mpc83xx: Put the version (and magic) after the HRCW.

Put the version (and magic) after the HRCW.  This puts it in a fixed
location in flash, not at the start of flash but as close as we can get.

Signed-off-by: Jerry Van Baren <vanbaren@cideas.com>

diff --git a/cpu/mpc83xx/start.S b/cpu/mpc83xx/start.S
index 0f27bb61f8cec196394b61ac00208dbff119b7e2..6ee9ec96c97b888b812871a43e440a2aa92300fb 100644 (file)
--- a/cpu/mpc83xx/start.S
+++ b/cpu/mpc83xx/start.S
@@ -77,19 +77,11 @@
        END_GOT
 
 /*
- * Version string - must be in data segment because MPC83xx uses the
- * first 256 bytes for the Hard Reset Configuration Word table (see
- * below).  Similarly, can't have the U-Boot Magic Number as the first
- * thing in the image - don't know how this will affect the image tools,
- * but I guess I'll find out soon.
+ * The Hard Reset Configuration Word (HRCW) table is in the first 64
+ * (0x40) bytes of flash.  It has 8 bytes, but each byte is repeated 8
+ * times so the processor can fetch it out of flash whether the flash
+ * is 8, 16, 32, or 64 bits wide (hardware trickery).
  */
-       .data
-       .globl  version_string
-version_string:
-       .ascii U_BOOT_VERSION
-       .ascii " (", __DATE__, " - ", __TIME__, ")"
-       .ascii " ", CONFIG_IDENT_STRING, "\0"
-
        .text
 #define _HRCW_TABLE_ENTRY(w)           \
        .fill   8,1,(((w)>>24)&0xff);   \
@@ -100,6 +92,18 @@ version_string:
        _HRCW_TABLE_ENTRY(CFG_HRCW_LOW)
        _HRCW_TABLE_ENTRY(CFG_HRCW_HIGH)
 
+/*
+ * Magic number and version string - put it after the HRCW since it
+ * cannot be first in flash like it is in many other processors.
+ */
+       .long   0x27051956              /* U-Boot Magic Number */
+
+       .globl  version_string
+version_string:
+       .ascii U_BOOT_VERSION
+       .ascii " (", __DATE__, " - ", __TIME__, ")"
+       .ascii " ", CONFIG_IDENT_STRING, "\0"
+
 
 #ifndef CONFIG_DEFAULT_IMMR
 #error CONFIG_DEFAULT_IMMR must be defined