Changeset b0c2075 in mainline for kernel/generic/include/macros.h

Timestamp:

2013-09-10T17:48:57Z (11 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

85147f3

Parents:

86733f3

Message:

new physical memory allocator supporting physical address constrains
the buddy allocator framework is retired and replaced by a two-level bitmap
the allocator can allocate an arbitrary number of frames, not only a power-of-two count

Caution: Change of semantics
The physical memory allocator no longer allocates naturally aligned blocks. If you require an aligned block, specify it as the constraint.

File:

• kernel/generic/include/macros.h (modified) (1 diff)

kernel/generic/include/macros.h

@@ -117 +117 @@
         overlaps(KA2PA((x)), (szx), KA2PA((y)), (szy))
 
+#define PFN2ADDR(frame)  ((frame) << FRAME_WIDTH)
+#define ADDR2PFN(addr)   ((addr) >> FRAME_WIDTH)
+
+#define FRAMES2SIZE(frames)  ((frames) << FRAME_WIDTH)
+#define SIZE2FRAMES(size) \
+        (((size) == 0) ? 0 : ((((size) - 1) >> FRAME_WIDTH) + 1))
+
 #define KiB2SIZE(kb)  ((kb) << 10)
 #define MiB2SIZE(mb)  ((mb) << 20)