[U-Boot] [PATCH 13/16] ARM: uniphier: change CONFIG_SPL_PAD_TO to 128KB

[Masahiro Yamada]

The Boot ROM supports authentication feature to prevent malformed
software from being run on products.  The signature is added at the
tail of the second stage loader (= SPL in U-boot terminology).

The size of the second stage loader was 64KB, and it was consistent
across SoCs.  The situation changed when LD20 SoC appeared; it loads
80KB second stage loader, and it is the only exception.

Currently, CONFIG_SPL_PAD_TO is set to 64KB and U-Boot proper is
loaded from the 64KB offset of non-volatile devices.  This means the
signature of LD20 SoC (located at 80KB offset) corrupts the U-Boot
proper image.

Let's move the U-Boot proper image to 128KB offset.  It uses 48KB
for nothing but padding, and we could actually locate the U-Boot
proper at 80KB offset.  However, the power of 2 generally seems a
better choice for the offset address.

Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---

 common/spl/Kconfig         |  3 +--
 include/configs/uniphier.h | 20 +++++++++++++-------
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index b1aa148..b2ba492 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -86,9 +86,8 @@ config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
 	depends on SPL && SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 	default 0x50 if ARCH_SUNXI
 	default 0x75 if ARCH_DAVINCI
-	default 0x80 if ARCH_UNIPHIER
 	default 0x8a if ARCH_MX6
-	default 0x100 if ARCH_ROCKCHIP
+	default 0x100 if ARCH_ROCKCHIP || ARCH_UNIPHIER
 	default 0x140 if ARCH_MVEBU
 	default 0x200 if ARCH_SOCFPGA || ARCH_AT91
 	default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
diff --git a/include/configs/uniphier.h b/include/configs/uniphier.h
index a53d2e3..a8a1849 100644
--- a/include/configs/uniphier.h
+++ b/include/configs/uniphier.h
@@ -231,19 +231,19 @@
 	"nor_base=0x42000000\0"					\
 	"sramupdate=setexpr tmp_addr $nor_base + 0x50000 &&"	\
 		"tftpboot $tmp_addr u-boot-spl.bin &&"		\
-		"setexpr tmp_addr $nor_base + 0x60000 &&"	\
+		"setexpr tmp_addr $nor_base + 0x70000 && " \
 		"tftpboot $tmp_addr u-boot.bin\0"		\
 	"emmcupdate=mmcsetn &&"					\
 		"mmc partconf $mmc_first_dev 0 1 1 &&"		\
 		"tftpboot u-boot-spl.bin &&"			\
-		"mmc write $loadaddr 0 80 &&"			\
+		"mmc write $loadaddr 0 100 && " \
 		"tftpboot u-boot.bin &&"			\
-		"mmc write $loadaddr 80 780\0"			\
+		"mmc write $loadaddr 100 700\0" \
 	"nandupdate=nand erase 0 0x00100000 &&"			\
 		"tftpboot u-boot-spl.bin &&"			\
-		"nand write $loadaddr 0 0x00010000 &&"		\
+		"nand write $loadaddr 0 0x00020000 && " \
 		"tftpboot u-boot.bin &&"			\
-		"nand write $loadaddr 0x00010000 0x000f0000\0"	\
+		"nand write $loadaddr 0x00020000 0x000e0000\0" \
 	LINUXBOOT_ENV_SETTINGS
 
 #define CONFIG_SYS_BOOTMAPSZ			0x20000000
@@ -283,14 +283,18 @@
 
 #define CONFIG_SPL_BOARD_INIT
 
-#define CONFIG_SYS_NAND_U_BOOT_OFFS		0x10000
+#define CONFIG_SYS_NAND_U_BOOT_OFFS		0x20000
 
 /* subtract sizeof(struct image_header) */
-#define CONFIG_SYS_UBOOT_BASE			(0x60000 - 0x40)
+#define CONFIG_SYS_UBOOT_BASE			(0x70000 - 0x40)
 
 #define CONFIG_SPL_TARGET			"u-boot-with-spl.bin"
 #define CONFIG_SPL_MAX_FOOTPRINT		0x10000
+#if defined(CONFIG_ARCH_UNIPHIER_LD20)
+#define CONFIG_SPL_MAX_SIZE			0x14000
+#else
 #define CONFIG_SPL_MAX_SIZE			0x10000
+#endif
 #if defined(CONFIG_ARCH_UNIPHIER_LD11)
 #define CONFIG_SPL_BSS_START_ADDR		0x30012000
 #elif defined(CONFIG_ARCH_UNIPHIER_LD20)
@@ -298,4 +302,6 @@
 #endif
 #define CONFIG_SPL_BSS_MAX_SIZE			0x2000
 
+#define CONFIG_SPL_PAD_TO			0x20000
+
 #endif /* __CONFIG_UNIPHIER_COMMON_H__ */
-- 
2.7.4