Changeset 490 for soft/giet_vm/giet_drivers/xcu_driver.c

Timestamp:

Jan 16, 2015, 1:24:18 PM (9 years ago)

Author:

haoliu

Message:

Implemented a new way to construct the ptabs in boot. In the map.bin file,
each physical segment in cluster[x][y] is handled by the processor[x][y][0]. So
the constrcuting of page table is done in parrallel by all the
processor[x][y][0] at the same time.

This way spents less time than the constructing sequential by one processor(
the processor[0][0][0])

File:

• soft/giet_vm/giet_drivers/xcu_driver.c (modified) (1 diff)

soft/giet_vm/giet_drivers/xcu_driver.c

@@ -181 +181 @@
 } 
 
+////////////////////////////////////////////
+void _xcu_send_wti_paddr( unsigned int cluster_xy,
+                          unsigned int wti_index,
+                          unsigned int wdata )
+{ 
+#if USE_XCU
+    // parameters checking 
+    unsigned int x = cluster_xy >> Y_WIDTH;
+    unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
+    if (x >= X_SIZE)               _exit(); 
+    if (y >= Y_SIZE)               _exit(); 
+    if (wti_index >= 32)           _exit(); 
+
+    paddr_t paddr =
+         SEG_XCU_BASE + ((paddr_t)cluster_xy << 32) + 
+        (XCU_REG(XCU_WTI_REG, wti_index) << 2);
+
+    _physical_write(paddr, wdata);
+
+#else
+    _puts("[GIET ERROR] _xcu_send_wti() should not be used if USE_XCU is not set\n");
+    _exit();
+#endif
+}
 ///////////////////////////////////////////////////
 void _xcu_get_wti_value( unsigned int   cluster_xy,