From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 31B1EC433EF for ; Fri, 14 Jan 2022 10:59:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BzBXYWRO/aPcTCQZC7mpEnK/XmJOvxVTptZoi/DD8jg=; b=J+0a67O3WL8SaL qRz7L7ygktZ9EvH65mU6P8+/ualwrbKS9SHhQ1bim19mG1mC8qxZqYYYK7JIr03e19slqEb38ZK4s /YD07ERAUuVRZmjZgBo2eVyDt26lsQ02rTrl9xNvdN6/VmF4AdGm0A+N63bDnvFf6wLuGBgx1M4Mj ZFFXRUFGXWph35uz8pZO/h1A8IBgKrPprf3mkUHDXD23FMlht9AWeCuOhAKf9ONNNCp5//F7vm7Uh j7Jipld3CXmdVRXsz9v/2UCYdoq3jpYdn1JqQAaIazSgA0EcGl/Vf6TTKk9KLfGSMX8U9FpsKwqmV Ctj75IWdci4ck27NNAvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n8KHh-008oWy-2C; Fri, 14 Jan 2022 10:58:17 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n8KGd-008o5P-KK for linux-arm-kernel@lists.infradead.org; Fri, 14 Jan 2022 10:57:13 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DD6FA101E; Fri, 14 Jan 2022 02:57:10 -0800 (PST) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D3D753F766; Fri, 14 Jan 2022 02:57:09 -0800 (PST) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: andre.przywara@arm.com, Jaxson.Han@arm.com, mark.rutland@arm.com, robin.murphy@arm.com, vladimir.murzin@arm.com, Wei.Chen@arm.com Subject: [bootwrapper PATCH v2 05/13] aarch64: add mov_64 macro Date: Fri, 14 Jan 2022 10:56:45 +0000 Message-Id: <20220114105653.3003399-6-mark.rutland@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220114105653.3003399-1-mark.rutland@arm.com> References: <20220114105653.3003399-1-mark.rutland@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220114_025711_755786_7B5345CB X-CRM114-Status: GOOD ( 11.24 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In subsequent patches we'll need to load 64-bit values into GPRs before the CPU is in a known endianness, where we cannot use literal pools. In preparation for that, this patch adds a new `mov_64` macro to load a 64-bit value into a GPR using a sequence of MOV and MOVKs, which will function the same regardless of the CPU's endianness. At the same time, move the `cpuid` macro to use `mov_64` internally. Signed-off-by: Mark Rutland --- arch/aarch64/common.S | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/aarch64/common.S b/arch/aarch64/common.S index c7171a9..3279fa9 100644 --- a/arch/aarch64/common.S +++ b/arch/aarch64/common.S @@ -9,9 +9,17 @@ #include + /* Load a 64-bit value using immediates */ + .macro mov_64 dest, val + mov \dest, #(((\val) >> 0) & 0xffff) + movk \dest, #(((\val) >> 16) & 0xffff), lsl #16 + movk \dest, #(((\val) >> 32) & 0xffff), lsl #32 + movk \dest, #(((\val) >> 48) & 0xffff), lsl #48 + .endm + /* Put MPIDR into \dest, clobber \tmp and flags */ .macro cpuid dest, tmp mrs \dest, mpidr_el1 - ldr \tmp, =MPIDR_ID_BITS + mov_64 \tmp, MPIDR_ID_BITS ands \dest, \dest, \tmp .endm -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel