Changeset 69146b93 in mainline for kernel/generic/src/mm
- Timestamp:
- 2012-11-26T19:02:45Z (13 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 04552324
- Parents:
- 5d230a30 (diff), 7462674 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the(diff)
links above to see all the changes relative to each parent. - Location:
- kernel/generic/src/mm
- Files:
-
- 5 edited
Legend:
- Unmodified
- Added
- Removed
-
kernel/generic/src/mm/as.c
r5d230a30 r69146b93 79 79 #include <syscall/copy.h> 80 80 #include <arch/interrupt.h> 81 #include <interrupt.h> 81 82 82 83 /** … … 426 427 /* 427 428 * So far, the area does not conflict with other areas. 428 * Check if it doesn't conflict with kerneladdress space.429 * Check if it is contained in the user address space. 429 430 */ 430 431 if (!KERNEL_ADDRESS_SPACE_SHADOWED) { 431 return !overlaps(addr, P2SZ(count), KERNEL_ADDRESS_SPACE_START, 432 KERNEL_ADDRESS_SPACE_END - KERNEL_ADDRESS_SPACE_START); 432 return iswithin(USER_ADDRESS_SPACE_START, 433 (USER_ADDRESS_SPACE_END - USER_ADDRESS_SPACE_START) + 1, 434 addr, P2SZ(count)); 433 435 } 434 436 … … 696 698 return ENOENT; 697 699 } 698 699 if (area->backend == &phys_backend) { 700 /* 701 * Remapping of address space areas associated 702 * with memory mapped devices is not supported. 700 701 if (!area->backend->is_resizable(area)) { 702 /* 703 * The backend does not support resizing for this area. 703 704 */ 704 705 mutex_unlock(&area->lock); … … 1057 1058 } 1058 1059 1059 if ((!src_area->backend) || (!src_area->backend->share)) { 1060 /* 1061 * There is no backend or the backend does not 1062 * know how to share the area. 1060 if (!src_area->backend->is_shareable(src_area)) { 1061 /* 1062 * The backend does not permit sharing of this area. 1063 1063 */ 1064 1064 mutex_unlock(&src_area->lock); … … 1363 1363 int as_page_fault(uintptr_t page, pf_access_t access, istate_t *istate) 1364 1364 { 1365 int rc = AS_PF_FAULT; 1366 1365 1367 if (!THREAD) 1366 return AS_PF_FAULT;1368 goto page_fault; 1367 1369 1368 1370 if (!AS) 1369 return AS_PF_FAULT;1371 goto page_fault; 1370 1372 1371 1373 mutex_lock(&AS->lock); … … 1423 1425 * Resort to the backend page fault handler. 1424 1426 */ 1425 if (area->backend->page_fault(area, page, access) != AS_PF_OK) { 1427 rc = area->backend->page_fault(area, page, access); 1428 if (rc != AS_PF_OK) { 1426 1429 page_table_unlock(AS, false); 1427 1430 mutex_unlock(&area->lock); … … 1444 1447 istate_set_retaddr(istate, 1445 1448 (uintptr_t) &memcpy_to_uspace_failover_address); 1449 } else if (rc == AS_PF_SILENT) { 1450 printf("Killing task %" PRIu64 " due to a " 1451 "failed late reservation request.\n", TASK->taskid); 1452 task_kill_self(true); 1446 1453 } else { 1447 return AS_PF_FAULT; 1454 fault_if_from_uspace(istate, "Page fault: %p.", (void *) page); 1455 panic_memtrap(istate, access, page, NULL); 1448 1456 } 1449 1457 … … 2132 2140 { 2133 2141 uintptr_t virt = base; 2134 as_area_t *area = as_area_create(AS, flags | AS_AREA_CACHEABLE, size,2142 as_area_t *area = as_area_create(AS, flags, size, 2135 2143 AS_AREA_ATTR_NONE, &anon_backend, NULL, &virt, bound); 2136 2144 if (area == NULL) -
kernel/generic/src/mm/backend_anon.c
r5d230a30 r69146b93 59 59 static void anon_destroy(as_area_t *); 60 60 61 static bool anon_is_resizable(as_area_t *); 62 static bool anon_is_shareable(as_area_t *); 63 61 64 static int anon_page_fault(as_area_t *, uintptr_t, pf_access_t); 62 65 static void anon_frame_free(as_area_t *, uintptr_t, uintptr_t); … … 68 71 .destroy = anon_destroy, 69 72 73 .is_resizable = anon_is_resizable, 74 .is_shareable = anon_is_shareable, 75 70 76 .page_fault = anon_page_fault, 71 77 .frame_free = anon_frame_free, … … 74 80 bool anon_create(as_area_t *area) 75 81 { 82 if (area->flags & AS_AREA_LATE_RESERVE) 83 return true; 84 76 85 return reserve_try_alloc(area->pages); 77 86 } … … 79 88 bool anon_resize(as_area_t *area, size_t new_pages) 80 89 { 90 if (area->flags & AS_AREA_LATE_RESERVE) 91 return true; 92 81 93 if (new_pages > area->pages) 82 94 return reserve_try_alloc(new_pages - area->pages); … … 100 112 ASSERT(mutex_locked(&area->as->lock)); 101 113 ASSERT(mutex_locked(&area->lock)); 114 ASSERT(!(area->flags & AS_AREA_LATE_RESERVE)); 102 115 103 116 /* … … 139 152 void anon_destroy(as_area_t *area) 140 153 { 154 if (area->flags & AS_AREA_LATE_RESERVE) 155 return; 156 141 157 reserve_free(area->pages); 142 158 } 143 159 160 bool anon_is_resizable(as_area_t *area) 161 { 162 return true; 163 } 164 165 bool anon_is_shareable(as_area_t *area) 166 { 167 return !(area->flags & AS_AREA_LATE_RESERVE); 168 } 144 169 145 170 /** Service a page fault in the anonymous memory address space area. … … 225 250 * the different causes 226 251 */ 252 253 if (area->flags & AS_AREA_LATE_RESERVE) { 254 /* 255 * Reserve the memory for this page now. 256 */ 257 if (!reserve_try_alloc(1)) 258 return AS_PF_SILENT; 259 } 260 227 261 kpage = km_temporary_page_get(&frame, FRAME_NO_RESERVE); 228 262 memsetb((void *) kpage, PAGE_SIZE, 0); … … 255 289 ASSERT(mutex_locked(&area->lock)); 256 290 257 frame_free_noreserve(frame); 291 if (area->flags & AS_AREA_LATE_RESERVE) { 292 /* 293 * In case of the late reserve areas, physical memory will not 294 * be unreserved when the area is destroyed so we need to use 295 * the normal unreserving frame_free(). 296 */ 297 frame_free(frame); 298 } else { 299 /* 300 * The reserve will be given back when the area is destroyed or 301 * resized, so use the frame_free_noreserve() which does not 302 * manipulate the reserve or it would be given back twice. 303 */ 304 frame_free_noreserve(frame); 305 } 258 306 } 259 307 -
kernel/generic/src/mm/backend_elf.c
r5d230a30 r69146b93 58 58 static void elf_destroy(as_area_t *); 59 59 60 static bool elf_is_resizable(as_area_t *); 61 static bool elf_is_shareable(as_area_t *); 62 60 63 static int elf_page_fault(as_area_t *, uintptr_t, pf_access_t); 61 64 static void elf_frame_free(as_area_t *, uintptr_t, uintptr_t); … … 66 69 .share = elf_share, 67 70 .destroy = elf_destroy, 71 72 .is_resizable = elf_is_resizable, 73 .is_shareable = elf_is_shareable, 68 74 69 75 .page_fault = elf_page_fault, … … 213 219 } 214 220 221 bool elf_is_resizable(as_area_t *area) 222 { 223 return true; 224 } 225 226 bool elf_is_shareable(as_area_t *area) 227 { 228 return true; 229 } 230 231 215 232 /** Service a page fault in the ELF backend address space area. 216 233 * -
kernel/generic/src/mm/backend_phys.c
r5d230a30 r69146b93 52 52 static void phys_destroy(as_area_t *); 53 53 54 static bool phys_is_resizable(as_area_t *); 55 static bool phys_is_shareable(as_area_t *); 56 57 54 58 static int phys_page_fault(as_area_t *, uintptr_t, pf_access_t); 55 59 … … 59 63 .share = phys_share, 60 64 .destroy = phys_destroy, 65 66 .is_resizable = phys_is_resizable, 67 .is_shareable = phys_is_shareable, 61 68 62 69 .page_fault = phys_page_fault, … … 87 94 /* Nothing to do. */ 88 95 } 96 97 bool phys_is_resizable(as_area_t *area) 98 { 99 return false; 100 } 101 102 bool phys_is_shareable(as_area_t *area) 103 { 104 return true; 105 } 106 89 107 90 108 /** Service a page fault in the address space area backed by physical memory. -
kernel/generic/src/mm/km.c
r5d230a30 r69146b93 234 234 * @param[inout] framep Pointer to a variable which will receive the physical 235 235 * address of the allocated frame. 236 * @param[in] flags Frame allocation flags. FRAME_NONE or FRAME_NO_RESERVE. 236 * @param[in] flags Frame allocation flags. FRAME_NONE, FRAME_NO_RESERVE 237 * and FRAME_ATOMIC bits are allowed. 237 238 * @return Virtual address of the allocated frame. 238 239 */ … … 244 245 ASSERT(THREAD); 245 246 ASSERT(framep); 246 ASSERT(!(flags & ~ FRAME_NO_RESERVE));247 ASSERT(!(flags & ~(FRAME_NO_RESERVE | FRAME_ATOMIC))); 247 248 248 249 /* … … 256 257 ASSERT(page); // FIXME 257 258 } else { 258 frame = (uintptr_t) frame_alloc_noreserve(ONE_FRAME, 259 FRAME_LOWMEM); 259 frame = (uintptr_t) frame_alloc(ONE_FRAME, 260 FRAME_LOWMEM | flags); 261 if (!frame) 262 return (uintptr_t) NULL; 260 263 page = PA2KA(frame); 261 264 }
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