[PATCH 3/6] spl: fit: rework the FDT load hack

[Francesco Valla]

U-Boot proper expects its FDT to be right after its binary image; the
"full" FIT image loader thus adopts an hack to relocate it, ignoring
the specified load address.

Rework the current form of the hack to:

- support the 'sandbox' environment with a sysmem-aware memcpy;
- use the ALIGN() macro instead of raw alignment logic;
- align the FDT to 8-byte boundary as per FDT specifications;
- fix the debug print (which was reporting the source address for the
  relocation instead of the destination one).

Signed-off-by: Francesco Valla <francesco at valla.it>
---
 common/spl/spl_fit.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c
index 229eda0582f1..1f3f7e549502 100644
--- a/common/spl/spl_fit.c
+++ b/common/spl/spl_fit.c
@@ -1000,14 +1000,15 @@ int spl_load_fit_image(struct spl_image_info *spl_image,
 			     &fit_uname_config, IH_ARCH_DEFAULT, IH_TYPE_FLATDT,
 			     -1, FIT_LOAD_OPTIONAL, &dt_data, &dt_len);
 	if (ret >= 0) {
-		spl_image->fdt_addr = (void *)dt_data;
-
 		if (spl_image->os == IH_OS_U_BOOT) {
 			/* HACK: U-Boot expects FDT at a specific address */
-			fdt_hack = spl_image->load_addr + spl_image->size;
-			fdt_hack = (fdt_hack + 3) & ~3;
-			debug("Relocating FDT to %p\n", spl_image->fdt_addr);
-			memcpy((void *)fdt_hack, spl_image->fdt_addr, dt_len);
+			fdt_hack = ALIGN(spl_image->load_addr + spl_image->size, 8);
+			debug("Relocating FDT to %p\n", (void *)fdt_hack);
+			memcpy(map_sysmem(fdt_hack, dt_len),
+			       map_sysmem(dt_data, 0), dt_len);
+			spl_image->fdt_addr = (void *)fdt_hack;
+		} else {
+			spl_image->fdt_addr = (void *)dt_data;
 		}
 	}
 

-- 
2.54.0