arm: socfpga: Fix bootcounter located at the end of internal SRAM
Commit 768f23dc8ae3 ("ARM: socfpga: Put stack at the end of SRAM") broke
those socfpga boards that keep the bootcounter at the end of the
internal SRAM as the bootcounter needs 8 bytes by default and thus the
very first SPL call to board_init_f_alloc_reserve overwrites the
bootcounter.
This patch allows to move the initial stack pointer down a bit by
checking if CONFIG_SYS_BOOTCOUNT_ADDR is located in the internal SRAM
area and then using this address as location for the start of the
stack pointer.
No new macros / defines are added by this approach.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
diff --git a/include/configs/socfpga_common.h b/include/configs/socfpga_common.h
index 2330143..bd8f5c8 100644
--- a/include/configs/socfpga_common.h
+++ b/include/configs/socfpga_common.h
@@ -31,8 +31,21 @@
#define CONFIG_SYS_INIT_RAM_ADDR 0xFFE00000
#define CONFIG_SYS_INIT_RAM_SIZE 0x40000 /* 256KB */
#endif
+
+/*
+ * Some boards (e.g. socfpga_sr1500) use 8 bytes at the end of the internal
+ * SRAM as bootcounter storage. Make sure to not put the stack directly
+ * at this address to not overwrite the bootcounter by checking, if the
+ * bootcounter address is located in the internal SRAM.
+ */
+#if ((CONFIG_SYS_BOOTCOUNT_ADDR > CONFIG_SYS_INIT_RAM_ADDR) && \
+ (CONFIG_SYS_BOOTCOUNT_ADDR < (CONFIG_SYS_INIT_RAM_ADDR + \
+ CONFIG_SYS_INIT_RAM_SIZE)))
+#define CONFIG_SYS_INIT_SP_ADDR CONFIG_SYS_BOOTCOUNT_ADDR
+#else
#define CONFIG_SYS_INIT_SP_ADDR \
(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE)
+#endif
#define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM_1