SPL: Add XIP booting support
Enable support for XIP (execute in place) of U-Boot or kernel image. There is
no need to copy image from flash to ram if flash supports execute in place.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Alexandru Gagniuc <alex.g@adaptrum.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 732690c..4de8139 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -437,6 +437,15 @@
a memory-mapped device makes it very easy to access. Loading from
NOR is typically achieved with just a memcpy().
+config SPL_XIP_SUPPORT
+ bool "Support XIP"
+ depends on SPL
+ help
+ Enable support for execute in place of U-Boot or kernel image. There
+ is no need to copy image from flash to ram if flash supports execute
+ in place. Its very useful in systems having enough flash but not
+ enough ram to load the image.
+
config SPL_ONENAND_SUPPORT
bool "Support OneNAND flash"
help
diff --git a/common/spl/Makefile b/common/spl/Makefile
index b3b34d6..47a64dd 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -12,6 +12,7 @@
obj-$(CONFIG_SPL_FRAMEWORK) += spl.o
obj-$(CONFIG_SPL_LOAD_FIT) += spl_fit.o
obj-$(CONFIG_SPL_NOR_SUPPORT) += spl_nor.o
+obj-$(CONFIG_SPL_XIP_SUPPORT) += spl_xip.o
obj-$(CONFIG_SPL_YMODEM_SUPPORT) += spl_ymodem.o
ifndef CONFIG_SPL_UBI
obj-$(CONFIG_SPL_NAND_SUPPORT) += spl_nand.o
diff --git a/common/spl/spl_xip.c b/common/spl/spl_xip.c
new file mode 100644
index 0000000..18c7d11
--- /dev/null
+++ b/common/spl/spl_xip.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2017 Vikas Manocha <vikas.manocha@st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+
+static int spl_xip(struct spl_image_info *spl_image,
+ struct spl_boot_device *bootdev)
+{
+#ifdef CONFIG_SPL_OS_BOOT
+ if (!spl_start_uboot()) {
+ spl_image->arg = (void *)CONFIG_SYS_FDT_BASE;
+ spl_image->name = "Linux";
+ spl_image->os = IH_OS_LINUX;
+ spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
+ spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
+ debug("spl: payload xipImage, load addr: 0x%lx\n",
+ spl_image->load_addr);
+ return 0;
+ }
+#endif
+ return(spl_parse_image_header(spl_image, (const struct image_header *)
+ CONFIG_SYS_UBOOT_BASE));
+}
+SPL_LOAD_IMAGE_METHOD("XIP", 0, BOOT_DEVICE_XIP, spl_xip);