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| author | Xu Ziyuan <xzy.xu@rock-chips.com> | 2016-07-12 19:09:49 +0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-07-25 20:44:18 -0600 |
| commit | b47ea79219f1de43fa21456c6c60c8390b8755d2 (patch) | |
| tree | 7639d25c4dba2ed0fc87bd153111ba33a1dc2fa7 /doc/README.rockchip | |
| parent | 4579720412744dd13266a3505bb38ce2da819b4f (diff) | |
| download | u-boot-b47ea79219f1de43fa21456c6c60c8390b8755d2.tar.gz | |
rockchip: add option to change method of loading u-boot
If we would like to boot from SD card, we have to implement mmc driver
in SPL stage, and get a slightly large SPL binary. Rockchip SoC's
bootrom code has the ability to load spl and u-boot, then boot.
If CONFIG_ROCKCHIP_SPL_BACK_TO_BROM is enabled, the spl will return to
bootrom in board_init_f(), then bootrom loads u-boot binary.
Loading sequence after rework:
bootrom ==> spl ==> bootrom ==> u-boot
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fixed up spelling of U-Boot, boorom, opinion->option, Rochchip:
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc/README.rockchip')
| -rw-r--r-- | doc/README.rockchip | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/README.rockchip b/doc/README.rockchip index e0572c80b9..182e3aedf6 100644 --- a/doc/README.rockchip +++ b/doc/README.rockchip @@ -119,6 +119,20 @@ something like: Hit any key to stop autoboot: 0 => +The rockchip bootrom can load and boot an initial spl, then continue to +load a second-level bootloader(ie. U-BOOT) as soon as it returns to bootrom. +Therefore RK3288 has another loading sequence like RK3036. The option of +U-Boot is controlled with this setting in U-Boot: + + #define CONFIG_ROCKCHIP_SPL_BACK_TO_BROM + +You can create the image via the following operations: + + ./firefly-rk3288/tools/mkimage -n rk3288 -T rksd -d \ + firefly-rk3288/spl/u-boot-spl-dtb.bin out && \ + cat firefly-rk3288/u-boot-dtb.bin >> out && \ + sudo dd if=out of=/dev/sdc seek=64 + If you have an HDMI cable attached you should see a video console. For evb_rk3036 board: |