From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 10 Nov 2025 21:35:49 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vIYc9-00HVPQ-2h for lore@lore.pengutronix.de; Mon, 10 Nov 2025 21:35:49 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vIYc5-0002Jd-Fw for lore@pengutronix.de; Mon, 10 Nov 2025 21:35:49 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ubrgmoXpgn7dsPL+AWgiDFVG5uFaQ5AaRUioSGRTjVI=; b=3fJOqFUKv1aGcCGe/TSnxw8iY8 bxX2pw2XfQQmZtgYMnOVr5jzmAxE9IbFi+EyhFAIkdpKMvyfwolTdE7cZCp5INNOBr+lPhrMnbdRv vkrMhCDNfKNZO50j1WuaRXx42VHMNeOipsI3Je6ntGLwXxdw+qkDz9QaKrs7slh7VZ8HAr9GkBO2L /F0uBtwIJwsURxWVsYFseRVKiW5oTm8dSEGttrzt6LlKAzQlJficAF/Yb+OZBsVKpbVwCtsKZJUa9 v4sgzkMnjP1D8oEiQdHHGeZryivdY51w5NmNvSvtLzoN/XAN5Zvh4yEPY/s6Y9MvekffHxaVuRKBI YioBupQQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vIYbH-000000065ZG-2wVO; Mon, 10 Nov 2025 20:34:55 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vIYbB-000000065SI-29io for barebox@lists.infradead.org; Mon, 10 Nov 2025 20:34:52 +0000 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1vIYb8-0001MT-NC; Mon, 10 Nov 2025 21:34:46 +0100 From: Marco Felsch Date: Mon, 10 Nov 2025 21:34:50 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251110-v2025-09-0-topic-optee-of-handling-v1-10-8f0625ac5471@pengutronix.de> References: <20251110-v2025-09-0-topic-optee-of-handling-v1-0-8f0625ac5471@pengutronix.de> In-Reply-To: <20251110-v2025-09-0-topic-optee-of-handling-v1-0-8f0625ac5471@pengutronix.de> To: Sascha Hauer , BAREBOX Cc: Marco Felsch X-Mailer: b4 0.14.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251110_123449_559478_A1C76BD3 X-CRM114-Status: GOOD ( 14.26 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.0 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 10/23] ARM: i.MX: scratch: add FDT support X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Add support to store a FDT within the scratch area. The user needs to query the location and size via imx_scratch_get_fdt() which can be used afterwards to write the actual FDT into it. Signed-off-by: Marco Felsch --- arch/arm/mach-imx/scratch.c | 16 ++++++++++++++++ common/Kconfig | 14 ++++++++++++++ include/mach/imx/scratch.h | 2 ++ 3 files changed, 32 insertions(+) diff --git a/arch/arm/mach-imx/scratch.c b/arch/arm/mach-imx/scratch.c index e4e2d25969f061c9fcdfd7c3d87701b715eb2805..9c0f1c09c4e0b863d8c95888db7cf0518f698d53 100644 --- a/arch/arm/mach-imx/scratch.c +++ b/arch/arm/mach-imx/scratch.c @@ -16,7 +16,10 @@ struct imx_scratch_space { u32 bootrom_log[128]; u32 reserved[128]; /* reserve for bootrom log */ struct optee_header optee_hdr; + /* FDT needs an 8 byte alignment */ + u8 fdt[CONFIG_SCRATCH_FDT_SIZE] __aligned(8); }; +static_assert(sizeof(struct imx_scratch_space) <= CONFIG_SCRATCH_SIZE); static struct imx_scratch_space *scratch; @@ -92,3 +95,16 @@ const struct optee_header *imx_scratch_get_optee_hdr(void) return &scratch->optee_hdr; } + +void imx_scratch_get_fdt(void **fdt, unsigned int *fdt_sz) +{ + if (!scratch) { + if (IN_PBL) + return; + else + scratch = (void *)arm_mem_scratch_get(); + } + + *fdt = scratch->fdt; + *fdt_sz = sizeof(scratch->fdt); +} diff --git a/common/Kconfig b/common/Kconfig index eb2fb1da1e0919b6e7d5e868c48ad2e195cd8aa8..3f394416c3c376d1cf842472803a47462bb012ed 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -302,8 +302,22 @@ config MALLOC_SIZE config SCRATCH_SIZE hex default 0x8000 + default 0x48000 if PBL_EARLY_FDT_LOAD prompt "Scratch size" +config SCRATCH_FDT_SIZE + hex + default 0x0 + default 0x40000 if PBL_EARLY_FDT_LOAD + prompt "Scratch FDT size" + help + The size of the scratch area used as destination to load and optional + decompress the barebox builtin DTB into it. Can be 0x0 if early FDT + support is not requied e.g. during BL31 and BL32 stage else + SCRATCH_FDT_SIZE <= SCRATCH_SIZE must be ensured. + This option should match the OP-TEE's CFG_DTB_MAX_SIZE configuration + if used by OP-TEE. + config MALLOC_ALIGNMENT hex default 8 diff --git a/include/mach/imx/scratch.h b/include/mach/imx/scratch.h index 6c2cecabcd80f71aa754736322151d63f2711745..43bf55de48099f1662cd4331620a93303d4dd710 100644 --- a/include/mach/imx/scratch.h +++ b/include/mach/imx/scratch.h @@ -14,6 +14,8 @@ struct optee_header; const struct optee_header *imx_scratch_get_optee_hdr(void); void imx_scratch_save_optee_hdr(const struct optee_header *hdr); +void imx_scratch_get_fdt(void **fdt, unsigned int *fdt_sz); + #define imx8mq_init_scratch_space() imx8m_init_scratch_space(32, true) #define imx8mm_init_scratch_space() imx8m_init_scratch_space(32, true) #define imx8mn_init_scratch_space() imx8m_init_scratch_space(16, true) -- 2.47.3