i2p/haiku-beta6
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Adds some private kernel extensions to the BeOS VM/API: things like

Browse Source 
B_EXACT_KERNEL_ADDRESS, B_KERNEL_READ_AREA, ...
They are preliminary defined here.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4315 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2003-08-19 14:14:26 +00:00
parent 640d0ba831
commit 5d4b10645c
1 changed files with 34 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
headers/private/kernel/vm_types.h
+34 -7
View File
@@ -157,7 +157,11 @@ typedef struct vm_store_ops {
// args for the create_area funcs
enum {
REGION_ADDR_ANY_ADDRESS = 0,
REGION_ADDR_EXACT_ADDRESS
REGION_ADDR_EXACT_ADDRESS,
// ToDo: these are here only temporarily - it's a private
// addition to the BeOS create_area() flags
B_EXACT_KERNEL_ADDRESS = 5
};
enum {
@@ -169,17 +173,40 @@ enum {
REGION_WIRING_LAZY = 0,
REGION_WIRING_WIRED,
REGION_WIRING_WIRED_ALREADY,
REGION_WIRING_WIRED_CONTIG
};
REGION_WIRING_WIRED_CONTIG,
// ToDo: these are here only temporarily - it's a private
// addition to the BeOS create_area() flags
B_ALREADY_WIRED = 5
};
enum {
PHYSICAL_PAGE_NO_WAIT = 0,
PHYSICAL_PAGE_CAN_WAIT,
};
#define LOCK_RO 0x0
#define LOCK_RW 0x1
#define LOCK_KERNEL 0x2
#define LOCK_MASK 0x3
// additional protection flags
// Note: the VM probably won't support all combinations - it will try
// its best, but create_area() will fail if it has to.
// Of course, the exact behaviour will be documented somewhere...
#define B_EXECUTE_AREA 4
// "execute" protection is not available on x86 - but defining it
// doesn't hurt too much, either :-)
// (but don't use it right now, it's not yet supported at all)
#define B_KERNEL_READ_AREA 8
#define B_KERNEL_WRITE_AREA 16
#define B_KERNEL_EXECUTE_AREA 32
#define B_USER_PROTECTION (B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA)
#define B_KERNEL_PROTECTION (B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA)
#define LOCK_RO 0
#define LOCK_RW 1
#define LOCK_KERNEL (B_KERNEL_PROTECTION)
#define PROTECTION_TO_LOCK(protection) \
(protection & B_KERNEL_PROTECTION ? \
((protection & B_KERNEL_WRITE_AREA ? LOCK_RW : LOCK_RO) | LOCK_KERNEL) \
: (protection & B_WRITE_AREA ? LOCK_RW : LOCK_RO))
#endif /* _KERNEL_VM_TYPES_H */