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 ---
board/xilinx/zynqmp/zynqmp.c | 3 +++ 1 file changed, 3 insertions(+)
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);