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X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB4275 X-MS-Exchange-Transport-CrossTenantHeadersStripped: VE1EUR03FT048.eop-EUR03.prod.protection.outlook.com X-MS-Office365-Filtering-Correlation-Id-Prvs: 2177e170-fb0f-4d43-cfce-08d8e31ab803 X-Microsoft-Antispam-Message-Info: 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 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Mar 2021 16:45:25.9745 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 022805de-8a5c-4911-17b9-08d8e31abd83 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT048.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR3PR08MB5643 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,joey.gouly@arm.com X-Gm-Message-State: ki9SIZJ6QazdCt03mhkSkf1Mx1787277AA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1615308331; bh=K7B8Ve1TYEwnZsGDQnDzZ4T3Xgyjtc4Q5oS84Cn2pk8=; h=CC:Content-Type:Date:From:Reply-To:Subject:To; b=XccdRQ1FuREJemptXsyUgXogeKF7XfLpzjz5G2eaeGSmI+L4yoJrhs4gE260oobW9pK tBNBGUwTIgRhfbWag0V7tODHygPNZZZJRkeQWZfKMP09WKkkZIzWeJorSyaqRT/iBlNOK dZLoIqFUj1f8ZJ2rWwK8RTQXCTV1TzbwnSQ= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Andreas Sandberg The GICv3 architecture supports up to 1020 ordinary interrupt lines. The actual number of interrupts supported is described by the ITLinesNumber field in the GICD_TYPER register. The total number of implemented registers is normally calculated as 32*(ITLinesNumber+1). However, maximum value (0x1f) is a special case since that would indicate that 1024 interrupts are implemented. Add handling for this special case in ArmGicGetMaxNumInterrupts. Signed-off-by: Andreas Sandberg Signed-off-by: Joey Gouly Reviewed-by: Ard Biesheuvel --- The changes can be seen at https://github.com/jgouly/edk2/tree/1396_gic_max= _num_intr_v1 ArmPkg/Drivers/ArmGic/ArmGicLib.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/ArmPkg/Drivers/ArmGic/ArmGicLib.c b/ArmPkg/Drivers/ArmGic/ArmG= icLib.c index 6b01c88206ad8adef3100dd44c0d57660db77783..c4996970eb299776552fe7b54f3= 4fd5a68afff29 100644 --- a/ArmPkg/Drivers/ArmGic/ArmGicLib.c +++ b/ArmPkg/Drivers/ArmGic/ArmGicLib.c @@ -1,6 +1,6 @@ /** @file * -* Copyright (c) 2011-2018, ARM Limited. All rights reserved. +* Copyright (c) 2011-2021, ARM Limited. All rights reserved. * * SPDX-License-Identifier: BSD-2-Clause-Patent * @@ -120,7 +120,12 @@ ArmGicGetMaxNumInterrupts ( IN INTN GicDistributorBase ) { - return 32 * ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F) = + 1); + UINTN ItLines; + + ItLines =3D MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F; + + // Interrupt ID 1020-1023 are reserved; + return (ItLines =3D=3D 0x1f) ? 1020 : 32 * (ItLines + 1); } =20 VOID --=20 Guid("CE165669-3EF3-493F-B85D-6190EE5B9759") -=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 (#72596): https://edk2.groups.io/g/devel/message/72596 Mute This Topic: https://groups.io/mt/81205553/1787277 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-