[U-Boot] [PATCH 4/7] Blackfin: check for reserved settings in DDR MMRs

[Mike Frysinger]

Some bits of the DDR MMRs should not be set.  If they do, bad things may
happen (like random failures or hardware destruction).

Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
 cpu/blackfin/initcode.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c
index ffa5f61..a6e95f4 100644
--- a/cpu/blackfin/initcode.c
+++ b/cpu/blackfin/initcode.c
@@ -168,11 +168,18 @@ static inline void serial_putc(char c)
 #ifndef CONFIG_EBIU_RSTCTL_VAL
 # define CONFIG_EBIU_RSTCTL_VAL 0 /* only MDDRENABLE is useful */
 #endif
+#if ((CONFIG_EBIU_RSTCTL_VAL & 0xFFFFFFC4) != 0)
+# error invalid EBIU_RSTCTL value: must not set reserved bits
+#endif
 
 #ifndef CONFIG_EBIU_MBSCTL_VAL
 # define CONFIG_EBIU_MBSCTL_VAL 0
 #endif
 
+#if defined(CONFIG_EBIU_DDRQUE_VAL) && ((CONFIG_EBIU_DDRQUE_VAL & 0xFFFF8000) != 0)
+# error invalid EBIU_DDRQUE value: must not set reserved bits
+#endif
+
 /* Make sure our voltage value is sane so we don't blow up! */
 #ifndef CONFIG_VR_CTL_VAL
 # define BFIN_CCLK ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / CONFIG_CCLK_DIV)
-- 
1.6.1.2