From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1do0Lp-0000HM-NU for mharc-grub-devel@gnu.org; Sat, 02 Sep 2017 00:48:09 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46816) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dnztT-0006ox-I6 for grub-devel@gnu.org; Sat, 02 Sep 2017 00:18:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dnztO-0003OF-TR for grub-devel@gnu.org; Sat, 02 Sep 2017 00:18:51 -0400 Received: from mail-pf0-x22d.google.com ([2607:f8b0:400e:c00::22d]:34012) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dnztO-0003Lx-Mt for grub-devel@gnu.org; Sat, 02 Sep 2017 00:18:46 -0400 Received: by mail-pf0-x22d.google.com with SMTP id l87so5330462pfj.1 for ; Fri, 01 Sep 2017 21:18:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:content-transfer-encoding:mime-version:subject:message-id:date :to; bh=eUtd+uHVStbA6bpbNO4YXGEVo34kuhMo2m9mbnJ/+7A=; b=JcNZ+NOysn1KwbeUc2yz9seIxAfE9zZcQkr3pK8nuOWMwq0AJ2IWMKrF+ibASz1GFq b0dGPj40u2y5HCrqFVf2CfLsWpT7rNMGM3Yq8AFkgcxmoGT0nbDO/L0wwasnpMDusdxE fl6c1RqUThC03oFle7lJcXRhs7b5Txc6mxbNf0baS6wPl3/tq2MlwH6P6Knw3gZPex8b n/tC10OzUUo8yL4fvYTLr8htGEaHCSp1u+RHZz+Ys8adBlZeH5cgpL2V0YjlF0plsbqF C45JT0Te4fO/7RE2nytf7yyN9rWm+D9sEPSa2dtKw7JOQT24KITS2jIPLTHnQe7bc0Vb x4Yw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:mime-version :subject:message-id:date:to; bh=eUtd+uHVStbA6bpbNO4YXGEVo34kuhMo2m9mbnJ/+7A=; b=ssuPKng6Ca0d+iqTpz4tGhj/8YgUZUkM7mXYIwnGKQz54YjYMlYCKJwhu3DP7+wlTl AuRnZ4qOz8y4zUesPm/7r9QGF2HcJd0o79yhsaKrDZYZkG4eFY7p0YAwc2l1NrP7MezV /rKbS15Lgpb5/zWJ9zNS8UmwTmiMEWLS0FlhDFaKSPeLYsgWFgKZKprrjGmlhnHVhZSj yvgMF7z+dYzeRHWG3/2nQiCrpUinYgYNfy8BcGLGQyYc5loA5e5uWzF3GypsERoQZCW1 Cfsqr29hvH4J0KWXvW4NYVqdFaMNajs9uy+h8dmHsylCPEHDYrDme4PHQH5km7aZajTd 2/Yg== X-Gm-Message-State: AHPjjUiODcW3E1Tm31X4uJ1Vqk0HaFjsDPsDCiWOmzpNJ102ChZE/uDK 0EHsWvQua5UFIp8Tgck= X-Google-Smtp-Source: ADKCNb5Tmw/SWikA5bIuAn3VQ6J34v1wjf7zhnBD+HX8f+zLIEXwwZZw4RaLePBeOszxk3nc/3zI3g== X-Received: by 10.98.20.194 with SMTP id 185mr4705612pfu.296.1504325924146; Fri, 01 Sep 2017 21:18:44 -0700 (PDT) Received: from [192.168.0.103] ([103.221.71.83]) by smtp.gmail.com with ESMTPSA id c23sm2137892pfc.60.2017.09.01.21.18.42 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 01 Sep 2017 21:18:43 -0700 (PDT) From: Arindam Khan Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: PCIe communication at linux command in grub-core/loader/i386/linux.c Message-Id: Date: Sat, 2 Sep 2017 09:48:40 +0530 To: grub-devel@gnu.org X-Mailer: Apple Mail (2.3273) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c00::22d X-Mailman-Approved-At: Sat, 02 Sep 2017 00:48:08 -0400 X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 02 Sep 2017 04:18:52 -0000 Hi, I have a PCIe 4x card in PCIe slots, which does a communication to = card, before =E2=80=9Clinux=E2=80=9D command is loaded. I had an = implementation of PCIe communication which perfectly works for BIOS = based system. However, when i configure he GRUB2 for EFI system and = install it, the same communication to PCIe board does not occur. It is = not able to read/write BAR2 address and giving communication error. I have following questions in this regard -=20 a) Is any changes in GRUB2 for UEFi system for PCIe communication b) TLP packet generated for PCIe communication uses 32-bit or 64-bit = address?. Because BIOS uses 32-bit address only for PCIe TLP. with regards, Arindam=20=