Rename B_MTR_* constants to "something more meaningful".

The names chosen (e.g. "B_UNCACHED_MEMORY") follow the existing naming conventions for memory-related constants, of putting the type at the end of the name: B_KERNEL_BLOCK_ADDRESS, B_FULL_LOCK, B_READ_AREA, etc. Resolves a very old TODO. No functional change intended. Change-Id: I31491f6b3abc1e95f915aa302b9f2fb2af14774c Reviewed-on: https://review.haiku-os.org/c/haiku/+/8316 Tested-by: Commit checker robot <[email protected]> Reviewed-by: Adrien Destugues <[email protected]> Reviewed-by: waddlesplash <[email protected]>
2024-09-19 16:43:24 +00:00
parent e323bc248c
commit 5c1f231967
33 changed files with 108 additions and 109 deletions
@@ -114,21 +114,20 @@ typedef struct {
 /* address specifications for mapping physical memory */
 #define	B_ANY_KERNEL_BLOCK_ADDRESS	(B_ANY_KERNEL_ADDRESS + 1)

+/* memory types for physical memory */
+#define B_UNCACHED_MEMORY			(1 << 28)
+#define B_WRITE_COMBINING_MEMORY	(2 << 28)
+#define B_WRITE_THROUGH_MEMORY		(3 << 28)
+#define B_WRITE_PROTECTED_MEMORY	(4 << 28)
+#define B_WRITE_BACK_MEMORY			(5 << 28)
+#define B_MEMORY_TYPE_MASK			(0xf0000000)
+
 /* area protection flags for the kernel */
 #define B_KERNEL_READ_AREA			(1 << 4)
 #define B_KERNEL_WRITE_AREA			(1 << 5)
 #define B_KERNEL_EXECUTE_AREA		(1 << 6)
 #define B_KERNEL_STACK_AREA			(1 << 7)

-/* MTR attributes for mapping physical memory (Intel Architecture only) */
-// TODO: rename those to something more meaningful
-#define	B_MTR_UC	0x10000000
-#define	B_MTR_WC	0x20000000
-#define	B_MTR_WT	0x30000000
-#define	B_MTR_WP	0x40000000
-#define	B_MTR_WB	0x50000000
-#define	B_MTR_MASK	0xf0000000
-

 /* kernel daemon service */