1 /* 2 * Copyright 2002-2008, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 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 _SYSTEM_VM_DEFS_H 9 #define _SYSTEM_VM_DEFS_H 10 11 #include <OS.h> 12 13 14 #define B_USER_PROTECTION \ 15 (B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA | B_STACK_AREA) 16 #define B_KERNEL_PROTECTION \ 17 (B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA \ 18 | B_KERNEL_STACK_AREA) 19 20 // TODO: These aren't really protection flags, but since the "protection" 21 // field is the only flag field, we currently use it for this. 22 // A cleaner approach would be appreciated - maybe just an official generic 23 // flags region in the protection field. 24 #define B_OVERCOMMITTING_AREA (1 << 12) 25 #define B_SHARED_AREA (1 << 13) 26 #define B_KERNEL_AREA (1 << 14) 27 // Usable from userland according to its protection flags, but the area 28 // itself is not deletable, resizable, etc from userland. 29 30 #define B_USER_AREA_FLAGS \ 31 (B_USER_PROTECTION | B_OVERCOMMITTING_AREA | B_CLONEABLE_AREA) 32 #define B_KERNEL_AREA_FLAGS \ 33 (B_KERNEL_PROTECTION | B_SHARED_AREA) 34 35 // mapping argument for several internal VM functions 36 enum { 37 REGION_NO_PRIVATE_MAP = 0, 38 REGION_PRIVATE_MAP 39 }; 40 41 enum { 42 // TODO: these are here only temporarily - it's a private 43 // addition to the BeOS create_area() lock flags 44 B_ALREADY_WIRED = 7, 45 }; 46 47 #define MEMORY_TYPE_SHIFT 28 48 49 50 #endif /* _SYSTEM_VM_DEFS_H */ 51