sh: Add a flag which controls the DDR ECC mode of sh7757lcr

When DDR-ECC is effective, the physical memory which can be used
reduces this boardby half. However, this mode can chenge to disable.
When it was disabled, user can use 512 MB of physical memory.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
CC: "Yoshihiro Shimoda" <yoshihiro.shimoda.uh@renesas.com>
Acked-by: "Yoshihiro Shimoda" <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

diff --git a/board/renesas/sh7757lcr/lowlevel_init.S b/board/renesas/sh7757lcr/lowlevel_init.S
index ab1aa49..5090fd0 100644 (file)
--- a/board/renesas/sh7757lcr/lowlevel_init.S
+++ b/board/renesas/sh7757lcr/lowlevel_init.S
@@ -326,12 +326,13 @@ PC_MASK:  .long   0x20000000
        /* step 26 */
        wait_DBCMD
 
+#if defined(CONFIG_SH7757LCR_DDR_ECC)
        /* enable DDR-ECC */
        write32 ECD_ECDEN_A, ECD_ECDEN_D
        write32 ECD_INTSR_A, ECD_INTSR_D
        write32 ECD_SPACER_A, ECD_SPACER_D
        write32 ECD_MCR_A, ECD_MCR_D
-
+#endif
        bra     exit_ddr
        nop
 

diff --git a/include/configs/sh7757lcr.h b/include/configs/sh7757lcr.h
index fe11a17..c1f9ce8 100644 (file)
--- a/include/configs/sh7757lcr.h
+++ b/include/configs/sh7757lcr.h
@@ -31,6 +31,7 @@
 #define CONFIG_SH_32BIT                1
 #define CONFIG_CPU_SH7757      1
 #define CONFIG_SH7757LCR       1
+#define CONFIG_SH7757LCR_DDR_ECC       1
 
 #define CONFIG_SYS_TEXT_BASE   0x8ef80000
 #define CONFIG_SYS_LDSCRIPT    "board/renesas/sh7757lcr/u-boot.lds"