[U-Boot] [PATCH] tools: imximage: Load a size that is multiple of 512

[Fabio Estevam]

In order to mx53 ROM to properly load the U-boot image, its size should be
multiple of 512 bytes.

This issue was observed on gcc 4.6.2/4.7.3 which caused data aborts:

U-Boot 2013.01-rc2-00172-gf8cfcf1-dirty (Dec 26 2012 - 13:13:28)

Board: MX53 LOCO
I2C:   ready
DRAM:  1 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:    serial
Out:   serial
Err:   serial
CPU:   Freescale i.MX53 family rev2.1 at 1000 MHz
Reset cause: WDOG
Net:   FEC
Warning: FEC using MAC address from net device

Hit any key to stop autoboot:  0
data abort

    MAYBE you should read doc/README.arm-unaligned-accesses

pc : [<aff72220>]          lr : [<aff721fc>]
sp : af565e20  ip : af566918     fp : 00000000
r10: 00000003  r9 : affabb5b     r8 : af565f58
r7 : 00000000  r6 : 36747fff     r5 : af5668e8  r4 : 36747fff
r3 : af5668ec  r2 : af5668eb     r1 : 00000000  r0 : af5668e8
Flags: NzcV  IRQs off  FIQs off  Mode SVC_32
Resetting CPU ...

resetting ...

,and this patch fixes it.

Signed-off-by: Troy Kisky <troy.kisky at boundarydevices.com>
Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
 include/image.h  |    3 +++
 tools/imximage.c |    9 ++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/image.h b/include/image.h
index f54d983..e1e83b4 100644
--- a/include/image.h
+++ b/include/image.h
@@ -179,6 +179,9 @@
 #define IH_MAGIC	0x27051956	/* Image Magic Number		*/
 #define IH_NMLEN		32	/* Image Name Length		*/
 
+/* Reused from common.h */
+#define ROUND(a, b)		(((a) + (b) - 1) & ~((b) - 1))
+
 /*
  * Legacy format image header,
  * all data in network byte order (aka natural aka bigendian).
diff --git a/tools/imximage.c b/tools/imximage.c
index 63f88b6..a93d7eb 100644
--- a/tools/imximage.c
+++ b/tools/imximage.c
@@ -515,7 +515,14 @@ static void imximage_set_header(void *ptr, struct stat *sbuf, int ifd,
 
 	/* Set the imx header */
 	(*set_imx_hdr)(imxhdr, dcd_len, params->ep, imxhdr->flash_offset);
-	*header_size_ptr = sbuf->st_size + imxhdr->flash_offset;
+
+	/*
+	 * ROM bug alert
+	 * mx53 only loads 512 byte multiples.
+	 * The remaining fraction of a block bytes would
+	 * not be loaded.
+	 */
+	*header_size_ptr = ROUND(sbuf->st_size + imxhdr->flash_offset, 512);
 }
 
 int imximage_check_params(struct mkimage_params *params)
-- 
1.7.9.5