Hi Heiko,
On 03/24/2017 07:41 AM, Heiko Stuebner wrote:
Building sd images for rk3188 requires more steps due to the needed split into TPL and SPL as loaders. Describe how to build an image for it in a separate paragraph in the READER.rockchip file.
Signed-off-by: Heiko Stuebner heiko@sntech.de
doc/README.rockchip | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/doc/README.rockchip b/doc/README.rockchip index 186a1a007e..cb81efd4bf 100644 --- a/doc/README.rockchip +++ b/doc/README.rockchip @@ -147,6 +147,32 @@ For evb_rk3036 board: Note: rk3036 SDMMC and debug uart use the same iomux, so if you boot from SD, the debug uart must be disabled
+Booting from an SD card on RK3188 +=================================
+For rk3188 boards the general storage onto the card stays the same as +described above, but the image creation needs a bit more care.
+The bootrom of rk3188 expects to find a small 1kb loader which returns +control to the bootrom, after which it will load the real loader, which +can then be up to 29kb in size and does the regular ddr init.
+Additionally the rk3188 requires everything the bootrom loads to be +rc4-encrypted. Except for the very first stage the bootrom always reads +and decodes 2kb pages, so files should be sized accordingly.
+# copy tpl, pad to 1020 bytes and append spl +cat tpl/u-boot-tpl.bin > tplspl.bin +truncate -s 1020 tplspl.bin +cat spl/u-boot-spl.bin >> tplspl.bin +tools/mkimage -n rk3188 -T rksd -d tplspl.bin out
+# truncate, encode and append u-boot.bin +truncate -s %2048 u-boot.bin +cat u-boot.bin | split -b 512 --filter='openssl rc4 -K 7C4E0304550509072D2C7B38170D1711' >> out
Using fastboot on rk3288
- Write GPT partition layout to mmc device which fastboot want to use it to
Reviewed-by: Kever Yang kever.yang@rock-chips.com
Thanks, - Kever