From patchwork Fri May 26 12:10:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sunil V L X-Patchwork-Id: 13256852 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B4A83C77B7C for ; Fri, 26 May 2023 12:12:01 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q2WHQ-0004sv-Pq; Fri, 26 May 2023 08:10:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q2WHF-0004pX-Tp for qemu-devel@nongnu.org; Fri, 26 May 2023 08:10:40 -0400 Received: from mail-oa1-x36.google.com ([2001:4860:4864:20::36]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1q2WHA-0005Kx-8x for qemu-devel@nongnu.org; Fri, 26 May 2023 08:10:35 -0400 Received: by mail-oa1-x36.google.com with SMTP id 586e51a60fabf-19f22575d89so23361fac.0 for ; Fri, 26 May 2023 05:10:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1685103029; x=1687695029; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=0SMtqwocGY/rL4SvD4PKQMdaIYi1C6Pm17aeP+9/5u4=; b=kJI/zhw4NUdxMHIej6vzNVEPf7gRRvyFg5H7JxTMiK11j9iaJjxW07pQvwa4XT42cF cJyCmWeoMlBzekmRpZgG5z2aWNzZXkipSltwwb69cm2utZLiv4SmM+d7+boKCy15xWha RvYJBOhKfQBuZ96RemwDRRVe68cxqCMizaF3u9gDi727ycDklNQoasfIwTcWBlenEagY z6YIMi09pTPxdx/wdQ+Du/BeieO5FTtaiLSXc48vDSygwUXuDSdagBDG9NfLOFoUGGeG NCprqWwj8SNBJscbE0Mts+687y9dSifZrpiGe5321yJJHfs8tB6kq1DoAw++mtxVAuRi wF4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685103029; x=1687695029; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0SMtqwocGY/rL4SvD4PKQMdaIYi1C6Pm17aeP+9/5u4=; b=LJl5O7qWye4TWSNfNPNtEi/Xk+xbjBNoeq1pEclSWg1cMnW8sUYB3qdCIvj+KXHA6S ovsfX86tImgILll8MZk6oSa/z+9rKGRMJ63HMFRbcKD6QVG93DPrybBtkR/5A/vLc4Lf vZc2AzMDrRhS7hdvJeCr8/Y9bQ6HoiN8erajlznTFsWW5UGNv2JIz+q3GV25Ot95mo5m 5Uu/dQHc2PQLDt+Y/TiF2g1zRWVV15eT5evoKZs2FqtihIn2BcmmzwtWK65uZRCzhELk 0GhjE8WR6LtgyrdQKZXCqxiWHXEhRDEFO70zZaSN3o8ggBRrpJy4ceyP5PIurnWH6lDP moZA== X-Gm-Message-State: AC+VfDx941Jv5KXBg0d/DEDoUrS96ZfJiKubwAJo75j+GjWcBZi9QaVZ LdOaMk00Bc0bP5o0BiJbxyluDw== X-Google-Smtp-Source: ACHHUZ7cpCdW7aitKNZrqYZkeGvRAytiuaGmC5jOv6o3OxV0mZ2UzCqSLER136w/q58uVqINqnUa4w== X-Received: by 2002:a05:6808:45:b0:398:1eae:f773 with SMTP id v5-20020a056808004500b003981eaef773mr736904oic.41.1685103029702; Fri, 26 May 2023 05:10:29 -0700 (PDT) Received: from sunil-laptop.dc1.ventanamicro.com ([106.51.186.3]) by smtp.gmail.com with ESMTPSA id g10-20020a9d618a000000b006abb3b660a9sm1611602otk.54.2023.05.26.05.10.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 May 2023 05:10:29 -0700 (PDT) From: Sunil V L To: qemu-riscv@nongnu.org Cc: qemu-devel@nongnu.org, Palmer Dabbelt , Alistair Francis , Bin Meng , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , Andrea Bolognani , Sunil V L Subject: [PATCH v5 3/3] docs/system: riscv: Add pflash usage details Date: Fri, 26 May 2023 17:40:06 +0530 Message-Id: <20230526121006.76388-4-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230526121006.76388-1-sunilvl@ventanamicro.com> References: <20230526121006.76388-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2001:4860:4864:20::36; envelope-from=sunilvl@ventanamicro.com; helo=mail-oa1-x36.google.com X-Spam_score_int: -5 X-Spam_score: -0.6 X-Spam_bar: / X-Spam_report: (-0.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_SORBS_WEB=1.5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org pflash devices can be used in virt machine for different purposes like for ROM code or S-mode FW payload. Add a section in the documentation on how to use pflash devices for different purposes. Signed-off-by: Sunil V L Reviewed-by: Philippe Mathieu-Daudé --- docs/system/riscv/virt.rst | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/docs/system/riscv/virt.rst b/docs/system/riscv/virt.rst index 4b16e41d7f..3e873c67f3 100644 --- a/docs/system/riscv/virt.rst +++ b/docs/system/riscv/virt.rst @@ -53,6 +53,35 @@ with the default OpenSBI firmware image as the -bios. It also supports the recommended RISC-V bootflow: U-Boot SPL (M-mode) loads OpenSBI fw_dynamic firmware and U-Boot proper (S-mode), using the standard -bios functionality. +Using flash devices +------------------- + +The first flash device (pflash0) can contain either ROM code +or S-mode payload firmware code. If the pflash0 contains the +ROM code, -bios should be set to none. If -bios is not set to +none, pflash0 is assumed to contain S-mode payload code. + +Firmware images used for pflash should be of size 32 MiB. + +To boot as ROM code: + +.. code-block:: bash + + $ qemu-system-riscv64 -bios none \ + -blockdev node-name=pflash0,driver=file,read-only=on,filename= \ + -M virt,pflash0=pflash0 \ + ... other args .... + +To boot as read-only S-mode payload: + +.. code-block:: bash + + $ qemu-system-riscv64 \ + -blockdev node-name=pflash0,driver=file,read-only=on,filename= \ + -blockdev node-name=pflash1,driver=file,filename= \ + -M virt,pflash0=pflash0,pflash1=pflash1 \ + ... other args .... + Machine-specific options ------------------------