Changeset c739102 in mainline for kernel/genarch/src/mm/page_pt.c
- Timestamp:
- 2012-11-21T23:26:22Z (12 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 0f2c80a
- Parents:
- bebf97d (diff), 1f7753a (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
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- 1 edited
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kernel/genarch/src/mm/page_pt.c
rbebf97d rc739102 89 89 PAGE_NOT_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | 90 90 PAGE_WRITE); 91 /* 92 * Make sure that a concurrent hardware page table walk or 93 * pt_mapping_find() will see the new PTL1 only after it is 94 * fully initialized. 95 */ 91 96 write_barrier(); 92 97 SET_PTL1_PRESENT(ptl0, PTL0_INDEX(page)); … … 103 108 PAGE_NOT_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | 104 109 PAGE_WRITE); 110 /* 111 * Make the new PTL2 visible only after it is fully initialized. 112 */ 105 113 write_barrier(); 106 114 SET_PTL2_PRESENT(ptl1, PTL1_INDEX(page)); … … 117 125 PAGE_NOT_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | 118 126 PAGE_WRITE); 127 /* 128 * Make the new PTL3 visible only after it is fully initialized. 129 */ 119 130 write_barrier(); 120 131 SET_PTL3_PRESENT(ptl2, PTL2_INDEX(page)); … … 125 136 SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); 126 137 SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags | PAGE_NOT_PRESENT); 138 /* 139 * Make the new mapping visible only after it is fully initialized. 140 */ 127 141 write_barrier(); 128 142 SET_FRAME_PRESENT(ptl3, PTL3_INDEX(page)); … … 296 310 297 311 #if (PTL1_ENTRIES != 0) 312 /* 313 * Always read ptl2 only after we are sure it is present. 314 */ 298 315 read_barrier(); 299 316 #endif … … 304 321 305 322 #if (PTL2_ENTRIES != 0) 323 /* 324 * Always read ptl3 only after we are sure it is present. 325 */ 306 326 read_barrier(); 307 327 #endif
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