Patchwork [U-Boot] sh: Add a flag which controls the DDR ECC mode of sh7757lcr

login
register
mail settings
Submitter Nobuhiro Iwamatsu
Date Oct. 31, 2011, 4:22 a.m.
Message ID <1320034944-15419-1-git-send-email-nobuhiro.iwamatsu.yj@renesas.com>
Download mbox | patch
Permalink /patch/122719/
State Accepted
Commit 3ed81645874413d31c5012cb958abd3bc5008b0c
Headers show

Comments

Nobuhiro Iwamatsu - Oct. 31, 2011, 4:22 a.m.
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>

---
 board/renesas/sh7757lcr/lowlevel_init.S |    3 ++-
 include/configs/sh7757lcr.h             |    1 +
 2 files changed, 3 insertions(+), 1 deletions(-)
Yoshihiro Shimoda - Oct. 31, 2011, 7:36 a.m.
Hi,

2011/10/31 13:22, Nobuhiro Iwamatsu wrote:
> 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>

Thank you for the patch.

Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

Thanks,
Yoshihiro Shimoda

Patch

diff --git a/board/renesas/sh7757lcr/lowlevel_init.S b/board/renesas/sh7757lcr/lowlevel_init.S
index ab1aa49..5090fd0 100644
--- 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 63b39d6..40fafc2 100644
--- 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"