From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (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 856253E5EF1 for ; Fri, 3 Jul 2026 14:37:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783089459; cv=none; b=UOzhhjEbKYWNjG/fqZhSrrPhNyTQYqQssLyghxEpt22vJIx0oLxek4+PXHBjZgOEtvnQQtPa6kUVd/3JLQjCKFW8B83Ezh+Tk6gdY+gSNftLz7KmznWqvDURLG//Y4zeuJv+5a4rk2XxKjJmkcOr+yJm0k7w4ACuSwBpounSLUg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783089459; c=relaxed/simple; bh=Gb2rXOYqFPqV04lOeJHyLPkAsOxeupbVhoD+vGVWiPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I0T8zuDfj+9ODkV/AsFBv4r8sPfo+WefRz15IDpnkRDfkyjESFwOkLmDH7xGEXfFTWjm5pIp/nxbWaVedfSmLXTCc5RxVQx+9l4GRouEm6rfX7xjSTHoJQybcOUbV6dRaRuSdAsULMK82h15Q6fNEdDa3YTVVsHGfz+CmnG4oSk= 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=pP6cUTtJ; arc=none smtp.client-ip=185.246.84.56 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="pP6cUTtJ" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 3961A1A0E1D; Fri, 3 Jul 2026 14:37:32 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 0067460300; Fri, 3 Jul 2026 14:37:32 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 90022104C95AD; Fri, 3 Jul 2026 16:37:29 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1783089451; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=ZJ/9voUOLYhUYyNMjcYNu7y69paVeiMf+gA0FKexqF0=; b=pP6cUTtJ/F/xzem7ZKbh9MD5clvyfGS2OOuHXPcDFswFhimk2mEh/UCkiwwN0mGem4lwrN 9oq3gqyClH1BnzuKDi9D/D4LmJ00pi9+ax6+3JofaLfHy0zsQE2gNjEgx0YJ4WjWhPIqZT IoU0ZeCsx2b9ruw95EBJNxle06pzx+JFnu7VQ8bdQpBmGHK7MTGfHh1eZUR4ZvBLUnR5Dg i5WjNSWFTabHY/qG0JEQrTgjHN2I7G3Lrj8eVW9vcon/cP6MV74ryFs3UuqtXxBPf6p/OH nRtU3dSC4Lb4iEkYT7q+W5JcjO27JiTej+GYwGLMkM5i90Fe1L9oUu0Jt7zxQg== 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 Subject: [PATCH v3 2/6] arm64: dts: ti: k3-j7200-ti-ipc-firmware: Reserve memory for LPM metadata Date: Fri, 3 Jul 2026 16:37:13 +0200 Message-ID: <20260703143717.177362-3-richard.genoud@bootlin.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260703143717.177362-1-richard.genoud@bootlin.com> References: <20260703143717.177362-1-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 J7200. 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 As this is used by U-Boot SPL, bootph-pre-ram is added. https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/pm/lpm.html#lpm-msg-lpm-save-addr 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-j7200-ti-ipc-firmware.dtsi | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi index d65f68c7d432..a6043970715a 100644 --- a/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi @@ -47,6 +47,12 @@ rtos_ipc_memory_region: memory@a4000000 { alignment = <0x1000>; no-map; }; + + lpm_memory_region: memory@a4800000 { + reg = <0x00 0xa4800000 0x00 0x00300000>; + no-map; + bootph-pre-ram; + }; }; &mailbox0_cluster0 { @@ -99,8 +105,10 @@ &mcu_r5fss0 { &mcu_r5fss0_core0 { mboxes = <&mailbox0_cluster0 &mbox_mcu_r5fss0_core0>; memory-region = <&mcu_r5fss0_core0_dma_memory_region>, - <&mcu_r5fss0_core0_memory_region>; - memory-region-names = "dma", "firmware"; + <&mcu_r5fss0_core0_memory_region>, + <&lpm_memory_region>; + memory-region-names = "dma", "firmware", "lpm-metadata"; + bootph-pre-ram; status = "okay"; }; -- 2.47.3