Changeset b0c2075 in mainline for kernel/test/mm/mapping1.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/test/mm/mapping1.c (modified) (2 diffs)

kernel/test/mm/mapping1.c

@@ -41 +41 @@
 const char *test_mapping1(void)
 {
-        uintptr_t page0, page1;
-        uint32_t v;
+        uintptr_t frame = frame_alloc(1, FRAME_NONE, 0);
         
-        uintptr_t frame = frame_alloc(ONE_FRAME, FRAME_NONE, 0);
-        
-        page0 = km_map(frame, FRAME_SIZE,
+        uintptr_t page0 = km_map(frame, FRAME_SIZE,
             PAGE_READ | PAGE_WRITE | PAGE_CACHEABLE);
         TPRINTF("Virtual address %p mapped to physical address %p.\n",
             (void *) page0, (void *) frame);
-        page1 = km_map(frame, FRAME_SIZE,
+        
+        uintptr_t page1 = km_map(frame, FRAME_SIZE,
             PAGE_READ | PAGE_WRITE | PAGE_CACHEABLE);
         TPRINTF("Virtual address %p mapped to physical address %p.\n",
@@ -62 +60 @@
                 TPRINTF("Reading magic using the second virtual address.\n");
                 
-                v = *((uint32_t *) page1);
+                uint32_t v = *((uint32_t *) page1);
                 
                 if (v != TEST_MAGIC) {