Hi Nick

First, i share that i'm reviewing TF-M v2.3.0 with tag https://review.trustedfirmware.org/plugins/gitiles/TF-M/trusted-firmware-m/+...;

In the shared commit, platform/ext/target/arm/rse/neoverse_rd/rdv3/bl2/boot_hal_bl2.c call atu_rse_drv_init() in boot_platform_post_init() like below.

int32_t boot_platform_post_init(void) {     int32_t result;     enum atu_error_t atu_err;

    result = rse_sam_init(RSE_SAM_INIT_SETUP_FULL);     if (result != 0) {         return result;     }

    atu_err = atu_rse_drv_init(&ATU_DEV_S, ATU_DOMAIN_ROOT, atu_regions_static, atu_stat_count);     if (atu_err != ATU_ERR_NONE) {             return result;     }

But, atu_rse_drv_init don't be called in platform/ext/target/arm/rse/neoverse_rd/rdv3r1/bl2/boot_hal_bl2.c anywhere.

So, i tried to find ATU setting to other sources in RDV3R1 platform, i couldn't find ATU setting to load post image.

Is there any codes setting ATU for each processor region that image will be loaded?

Best Regards RH Kim ----- 원본 메시지 ----- 보낸 사람: Nicola Mazzucato <Nicola.Mazzucato@arm.com> 받는 사람: tf-m@lists.trustedfirmware.org <tf-m@lists.trustedfirmware.org>,김륜현 <winxp4333@adtek.co.kr> 날짜: 2026-05-13 17:01:37 제목: Re: [TF-M] no ATU setting in RDV3r1 with TF-M v2.3.0

Thanks RH Kim,

The commit you shared did not remove any ATU initialisations from what I see. To understand better, are you working on a branch or old commit where you see atu_rse_drv_init for RDV3R1? If so, can you please share?

I'm also not very familiar with that platform so it's likely I'm missing something, though it seems that the platform_post_init sequence is different from RDV3.

Thanks Best regards, Nick

From: 김륜현 via TF-M <tf-m@lists.trustedfirmware.org> Sent: 13 May 2026 03:16 To: tf-m@lists.trustedfirmware.org <tf-m@lists.trustedfirmware.org> Subject: [TF-M] no ATU setting in RDV3r1 with TF-M v2.3.0  

Dear all, i'm developing the RSE firmware based on rdv3r1.

I'm reviewing TF-M v2.3.0 was recently released for checking difference our project codes.

Among many differences, i discovered missing ATU settings to load post processor images.

In the similar platform rdv3, it calls atu_rse_drv_init() at boot_platform_post_init().  But rdv3r1 doesn't call atu_rse_drv_init() also i can't found ATU settings to load post images in BL2.

Is there any intentions?

Or was it just missing while integrating by this commit https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/39562?

Please check it 

Best Regards RH Kim