1 /* 2 * Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 * 5 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 6 * Distributed under the terms of the NewOS License. 7 */ 8 #ifndef _KERNEL_VM_VM_PAGE_H 9 #define _KERNEL_VM_VM_PAGE_H 10 11 12 #include <vm/vm.h> 13 #include <vm/vm_types.h> 14 15 16 struct kernel_args; 17 18 extern int32 gMappedPagesCount; 19 20 21 struct vm_page_reservation { 22 uint32 count; 23 }; 24 25 26 #ifdef __cplusplus 27 extern "C" { 28 #endif 29 30 void vm_page_init_num_pages(struct kernel_args *args); 31 status_t vm_page_init(struct kernel_args *args); 32 status_t vm_page_init_post_area(struct kernel_args *args); 33 status_t vm_page_init_post_thread(struct kernel_args *args); 34 35 status_t vm_mark_page_inuse(page_num_t page); 36 status_t vm_mark_page_range_inuse(page_num_t startPage, page_num_t length); 37 void vm_page_free(struct VMCache *cache, struct vm_page *page); 38 void vm_page_set_state(struct vm_page *page, int state); 39 void vm_page_requeue(struct vm_page *page, bool tail); 40 41 // get some data about the number of pages in the system 42 page_num_t vm_page_num_pages(void); 43 page_num_t vm_page_num_free_pages(void); 44 page_num_t vm_page_num_available_pages(void); 45 page_num_t vm_page_num_unused_pages(void); 46 void vm_page_get_stats(system_info *info); 47 phys_addr_t vm_page_max_address(); 48 49 status_t vm_page_write_modified_page_range(struct VMCache *cache, 50 uint32 firstPage, uint32 endPage); 51 status_t vm_page_write_modified_pages(struct VMCache *cache); 52 void vm_page_schedule_write_page(struct vm_page *page); 53 void vm_page_schedule_write_page_range(struct VMCache *cache, 54 uint32 firstPage, uint32 endPage); 55 56 void vm_page_unreserve_pages(vm_page_reservation* reservation); 57 void vm_page_reserve_pages(vm_page_reservation* reservation, uint32 count, 58 int priority); 59 bool vm_page_try_reserve_pages(vm_page_reservation* reservation, uint32 count, 60 int priority); 61 62 struct vm_page *vm_page_allocate_page(vm_page_reservation* reservation, 63 uint32 flags); 64 struct vm_page *vm_page_allocate_page_run(uint32 flags, page_num_t length, 65 const physical_address_restrictions* restrictions, int priority); 66 struct vm_page *vm_page_at_index(int32 index); 67 struct vm_page *vm_lookup_page(page_num_t pageNumber); 68 bool vm_page_is_dummy(struct vm_page *page); 69 70 #ifdef __cplusplus 71 } 72 #endif 73 74 #endif /* _KERNEL_VM_VM_PAGE_H */ 75