From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 17 May 2024 08:11:29 +0200 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 1s7qoT-000t0P-0x for lore@lore.pengutronix.de; Fri, 17 May 2024 08:11:29 +0200 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 1s7qoS-00020W-LE for lore@pengutronix.de; Fri, 17 May 2024 08:11:29 +0200 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:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=NYMdZX4W+R2xiSLSdh9ox96SvQMs0m+wwM4o0F1Npzk=; b=vKdbtSDQUuvJFE4YU6gbTomlxU 36PghMtib7AgNRZrSDmdHNARZXy6gdgviFfaeaSneiPrAMXEJnkIivVya0QM6RyJ1i0HOH7W7dfGr EWETwmuMOOyjXF0LU197uuPVD5fYtnXtV4utoL9tAyC0WBY8rcgcv8gSfp6iJk1ZPE6yByKKtzWFO G76OdG3zJyTTsQDy1cIZegTESP1eGM6hGZhJR74PJ/RURvxX43I+EPuoZLj7CMBYP8v413YNuzfH7 iPo9GeWdC6vfoh0fD9iKw40DFdDg9Zd35GcgMPNytzlyUEWoeBCu0nkK1TKbSqczbQ+lMR4M16Dse FfEGWBWQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7qo4-00000006uxO-3QUC; Fri, 17 May 2024 06:11:04 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7qnz-00000006uwV-3z11 for barebox@lists.infradead.org; Fri, 17 May 2024 06:11:01 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1s7qny-0001sG-K1; Fri, 17 May 2024 08:10:58 +0200 Received: from [2a0a:edc0:0:1101:1d::54] (helo=dude05.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1s7qny-001pYS-7l; Fri, 17 May 2024 08:10:58 +0200 Received: from localhost ([::1] helo=dude05.red.stw.pengutronix.de) by dude05.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1s7qny-00DqRn-0U; Fri, 17 May 2024 08:10:58 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Fri, 17 May 2024 08:10:56 +0200 Message-Id: <20240517061057.3299857-1-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240516_231100_424598_C8BB41A7 X-CRM114-Status: UNSURE ( 8.56 ) X-CRM114-Notice: Please train this message. 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=-5.6 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH master 1/2] ARM: document PBL barebox memory layout 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) Apparently, we have an overlap between ramoops/barebox proper and the early malloc area. Before fixing that, let's add a diagram explaining the current state of affairs. Signed-off-by: Ahmad Fatoum --- arch/arm/include/asm/barebox-arm.h | 36 ++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/arch/arm/include/asm/barebox-arm.h b/arch/arm/include/asm/barebox-arm.h index 4d70360b9121..30834233fb96 100644 --- a/arch/arm/include/asm/barebox-arm.h +++ b/arch/arm/include/asm/barebox-arm.h @@ -52,6 +52,42 @@ static inline void arm_fixup_vectors(void) void *barebox_arm_boot_dtb(void); +/* + * ----------------------------- endmem ------------------------------ + * ↑ + * OPTEE_SIZE (depends on CONFIG_OPTEE_SIZE) + * ↓ + * ------------------------- arm_mem_optee() ------------------------- + * ↑ + * SZ_32K + * ↓ + * ------------------------ arm_mem_scratch() ------------------------ + * ↑ + * STACK_SIZE + * ↓ + * ------------------------- arm_mem_stack() ------------------------- + * ↑ + * PAGE_SIZE (depends on CONFIG_STACK_GUARD_PAGE) + * ↓ + * ----------------------- arm_mem_guard_page() ---------------------- + * ↑ + * ARM_EARLY_PAGETABLE_SIZE + * ↓ + * ------------ arm_mem_ttb() / arm_mem_early_malloc_end() ------------ + * ↑ ↑ + * CONFIG_FS_PSTORE_RAMOOPS_SIZE SZ_128K + * (depends on FS_PSTORE_RAMOOPS) | + * | ↓ + * | ------ arm_mem_early_malloc() --- + * ↓ + * ------------------------- arm_mem_ramoops() ------------------------ + * ↑ + * (barebox uncompressed image size + * + BSS) rounded to SZ_1M + * ↓ + * ---------------------- arm_mem_barebox_image() --------------------- + */ + static inline unsigned long arm_mem_optee(unsigned long endmem) { return endmem - OPTEE_SIZE; -- 2.39.2