Changeset 568 for trunk/softs/tsar_boot/README.txt

Timestamp:

Oct 30, 2013, 11:19:23 AM (10 years ago)

Author:

cfuguet

Message:

Adding support for TSAR platforms using the vci_io_bridge component.

In this case (USE_IOB=1), when a block is read from the disk controller,
the buffer containing the read data must be invalidated in the Memory
Cache as the transfer is done between the disk controller and the RAM.

File:

• trunk/softs/tsar_boot/README.txt (modified) (3 diffs)

trunk/softs/tsar_boot/README.txt

@@ -15 +15 @@
              This file is mandatory. This file defines the
              NB_PROCS per cluster, the NB_CLUSTERS and the base address of
-             the TTY, IOC and XICU devices.
+             the TTY, IOC, XICU and MEMC (config) devices.
              It defines also:
+
+              -> USE_IOB
+                 This constant is used by the boot_ioc_read function to know
+                 if the buffer used to store the blocks from the
+                 block_device must be invalidated in the memory cache after
+                 the transfert has finished.
 
               -> CACHE_COHERENCE
@@ -25 +31 @@
 
               -> CACHE_LINE_SIZE
-                 This constant is mandatory if CACHE_COHERENCE=0
+                 This constant is mandatory if CACHE_COHERENCE=0 or USE_IOB=1
                  This constant defines the size in bytes of a cache line.
 
@@ -55 +61 @@
                 seg_stack_base: Base address of the stack used by processor 0
                 during the boot process. read-write data and bss will also
-                be there.
+                be there.
 
                 seg_boot_base: Base address of the code and read-only data
-                defined for this loader
+                defined for this loader
             
 Makefile    Makefile for compile the boot loader.