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rockchip: Drop first 32kb of zeros from the rkSD image type 

Instead of creating a rockchip SPL SD card image with 32KB of zeros
which can be written to the start of an SD card, create the images with
only the useful data that should be written to an offset of 32KB on the
SD card.

The first 32 kilobytes aren't needed for bootup and only serve as
convenient way of accidentally obliterating your partition table.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sjoerd Simons 2015-08-30 16:55:50 -06:00 committed by Simon Glass
parent 81b0618ddf
commit dd39bcaffb
2 changed files with 3 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
doc/README.rockchip
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@ -90,7 +90,7 @@ Booting from an SD card
To write an image that boots from an SD card (assumed to be /dev/sdc):
./firefly-rk3288/tools/mkimage -T rksd -d firefly-rk3288/spl/u-boot-spl-dtb.bin out
sudo dd if=out of=/dev/sdc
sudo dd if=out of=/dev/sdc seek=64
sudo dd if=firefly-rk3288/u-boot-dtb.img of=/dev/sdc seek=256
This puts the Rockchip header and SPL image first and then places the U-Boot

9
tools/rksd.c
View File

@ -14,9 +14,7 @@
#include "rkcommon.h"
enum {
RKSD_HEADER0_START = 64 * RK_BLK_SIZE,
RKSD_SPL_HDR_START = RKSD_HEADER0_START +
RK_CODE1_OFFSET * RK_BLK_SIZE,
RKSD_SPL_HDR_START = RK_CODE1_OFFSET * RK_BLK_SIZE,
RKSD_SPL_START = RKSD_SPL_HDR_START + 4,
RKSD_HEADER_LEN = RKSD_SPL_START,
};
@ -44,11 +42,8 @@ static void rksd_set_header(void *buf, struct stat *sbuf, int ifd,
unsigned int size;
int ret;
/* Zero the whole header. The first 32KB is empty */
memset(buf, '\0', RKSD_HEADER0_START);
size = params->file_size - RKSD_SPL_HDR_START;
ret = rkcommon_set_header(buf + RKSD_HEADER0_START, size);
ret = rkcommon_set_header(buf, size);
if (ret) {
/* TODO(sjg@chromium.org): This method should return an error */
printf("Warning: SPL image is too large (size %#x) and will not boot\n",