From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-04.galae.net (smtpout-04.galae.net [185.171.202.116]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8083F4A9D49; Mon, 21 Sep 2026 14:53:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.171.202.116 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790002431; cv=none; b=urz1qqx+qx/PP3rUOmCxFE0JMLiJIXYVAbDmXerFwvZ08FEJOWuMNjUUNpI6TzITRa53+AcVgqHt/0g3IQmJFqerlsVZPPSG2QBPazQUcq3hvL9tEyuhGm1LMGINrPCqULJu8213l8UrhcupHom9Pd/de8NJ9ZF/Bzbi87804ZY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790002431; c=relaxed/simple; bh=fNgI8dSAL/QSamBcLWF2pCT0hdNYcmEfkDleWfFn9pk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=olvcka1wx4G0FQV0byJM8akGXO3EIRzuHBiwTAakSeW9OJLLsC3xRnPq150lEUfwx0jjySRReDEvBC+jJ4wyD4IVEg0C9lM7nl1dmx7qO/QPlqj/UOfZul2h8I+AdFNTuQUYDWmtFly7LpoOxo4fZoMrXnYNx+DTQQ6Tw8WbPok= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=wjKH0kKw; arc=none smtp.client-ip=185.171.202.116 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="wjKH0kKw" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id CDBA5C23D92; Mon, 21 Sep 2026 14:54:33 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id A84CB5FFB2; Mon, 21 Sep 2026 14:53:47 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id AA64210329195; Mon, 21 Sep 2026 16:53:44 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1790002426; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=bqWTaa9P4726wAp8OdJXg008Zn0xKz5pVT9+3dq+cYU=; b=wjKH0kKwXUoTKdXHzriac92HdpU2dj8rCvbyOgJMh6fKpxDTH4GPexupJy9Y6HwXFysMvS 1Ox9sbBVk1YzqZ1hjrgRurFpOLgT4sARPhxZ2wzuQrwbmfDC5qUI2zs/bNJ5UI+8XG+UGn Vh8gwiU1pHmeFt/8SOZ5chWRcMPsL2NSRbJcmVRnKcc+M6C7IUh9JGEe0HDa3ZRkRrjG9R nF3QWgAnTguWT1ve1HZ3baBMJlZiDzD+V0cQJuoXhj3P5YI9BE3QC0E+u9yu5pAlKqcBF+ UAf5m2hUDeHzS1AWYssqXNKBiG3pXVZtyLHpP7R72xnPeylio00aVAwDHr5wxw== From: "Richard Genoud (TI)" To: Nishanth Menon , Vignesh Raghavendra Cc: Tero Kristo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Udit Kumar , Abhash Kumar , Beleswar Padhi , Thomas Richard , Gregory CLEMENT , Thomas Petazzoni , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Genoud Subject: [PATCH v4 6/7] arm64: dts: ti: k3-j722s-ti-ipc-firmware: Reserve memory for LPM metadata Date: Mon, 21 Sep 2026 16:53:24 +0200 Message-ID: <20260921145325.300025-7-richard.genoud@bootlin.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260921145325.300025-1-richard.genoud@bootlin.com> References: <20260921145325.300025-1-richard.genoud@bootlin.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 Declare a carveout memory region to store LPM metadata on J722S. For Jacinto devices, this memory region is needed for saving ATF context and the certificate information of ATF and OPTEE and DM image. This LPM metadata area is firewalled to be accessed only by TIFS. U-Boot R5 SPL/TIFS will use this area to save and restore: - ATF context - ATF certificate information - OPTEE certificate information - DM image (which has been copied in memory at boot time by U-Boot R5-SPL) At resume, U-Boot R5 SPL is executed and detects that the board is resuming (with a flag set in the PMIC), then it: - brings out of retention the DDR - retrieves the LPM memory region from DTS - authenticates certificates from LPM memory region and applies firewalls - asks TIFS to restore TFA and its own minimal context - starts TFA on remote proc - loads back DM image from memory and jumps to DM https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/pm/lpm.html#lpm-msg-lpm-save-addr As this is used by U-Boot SPL, bootph-pre-ram is added. NB: This memory region is not part of DM memory (which is not retained at suspend) Signed-off-by: Prasanth Babu Mantena Signed-off-by: Richard Genoud (TI) --- arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi index a59c3648d805..5d8499a33fcd 100644 --- a/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi @@ -59,6 +59,12 @@ rtos_ipc_memory_region: memory@a5000000 { alignment = <0x1000>; no-map; }; + + lpm_memory_region: memory@a6c00000 { + reg = <0x00 0xa6c00000 0x00 0x00300000>; + no-map; + bootph-pre-ram; + }; }; &mailbox0_cluster0 { @@ -122,8 +128,10 @@ &wkup_r5fss0 { &wkup_r5fss0_core0 { mboxes = <&mailbox0_cluster0 &mbox_wkup_r5_0>; memory-region = <&wkup_r5fss0_core0_dma_memory_region>, - <&wkup_r5fss0_core0_memory_region>; - memory-region-names = "dma", "firmware"; + <&wkup_r5fss0_core0_memory_region>, + <&lpm_memory_region>; + memory-region-names = "dma", "firmware", "lpm-metadata"; + bootph-pre-ram; status = "okay"; };