Changeset b0c2075 in mainline for kernel/generic/src/mm/km.c

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/src/mm/km.c (modified) (2 diffs)

kernel/generic/src/mm/km.c

@@ -247 +247 @@
          */
         uintptr_t page;
-        uintptr_t frame = frame_alloc(ONE_FRAME,
-            FRAME_HIGHMEM | FRAME_ATOMIC | flags, 0); 
+        uintptr_t frame =
+            frame_alloc(1, FRAME_HIGHMEM | FRAME_ATOMIC | flags, 0);
         if (frame) {
                 page = km_map(frame, PAGE_SIZE,
@@ -256 +256 @@
                 ASSERT(page);
         } else {
-                frame = frame_alloc(ONE_FRAME, FRAME_LOWMEM | flags, 0);
+                frame = frame_alloc(1, FRAME_LOWMEM | flags, 0);
                 if (!frame)
                         return (uintptr_t) NULL;