From patchwork Wed Nov 21 03:41:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 1000902 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=brainfault.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=brainfault-org.20150623.gappssmtp.com header.i=@brainfault-org.20150623.gappssmtp.com header.b="mvAlSXF3"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 4307ff5Xvwz9s0n for ; Wed, 21 Nov 2018 14:41:42 +1100 (AEDT) Received: by lists.denx.de (Postfix, from userid 105) id B03F0C221FD; Wed, 21 Nov 2018 03:41:32 +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=0.6 required=5.0 tests=RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, RCVD_IN_SORBS_WEB, T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 775D9C2214A; Wed, 21 Nov 2018 03:41:30 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 16B3CC2214A; Wed, 21 Nov 2018 03:41:29 +0000 (UTC) Received: from mail-pl1-f195.google.com (mail-pl1-f195.google.com [209.85.214.195]) by lists.denx.de (Postfix) with ESMTPS id 6EC4BC2210F for ; Wed, 21 Nov 2018 03:41:28 +0000 (UTC) Received: by mail-pl1-f195.google.com with SMTP id b5so3396455plr.4 for ; Tue, 20 Nov 2018 19:41:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brainfault-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id; bh=PDuSOyPUo6cfS0PTlNJGE88dEBJPJBotXf9HIrW2VgU=; b=mvAlSXF3HdpxiJfb1HpEpHnwFqGUKeCZ6RvCk3axJTRkMRYGnK1edLFKuXlHWcu+QA 7ktcZhf7kWlVp6zotTiKXg0aneEq8TZh6/c2cF+T1rEXKv56vJh7MN4azmiZsbHHr4TP IZATIviTIQsoCxPeiQOIbTjXIBqEfp85cgqdwZFAtIjeMdPl5rW8tuABjRuJtubOrqIg VfKxouk6B5oM+SnYNVX9CRU6aoTWNs07TgkmHw3yqCz/KzOPibtVdwrTdlfmeNgQv1lY r8NYPJTo2oGZJsNxC/AZAAC9FcK8WwvuFXcUkdFYt900XIVoWijWn4Qs+2V6LfrES/3o MuNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=PDuSOyPUo6cfS0PTlNJGE88dEBJPJBotXf9HIrW2VgU=; b=RvWj2F7JDZKz3xVPbi7q3QKrHtwp3uJRY7Pp+8X1dKR3bslFXtQDIxFw3XikTtYQW4 bKEL4xwFWkm/+jSQejA5GPubkMU673bVPDuBEyx7JmKKsnLgW2EhIziJnOqjz/1wBAwG W4ewLwg59mbuk1MWIImJaBXOtLG8Fk45eN/6tkOuV2WdczHgNsDNw8i+Y7Ebi2mOYzRf iEtPLlnIRm+ZJL8RaSiLcjK9X3xxXyB+Twim+j1RYugpoDTx5bVRbMCJNxcjag7VFvA9 HD8nCwfUMv6V32J9oxqK4RWZhU9NKFa4Np+GC/1wasjIqygdZFZ/BQq5cNHFhCS8NwtH OZRQ== X-Gm-Message-State: AA+aEWY2y3AIm2nVdQ3uvg+NqIyptyRXPgpNEMyjq4wEbU/NY0tMokGl 1GWIkUad91fzx9PObocvraedyA== X-Google-Smtp-Source: AFSGD/WmE38mMXRhzyTWdIOb/qlrbYporo8xsQ/fSdocyyg3qt/jApzTRCVuQr/jJ4hRx6JHD12GjA== X-Received: by 2002:a62:4e83:: with SMTP id c125mr3126281pfb.101.1542771686140; Tue, 20 Nov 2018 19:41:26 -0800 (PST) Received: from localhost.localdomain ([106.51.20.239]) by smtp.googlemail.com with ESMTPSA id b185sm53870623pga.85.2018.11.20.19.41.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 20 Nov 2018 19:41:25 -0800 (PST) From: Anup Patel To: Rick Chen Date: Wed, 21 Nov 2018 09:11:09 +0530 Message-Id: <20181121034112.7136-1-anup@brainfault.org> X-Mailer: git-send-email 2.17.1 Cc: U-Boot Mailing List , Palmer Dabbelt , Alexander Graf , Christoph Hellwig , Atish Patra Subject: [U-Boot] [PATCH v3 0/3] RISC-V S-mode support 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" This patchset allows us runing u-boot in S-mode which is useful on platforms where M-mode runtime firmware is an independent firmware and u-boot is used as last stage OS bootloader. The patchset based upon git://git.denx.de/u-boot-riscv.git and is tested on QEMU in both M-mode and S-mode. For S-mode testing, we have used u-boot.bin as payload of latest BBL (at commit 6ebd0f2a46255d0c76dad3c05b16c1d154795d26) applied with following changes: Changes since v2: - Dropped 'default n" from RISCV_SMODE kconfig option - Replaced '-smode_' in defconfig names with '_smode_' Changes since v1: - Rebased upon latest git://git.denx.de/u-boot-riscv.git - Add details in cover letter for running u-boot in S-mode using BBL Anup Patel (3): riscv: Add kconfig option to run u-boot in S-mode riscv: qemu: Use different SYS_TEXT_BASE for S-mode riscv: Add S-mode defconfigs for QEMU virt machine arch/riscv/Kconfig | 5 ++++ arch/riscv/cpu/start.S | 33 ++++++++++++++++++++++++++ board/emulation/qemu-riscv/Kconfig | 3 ++- board/emulation/qemu-riscv/MAINTAINERS | 2 ++ configs/qemu-riscv32_smode_defconfig | 10 ++++++++ configs/qemu-riscv64_smode_defconfig | 11 +++++++++ 6 files changed, 63 insertions(+), 1 deletion(-) create mode 100644 configs/qemu-riscv32_smode_defconfig create mode 100644 configs/qemu-riscv64_smode_defconfig diff --git a/machine/emulation.c b/machine/emulation.c index 132e977..def75e1 100644 --- a/machine/emulation.c +++ b/machine/emulation.c @@ -162,6 +162,12 @@ static inline int emulate_read_csr(int num, uintptr_t mstatus, uintptr_t* result switch (num) { + case CSR_MISA: + *result = read_csr(misa); + return 0; + case CSR_MHARTID: + *result = read_csr(mhartid); + return 0; case CSR_CYCLE: if (!((counteren >> (CSR_CYCLE - CSR_CYCLE)) & 1)) return -1;