Hello Michael,
On 4/30/25 23:27, Michael Grzeschik wrote:
> In MX93 the ELE (Edge Lock Enclave) is limited to communicate with
> messages addressed under 1.5GB. The ELE can not reach the memory between
> (0xE0000000-0xFFFFFFFF).
>
> So we limit the usable memory in case OPTEE is used.
>
> Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>
> ---
> arch/arm/mach-imx/esdctl.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm/mach-imx/esdctl.c b/arch/arm/mach-imx/esdctl.c
> index 701ca0ac1f3..79f697d6288 100644
> --- a/arch/arm/mach-imx/esdctl.c
> +++ b/arch/arm/mach-imx/esdctl.c
> @@ -589,6 +589,15 @@ resource_size_t imx9_ddrc_sdram_size(void)
> mem += memory_sdram_size(cols, rows, banks, width);
> }
>
> + /* In MX93 the ELE is limited to comunicate with messages
> + * under 1.5GB address space. This limits the overal memory
> + * to be 1GB in case OPTEE is used.
> + */
> + if (IS_ENABLED(CONFIG_PBL_OPTEE)) {
> + if (mem > 0x40000000)
> + mem = 0x40000000;
> + }
Doesn't this affect the memory detected in barebox proper as well?
I think you want to add this to imx93_barebox_entry() only.
Cheers,
Ahmad
> +
> return mem;
> }
>
>
> ---
> base-commit: 873b572763d38ab4100d218d0a3614f79b596077
> change-id: 20250430-imx9optee-31d2dfc926bf
>
> Best regards,
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