[U-Boot] [PATCH] u-boot: align cache flushes in load_elf_image_shdr to line boundaries

[Neil Stainton]

Prevent cache warning messages when using the 'bootelf' command on an Arm target. Round down each section start address and round up the respective section end to the nearest cache line.

---
Currently when using bootelf to load an image on Arm, several warnings such as the following appear in the console:
  CACHE: Misaligned operation at range [87800000, 8783c5e0]
  CACHE: Misaligned operation at range [8783c5e0, 8784b3e0]

Signed-off-by: Neil Stainton <nstainton at asl-control.co.uk>

---
 cmd/elf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cmd/elf.c b/cmd/elf.c
index eafea38..1199e5d 100644
--- a/cmd/elf.c
+++ b/cmd/elf.c
@@ -141,7 +141,9 @@ static unsigned long load_elf_image_shdr(unsigned long addr)
                        memcpy((void *)(uintptr_t)shdr->sh_addr,
                               (const void *)image, shdr->sh_size);
                }
-               flush_cache(shdr->sh_addr, shdr->sh_size);
+               flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
+                       roundup((shdr->sh_addr + shdr->sh_size), ARCH_DMA_MINALIGN) -
+                               rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
        }
 
        return ehdr->e_entry;
-- 
2.7.4