Changeset 568 for trunk/softs/tsar_boot/src

Timestamp:

Oct 30, 2013, 11:19:23 AM (11 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/src/boot_ioc.c (modified) (4 diffs)

trunk/softs/tsar_boot/src/boot_ioc.c

@@ -145 +145 @@
 // SOCLIB version of the boot_ioc_read function
 
+void boot_buf_invalidate (
+        const void * buffer,
+        unsigned int line_size,
+        unsigned int size);
+
+void boot_mcc_invalidate (
+        const void * buffer,
+        unsigned int size);
+
 int boot_ioc_read(unsigned int lba, void* buffer, unsigned int count)
 {
@@ -179 +188 @@
     _boot_ioc_completed();
 
-#if (CACHE_COHERENCE == 0)
-    boot_dbuf_invalidate(buffer, CACHE_LINE_SIZE, count * 512);
+#if (CACHE_COHERENCE == 0) || (USE_IOB == 1)
+    boot_buf_invalidate(buffer, CACHE_LINE_SIZE, count * 512);
+#endif
+
+#if (USE_IOB == 1)
+    boot_mcc_invalidate(buffer, count * 512);
 #endif
 
@@ -252 +265 @@
  * buffer (identified by an address and a size).
  */
-#if (CACHE_COHERENCE == 0)
-void boot_dbuf_invalidate (
+#if (CACHE_COHERENCE == 0) || (USE_IOB == 1)
+void boot_buf_invalidate (
         const void * buffer,
         unsigned int line_size,
@@ -271 +284 @@
 #endif
 
+/**
+ * boot_mcc_inval()
+ *
+ * Invalidate all data cache lines corresponding to a memory
+ * buffer (identified by an address and a size).
+ */
+#if (USE_IOB == 1)
+void boot_mcc_invalidate (
+        const void * buffer,
+        unsigned int size)
+{
+    unsigned int * mcc_address = (unsigned int *)MCC_BASE;
+
+    // get the hard lock assuring exclusive access to MEMC
+    while (ioread32(&mcc_address[MCC_LOCK]));
+
+    // write invalidate paremeters on the memory cache
+    // this preloader use only the cluster 0 and then the HI bits are not used
+    
+    iowrite32(&mcc_address[MCC_ADDR_LO], (unsigned int) buffer);
+    iowrite32(&mcc_address[MCC_ADDR_HI], (unsigned int) 0);
+    iowrite32(&mcc_address[MCC_LENGTH] , (unsigned int) size);
+    iowrite32(&mcc_address[MCC_CMD]    , (unsigned int) MCC_CMD_INVAL);
+
+    // release the lock protecting MEMC
+    iowrite32(&mcc_address[MCC_LOCK], (unsigned int) 0);
+}
+#endif
+
 /*
  * vim: tabstop=4 : shiftwidth=4 : expandtab