On Thu, Jun 23, 2016 at 07:57:13AM -0600, Simon Glass wrote:
Hi Andreas,
On 20 June 2016 at 21:34, Andreas Dannenberg dannenberg@ti.com wrote:
From: Daniel Allred d-allred@ti.com
The next stage boot loader image and the selected FDT can be post-processed by board/platform/device-specific code, which can include modifying the size and altering the starting source address before copying these binary blobs to their final desitination. This might be desired to do things like strip headers or footers attached to the images before they were packeaged into the FIT, or to perform operations such as decryption or authentication.
Signed-off-by: Daniel Allred d-allred@ti.com Signed-off-by: Andreas Dannenberg dannenberg@ti.com
common/spl/spl_fit.c | 21 ++++++++++++++++----- include/image.h | 15 +++++++++++++++ 2 files changed, 31 insertions(+), 5 deletions(-)
diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c index 9874708..ecbcb97 100644 --- a/common/spl/spl_fit.c +++ b/common/spl/spl_fit.c @@ -121,6 +121,10 @@ static int get_aligned_image_size(struct spl_load_info *info, int data_size, return (data_size + info->bl_len - 1) / info->bl_len; }
+void __weak board_fit_image_post_process(void **p_src, size_t *p_size) +{ +}
Can you make this a Kconfig option instead of a weak function? It's hard enough to trace what a particular board is doing...
Hi Simon, I understand your point and we did look into doing it but could not come up with a good way (certainly I don't want to clutter this global file with any TI stuff) but maybe we were over-thinking it :)
So (roughly) how would you like to see this Kconfig option to be implemented? I'll be happy to change the implementation if given a little direction.
Thanks, Andreas
int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) { int sectors; @@ -132,7 +136,7 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) int data_offset, data_size; int base_offset, align_len = ARCH_DMA_MINALIGN - 1; int src_sector;
void *dst;
void *dst, *src; /* * Figure out where the external images start. This is the base for the@@ -206,8 +210,11 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) return -EIO; debug("image: dst=%p, data_offset=%x, size=%x\n", dst, data_offset, data_size);
memcpy(dst, dst + get_aligned_image_overhead(info, data_offset),data_size);
src = dst + get_aligned_image_overhead(info, data_offset);board_fit_image_post_process((void **)&src, (size_t *)&data_size);memcpy(dst, src, data_size); /* Figure out which device tree the board wants to use */ fdt_len = spl_fit_select_fdt(fit, images, &fdt_offset);@@ -236,8 +243,12 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) */ debug("fdt: dst=%p, data_offset=%x, size=%x\n", dst, fdt_offset, fdt_len);
memcpy(load_ptr + data_size,dst + get_aligned_image_overhead(info, fdt_offset), fdt_len);
src = dst + get_aligned_image_overhead(info, fdt_offset);dst = load_ptr + data_size;board_fit_image_post_process((void **)&src, (size_t *)&fdt_len);memcpy(dst, src, fdt_len); return 0;} diff --git a/include/image.h b/include/image.h index a8f6bd1..9536874 100644 --- a/include/image.h +++ b/include/image.h @@ -1172,4 +1172,19 @@ ulong android_image_get_kload(const struct andr_img_hdr *hdr); */ int board_fit_config_name_match(const char *name);
+/**
- board_fit_image_post_process() - Do any post-process on FIT binary data
- This is used to do any sort of image manipulation, verification, decryption
- etc. in a platform or board specific way. Obviously, anything done here would
- need to be comprehended in how the images were prepared before being injected
- into the FIT creation (i.e. the binary blobs would have been pre-processed
- before being added to the FIT image).
- @image: pointer to the image start pointer
- @size: pointer to the image size
- @return no return value (failure should be handled internally)
- */
+void board_fit_image_post_process(void **p_image, size_t *p_size);
#endif /* __IMAGE_H__ */
2.6.4
Regards, Simon