[PATCH v2 47/71] bootstd: Include the device tree in the bootflow

[Simon Glass]

Some bootmeths provide a way to load a device tree as well as the base
OS image. Add a way to store this in the bootflow. Update the
'bootflow info' command to show this information.

Note that the device tree is not allocated, but instead is stored at
an address provided by an environment variable. This may need to be
adjusted at some point, but for now it works well and fits in with the
existing distro-boot scripts.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v1)

 boot/bootflow.c      | 1 +
 cmd/bootflow.c       | 6 ++++++
 include/bootflow.h   | 6 ++++++
 test/boot/bootflow.c | 1 +
 4 files changed, 14 insertions(+)

diff --git a/boot/bootflow.c b/boot/bootflow.c
index 0345755f58f..52cc2f9d548 100644
--- a/boot/bootflow.c
+++ b/boot/bootflow.c
@@ -355,6 +355,7 @@ void bootflow_free(struct bootflow *bflow)
 	free(bflow->fname);
 	free(bflow->buf);
 	free(bflow->os_name);
+	free(bflow->fdt_fname);
 }
 
 void bootflow_remove(struct bootflow *bflow)
diff --git a/cmd/bootflow.c b/cmd/bootflow.c
index 2b6ed26fdcb..56dd35b69cf 100644
--- a/cmd/bootflow.c
+++ b/cmd/bootflow.c
@@ -344,6 +344,12 @@ static int do_bootflow_info(struct cmd_tbl *cmdtp, int flag, int argc,
 		printf("Logo size: %x (%d bytes)\n", bflow->logo_size,
 		       bflow->logo_size);
 	}
+	printf("FDT:       %s\n", bflow->fdt_fname);
+	if (bflow->fdt_fname) {
+		printf("FDT size:  %x (%d bytes)\n", bflow->fdt_size,
+		       bflow->fdt_size);
+		printf("FDT addr:  %lx\n", bflow->fdt_addr);
+	}
 	printf("Error:     %d\n", bflow->err);
 	if (dump && bflow->buf) {
 		/* Set some sort of maximum on the size */
diff --git a/include/bootflow.h b/include/bootflow.h
index 8ff9e332b1f..bf71b09edad 100644
--- a/include/bootflow.h
+++ b/include/bootflow.h
@@ -60,6 +60,9 @@ enum bootflow_state_t {
  * @err: Error number received (0 if OK)
  * @os_name: Name of the OS / distro being booted, or NULL if not known
  *	(allocated)
+ * @fdt_fname: Filename of FDT file
+ * @fdt_size: Size of FDT file
+ * @fdt_addr: Address of loaded fdt
  */
 struct bootflow {
 	struct list_head bm_node;
@@ -79,6 +82,9 @@ struct bootflow {
 	int size;
 	int err;
 	char *os_name;
+	char *fdt_fname;
+	int fdt_size;
+	ulong fdt_addr;
 };
 
 /**
diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c
index f852b6e9b6f..b71ec52eb7a 100644
--- a/test/boot/bootflow.c
+++ b/test/boot/bootflow.c
@@ -199,6 +199,7 @@ static int bootflow_cmd_info(struct unit_test_state *uts)
 	ut_assert_nextline("Size:      253 (595 bytes)");
 	ut_assert_nextline("OS:        Fedora-Workstation-armhfp-31-1.9 (5.3.7-301.fc31.armv7hl)");
 	ut_assert_nextline("Logo:      (none)");
+	ut_assert_nextline("FDT:       <NULL>");
 	ut_assert_nextline("Error:     0");
 	ut_assert_console_end();
 
-- 
2.39.0.314.g84b9a713c41-goog