Changeset be544ef in mainline

Timestamp:

2006-11-18T16:21:34Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

d4f184f

Parents:

79f119b9

Message:

sparc64 work:

• fix computation of the frame allocator configuration frame
• mark the first physical frame unavailable, no matter what is its address

Because of that, we can now boot past the frame_arch_init() on the Ultra 60 now.

File:

• kernel/arch/sparc64/src/mm/frame.c (modified) (1 diff)

kernel/arch/sparc64/src/mm/frame.c

@@ -65 +65 @@
         
                         confdata = ADDR2PFN(start);
-                        if (confdata == 0)
-                                confdata = 2;
+                        if (confdata == ADDR2PFN(KA2PA(PFN2ADDR(0))))
+                                confdata = ADDR2PFN(KA2PA(PFN2ADDR(2)));
                         zone_create(ADDR2PFN(start), SIZE2FRAMES(ALIGN_DOWN(size, FRAME_SIZE)), confdata, 0);
-                
                         last_frame = max(last_frame, start + ALIGN_UP(size, FRAME_SIZE));
                 }
         }
-
+        
+        /*
+         * On sparc64, physical memory can start on a non-zero address.
+         * The generic frame_init() only marks PFN 0 as not free, so we
+         * must mark the physically first frame not free explicitly here,
+         * no matter what is its address.
+         */
+        frame_mark_unavailable(ADDR2PFN(KA2PA(PFN2ADDR(0))), 1);
 }