From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-sender-0.a4lg.com (mail-sender-0.a4lg.com [IPv6:2401:2500:203:30b:4000:6bfe:4757:0]) by sourceware.org (Postfix) with ESMTPS id 4DD1B384EF6C for ; Tue, 29 Nov 2022 01:21:57 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 4DD1B384EF6C Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=irq.a4lg.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=irq.a4lg.com Received: from [127.0.0.1] (localhost [127.0.0.1]) by mail-sender-0.a4lg.com (Postfix) with ESMTPSA id B3F86300089; Tue, 29 Nov 2022 01:21:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=irq.a4lg.com; s=2017s01; t=1669684915; bh=yJYROxBTUx7OB4KShO0WPzBMZEUiTvF96ezwzU3z7Fg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Mime-Version:Content-Transfer-Encoding; b=njie+Q4rNCQDD3+hC6QQPYMWh9tYuOBML6wxdVGaItxg7fXcC3ZoHmDSeO8DAClxi gDcW9Uyi3biwPPJsU28mNJh64K9S54hOlHD5KrAwU5gCCqsW7qhkPph35/KaaauImW EYwYxCnx7V8Cjds3RsgMM2UqxNvDrfBGLMbokoP8= From: Tsukasa OI To: Tsukasa OI Cc: binutils@sourceware.org Subject: [REVIEW ONLY 0/1] RISC-V (unratified): Add 'Smrnmi' extension Date: Tue, 29 Nov 2022 01:21:50 +0000 Message-Id: In-Reply-To: References: Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-6.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: *** WAIT FOR SPECIFICATION FREEZE *** This is an implementation for unratified and not frozen RISC-V extension and not intended to be merged for now. The only intent to submit this patchset is to test new instructions for your (possibly virtual) environment and early review for fast adoption after ratification. This is the review-only PATCH v2 to keep track with latest GNU Binutils. In this version, a dependency to 'Zicsr' is added. This patchset adds following unratified extension to GNU Binutils: - Smrnmi (Resumable NMI) version 0.4 (may change on ratification) ... which adds "mnret" instruction and 4 CSRs related to RNMI. This extension provides "resumable NMIs" to provide special non-maskable interrupts (NMIs) with "resume" capability (normally, NMIs are are only used for hardware error conditions and not resumable; however on some conditions, there are some cases where using NMIs fits better yet resumable after proper handling by the NMI handler [which may fail though]). This is based on a draft version of the RISC-V ISA Manual: Note that it has **different** CSR values between proposed RNMI version 0.4 and RNMI as optionally implemented in SiFive U74-MC: | CSR | proposed | SiFive | | --------- | -------- | ------ | | mnscratch | 0x740 | 0x350 | | mnepc | 0x741 | 0x351 | | mncause | 0x742 | 0x352 | | mnstatus | 0x744 | 0x353 | Also, although that 4 CSRs are assigned with actual numbers (this is why I'm not attaching "CSR instantiation" script in this patchset), it may be changed before ratification. Be careful. Tsukasa OI (1): UNRATIFIED RISC-V: Add 'Smrnmi' extension and its CSRs bfd/elfxx-riscv.c | 6 ++++++ gas/config/tc-riscv.c | 4 ++++ gas/testsuite/gas/riscv/csr-dw-regnums.d | 4 ++++ gas/testsuite/gas/riscv/csr-dw-regnums.s | 5 +++++ gas/testsuite/gas/riscv/csr-version-1p10.d | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p10.l | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p11.d | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p11.l | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p12.d | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p12.l | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p9p1.d | 8 ++++++++ gas/testsuite/gas/riscv/csr-version-1p9p1.l | 8 ++++++++ gas/testsuite/gas/riscv/csr.s | 6 ++++++ gas/testsuite/gas/riscv/smrnmi-noarch.d | 3 +++ gas/testsuite/gas/riscv/smrnmi-noarch.l | 2 ++ gas/testsuite/gas/riscv/smrnmi.d | 10 ++++++++++ gas/testsuite/gas/riscv/smrnmi.s | 2 ++ include/opcode/riscv-opc.h | 15 +++++++++++++++ include/opcode/riscv.h | 1 + opcodes/riscv-opc.c | 3 +++ 20 files changed, 125 insertions(+) create mode 100644 gas/testsuite/gas/riscv/smrnmi-noarch.d create mode 100644 gas/testsuite/gas/riscv/smrnmi-noarch.l create mode 100644 gas/testsuite/gas/riscv/smrnmi.d create mode 100644 gas/testsuite/gas/riscv/smrnmi.s base-commit: cb44f89ce977b1ab2d4063f2487950bddfb75bc7 -- 2.38.1