Changeset eb1b8b6 in mainline

Timestamp:

2006-02-08T00:08:55Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

085d973

Parents:

8b3eebb

Message:

Change ia64 kernel image to link and load at 0x100000 where
it (or its heap or stack) won't mess up with the ROM region.

Blacklist ia64 frame 0 from frame allocator so that 0 won't be
returned to malloc and friends. This can be reenabled again
once the kernel is not identity mapped.

Files:

• arch/ia64/_link.ld.in (modified) (2 diffs)
• arch/ia64/src/mm/frame.c (modified) (1 diff)
• arch/sparc64/src/mm/frame.c (modified) (1 diff)
• generic/src/mm/buddy.c (modified) (1 diff)

arch/ia64/_link.ld.in

@@ -12 +12 @@
 
 SECTIONS {
-        .image 0x0000000000001000: AT (0x0000000000001000) { 
+        .image 0x0000000000100000: AT (0x0000000000100000) { 
                 ktext_start = .;
                 *(K_TEXT_START);
@@ -38 +38 @@
         _hardcoded_ktext_size = ktext_end - ktext_start;
         _hardcoded_kdata_size = kdata_end - kdata_start;
-        _hardcoded_load_address = 0x0000000000001000;
+        _hardcoded_load_address = 0x0000000000100000;
 
 }

arch/ia64/src/mm/frame.c

@@ -42 +42 @@
 {
         /*
+         * Workaround to prevent slab allocator from allocating frame 0.
+         * Remove the following statement when the kernel is no longer
+         * identity mapped.
+         */
+        frame_region_not_free(0, FRAME_SIZE);
+
+        /*
          * Blacklist ROM regions.
          */

arch/sparc64/src/mm/frame.c

@@ -34 +34 @@
 {
         /*
-         * Workaround to prevent slab allocator from allocating frame 0,
-         * which is not mapped by OFW.
+         * Workaround to prevent slab allocator from allocating frame 0.
+         * Frame 0 is
+         * a) not mapped by OFW
+         * b) would be confused with NULL error return code
          */
         frame_region_not_free(0, FRAME_SIZE);

generic/src/mm/buddy.c

@@ -169 +169 @@
         /*
          * Return the other half to buddy system.
-         * PROBLEM!!!! FILL FIND OTHER PART AS BUDDY AND LINK TOGETHER
+         * PROBLEM!!!! WILL FIND OTHER PART AS BUDDY AND LINK TOGETHER
          */
         b->op->mark_busy(b, res);