[{"id":3669573,"web_url":"http://patchwork.ozlabs.org/comment/3669573/","msgid":"","list_archive_url":null,"date":"2026-03-26T09:37:01","subject":"Re: [RFC][PATCH 2/3] fdtdec: Introduce fdtdec_setup_mem_ram_top() to\n determine end of topmost DRAM bank","submitter":{"id":74147,"url":"http://patchwork.ozlabs.org/api/people/74147/","name":"Ilias Apalodimas","email":"ilias.apalodimas@linaro.org"},"content":"Hi Marek\n\n[...]\n\n> + * fdtdec_setup_mem_ram_top() - decode and setup gd->ram_top to highest address\n> + * available in any memory bank\n> + *\n> + * Decode the /memory 'reg' property to determine the highest end of the memory\n> + * bank and populate the global data ram_top with it.\n> + *\n> + * This function should be called from a boards board_get_usable_ram_top().\n> + * This helper function allows for boards to query the device tree for topmost\n> + * DRAM address.\n> + *\n> + * Return: 0 if OK, -EINVAL if the /memory node or reg property is missing or\n> + * invalid\n> + */\n> +int fdtdec_setup_mem_ram_top(void);\n> +\n> /**\n> * fdtdec_setup_memory_banksize() - decode and populate gd->bd->bi_dram\n> *\n> diff --git a/lib/fdtdec.c b/lib/fdtdec.c\n> index d820f75b031..bdb26d8fb75 100644\n> --- a/lib/fdtdec.c\n> +++ b/lib/fdtdec.c\n> @@ -1162,6 +1162,24 @@ int fdtdec_setup_mem_size_base_lowest(void)\n> return fdtdec_setup_mem_for_each_bank(fdtdec_setup_mem_size_base_lowest_bankfn);\n> }\n>\n> +static void fdtdec_setup_mem_ram_top_bankfn(struct resource *res, int bank)\n> +{\n> + if ((res->end + 1) > gd->ram_top)\n> + gd->ram_top = res->end + 1;\n\nWe can also update gd->ram_size.\n\nI'll send a v2 with some changes in board_f.c using this code, so I'll\nupdate it there\n\nReviewed-by: Ilias Apalodimas \n\n\n> +}\n> +\n> +int fdtdec_setup_mem_ram_top(void)\n> +{\n> + phys_addr_t old_top = gd->ram_top;\n> + int ret;\n> +\n> + ret = fdtdec_setup_mem_for_each_bank(fdtdec_setup_mem_ram_top_bankfn);\n> + if (ret)\n> + gd->ram_top = old_top;\n> +\n> + return ret;\n> +}\n> +\n> static int uncompress_blob(const void *src, ulong sz_src, void **dstp)\n> {\n> #if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\\\n> --\n> 2.53.0\n>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=bThvDlIa;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=none dis=none) header.from=linaro.org","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.b=\"bThvDlIa\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=none dis=none) header.from=linaro.org","phobos.denx.de;\n spf=pass smtp.mailfrom=ilias.apalodimas@linaro.org"],"Received":["from phobos.denx.de (phobos.denx.de\n [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fhJbY0XSSz1y1x\n\tfor ; Thu, 26 Mar 2026 20:37:45 +1100 (AEDT)","from h2850616.stratoserver.net (localhost [IPv6:::1])\n\tby phobos.denx.de (Postfix) with ESMTP id CC2F484082;\n\tThu, 26 Mar 2026 10:37:42 +0100 (CET)","by phobos.denx.de (Postfix, from userid 109)\n id BB62F84090; Thu, 26 Mar 2026 10:37:41 +0100 (CET)","from mail-yx1-xb133.google.com (mail-yx1-xb133.google.com\n [IPv6:2607:f8b0:4864:20::b133])\n (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits))\n (No client certificate requested)\n by phobos.denx.de (Postfix) with ESMTPS id 3D0E383FE1\n for ; Thu, 26 Mar 2026 10:37:39 +0100 (CET)","by mail-yx1-xb133.google.com with SMTP id\n 956f58d0204a3-64e9f9226a7so829947d50.2\n for ; Thu, 26 Mar 2026 02:37:39 -0700 (PDT)"],"X-Spam-Checker-Version":"SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de","X-Spam-Level":"","X-Spam-Status":"No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,\n DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED,\n SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.2","ARC-Seal":"i=1; a=rsa-sha256; t=1774517858; cv=none;\n d=google.com; s=arc-20240605;\n b=gKuMYxamevHPtB21zpJVv8fTQoDbYGDPwmip+FDPN0SI4An0Au4xOiKyBiaOaDIdw0\n xtZtGXFIlZRmtivb8az1QG6ya6Ce1QeT0KimpDzBxmdH4cSmms0lT/yvk61/QoMP1Pxn\n +7kOgMMY/glrkRDlk0+/K7tA6IJHNOooMzmLmiurIWunYS1aUoE3WTgTyLztc0zxoYAs\n ER+XfOJ/O9deTd4GRqQUHxCu4bLgkt97rNWCZWqfBw86IWMlWZRZRD+dVA11Xj+QPSQV\n vAAG5oIORsLjtKDaoASiSrmJi6jXs9tosA4dv/J5nJAhcdBf+ZDv7YmVRenmDSwtJ2xm\n P8qQ==","ARC-Message-Signature":"i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com;\n s=arc-20240605;\n h=cc:to:subject:message-id:date:from:in-reply-to:references\n :mime-version:dkim-signature;\n bh=Vzqj5N8bfx7tobPdCoo0JIHk9oR9fLErkH6F5h4UgBk=;\n fh=nEkXRhqCjx3ONPRTdOk67xC+ThsQtT0sulRkQM3zgmo=;\n b=UuCLARt4n9JYFeMaEgsZcm0uZnYQIdH9+6bYMVfKW8ySlW75TRFo86zFym/laf0RZ8\n eWpFBrRV+BoArK2ASmtzDlN29ljVB8lIz8NI4MeUW9v2ucbLPPwmqpyYMptKR5CVlVzN\n dedUfY378KEnPq4IwIwBP17Z+3fFwGI8zNtPqGBrHV7KyfYIv3kpvcxhpgQ+1vdbqm7w\n UB/MOXl+Itk3ALWASw49+jdkmJV8TBxjMmzBM6OPhTx3wIf3gLjYvD4FDw5xAIRyig3g\n PotBRREHUTtb/VOG8gJjyNwbh3Nox4zMGj71X3Z4Xuik6Pl/097subfGoPVQUjLTu+ag\n s5/g==; darn=lists.denx.de","ARC-Authentication-Results":"i=1; mx.google.com; arc=none","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=linaro.org; s=google; t=1774517858; x=1775122658; darn=lists.denx.de;\n h=cc:to:subject:message-id:date:from:in-reply-to:references\n :mime-version:from:to:cc:subject:date:message-id:reply-to;\n bh=Vzqj5N8bfx7tobPdCoo0JIHk9oR9fLErkH6F5h4UgBk=;\n b=bThvDlIazx2X2ToNXO8YjPWvtR0v3qJGz5rJmob8qAT/bTj1PfvjBu18d9bTjZ+nC2\n zDrR3UCq6moOh2rLb2w5ZdaFQOmeqSH5JOyMq/OLcwwAZX3HSnMvJCLXnWbglAlddyoG\n se4RI0JBLP4y0YwnpyL7NLb7aAOnT9FBMcukiu86qNzLDhS4vad4rpo7hF3oymkj6DTd\n fh+r2ViF3QiV+TYm7JDxQ1sTMlsgENN9io+ZmHSTxwi0I/+rfPCuUjRPOQHWjTKLRgsm\n XUJkTKEvAZoxD2PVzLWoBReV46iPWqa15nFk9gJlPIyNLbuTw+c1Tm6E1Wj4W2CsF52b\n Y2hQ==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1774517858; x=1775122658;\n h=cc:to:subject:message-id:date:from:in-reply-to:references\n :mime-version:x-gm-gg:x-gm-message-state:from:to:cc:subject:date\n :message-id:reply-to;\n bh=Vzqj5N8bfx7tobPdCoo0JIHk9oR9fLErkH6F5h4UgBk=;\n b=SoRwLjNP4mNIwdKheDvUkH0RSaa4xaKS0qXGzslBgfKusnBfW1v39F0L89EvynChss\n 03tonN4a7GvRxjCKQNOO/i05YUW9h0CYxxlaSQUlk0J34s50o5j1IzPsvtUQEkrdLpfm\n s9waJsb5ytJBZMx6R7nIi2ybAIddfZ+23BmdNwKom0STuMskjclMVhHlHPIESjJXmGot\n uyomGFnTMKRFHZ+zrhI4ia0Hc0LWHl+0lsm4jqfrVnatqTv9aQ0nY7YXcde7rOM/Xq6M\n ZwSd3xz+xmWTnDVuqhqkKAGZpXDhUOA+SXzkLdh78JP+qwtC+V/W6QLcKEF/zef8JlcL\n hnSA==","X-Gm-Message-State":"AOJu0Yzd60U5U6eHnxSBoOGBwIyiIobBdyxtvrhsQZMbvizGfwHHljG6\n 56IbqYWp6TMFS8iw1pHs1G+ZWxffaLQPoPjYR4mTOR+Pj8Uu0LtR42HEqntViu2BC7mQXIgTjwZ\n Jo7u44UaWF/QnEF1BOLpas0k7EwapRfexvz9P8P8N3A==","X-Gm-Gg":"ATEYQzyc16rT28L1L8/BXheO2EYBWlMIVSzArjNX2VrU7IrKc2nXWkCe4GyEAZxO5Qh\n sb43G3Xj3ypIUHcq+P2L4RtR0UwjBYW9zY1ZfY7AD1voG4f5AY3QglrqyV/32I6S5jjrWV5Abey\n dhSnJYTdnvjepjRXy8eULGm5xnDyUXzfHLwaEVJCr6FcuyVdjvM8DL6yId4zmxPsRJ5XmHHe3qG\n HdiYqzRr8J4lmlnBpileaRIhOoWZmaonCQtRLURUJjMj4VZGXYXaZdH4pwxCPcD9WlkF04b2OXz\n pSWjuDmGroh+2OFpZoNV7KofI4ANNt0HQ6hH9nBBW/I17TGwy5hz4RkzCO4RMrGfcGQR6XbJfD4\n tRotJbVzKgWN6rA27tO1iMbxmyPooJb6aUQhMca7wOpJ1FgMR/O5b0SxhcdYfGmqpTmYOqgiL0K\n nEeYeI+To8xXoJQTraYx+6Vs0pvFV09GgMYd4bUdMSs1y6r4CR8oar6fF+zCDx/ugK9yVbP3S2u\n XiLwpDxE3fq1RwzEgiEYV/JRY7vix8fHZs0u1Elw6AHQsm57t51MBH7GZs5qJ2rJGqZJqbegi1c\n Niduw5izVNnMlfYQAyUsQGsDREO+8yVN9AXQxQW5Zhmd","X-Received":"by 2002:a05:690e:419b:b0:64e:edea:dee3 with SMTP id\n 956f58d0204a3-64eedeae164mr4259860d50.44.1774517857990; Thu, 26 Mar 2026\n 02:37:37 -0700 (PDT)","MIME-Version":"1.0","References":"<20260325031743.371728-1-marek.vasut+renesas@mailbox.org>\n <20260325031743.371728-2-marek.vasut+renesas@mailbox.org>","In-Reply-To":"<20260325031743.371728-2-marek.vasut+renesas@mailbox.org>","From":"Ilias Apalodimas ","Date":"Thu, 26 Mar 2026 11:37:01 +0200","X-Gm-Features":"AaiRm51EjpLRrMgJQFh6Fre_Yn6EDBQ3Y8JFt-PRz-SxzAvDukC0uhdhoU8hyKk","Message-ID":"\n ","Subject":"Re: [RFC][PATCH 2/3] fdtdec: Introduce fdtdec_setup_mem_ram_top() to\n determine end of topmost DRAM bank","To":"Marek Vasut ","Cc":"u-boot@lists.denx.de, Casey Connolly ,\n Nobuhiro Iwamatsu ,\n Raymond Mao ,\n Simon Glass , Tom Rini ","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}}]