Changeset 275 for soft/giet_vm/giet_drivers/ioc_driver.c

Timestamp:

Jan 21, 2014, 7:20:06 PM (10 years ago)

Author:

cfuguet

Message:

• Adding volatile attribute for pointers used to address memory mapped hardware registers.

• Removing the activation of interruptions before the execution of the ctx_switch function on the ioc_access function. This is to avoid been interrupted during the modification of task context variables.

File:

• soft/giet_vm/giet_drivers/ioc_driver.c (modified) (2 diffs)

soft/giet_vm/giet_drivers/ioc_driver.c

@@ -155 +155 @@
     }
 
-    unsigned int * ioc_address = (unsigned int *) &seg_ioc_base ;
+    volatile unsigned int * ioc_address = (unsigned int *) &seg_ioc_base ;
 
     unsigned int length = count << 9;  // count * 512 bytes
@@ -358 +358 @@
         else             ioc_address[BLOCK_DEVICE_OP] = BLOCK_DEVICE_READ;
 
-        // Exit critical section 
-        _it_enable();
-
         // deschedule task
         _ctx_switch();