From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH] ARM: stm32mp: add bootm handler for images
Date: Tue, 1 Oct 2019 17:18:08 +0200 [thread overview]
Message-ID: <20191001151808.25187-1-a.fatoum@pengutronix.de> (raw)
STM32 images are preceded by a fixed-size 256 byte header, which is
interpreted by the TF-A first stage bootloader and isn't executable
as ARM code.
To maintain the ability to network boot them, add a bootm handler that
skips the header.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
arch/arm/mach-stm32mp/Makefile | 2 +-
arch/arm/mach-stm32mp/stm32image.c | 50 ++++++++++++++++++++++++++++++
2 files changed, 51 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/mach-stm32mp/stm32image.c
diff --git a/arch/arm/mach-stm32mp/Makefile b/arch/arm/mach-stm32mp/Makefile
index 16a218658ade..204cad608f56 100644
--- a/arch/arm/mach-stm32mp/Makefile
+++ b/arch/arm/mach-stm32mp/Makefile
@@ -1 +1 @@
-obj- := __dummy__.o
+obj-$(CONFIG_BOOTM) := stm32image.o
diff --git a/arch/arm/mach-stm32mp/stm32image.c b/arch/arm/mach-stm32mp/stm32image.c
new file mode 100644
index 000000000000..84975c5c3bf1
--- /dev/null
+++ b/arch/arm/mach-stm32mp/stm32image.c
@@ -0,0 +1,50 @@
+#define pr_fmt(fmt) "stm32image: " fmt
+
+#include <bootm.h>
+#include <common.h>
+#include <init.h>
+#include <memory.h>
+#include <linux/sizes.h>
+
+#define BAREBOX_STAGE2_OFFSET 256
+
+static int do_bootm_stm32image(struct image_data *data)
+{
+ void (*barebox)(void);
+ resource_size_t start, end;
+ int ret;
+
+ ret = memory_bank_first_find_space(&start, &end);
+ if (ret)
+ return ret;
+
+ ret = bootm_load_os(data, start);
+ if (ret)
+ return ret;
+
+ barebox = (void*)start + BAREBOX_STAGE2_OFFSET;
+
+ if (data->verbose)
+ printf("Loaded barebox image to 0x%08lx\n",
+ (unsigned long)barebox);
+
+ shutdown_barebox();
+
+ barebox();
+
+ return -EIO;
+}
+
+static struct image_handler image_handler_stm32_image_v1_handler = {
+ .name = "STM32 image (v1)",
+ .bootm = do_bootm_stm32image,
+ .filetype = filetype_stm32_image_v1,
+};
+
+static int stm32mp_register_stm32image_image_handler(void)
+{
+ register_image_handler(&image_handler_stm32_image_v1_handler);
+
+ return 0;
+}
+late_initcall(stm32mp_register_stm32image_image_handler);
--
2.23.0
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next reply other threads:[~2019-10-01 15:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-01 15:18 Ahmad Fatoum [this message]
2019-10-02 7:57 ` Sascha Hauer
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