Changes between Version 33 and Version 34 of WikiStart

Timestamp:

Oct 10, 2014, 3:03:47 PM (10 years ago)

Author:

alain

Comment:

--

WikiStart

@@ -7 +7 @@
 == __B) Peripherals Drivers__ ==
 
-The GIET_VM supports two types of peripheral components: '''External peripherals''' are located in one single cluster identified by the [X_IO,Y_IO] variables, '''Internal peripherals''' are replicated in all clusters.
+The GIET_VM supports two types of peripheral components: '''External peripherals''' are located in one single cluster (called ''cluster_io'', and identified by the ''X_IO,Y_IO'' variables); '''Internal peripherals''' are replicated in all clusters.
 
 Each driver xxx_driver define two low-level functions ''_xxx_get_register()'' and ''_xxx_set_register()''
-to access the peripheral addressable registers. These functions are in charge to compute the physical addresses, taking into account the cluster extension if required. 
+to access the peripheral addressable registers. These functions are in charge to compute the peripheral physical addresses, taking into account the cluster extension if required: 
 
  * '''External peripherals''': Accesses use virtual addresses if the MMU (Memory management Unit) is activated, or physical addresses if it is not. In this case, the physical address is computed as pbase = SEG_XXX_BASE + cluster_io << 32.