[PATCH 1/1] board: ae350: Support autoboot from RAM

[Rick Chen]

> From: Leo Yu-Chi Liang(梁育齊) <ycliang at andestech.com>
> Sent: Thursday, November 04, 2021 9:53 AM
> To: u-boot at lists.denx.de
> Cc: Rick Jian-Zhi Chen(陳建志) <rick at andestech.com>; Leo Yu-Chi Liang(梁育齊) <ycliang at andestech.com>
> Subject: [PATCH 1/1] board: ae350: Support autoboot from RAM
>
> Add boot command "bootcmd_ram" to support autoboot from RAM.
>
> This feature could be useful at the very initial state of chip design when there is only a minimal set of peripheral. (e.g. without mmc and mac ..etc)
>
> The kernel image is default to be loaded at 0x2000000 via debug port, and the following script serves as an example:
>
> spl()
> {
>         cmd="riscv64-linux-gdb -q \
>         -ex \"target remote $host:$port\" \
>         -ex \"load\" \
>         -ex \"thread apply all set \\\$pc=&_start\" \
>         -ex \"thread apply all set \\\$a0=\\\$mhartid\" \
>         -ex \"thread apply all set \\\$a1=<dtb address>\" \
>         -ex \"restore u-boot.itb binary 0x200000\" \
>         -ex \"restore Image binary 0x2000000\" \
>         -ex \"c\" \
>         spl/u-boot-spl
>         "
>
>         echo $cmd
>         eval $cmd
> }
>
> The address where the kernel is loaded can be altered by changing the value of KERNEL_IMAGE_ADDR.
>
> Signed-off-by: Leo Yu-Chi Liang <ycliang at andestech.com>
> ---
>  include/configs/ax25-ae350.h | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)

Reviewed-by: Rick Chen <rick at andestech.com>