83xx NAND boot: wait for LTESR[CC]
At least some revisions of the 8313, and possibly other chips, do not
wait for all pages of the initial 4K NAND region to be loaded before
beginning execution; thus, we wait for it before branching out of the
first NAND page.
This fixes warm reset problems when booting from NAND on 8313erdb.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/cpu/mpc83xx/start.S b/cpu/mpc83xx/start.S
index 14bfbda..6ff6682 100644
--- a/cpu/mpc83xx/start.S
+++ b/cpu/mpc83xx/start.S
@@ -167,6 +167,18 @@
/* Initialise the E300 processor core */
/*------------------------------------------*/
+#ifdef CONFIG_NAND_SPL
+ /* The FCM begins execution after only the first page
+ * is loaded. Wait for the rest before branching
+ * to another flash page.
+ */
+ addi r7, r3, 0x50b0
+1: dcbi 0, r7
+ lwz r6, 0(r7)
+ andi. r6, r6, 1
+ beq 1b
+#endif
+
bl init_e300_core
#ifdef CFG_FLASHBOOT