On 05/18/2017 11:49 AM, Vikas Manocha wrote:
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.
Awesome. I've had to hack u-boot before to achieve exactly this. It's
nice to have a proper implementation.
[snip]
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c
b/board/st/stm32f746-disco/stm32f746-disco.c
index 4f2b677..e330b1f 100644
--- a/board/st/stm32f746-disco/stm32f746-disco.c
+++ b/board/st/stm32f746-disco/stm32f746-disco.c
@@ -91,6 +91,7 @@ int board_early_init_f(void)
#endif
#ifdef CONFIG_SPL_BUILD
+
Unrelated change.
[snip]
diff --git a/common/spl/spl_xip.c b/common/spl/spl_xip.c
new file mode 100644
index 0000000..50e2f34
--- /dev/null
+++ b/common/spl/spl_xip.c
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2017 Vikas Manocha <vikas.mano...@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;
+#ifdef CONFIG_CPU_V7M
This looks like it should be handled by spl_set_header_raw_uboot(). I
don't see other SPL loaders do this.
+ spl_image->entry_point |= 0x1;
+#endif
+ 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);
Alex
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