Changeset 730376d in mainline for kernel/arch/sparc64/src/proc/scheduler.c

Timestamp:

2006-12-20T22:07:25Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

0af7a09

Parents:

deada67

Message:

Fix important comment in kernel/arch/sparc64/src/proc/scheduler.c.

Improve framebuffer code.

Formatting and indentation fixes.

File:

• kernel/arch/sparc64/src/proc/scheduler.c (modified) (2 diffs)

kernel/arch/sparc64/src/proc/scheduler.c

@@ -95 +95 @@
                 
                 /*
-                 * Write kernel stack address to %g6 and a pointer to the last
-                 * item in the userspace window buffer to %g7 in the alternate
-                 * and interrupt sets.
+                 * Write kernel stack address to %g6 of the alternate and
+                 * interrupt global sets.
+                 *
+                 * Write pointer to the last item in the userspace window buffer
+                 * to %g7 in the alternate set. Write to the interrupt %g7 is
+                 * not necessary because:
+                 * - spill traps operate only in the alternate global set,
+                 * - preemptible trap handler switches to alternate globals
+                 *   before it explicitly uses %g7.
                  */
                 uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE
@@ -110 +116 @@
 /** Perform sparc64 specific steps before a thread stops running.
  *
- * Demap any locked DTLB entries isntalled by the thread (i.e. kernel stack
+ * Demap any locked DTLB entries installed by the thread (i.e. kernel stack
  * and userspace window buffer).
  */