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[06/10] xilinx: zynqmp: Check that DT is 64bit aligned

Message ID 98ca061e3d0a5a1aebe4facbb2dbb485a126839e.1629704273.git.michal.simek@xilinx.com
State Accepted
Commit 5bd5ee02b23be2062c5e0c194355534eaa7e7854
Delegated to: Michal Simek
Headers show
Series xilinx: Add support for DTB reselection | expand

Commit Message

Michal Simek Aug. 23, 2021, 7:37 a.m. UTC 
DT needs to be 64bit aligned. If it is not fdt64_to_cpu will fail when try
to read information about reserved memory. The system ends in exception
without any clue what's going it. That's why detect not aligned DT and
panic to show where the issue is coming from.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

Changes in v2: None

 board/xilinx/zynqmp/zynqmp.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index e43177ea4e48..ea15e62eb21e 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -470,6 +470,9 @@  ulong board_get_usable_ram_top(ulong total_size)
 	phys_addr_t reg;
 	struct lmb lmb;
 
+	if (!IS_ALIGNED((ulong)gd->fdt_blob, 0x8))
+		panic("Not 64bit aligned DT location: %p\n", gd->fdt_blob);
+
 	/* found enough not-reserved memory to relocated U-Boot */
 	lmb_init(&lmb);
 	lmb_add(&lmb, gd->ram_base, gd->ram_size);