Changeset 634 for trunk/softs/tsar_boot

Timestamp:

Feb 17, 2014, 5:05:28 PM (12 years ago)

Author:

bouyer

Message:

Pass the preloader's function vector address in a0 to the next stage.
This way the next stage doesn't have to know the address of the preloader.

File:

• trunk/softs/tsar_boot/src/reset.S (modified) (2 diffs)

trunk/softs/tsar_boot/src/reset.S

@@ -66 +66 @@
     /*  Addresses of the functions provided by this reset code */
 
+preloader_vector:
     .word   RESET_VERSION           /* 0xbfc0008 */
     .word   dtb_addr                /* 0xbfc000c */
@@ -181 +182 @@
      * Processor O jumps to the entry address defined in the .elf file,
      * and returned by reset_elf_loader function.
-     * All function arguments are 0
-     */
-
-    move    a0,     zero
+     * First argument is pointer to the preloader function vectors
+     * other function arguments are 0
+     */
+
+    la      a0,     preloader_vector
     move    a1,     zero
     move    a2,     zero