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>

cpu/mpc83xx/start.S

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