[U-Boot] [PATCH v2 2/5] Exynos5: Config: Place environment at the end of SPI flash

[Akshay Saraswat]

Currently environment resides at the location where BL2 ends.
This may hold good in case there is an empty space at this
position. But what if this place already has a binary or is
expected to have one. To avoid such scenarios it is better
to save environment at the end of the flash.

Signed-off-by: Akshay Saraswat <akshay.s at samsung.com>
---
Changes since v1:
	- Added new config for SPI flash size.

 include/configs/exynos5-dt.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/configs/exynos5-dt.h b/include/configs/exynos5-dt.h
index 5a9b1b4..3bcec85 100644
--- a/include/configs/exynos5-dt.h
+++ b/include/configs/exynos5-dt.h
@@ -207,7 +207,10 @@
 
 #define CONFIG_BL1_OFFSET	(CONFIG_RES_BLOCK_SIZE + CONFIG_SEC_FW_SIZE)
 #define CONFIG_BL2_OFFSET	(CONFIG_BL1_OFFSET + CONFIG_BL1_SIZE)
-#define CONFIG_ENV_OFFSET	(CONFIG_BL2_OFFSET + CONFIG_BL2_SIZE)
+
+/* Store environment at the end of a 4 MB SPI flash */
+#define FLASH_SIZE		(0x4 << 20)
+#define CONFIG_ENV_OFFSET	(FLASH_SIZE - CONFIG_BL2_SIZE)
 
 /* U-boot copy size from boot Media to DRAM.*/
 #define BL2_START_OFFSET	(CONFIG_BL2_OFFSET/512)
-- 
1.7.12.4