Changeset b0c2075 in mainline for kernel/genarch/src/mm/page_pt.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/genarch/src/mm/page_pt.c (modified) (5 diffs)

kernel/genarch/src/mm/page_pt.c

@@ -82 +82 @@
         
         if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
-                pte_t *newpt = (pte_t *) PA2KA(frame_alloc(PTL1_SIZE,
-                    FRAME_LOWMEM, 0));
-                memsetb(newpt, FRAME_SIZE << PTL1_SIZE, 0);
+                pte_t *newpt = (pte_t *)
+                    PA2KA(frame_alloc(PTL1_FRAMES, FRAME_LOWMEM, 0));
+                memsetb(newpt, FRAMES2SIZE(PTL1_FRAMES), 0);
                 SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));
                 SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page),
@@ -101 +101 @@
         
         if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {
-                pte_t *newpt = (pte_t *) PA2KA(frame_alloc(PTL2_SIZE,
-                    FRAME_LOWMEM, 0));
-                memsetb(newpt, FRAME_SIZE << PTL2_SIZE, 0);
+                pte_t *newpt = (pte_t *)
+                    PA2KA(frame_alloc(PTL2_FRAMES, FRAME_LOWMEM, 0));
+                memsetb(newpt, FRAMES2SIZE(PTL2_FRAMES), 0);
                 SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));
                 SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page),
@@ -118 +118 @@
         
         if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {
-                pte_t *newpt = (pte_t *) PA2KA(frame_alloc(PTL3_SIZE,
-                    FRAME_LOWMEM, 0));
-                memsetb(newpt, FRAME_SIZE << PTL3_SIZE, 0);
+                pte_t *newpt = (pte_t *)
+                    PA2KA(frame_alloc(PTL3_FRAMES, FRAME_LOWMEM, 0));
+                memsetb(newpt, FRAMES2SIZE(PTL3_FRAMES), 0);
                 SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));
                 SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page),
@@ -371 +371 @@
         uintptr_t ptl0 = PA2KA((uintptr_t) AS_KERNEL->genarch.page_table);
         uintptr_t ptl0_step = ptl0_step_get();
-        size_t order;
+        size_t frames;
         
 #if (PTL1_ENTRIES != 0)
-        order = PTL1_SIZE;
+        frames = PTL1_FRAMES;
 #elif (PTL2_ENTRIES != 0)
-        order = PTL2_SIZE;
+        frames = PTL2_FRAMES;
 #else
-        order = PTL3_SIZE;
+        frames = PTL3_FRAMES;
 #endif
         
@@ -384 +384 @@
             addr - 1 < base + size - 1;
             addr += ptl0_step) {
-                uintptr_t l1 = PA2KA(frame_alloc(order, FRAME_LOWMEM, 0));
-                memsetb((void *) l1, FRAME_SIZE << order, 0);
+                uintptr_t l1 = PA2KA(frame_alloc(frames, FRAME_LOWMEM, 0));
+                memsetb((void *) l1, FRAMES2SIZE(frames), 0);
                 SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(addr), KA2PA(l1));
                 SET_PTL1_FLAGS(ptl0, PTL0_INDEX(addr),