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_H 9 #define _KERNEL_VM_VM_H 10 11 #include <OS.h> 12 13 #include <arch/vm.h> 14 #include <vm_defs.h> 15 #include <vm/vm_types.h> 16 17 18 struct generic_io_vec; 19 struct kernel_args; 20 struct ObjectCache; 21 struct system_memory_info; 22 struct VMAddressSpace; 23 struct VMArea; 24 struct VMCache; 25 struct vm_page; 26 struct vnode; 27 struct VMPageWiringInfo; 28 29 30 // area creation flags 31 #define CREATE_AREA_DONT_WAIT 0x01 32 #define CREATE_AREA_UNMAP_ADDRESS_RANGE 0x02 33 #define CREATE_AREA_DONT_CLEAR 0x04 34 #define CREATE_AREA_PRIORITY_VIP 0x08 35 #define CREATE_AREA_DONT_COMMIT_MEMORY 0x10 36 37 // memory/page allocation priorities 38 #define VM_PRIORITY_USER 0 39 #define VM_PRIORITY_SYSTEM 1 40 #define VM_PRIORITY_VIP 2 41 42 // page reserves 43 #define VM_PAGE_RESERVE_USER 512 44 #define VM_PAGE_RESERVE_SYSTEM 128 45 46 // memory reserves 47 #define VM_MEMORY_RESERVE_USER (VM_PAGE_RESERVE_USER * B_PAGE_SIZE) 48 #define VM_MEMORY_RESERVE_SYSTEM (VM_PAGE_RESERVE_SYSTEM * B_PAGE_SIZE) 49 50 51 extern struct ObjectCache* gPageMappingsObjectCache; 52 53 54 #ifdef __cplusplus 55 extern "C" { 56 #endif 57 58 // startup only 59 status_t vm_init(struct kernel_args *args); 60 status_t vm_init_post_sem(struct kernel_args *args); 61 status_t vm_init_post_thread(struct kernel_args *args); 62 status_t vm_init_post_modules(struct kernel_args *args); 63 void vm_free_kernel_args(struct kernel_args *args); 64 void vm_free_unused_boot_loader_range(addr_t start, addr_t end); 65 page_num_t vm_allocate_early_physical_page(kernel_args *args); 66 addr_t vm_allocate_early(struct kernel_args *args, size_t virtualSize, 67 size_t physicalSize, uint32 attributes, addr_t alignment); 68 69 void slab_init(struct kernel_args *args); 70 void slab_init_post_area(); 71 void slab_init_post_sem(); 72 void slab_init_post_thread(); 73 74 // to protect code regions with interrupts turned on 75 void permit_page_faults(void); 76 void forbid_page_faults(void); 77 78 // private kernel only extension (should be moved somewhere else): 79 area_id create_area_etc(team_id team, const char *name, uint32 size, 80 uint32 lock, uint32 protection, uint32 flags, 81 const virtual_address_restrictions* virtualAddressRestrictions, 82 const physical_address_restrictions* physicalAddressRestrictions, 83 void **_address); 84 area_id transfer_area(area_id id, void** _address, uint32 addressSpec, 85 team_id target, bool kernel); 86 87 const char* vm_cache_type_to_string(int32 type); 88 89 status_t vm_block_address_range(const char* name, void* address, addr_t size); 90 status_t vm_unreserve_address_range(team_id team, void *address, addr_t size); 91 status_t vm_reserve_address_range(team_id team, void **_address, 92 uint32 addressSpec, addr_t size, uint32 flags); 93 area_id vm_create_anonymous_area(team_id team, const char* name, addr_t size, 94 uint32 wiring, uint32 protection, uint32 flags, 95 const virtual_address_restrictions* virtualAddressRestrictions, 96 const physical_address_restrictions* physicalAddressRestrictions, 97 bool kernel, void** _address); 98 area_id vm_map_physical_memory(team_id team, const char *name, void **address, 99 uint32 addressSpec, addr_t size, uint32 protection, 100 phys_addr_t physicalAddress, bool alreadyWired); 101 area_id vm_map_physical_memory_vecs(team_id team, const char* name, 102 void** _address, uint32 addressSpec, addr_t* _size, uint32 protection, 103 struct generic_io_vec* vecs, uint32 vecCount); 104 area_id vm_map_file(team_id aid, const char *name, void **address, 105 uint32 addressSpec, addr_t size, uint32 protection, uint32 mapping, 106 bool unmapAddressRange, int fd, off_t offset); 107 struct VMCache *vm_area_get_locked_cache(struct VMArea *area); 108 void vm_area_put_locked_cache(struct VMCache *cache); 109 area_id vm_create_null_area(team_id team, const char *name, void **address, 110 uint32 addressSpec, addr_t size, uint32 flags); 111 area_id vm_copy_area(team_id team, const char *name, void **_address, 112 uint32 addressSpec, uint32 protection, area_id sourceID); 113 area_id vm_clone_area(team_id team, const char *name, void **address, 114 uint32 addressSpec, uint32 protection, uint32 mapping, 115 area_id sourceArea, bool kernel); 116 status_t vm_delete_area(team_id teamID, area_id areaID, bool kernel); 117 status_t vm_create_vnode_cache(struct vnode *vnode, struct VMCache **_cache); 118 status_t vm_set_area_memory_type(area_id id, phys_addr_t physicalBase, 119 uint32 type); 120 status_t vm_get_page_mapping(team_id team, addr_t vaddr, phys_addr_t *paddr); 121 bool vm_test_map_modification(struct vm_page *page); 122 void vm_clear_map_flags(struct vm_page *page, uint32 flags); 123 void vm_remove_all_page_mappings(struct vm_page *page); 124 int32 vm_clear_page_mapping_accessed_flags(struct vm_page *page); 125 int32 vm_remove_all_page_mappings_if_unaccessed(struct vm_page *page); 126 status_t vm_wire_page(team_id team, addr_t address, bool writable, 127 struct VMPageWiringInfo* info); 128 void vm_unwire_page(struct VMPageWiringInfo* info); 129 130 status_t vm_get_physical_page(phys_addr_t paddr, addr_t* vaddr, void** _handle); 131 status_t vm_put_physical_page(addr_t vaddr, void* handle); 132 status_t vm_get_physical_page_current_cpu(phys_addr_t paddr, addr_t* vaddr, 133 void** _handle); 134 status_t vm_put_physical_page_current_cpu(addr_t vaddr, void* handle); 135 status_t vm_get_physical_page_debug(phys_addr_t paddr, addr_t* vaddr, 136 void** _handle); 137 status_t vm_put_physical_page_debug(addr_t vaddr, void* handle); 138 139 void vm_get_info(struct system_memory_info *info); 140 uint32 vm_num_page_faults(void); 141 off_t vm_available_memory(void); 142 off_t vm_available_not_needed_memory(void); 143 off_t vm_available_not_needed_memory_debug(void); 144 size_t vm_kernel_address_space_left(void); 145 146 status_t vm_memset_physical(phys_addr_t address, int value, size_t length); 147 status_t vm_memcpy_from_physical(void* to, phys_addr_t from, size_t length, 148 bool user); 149 status_t vm_memcpy_to_physical(phys_addr_t to, const void* from, size_t length, 150 bool user); 151 void vm_memcpy_physical_page(phys_addr_t to, phys_addr_t from); 152 153 status_t vm_debug_copy_page_memory(team_id teamID, void* unsafeMemory, 154 void* buffer, size_t size, bool copyToUnsafe); 155 156 // user syscalls 157 area_id _user_create_area(const char *name, void **address, uint32 addressSpec, 158 size_t size, uint32 lock, uint32 protection); 159 status_t _user_delete_area(area_id area); 160 161 area_id _user_map_file(const char *uname, void **uaddress, uint32 addressSpec, 162 size_t size, uint32 protection, uint32 mapping, 163 bool unmapAddressRange, int fd, off_t offset); 164 status_t _user_unmap_memory(void *address, size_t size); 165 status_t _user_set_memory_protection(void* address, size_t size, 166 uint32 protection); 167 status_t _user_sync_memory(void *address, size_t size, uint32 flags); 168 status_t _user_memory_advice(void* address, size_t size, uint32 advice); 169 170 area_id _user_area_for(void *address); 171 area_id _user_find_area(const char *name); 172 status_t _user_get_area_info(area_id area, area_info *info); 173 status_t _user_get_next_area_info(team_id team, int32 *cookie, area_info *info); 174 status_t _user_resize_area(area_id area, size_t newSize); 175 area_id _user_transfer_area(area_id area, void **_address, uint32 addressSpec, 176 team_id target); 177 status_t _user_set_area_protection(area_id area, uint32 newProtection); 178 area_id _user_clone_area(const char *name, void **_address, uint32 addressSpec, 179 uint32 protection, area_id sourceArea); 180 status_t _user_reserve_address_range(addr_t* userAddress, uint32 addressSpec, 181 addr_t size); 182 status_t _user_unreserve_address_range(addr_t address, addr_t size); 183 184 #ifdef __cplusplus 185 } 186 #endif 187 188 #endif /* _KERNEL_VM_VM_H */ 189