t)); |
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107 | if (a) { |
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108 | int i; |
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109 | |||
110 | a->mapping = (__address *) malloc(size * sizeof(__address)); |
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111 | if (!a->mapping) { |
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112 | free(a); |
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113 | spinlock_unlock(&m->lock); |
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413 | jermar | 114 | interrupts_restore(ipl); |
1 | jermar | 115 | return NULL; |
116 | } |
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117 | |||
118 | for (i=0; i<size; i++) |
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689 | bondari | 119 | a->mapping[i] = frame_alloc(0, ONE_FRAME, NULL); |
1 | jermar | 120 | |
552 | palkovsky | 121 | spinlock_initialize(&a->lock, "vm_area_lock"); |
1 | jermar | 122 | |
123 | link_initialize(&a->link); |
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124 | a->type = type; |
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125 | a->size = size; |
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126 | a->address = addr; |
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127 | |||
128 | list_append(&a->link, &m->vm_area_head); |
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129 | |||
130 | } |
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131 | |||
132 | spinlock_unlock(&m->lock); |
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413 | jermar | 133 | interrupts_restore(ipl); |
1 | jermar | 134 | |
135 | return a; |
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136 | } |
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137 | |||
138 | void vm_area_destroy(vm_area_t *a) |
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139 | { |
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140 | } |
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141 | |||
167 | jermar | 142 | void vm_area_map(vm_area_t *a, vm_t *m) |
1 | jermar | 143 | { |
144 | int i, flags; |
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413 | jermar | 145 | ipl_t ipl; |
1 | jermar | 146 | |
413 | jermar | 147 | ipl = interrupts_disable(); |
167 | jermar | 148 | spinlock_lock(&m->lock); |
1 | jermar | 149 | spinlock_lock(&a->lock); |
150 | |||
151 | switch (a->type) { |
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152 | case VMA_TEXT: |
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153 | flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
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154 | break; |
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155 | case VMA_DATA: |
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156 | case VMA_STACK: |
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157 | flags = PAGE_READ | PAGE_WRITE | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
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158 | break; |
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159 | default: |
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167 | jermar | 160 | panic("unexpected vm_type_t %d", a->type); |
1 | jermar | 161 | } |
167 | jermar | 162 | |
163 | ASSERT(m->ptl0); |
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1 | jermar | 164 | for (i=0; i<a->size; i++) |
687 | jermar | 165 | page_mapping_insert(a->address + i*PAGE_SIZE, m->asid, a->mapping[i], flags, (__address) m->ptl0); |
1 | jermar | 166 | |
167 | spinlock_unlock(&a->lock); |
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167 | jermar | 168 | spinlock_unlock(&m->lock); |
413 | jermar | 169 | interrupts_restore(ipl); |
1 | jermar | 170 | } |
171 | |||
167 | jermar | 172 | void vm_area_unmap(vm_area_t *a, vm_t *m) |
1 | jermar | 173 | { |
174 | int i; |
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413 | jermar | 175 | ipl_t ipl; |
1 | jermar | 176 | |
413 | jermar | 177 | ipl = interrupts_disable(); |
167 | jermar | 178 | spinlock_lock(&m->lock); |
1 | jermar | 179 | spinlock_lock(&a->lock); |
180 | |||
167 | jermar | 181 | ASSERT(m->ptl0); |
1 | jermar | 182 | for (i=0; i<a->size; i++) |
687 | jermar | 183 | page_mapping_insert(a->address + i*PAGE_SIZE, 0, 0, PAGE_NOT_PRESENT, (__address) m->ptl0); |
5 | jermar | 184 | |
1 | jermar | 185 | spinlock_unlock(&a->lock); |
167 | jermar | 186 | spinlock_unlock(&m->lock); |
413 | jermar | 187 | interrupts_restore(ipl); |
1 | jermar | 188 | } |
189 | |||
190 | void vm_install(vm_t *m) |
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191 | { |
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413 | jermar | 192 | ipl_t ipl; |
1 | jermar | 193 | |
413 | jermar | 194 | ipl = interrupts_disable(); |
1 | jermar | 195 | |
6 | jermar | 196 | tlb_shootdown_start(); |
1 | jermar | 197 | spinlock_lock(&m->lock); |
198 | |||
167 | jermar | 199 | ASSERT(m->ptl0); |
200 | SET_PTL0_ADDRESS(m->ptl0); |
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1 | jermar | 201 | |
202 | spinlock_unlock(&m->lock); |
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6 | jermar | 203 | tlb_shootdown_finalize(); |
5 | jermar | 204 | |
413 | jermar | 205 | interrupts_restore(ipl); |
391 | jermar | 206 | |
207 | vm_install_arch(m); |
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208 | |||
209 | VM = m; |
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1 | jermar | 210 | } |