[U-Boot] [RFC PATCH 05/11] spl: support booting via RISC-V OpenSBI

[Bin Meng]

On Mon, Jul 22, 2019 at 2:00 AM Lukas Auer
<lukas.auer at aisec.fraunhofer.de> wrote:
>
> RISC-V OpenSBI is an open-source implementation of the RISC-V Supervisor
> Binary Interface (SBI) specification. It is required by Linux and U-Boot
> running in supervisor mode. This patch adds support for booting via the
> OpenSBI FW_DYNAMIC firmware.
>
> In this configuration, U-Boot SPL starts in machine mode. After loading
> OpenSBI and U-Boot proper, it will start OpenSBI. All necessary
> parameters are generated by U-Boot SPL and passed to OpenSBI. U-Boot
> proper is started in supervisor mode by OpenSBI. Support for OpenSBI is
> enabled with CONFIG_SPL_OPENSBI. An additional configuration entry,
> CONFIG_SPL_OPENSBI_LOAD_ADDR, is used to specify the load address of the
> OpenSBI firmware binary. It is not used directly in U-Boot and instead
> is intended to make the value available to scripts such as FIT
> configuration generators.
>
> The header file include/opensbi.h is based on header files from the
> OpenSBI project. They are recent, as of commit bae54f764570 ("firmware:
> Add fw_dynamic firmware").
>
> Signed-off-by: Lukas Auer <lukas.auer at aisec.fraunhofer.de>
> ---
>
>  common/image.c           |  1 +
>  common/spl/Kconfig       | 17 ++++++++
>  common/spl/Makefile      |  1 +
>  common/spl/spl.c         |  6 +++
>  common/spl/spl_opensbi.c | 85 ++++++++++++++++++++++++++++++++++++++++
>  include/image.h          |  1 +
>  include/opensbi.h        | 40 +++++++++++++++++++
>  include/spl.h            |  5 +++
>  8 files changed, 156 insertions(+)
>  create mode 100644 common/spl/spl_opensbi.c
>  create mode 100644 include/opensbi.h
>

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Tested-by: Bin Meng <bmeng.cn at gmail.com>