diff options
author | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-04-17 17:48:04 +0200 |
---|---|---|
committer | Simon Glass <sjg@chromium.org> | 2017-05-10 13:37:21 -0600 |
commit | a1a2dfb87038faffdaa6e15b757a47e3a2f70ee5 (patch) | |
tree | 2d776b4d9f9dc3f13770f0ca3fca1da5aad97e6e /tools/rkcommon.c | |
parent | c25b8c3af108019303364bc304a80e3f83209dc6 (diff) |
rockchip: mkimage: clarify header0 initialisation
This change set adds documentation to the header0 initialisation and
improves readability for the calculations of various offsets/lengths.
As the U-Boot SPL stage doesn't use any payload beyond what is covered
by init_size, we no longer add RK_MAX_BOOT_SIZE to init_boot_size.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'tools/rkcommon.c')
-rw-r--r-- | tools/rkcommon.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/tools/rkcommon.c b/tools/rkcommon.c index 1880fef524..f826001118 100644 --- a/tools/rkcommon.c +++ b/tools/rkcommon.c @@ -13,6 +13,8 @@ #include "mkimage.h" #include "rkcommon.h" +#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) + enum { RK_SIGNATURE = 0x0ff0aa55, }; @@ -160,9 +162,21 @@ static void rkcommon_set_header0(void *buf, uint file_size, hdr->disable_rc4 = !rkcommon_need_rc4_spl(params); hdr->init_offset = RK_INIT_OFFSET; - hdr->init_size = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE; - hdr->init_size = (hdr->init_size + 3) & ~3; - hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE; + hdr->init_size = DIV_ROUND_UP(file_size, RK_BLK_SIZE); + /* + * The init_size has to be a multiple of 4 blocks (i.e. of 2K) + * or the BootROM will not boot the image. + * + * Note: To verify that this is not a legacy constraint, we + * rechecked this against the RK3399 BootROM. + */ + hdr->init_size = ROUND(hdr->init_size, 4); + /* + * The images we create do not contain the stage following the SPL as + * part of the SPL image, so the init_boot_size (which might have been + * read by Rockchip's miniloder) should be the same as the init_size. + */ + hdr->init_boot_size = hdr->init_size; rc4_encode(buf, RK_BLK_SIZE, rc4_key); } |