[U-Boot] [PATCH v3 5/9] pico-imx7d: Reserve region of memory to OPTEE

[Peng Fan]

> Subject: [PATCH v3 5/9] pico-imx7d: Reserve region of memory to OPTEE
> 
> Subtracts CONFIG_OPTEE_TZDRAM_SIZE from the available DRAM size so
> that the OPTEE memory is not override during u-boot relocation.
> 
> Note the OPTEE boot process will itself subtract the DRAM region it lives in
> from the memory map passed to Linux.
> 
> Signed-off-by: Jun Nie <jun.nie at linaro.org>
> ---
>  board/technexion/pico-imx7d/pico-imx7d.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/board/technexion/pico-imx7d/pico-imx7d.c
> b/board/technexion/pico-imx7d/pico-imx7d.c
> index 53e1469..7c9e145 100644
> --- a/board/technexion/pico-imx7d/pico-imx7d.c
> +++ b/board/technexion/pico-imx7d/pico-imx7d.c
> @@ -60,6 +60,11 @@ int dram_init(void)
>  {
>  	gd->ram_size = imx_ddr_size();
> 
> +	/* Subtract the defined OPTEE runtime firmware length */ #ifdef
> +CONFIG_OPTEE_TZDRAM_SIZE
> +		gd->ram_size -= CONFIG_OPTEE_TZDRAM_SIZE; #endif
> +
Better describe that OP-TEE runs at the top of DRAM. Actually the best
method should be modify dram banks, because OP-TEE not always
runs at top DRAM. Since this is pico board specific, so

Reviewed-by: Peng Fan <peng.fan at nxp.com>

Regards,
Peng.

>  	return 0;
>  }
> 
> --
> 2.7.4