Changeset 653 for trunk/softs/tsar_boot/src/reset_utils.c

Timestamp:

Mar 3, 2014, 5:11:06 PM (10 years ago)

Author:

cfuguet

Message:

Introducing a RAMDISK driver in the preloader.

When using RAMDISK, execute the make command with the flags
SOCLIB=1 and RAMDISK=1. The RDK_PADDR_BASE variable must
also be set on the conf/<platform>/defs_platform.h

These modifications are backward compatibles. Therefore,
when no using RAMDISK, none modifications applied on the
platform configuration file.

File:

• trunk/softs/tsar_boot/src/reset_utils.c (modified) (8 diffs)

trunk/softs/tsar_boot/src/reset_utils.c

@@ -9 +9 @@
 #include <reset_utils.h>
 
-/*****************************************
+/********************************************************************
  * proctime()
  *
  * Returns processor local time.
- ****************************************/
+ ********************************************************************/
 inline unsigned int proctime() 
 {
@@ -21 +21 @@
 }
 
-/*****************************************
+/********************************************************************
  * memcpy( _dst, _src, size )
  *
@@ -30 +30 @@
  * \param size   : Number of bytes to transfer 
  *
- ****************************************/
+ ********************************************************************/
 void * memcpy(void *_dst, const void *_src, unsigned int size)
 {
@@ -52 +52 @@
 }
 
-/*****************************************
+/********************************************************************
  * memset( _dst, value, size )
  *
@@ -61 +61 @@
  * \param size   : Number of bytes to initialize
  *
- ****************************************/
+ ********************************************************************/
 void * memset(void *_dst, const int value, unsigned int size)
 {
@@ -71 +71 @@
 }
 
-/*****************************************
+/********************************************************************
  * reset_print_elf_phdr( elf_phdr_ptr )
  *
@@ -78 +78 @@
  * \param elf_phdr_ptr : Pointer to the ELF program header to print
  *
- ****************************************/
+ ********************************************************************/
 void reset_print_elf_phdr(Elf32_Phdr * elf_phdr_ptr)
 {
@@ -106 +106 @@
 }
 
+
+/********************************************************************
+ * reset_mcc_inval()
+ *
+ * Invalidate all data cache lines corresponding to a memory buffer
+ * (identified by an address and a size) in L2 cache.
+ ********************************************************************/
+#if USE_IOB 
+void reset_mcc_invalidate ( const void * buffer,
+                            unsigned int size)
+{
+    unsigned int * mcc_address = (unsigned int *)MCC_PADDR_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
+
+/********************************************************************
+ * reset_dcache_buf_invalidate()
+ *
+ * Invalidate all data cache lines corresponding to a memory buffer
+ * (identified by an address and a size) in L1 cache and L2 cache.
+ ********************************************************************/
+#if (CACHE_COHERENCE == 0) || USE_IOB
+void reset_buf_invalidate ( const void * buffer,
+                            unsigned int line_size,
+                            unsigned int size)
+{
+    unsigned int i;
+
+    // iterate on cache lines
+    for (i = 0; i <= size; i += line_size) 
+    {
+        asm volatile(
+            " cache %0, %1"
+            :// no outputs
+            :"i" (0x11), "R" (*((unsigned char *) buffer + i))
+            );
+    }
+
+#if USE_IOB 
+    reset_mcc_invalidate(buffer, count * 512);
+#endif
+}
+#endif
+
 // vim: tabstop=4 : softtabstop=4 : shiftwidth=4 : expandtab