Changeset 293 for soft/giet_vm/giet_boot

Timestamp:

Mar 3, 2014, 1:44:03 PM (11 years ago)

Author:

cfuguet

Message:

Initializing the CP0 CAUSE value on the task contexts to
zero during creation of tasks (boot_scheduler_init). This
is to avoid writing non initialized data on the CAUSE
register when swithing tasks for the first time.

File:

• soft/giet_vm/giet_boot/boot.c (modified) (4 diffs)

soft/giet_vm/giet_boot/boot.c

@@ -1302 +1302 @@
             //   must be re-initialised by kernel_parallel_init()
 
+            psched->context[IDLE_TASK_INDEX][CTX_CR_ID]    = 0;
             psched->context[IDLE_TASK_INDEX][CTX_SR_ID]    = 0xFF03;
             psched->context[IDLE_TASK_INDEX][CTX_PTPR_ID]  = _ptabs_paddr[0]>>13;
@@ -1499 +1500 @@
 
             // initializes the task context in scheduler
+            psched->context[ltid][CTX_CR_ID]    = 0;
             psched->context[ltid][CTX_SR_ID]    = ctx_sr;
             psched->context[ltid][CTX_SP_ID]    = ctx_sp;
@@ -2201 +2203 @@
     unsigned int kernel_entry = (unsigned int)&seg_kernel_init_base;
 
+#if GIET_DEBUG_INIT
     _tty_get_lock( 0 );
-    _puts("\n[BOOT] Processor[");
+    _puts("\n[BOOT DEBUG] Processor[");
     _putd( cluster_xy >> Y_WIDTH );
     _puts(",");
@@ -2214 +2217 @@
     _puts("\n");
     _tty_release_lock( 0 );
+#endif
 
     asm volatile( "jr   %0" ::"r"(kernel_entry) );