Changeset b0c2075 in mainline for kernel/arch/sparc64/src/mm/sun4u/as.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/arch/sparc64/src/mm/sun4u/as.c (modified) (1 diff)

kernel/arch/sparc64/src/mm/sun4u/as.c

@@ -63 +63 @@
 {
 #ifdef CONFIG_TSB
-        /*
-         * The order must be calculated with respect to the emulated
-         * 16K page size.
-         *
-         */
-        uint8_t order = fnzb32(((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *
-            sizeof(tsb_entry_t)) >> FRAME_WIDTH);
-        
-        uintptr_t tsb = PA2KA(frame_alloc(order, flags, 0));
+        size_t frames = SIZE2FRAMES((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *
+            sizeof(tsb_entry_t));
+        
+        uintptr_t tsb = PA2KA(frame_alloc(frames, flags, 0));
         if (!tsb)
                 return -1;
         
         as->arch.itsb = (tsb_entry_t *) tsb;
-        as->arch.dtsb = (tsb_entry_t *) (tsb + ITSB_ENTRY_COUNT *
-            sizeof(tsb_entry_t));
+        as->arch.dtsb = (tsb_entry_t *) (tsb +
+            ITSB_ENTRY_COUNT * sizeof(tsb_entry_t));
         
         memsetb(as->arch.itsb,