Changeset 428 for soft/giet_vm/giet_kernel/sys_handler.c

Timestamp:

Oct 4, 2014, 3:19:32 PM (10 years ago)

Author:

alain

Message:

Introducing fixed format (X_WIDTH / Y_WIDTH / P_WIDTH) for processor index.

File:

• soft/giet_vm/giet_kernel/sys_handler.c (modified) (3 diffs)

soft/giet_vm/giet_kernel/sys_handler.c

@@ -35 +35 @@
 const void * _syscall_vector[64] = 
 {
-    &_get_procid,          /* 0x00 */
+    &_proc_xyp,            /* 0x00 */
     &_get_proctime,        /* 0x01 */
     &_tty_write,           /* 0x02 */
@@ -113 +113 @@
 }
 
+//////////////////////////////////////////////////////////////////////////////
+// This function returns the processor (x,y,p) identifiers.
+//////////////////////////////////////////////////////////////////////////////
+void _proc_xyp( unsigned int* x,
+                unsigned int* y,
+                unsigned int* p )
+{
+    unsigned int gpid = _get_procid();  // global processor index from CPO register
+
+    *x = (gpid >> (Y_WIDTH + P_WIDTH)) & ((1<<X_WIDTH)-1);
+    *y = (gpid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
+    *p = gpid & ((1<<P_WIDTH)-1);
+}
 ////////////////////////////////////////////////////////////////////////////
 // Task suicide... after printing a death message.
@@ -119 +132 @@
 {
     unsigned int date       = _get_proctime();
-    unsigned int proc_id    = _get_procid();
-    unsigned int cluster_xy = proc_id / NB_PROCS_MAX;
+
+    unsigned int gpid       = _get_procid();
+    unsigned int cluster_xy = gpid >> P_WIDTH;
     unsigned int y          = cluster_xy & ((1<<Y_WIDTH)-1);
     unsigned int x          = cluster_xy >> Y_WIDTH;
-    unsigned int lpid       = proc_id % NB_PROCS_MAX;
+    unsigned int lpid       = gpid & ((1<<P_WIDTH)-1);
+
     unsigned int task_id    = _get_context_slot(CTX_LTID_ID);