6b202f4e3d
to contain headers shared by kernel and userland (mainly libroot). * Moved quite a few private kernel headers to the new location. Split several kernel headers into a shared part and one that is still kernel private. Adjusted all affected Jamfiles and source in the standard x86 build accordingly. The build for other architectures and for test code may be broken. * Quite a bit of userland code still includes private kernel headers. Mostly those are <util/*> headers. The ones that aren't strictly kernel-only should be moved to some other place (maybe headers/private/shared/util). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25486 a95241bf-73f2-0310-859d-f6bbb57e9c96
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
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* Copyright 2002-2008, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _SYSTEM_VM_DEFS_H
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#define _SYSTEM_VM_DEFS_H
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#include <OS.h>
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// additional protection flags
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// Note: the VM probably won't support all combinations - it will try
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// its best, but create_area() will fail if it has to.
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// Of course, the exact behaviour will be documented somewhere...
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#define B_EXECUTE_AREA 0x04
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#define B_STACK_AREA 0x08
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// "stack" protection is not available on most platforms - it's used
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// to only commit memory as needed, and have guard pages at the
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// bottom of the stack.
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// "execute" protection is currently ignored, but nevertheless, you
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// should use it if you require to execute code in that area.
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#define B_KERNEL_EXECUTE_AREA 0x40
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#define B_KERNEL_STACK_AREA 0x80
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#define B_USER_PROTECTION \
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(B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA | B_STACK_AREA)
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#define B_KERNEL_PROTECTION \
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(B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA \
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| B_KERNEL_STACK_AREA)
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// TODO: These aren't really a protection flags, but since the "protection"
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// field is the only flag field, we currently use it for this.
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// A cleaner approach would be appreciated - maybe just an official generic
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// flags region in the protection field.
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#define B_OVERCOMMITTING_AREA 0x1000
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#define B_SHARED_AREA 0x2000
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#define B_KERNEL_AREA 0x4000
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// Usable from userland according to its protection flags, but the area
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// itself is not deletable, resizable, etc from userland.
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#define B_USER_AREA_FLAGS (B_USER_PROTECTION)
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#define B_KERNEL_AREA_FLAGS \
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(B_KERNEL_PROTECTION | B_USER_CLONEABLE_AREA | B_OVERCOMMITTING_AREA \
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| B_SHARED_AREA)
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// flags for vm_get_physical_page()
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enum {
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PHYSICAL_PAGE_NO_WAIT = 0,
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PHYSICAL_PAGE_CAN_WAIT,
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};
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// mapping argument for several internal VM functions
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enum {
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REGION_NO_PRIVATE_MAP = 0,
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REGION_PRIVATE_MAP
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};
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enum {
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// ToDo: these are here only temporarily - it's a private
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// addition to the BeOS create_area() lock flags
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B_ALREADY_WIRED = 6,
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};
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#define MEMORY_TYPE_SHIFT 28
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#endif /* _SYSTEM_VM_DEFS_H */
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