paging/pae/X86VMTranslationMapPAE.cpp

244 	// cycle through and free all of the user space page tables
258 				vm_page* page = vm_lookup_page(address / B_PAGE_SIZE);
259 				if (page == NULL)
261 						"didn't find page table page: page address: %#"
265 				DEBUG_PAGE_ACCESS_START(page);
266 				vm_page_set_state(page, PAGE_STATE_FREE);
290 		// get the physical page mapper
299 		// allocate a physical page mapper
307 		// lot, since it allows us to just use the upper two page directories
308 		// of the kernel and create two new lower page directories for the
312 		// allocate the page directories (both at once)
321 		// clear the userland page directories
324 		// use the upper two kernel page directories
330 		// look up the page directories' physical addresses
384 	// check to see if a page table exists for this range
389 		// we need to allocate a page table
390 		vm_page *page = vm_page_allocate_page(reservation,
393 		DEBUG_PAGE_ACCESS_END(page);
396 			= (phys_addr_t)page->physical_page_number * B_PAGE_SIZE;
398 		TRACE("X86VMTranslationMapPAE::Map(): asked for free page for "
399 			"page table: %#" B_PRIxPHYSADDR "\n", physicalPageTable);
401 		// put it in the page dir
411 	// now, fill in the page table entry
456 			// no page table here, move the start up to access the next page
473 				// page mapping not valid
477 			TRACE("X86VMTranslationMapPAE::Unmap(): removing page %#"
514 			// no page table here, move the start up to access the next page
559 /*!	Caller must have locked the cache of the page to be unmapped.
593 		// page mapping not valid
607 		// NOTE: Between clearing the page table entry and Flush() other
609 		// same team) could still access the page in question via their cached
611 		// effect that the page looks unmodified (and might thus be recycled),
652 			// no page table here, move the start up to access the next page
685 				// get the page
686 				vm_page* page = vm_lookup_page(
688 				ASSERT(page != NULL);
690 				DEBUG_PAGE_ACCESS_START(page);
692 				// transfer the accessed/dirty flags to the page
694 					page->accessed = true;
696 					page->modified = true;
699 				// page
703 						= page->mappings.GetIterator();
712 					page->mappings.Remove(mapping);
715 					page->DecrementWiredCount();
717 				if (!page->IsMapped()) {
721 						if (page->Cache()->temporary)
722 							vm_page_set_state(page, PAGE_STATE_INACTIVE);
723 						else if (page->modified)
724 							vm_page_set_state(page, PAGE_STATE_MODIFIED);
726 							vm_page_set_state(page, PAGE_STATE_CACHED);
730 				DEBUG_PAGE_ACCESS_END(page);
738 	// TODO: As in UnmapPage() we can lose page dirty flags here. ATM it's not
773 		vm_page* page = mapping->page;
774 		page->mappings.Remove(mapping);
776 		VMCache* cache = page->Cache();
779 		if (!page->IsMapped()) {
786 				+ ((page->cache_offset * B_PAGE_SIZE) - area->cache_offset);
792 				panic("page %p has mapping for area %p (%#" B_PRIxADDR "), but "
793 					"has no page dir entry", page, area, address);
810 				panic("page %p has mapping for area %p (%#" B_PRIxADDR "), but "
811 					"has no page table entry", page, area, address);
817 			// transfer the accessed/dirty flags to the page and invalidate
820 				page->accessed = true;
827 				page->modified = true;
830 				DEBUG_PAGE_ACCESS_START(page);
833 					vm_page_set_state(page, PAGE_STATE_INACTIVE);
834 				else if (page->modified)
835 					vm_page_set_state(page, PAGE_STATE_MODIFIED);
837 					vm_page_set_state(page, PAGE_STATE_CACHED);
839 				DEBUG_PAGE_ACCESS_END(page);
844 				+ ((page->cache_offset * B_PAGE_SIZE) - area->cache_offset);
890 	// get the page directory entry
899 	// get the page table entry
913 	// translate the page state flags
943 	// get the page directory entry
952 	// get the page table entry
962 	// translate the page state flags
1014 			// no page table here, move the start up to access the next page
1032 				// page mapping not valid
1036 			TRACE("X86VMTranslationMapPAE::Protect(): protect page %#"
1141 				// page mapping not valid
1146 				// page was accessed -- just clear the flags
1154 			// page hasn't been accessed -- unmap it
1204 	// get the page directory
1208 	kprintf("page directory: %p (PDPT[%zu])\n", pageDirectory,
1211 	// get the page directory entry
1214 	kprintf("page directory entry %zu (%p): %#" B_PRIx64 "\n",
1243 	// get the page table entry
1248 	kprintf("page table: %#" B_PRIx64 "\n",
1252 	kprintf("page table entry %zu (phys: %#" B_PRIx64 "): %#" B_PRIx64 "\n",
1300 		// iterate through the page directory
1308 			// get and iterate through the page table