Changeset 3e1607f in mainline

Timestamp:

2005-08-31T22:00:32Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

cd95d784

Parents:

d2bb9f8a

Message:

Add some comments.

Files:

• arch/mips/src/exception.c (modified) (1 diff)
• src/proc/scheduler.c (modified) (2 diffs)
• src/proc/thread.c (modified) (1 diff)

arch/mips/src/exception.c

@@ -40 +40 @@
         __u32 epc_shift = 0;
         pri_t pri;
-        
+
+        /*
+         * NOTE ON OPERATION ORDERING
+         *
+         * On entry, cpu_priority_high() must be called before exception bit is cleared.
+         * On exit, exception bit must be set before cpu_priority_restore() is called.
+         */
+
         pri = cpu_priority_high();
         epc = cp0_epc_read();

src/proc/scheduler.c

@@ -136 +136 @@
                         continue;
                 }
-        
+
                 /* avoid deadlock with relink_rq() */
                 if (!spinlock_trylock(&CPU->lock)) {
@@ -413 +413 @@
         #endif  
 
+        /*
+         * Copy the knowledge of CPU, TASK, THREAD and preemption counter to thread's stack.
+         */
         the_copy(THE, (the_t *) THREAD->kstack);
         

src/proc/thread.c

@@ -76 +76 @@
         void *arg = THREAD->thread_arg;
 
+        /* this is where each thread wakes up after its creation */
         before_thread_runs();
 
-        /* this is where each thread wakes up after its creation */
         spinlock_unlock(&THREAD->lock);
         cpu_priority_low();