From patchwork Thu Mar 16 14:26:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bin Meng X-Patchwork-Id: 739861 X-Patchwork-Delegate: bmeng.cn@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 3vkWBQ32KDz9rvt for ; Fri, 17 Mar 2017 01:31:42 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="JGY65bBT"; dkim-atps=neutral Received: by lists.denx.de (Postfix, from userid 105) id 12992C21C87; Thu, 16 Mar 2017 14:27:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H2, T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 53DDFC21C71; Thu, 16 Mar 2017 14:25:25 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 6D73AC21C91; Thu, 16 Mar 2017 14:22:40 +0000 (UTC) Received: from mail-pf0-f194.google.com (mail-pf0-f194.google.com [209.85.192.194]) by lists.denx.de (Postfix) with ESMTPS id 3A3F2C21C7B for ; Thu, 16 Mar 2017 14:22:37 +0000 (UTC) Received: by mail-pf0-f194.google.com with SMTP id o126so5974662pfb.1 for ; Thu, 16 Mar 2017 07:22:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references; bh=7R6etl38Fv/y3kC9JqfQsycEuTyJ8CgtCJm0+jaPQ6k=; b=JGY65bBTqOKc/5uT0Lm4p/AjKq7DcMlRPOymScgpm4M9+xbBKrc7ttNVQM7X5x/yqw JOAPP7QVrYM0w0GcaxuHMDl+GIcDZ8+EbqtfDVU7x5vOffp7gvlqANo1qjgP8UyL4G7b z+ZJe/q3p57h1XL7uk77+bSO/CVkrTYKhYeAEoESv54dX8jY3QjWK82JlAo7R839V6WZ pLTl0gJLL58E4d8FNv0fVuXrTK3xRRePbyl/CqZf8oEtbQs3KEkpilPqMOX2xHZRW44c 2jwhMAiWnbXg9heQ4T5YCNZcD3w7VjuKZ1qe6BiG5zWrwd9ZzNeTgCrE069abjEwG4lj Xh8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=7R6etl38Fv/y3kC9JqfQsycEuTyJ8CgtCJm0+jaPQ6k=; b=Ms/eEX+d3iMlLyeG+apQjxg5PqrDHZ9m3mO2wUz5C1FT3uho1SlS8+sNMjKrCp1Uec A+7ZlX4iXqL9Ps56Me870mRd2gI0vC62/BI3zgmObWFqFoO3EYnzx5N++PljguPzZ2Cz aiyay2NJj98xp9FRTJW1GN/GaOn435xkuJZYC12l48iHazPpViShF6nsi8mBZ6qcsXXK /K2BQ0mZrWqsdmojvHUoU23+QkRp2ie+Zz5a3VfVGqMQvpFZszHU91Uwhl96B53PiWPi Xkc4OCNPLJmW7qtzvI9U0XFnOGJKcd37o/N43aiZBmTxWUnzFynGrSWQ10yMwpEd7n3s 8dtA== X-Gm-Message-State: AFeK/H23oB244C3JRkB4om+7UTRgp45SAgeH0ApNGQ0r1z3ztFhTqh3Lu2i9Ik38Il2/Fg== X-Received: by 10.99.163.91 with SMTP id v27mr5634019pgn.171.1489674155933; Thu, 16 Mar 2017 07:22:35 -0700 (PDT) Received: from ala-d2121-lx1.wrs.com (unknown-157-139.windriver.com. [147.11.157.139]) by smtp.gmail.com with ESMTPSA id c64sm11039959pfa.45.2017.03.16.07.22.34 (version=TLS1_1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 16 Mar 2017 07:22:34 -0700 (PDT) From: Bin Meng To: Simon Glass , Stefan Roese , U-Boot Mailing List Date: Thu, 16 Mar 2017 07:26:40 -0700 Message-Id: <1489674408-17498-15-git-send-email-bmeng.cn@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1489674408-17498-1-git-send-email-bmeng.cn@gmail.com> References: <1489674408-17498-1-git-send-email-bmeng.cn@gmail.com> Subject: [U-Boot] [PATCH 14/22] x86: fsp: Mark the first 64K low memory as reserved X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" Mark the first 64K memory as reserved as well since U-Boot uses this memory region for things like VBIOS execution in real mode. After kernel resumes, it checks low memory range per config option CONFIG_X86_RESERVE_LOW which is 64K by default to see whether a memory corruption occurs during the suspend/resume. Signed-off-by: Bin Meng Reviewed-by: Simon Glass --- arch/x86/lib/fsp/fsp_dram.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/lib/fsp/fsp_dram.c b/arch/x86/lib/fsp/fsp_dram.c index 417c611..2b383ef 100644 --- a/arch/x86/lib/fsp/fsp_dram.c +++ b/arch/x86/lib/fsp/fsp_dram.c @@ -100,6 +100,18 @@ unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) CONFIG_STACK_SIZE; entries[num_entries].type = E820_RESERVED; num_entries++; + + /* + * Mark the first 64K memory as reserved as well since U-Boot uses + * this memory region for things like VBIOS execution in real mode. + * After kernel resumes, it checks low memory range per config option + * CONFIG_X86_RESERVE_LOW which is 64K by default to see whether a + * memory corruption occurs during the suspend/resume. + */ + entries[num_entries].addr = 0; + entries[num_entries].size = 0x10000; + entries[num_entries].type = E820_RESERVED; + num_entries++; #endif return num_entries;