spl: riscv: falcon: move fdt blob to specified address
In Falcon Boot mode, the fdt blob should be move to the RAM from
kernel BSS section. To avoid being cleared by BSS initialisation.
SPL_PAYLOAD_ARGS_ADDR is the address where SPL copies.
Signed-off-by: Randolph <randolph@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 6a4772e..8805dd3 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -1113,7 +1113,7 @@
config SPL_PAYLOAD_ARGS_ADDR
hex "Address in memory to load 'args' file for Falcon Mode to"
- depends on SPL_OS_BOOT
+ depends on SPL_OS_BOOT || SPL_LOAD_FIT_OPENSBI_OS_BOOT
default 0x88000000 if ARCH_OMAP2PLUS
help
Address in memory where the 'args' file, typically a device tree
diff --git a/common/spl/spl_opensbi.c b/common/spl/spl_opensbi.c
index 9801d38..8127ebc 100644
--- a/common/spl/spl_opensbi.c
+++ b/common/spl/spl_opensbi.c
@@ -16,6 +16,7 @@
#include <opensbi.h>
#include <linux/libfdt.h>
#include <linux/printk.h>
+#include <mapmem.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -58,6 +59,20 @@
}
/*
+ * Originally, u-boot-spl will place DTB directly after the kernel,
+ * but the size of the kernel did not include the BSS section, which
+ * means u-boot-spl will place the DTB in the kernel BSS section
+ * causing the DTB to be cleared by kernel BSS initializtion.
+ * Moving DTB in front of the kernel can avoid the error.
+ */
+#if CONFIG_IS_ENABLED(LOAD_FIT_OPENSBI_OS_BOOT) && \
+ CONFIG_IS_ENABLED(PAYLOAD_ARGS_ADDR)
+ memcpy((void *)CONFIG_SPL_PAYLOAD_ARGS_ADDR, spl_image->fdt_addr,
+ fdt_totalsize(spl_image->fdt_addr));
+ spl_image->fdt_addr = map_sysmem(CONFIG_SPL_PAYLOAD_ARGS_ADDR, 0);
+#endif
+
+ /*
* Find next os image in /fit-images
* The next os image default is u-boot proper, once enable
* OpenSBI OS boot mode, the OS image should be linux.