From nobody Mon Feb 9 15:11:13 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) client-ip=66.175.222.108; envelope-from=bounce+27952+69197+1787277+3901457@groups.io; helo=mail02.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+69197+1787277+3901457@groups.io ARC-Seal: i=1; a=rsa-sha256; t=1608301002; cv=none; d=zohomail.com; s=zohoarc; b=H5EllFILHHReRYquAxewJuJZ8WSOvjzikGDSBD+ePKdH8oP4JwMdV5d5I6ic8J1BrGmoqIl2Ba752R6l8i0BPC2dgP2UusREelNXQD0O7qigDRvYAx5l6J8g+F5CJk6EdkCgpi8IWUlpLSEa4fw3G/KoiV6zrNURjUHtw2FHTnE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1608301002; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Id:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=K8VxZJW9KthsD/M4FbYBS8xWkAdQp7L/dazQNLvuwvE=; b=EucMEBRQjAj8/66PGjPKf1wK+zypZ6m9J50cppu4+tGGikx98gw7DntKi5HdCrZK/BdzwiSSipam9ThKzHSJ8IajhwU1sHTEve8oPyrfqjHHqE5KgukkpSlvlEQoMUmHn9QG+CHT9VJCsWvjV1J7A3gNjcEsb8PwQE60DDn65DY= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+69197+1787277+3901457@groups.io Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 160830100274781.87766563028083; Fri, 18 Dec 2020 06:16:42 -0800 (PST) Return-Path: X-Received: by 127.0.0.2 with SMTP id 0GymYY1788612xVCA8928gyl; Fri, 18 Dec 2020 06:16:41 -0800 X-Received: from mail-wr1-f52.google.com (mail-wr1-f52.google.com [209.85.221.52]) by mx.groups.io with SMTP id smtpd.web11.10539.1608300981232356330 for ; Fri, 18 Dec 2020 06:16:21 -0800 X-Received: by mail-wr1-f52.google.com with SMTP id 91so2335062wrj.7 for ; Fri, 18 Dec 2020 06:16:21 -0800 (PST) X-Gm-Message-State: a85upKNG7uT2BxAG6km9M9U5x1787277AA= X-Google-Smtp-Source: ABdhPJym+4cZCQTw81pAWmwUmrLykEy9Nhnfcxyc4wU6RCS16XscGk92Dq6adhc9QLR+5o75SGQJtQ== X-Received: by 2002:a5d:5049:: with SMTP id h9mr4954342wrt.404.1608300979527; Fri, 18 Dec 2020 06:16:19 -0800 (PST) X-Received: from vanye.hemma.eciton.net (cpc1-cmbg19-2-0-cust915.5-4.cable.virginm.net. [82.27.183.148]) by smtp.gmail.com with ESMTPSA id b12sm18558569wmj.2.2020.12.18.06.16.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Dec 2020 06:16:18 -0800 (PST) From: "Leif Lindholm" To: devel@edk2.groups.io Cc: Ard Biesheuvel Subject: [edk2-devel] [PATCH 1/9] ArmPkg/ArmLib: add ArmHasGicSystemRegisters () helper function Date: Fri, 18 Dec 2020 14:16:09 +0000 Message-Id: <20201218141617.26947-2-leif@nuviainc.com> In-Reply-To: <20201218141617.26947-1-leif@nuviainc.com> References: <20201218141617.26947-1-leif@nuviainc.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,leif@nuviainc.com Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1608301001; bh=+5lSPCVdM73x1OBbfierOrGjxF507vu09r9MdRJ2OIM=; h=Cc:Date:From:Reply-To:Subject:To; b=Gt8NCVhl5qoeOFNgXBbjvuROnbFThtWEdlZ9Getcs/gMG3iP/Pz6TaMH3Q/GK17SS+W j0QpitYIFLrw0ByMab6EqY+AnBSWK9I8iv7phO02Ankn2NyjzdBN8vOdi6pJH4AZBQc48 vC50dr+jdrzpsFt1fndxFCnZp1/+nks58b0= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Type: text/plain; charset="utf-8" Create a helper function to eliminate direct feature register reading, which gets messy in code shared between ARM/AArch64. Returns BOOLEAN True if the CPU implements the GIC System Register Interface (any version), otherwise returns BOOL False. Cc: Ard Biesheuvel Signed-off-by: Leif Lindholm --- ArmPkg/Include/Library/ArmLib.h | 18 ++++++++++++++++++ ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c | 16 ++++++++++++++++ ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c | 16 ++++++++++++++++ 3 files changed, 50 insertions(+) diff --git a/ArmPkg/Include/Library/ArmLib.h b/ArmPkg/Include/Library/ArmLi= b.h index 5a27b7c2fc27..8a364f2ca96f 100644 --- a/ArmPkg/Include/Library/ArmLib.h +++ b/ArmPkg/Include/Library/ArmLib.h @@ -2,6 +2,7 @@ =20 Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
Copyright (c) 2011 - 2016, ARM Ltd. All rights reserved.
+ Copyright (c) 2020, NUVIA Inc. All rights reserved.
=20 SPDX-License-Identifier: BSD-2-Clause-Patent =20 @@ -715,4 +716,21 @@ ArmGetPhysicalAddressBits ( VOID ); =20 + +/// +/// ID Register Helper functions +/// + +/** + Check whether the CPU supports the GIC system register interface (any ve= rsion) + + @return Whether GIC System Register Interface is supported + +**/ +BOOLEAN +EFIAPI +ArmHasGicSystemRegisters ( + VOID + ); + #endif // __ARM_LIB__ diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c b/ArmPkg/Library/Ar= mLib/AArch64/AArch64Lib.c index 3fbd591192e2..5b10eb33c97d 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c @@ -2,6 +2,7 @@ =20 Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.
+ Copyright (c) 2020, NUVIA Inc. All rights reserved.
=20 SPDX-License-Identifier: BSD-2-Clause-Patent =20 @@ -71,3 +72,18 @@ ArmCleanDataCache ( ArmDataSynchronizationBarrier (); AArch64DataCacheOperation (ArmCleanDataCacheEntryBySetWay); } + +/** + Check whether the CPU supports the GIC system register interface (any ve= rsion) + + @return Whether GIC System Register Interface is supported + +**/ +BOOLEAN +EFIAPI +ArmHasGicSystemRegisters ( + VOID + ) +{ + return ((ArmReadIdPfr0 () & AARCH64_PFR0_GIC) !=3D 0); +} diff --git a/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c b/ArmPkg/Library/ArmLib/A= rm/ArmV7Lib.c index 2c4a23e1a1b2..3faada3a6539 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c +++ b/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c @@ -2,6 +2,7 @@ =20 Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
Copyright (c) 2011 - 2014, ARM Limited. All rights reserved. + Copyright (c) 2020, NUVIA Inc. All rights reserved.
=20 SPDX-License-Identifier: BSD-2-Clause-Patent =20 @@ -71,3 +72,18 @@ ArmCleanDataCache ( ArmDataSynchronizationBarrier (); ArmV7DataCacheOperation (ArmCleanDataCacheEntryBySetWay); } + +/** + Check whether the CPU supports the GIC system register interface (any ve= rsion) + + @return Whether GIC System Register Interface is supported + +**/ +BOOLEAN +EFIAPI +ArmHasGicSystemRegisters ( + VOID + ) +{ + return ((ArmReadIdPfr1 () & ARM_PFR1_GIC) !=3D 0); +} --=20 2.20.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#69197): https://edk2.groups.io/g/devel/message/69197 Mute This Topic: https://groups.io/mt/79061631/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-