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authorTom Rini <trini@ti.com>2013-08-20 08:53:43 -0400
committerTom Rini <trini@ti.com>2013-08-28 11:44:58 -0400
commitc27efde68dfd7fd2da364d556d586495e78d3396 (patch)
tree253c40794a710b3b2fec9dfeb09f6f177bc2052c
parent372d7fa1bf23a33066a8a88b6fb01ea931ae1b91 (diff)
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am33xx: Correct and expand comments on CONFIG_SPL_MAX_SIZE
We had been allowing the max size to be larger than actually allowed by the ROM. Expand the commentary here to explain why we set these locations. Signed-off-by: Tom Rini <trini@ti.com>
-rw-r--r--arch/arm/include/asm/arch-am33xx/omap.h2
-rw-r--r--include/configs/ti_am335x_common.h10
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/arm/include/asm/arch-am33xx/omap.h b/arch/arm/include/asm/arch-am33xx/omap.h
index 1f84311..2250721 100644
--- a/arch/arm/include/asm/arch-am33xx/omap.h
+++ b/arch/arm/include/asm/arch-am33xx/omap.h
@@ -18,7 +18,7 @@
#ifdef CONFIG_AM33XX
#define NON_SECURE_SRAM_START 0x402F0400
#define NON_SECURE_SRAM_END 0x40310000
-#define SRAM_SCRATCH_SPACE_ADDR 0x4030C000
+#define SRAM_SCRATCH_SPACE_ADDR 0x4030B800
#elif defined(CONFIG_TI81XX)
#define NON_SECURE_SRAM_START 0x40300000
#define NON_SECURE_SRAM_END 0x40320000
diff --git a/include/configs/ti_am335x_common.h b/include/configs/ti_am335x_common.h
index fd3ffab..0eae9c8 100644
--- a/include/configs/ti_am335x_common.h
+++ b/include/configs/ti_am335x_common.h
@@ -41,9 +41,15 @@
#define CONFIG_BOOTP_SUBNETMASK
#define CONFIG_NET_RETRY_COUNT 10
-/* SPL defines. */
+/*
+ * SPL related defines. The Public RAM memory map the ROM defines the
+ * area between 0x402F0400 and 0x4030B800 as a download area and
+ * 0x4030B800 to 0x4030CE00 as a public stack area. The ROM also
+ * supports X-MODEM loading via UART, and we leverage this and then use
+ * Y-MODEM to load u-boot.img, when booted over UART.
+ */
#define CONFIG_SPL_TEXT_BASE 0x402F0400
-#define CONFIG_SPL_MAX_SIZE (0x4030C000 - CONFIG_SPL_TEXT_BASE)
+#define CONFIG_SPL_MAX_SIZE (0x4030B800 - CONFIG_SPL_TEXT_BASE)
#define CONFIG_SPL_YMODEM_SUPPORT
/*