[U-Boot] [PATCH] common/board_r: Fix booting issue on T4240QDS

[York Sun]

Commit 294b91a5817147d4b7f47be2ac69bac2a1f26491 moved initr_malloc
earlier than initr_unlock_ram_in_cache. This causes issue on T4240.
It may be related to locked L1 d-cache and unlocked L2 cache. D-
cache could and should be unlock earlier for normal operation.

This patch moves initr_unlock_ram_in_cache before initr_malloc. It
has been verified on the following boards, in which only T4240QDS
suffered and has been since fixed: T4240QDS, T2080QDS, P5040DS,
P4080DS, MPC8572DS, MPC8536DS, MPC8641HPCN, B4860QDS.

Signed-off-by: York Sun <yorksun at freescale.com>
CC: Scott Wood <scottwood at freescale.com>
CC: Simon Glass <sjg at chromium.org>
---
The root cause of the this failure wasn't identified. It may be hidden
too deep to be dug out in time. This fix preserves the order of original
code between initr_malloc and initr_unlock_ram_in_cache.

 common/board_r.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/common/board_r.c b/common/board_r.c
index 231c6d6..c339aad 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -717,6 +717,9 @@ init_fnc_t init_sequence_r[] = {
 	initr_caches,
 #endif
 	initr_reloc_global_data,
+#if defined(CONFIG_SYS_INIT_RAM_LOCK) && defined(CONFIG_E500)
+	initr_unlock_ram_in_cache,
+#endif
 	initr_barrier,
 	initr_malloc,
 	bootstage_relocate,
@@ -759,9 +762,6 @@ init_fnc_t init_sequence_r[] = {
 #ifdef CONFIG_SYS_DELAYED_ICACHE
 	initr_icache_enable,
 #endif
-#if defined(CONFIG_SYS_INIT_RAM_LOCK) && defined(CONFIG_E500)
-	initr_unlock_ram_in_cache,
-#endif
 #if defined(CONFIG_PCI) && defined(CONFIG_SYS_EARLY_PCI_INIT)
 	/*
 	 * Do early PCI configuration _before_ the flash gets initialised,
-- 
1.7.9.5