From nobody Tue Feb 10 06:07:22 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+75557+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+75557+1787277+3901457@groups.io; dmarc=fail(p=none dis=none) header.from=arm.com ARC-Seal: i=1; a=rsa-sha256; t=1621940298; cv=none; d=zohomail.com; s=zohoarc; b=fH/cqh5LnbSPevgtQZNf5aTINh+VGGsYEskApSkU6BCZah6ZaFnLv6JtRIpTiLtsXCiEBwXmpUUW5qCn450hC/iZ7HDy9NPIhtpPpMEsHHIQpRJVHCaWD4R1qbl4aYZlVBqa5RWmdkSKj1h+l1xFC5UW9zxYZSDu0vnH1oY/CSg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1621940298; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=xvWihK8MRRwPorHZ/G3JU73f+pWsKx780zosL8MeIdg=; b=fEf35Gd0wfbYfc7PaK4DHA9j4MUH8PZtrXAoHqvdrmIXizWkmfEruh6HkkH6JyEVwCmJm/eaVsWW03/eNNVsb9Loj2gHhulau+UiUy06XC3KDhw+KrWRVmDWZo6iLoeps5/YTJankKoryJlnYc239eF3VOIrXeqoyEVNMBjTn28= 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+75557+1787277+3901457@groups.io; dmarc=fail header.from= (p=none dis=none) header.from= Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 162194029841566.23127745172451; Tue, 25 May 2021 03:58:18 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id N7Y5YY1788612xW9xcMVneVm; Tue, 25 May 2021 03:58:17 -0700 X-Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mx.groups.io with SMTP id smtpd.web10.8012.1621940292418862693 for ; Tue, 25 May 2021 03:58:12 -0700 X-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 1D129D6E; Tue, 25 May 2021 03:58:12 -0700 (PDT) X-Received: from usa.arm.com (a074742.blr.arm.com [10.162.16.32]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E6EE73F719; Tue, 25 May 2021 03:58:10 -0700 (PDT) From: "Pranav Madhu" To: devel@edk2.groups.io Cc: Ard Biesheuvel , Sami Mujawar Subject: [edk2-devel] [edk2-platforms][PATCH V2 3/6] Platform/Sgi: Low Power Idle states for RD-N2-Cfg1 Date: Tue, 25 May 2021 16:27:58 +0530 Message-Id: <20210525105801.13793-4-pranav.madhu@arm.com> In-Reply-To: <20210525105801.13793-1-pranav.madhu@arm.com> References: <20210525105801.13793-1-pranav.madhu@arm.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: 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,pranav.madhu@arm.com X-Gm-Message-State: 2czGMtPkL2gOR5mx11DvA3zvx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1621940297; bh=AzJqK5PWRxTHJUVDbSs0uMVmahS7TGS6LtufrhJtd1c=; h=Cc:Date:From:Reply-To:Subject:To; b=gHavE1G1ZgydxZqOKqiEp25kb4tOkitrwqDjxS17B2QCi/+bHW9i8shHhe2DEgoLfI/ qN3NVs4oMRFImTn0nRjTu5bcfBVQ7Uo5Hl8vcUgK90eiEWMfmNJutuDwlHggKXrnaaHu4 wDWwv1/Fh9E933sK07bMUx0YQE6dG2sP0rw= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Type: text/plain; charset="utf-8" RD-N2-Cfg1 platform supports 2 LPI states, LPI1 (Standby WFI) and LPI3 (Power-down) and the cluster supports LPI2 (Power-down) state. The LPI implementation also supports combined power state for core and cluster. Signed-off-by: Pranav Madhu Reviewed-by: Sami Mujawar --- Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl | 158 ++++++++++++++++++++ 1 file changed, 158 insertions(+) diff --git a/Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl b/Platform/AR= M/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl index d68523bc43ed..55f51cc26aff 100644 --- a/Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl +++ b/Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl @@ -19,91 +19,249 @@ DefinitionBlock ("DsdtTable.aml", "DSDT", 2, "ARMLTD", "ARMSGI", EFI_ACPI_ARM_OEM_REVISION) { Scope (_SB) { + /* _OSC: Operating System Capabilities */ + Method (_OSC, 4, Serialized) { + CreateDWordField (Arg3, 0x00, STS0) + CreateDWordField (Arg3, 0x04, CAP0) + + /* Platform-wide Capabilities */ + If (LEqual (Arg0, ToUUID("0811b06e-4a27-44f9-8d60-3cbbc22e7b48"))) { + /* OSC rev 1 supported, for other version, return failure */ + If (LEqual (Arg1, One)) { + And (STS0, Not (OSC_STS_MASK), STS0) + + If (And (CAP0, OSC_CAP_OS_INITIATED_LPI)) { + /* OS initiated LPI not supported */ + And (CAP0, Not (OSC_CAP_OS_INITIATED_LPI), CAP0) + Or (STS0, OSC_STS_CAPABILITY_MASKED, STS0) + } + } Else { + And (STS0, Not (OSC_STS_MASK), STS0) + Or (STS0, Or (OSC_STS_FAILURE, OSC_STS_UNRECOGNIZED_REV), STS0) + } + } Else { + And (STS0, Not (OSC_STS_MASK), STS0) + Or (STS0, Or (OSC_STS_FAILURE, OSC_STS_UNRECOGNIZED_UUID), STS0) + } + + Return (Arg3) + } + + Name (CLPI, Package () { /* LPI for Cluster, support 1 LPI state */ + 0, // Version + 0, // Level Index + 1, // Count + Package () { // Power Gating state for Cluster + 2500, // Min residency (uS) + 1150, // Wake latency (uS) + 1, // Flags + 1, // Arch Context Flags + 100, // Residency Counter Frequency + 0, // No Parent State + 0x00000020, // Integer Entry method + ResourceTemplate () { // Null Residency Counter + Register (SystemMemory, 0, 0, 0, 0) + }, + ResourceTemplate () { // Null Usage Counter + Register (SystemMemory, 0, 0, 0, 0) + }, + "LPI2-Cluster" + }, + }) + + Name (PLPI, Package () { /* LPI for Processor, support 2 LPI states */ + 0, // Version + 1, // Level Index + 2, // Count + Package () { // WFI for CPU + 1, // Min residency (uS) + 1, // Wake latency (uS) + 1, // Flags + 0, // Arch Context lost Flags (no loss) + 100, // Residency Counter Frequency + 0, // No parent state + ResourceTemplate () { // Register Entry method + Register (FFixedHW, + 32, // Bit Width + 0, // Bit Offset + 0xFFFFFFFF, // Address + 3, // Access Size + ) + }, + ResourceTemplate () { // Null Residency Counter + Register (SystemMemory, 0, 0, 0, 0) + }, + ResourceTemplate () { // Null Usage Counter + Register (SystemMemory, 0, 0, 0, 0) + }, + "LPI1-Core" + }, + Package () { // Power Gating state for CPU + 150, // Min residency (uS) + 350, // Wake latency (uS) + 1, // Flags + 1, // Arch Context lost Flags (Core context los= t) + 100, // Residency Counter Frequency + 1, // Parent node can be in any shallower state + ResourceTemplate () { // Register Entry method + Register (FFixedHW, + 32, // Bit Width + 0, // Bit Offset + 0x40000002, // Address (PwrLvl:core, StateTyp:PwrDn) + 3, // Access Size + ) + }, + ResourceTemplate () { // Null Residency Counter + Register (SystemMemory, 0, 0, 0, 0) + }, + ResourceTemplate () { // Null Usage Counter + Register (SystemMemory, 0, 0, 0, 0) + }, + "LPI3-Core" + }, + }) + Device (CL00) { // Cluster 0 Name (_HID, "ACPI0010") Name (_UID, 0) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP00) { // Neoverse N2 core 0 Name (_HID, "ACPI0007") Name (_UID, 0) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL01) { // Cluster 1 Name (_HID, "ACPI0010") Name (_UID, 1) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP01) { // Neoverse N2 core 1 Name (_HID, "ACPI0007") Name (_UID, 1) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL02) { // Cluster 2 Name (_HID, "ACPI0010") Name (_UID, 2) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP02) { // Neoverse N2 core 2 Name (_HID, "ACPI0007") Name (_UID, 2) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL03) { // Cluster 3 Name (_HID, "ACPI0010") Name (_UID, 3) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP03) { // Neoverse N2 core 3 Name (_HID, "ACPI0007") Name (_UID, 3) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL04) { // Cluster 4 Name (_HID, "ACPI0010") Name (_UID, 4) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP04) { // Neoverse N2 core 4 Name (_HID, "ACPI0007") Name (_UID, 4) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL05) { // Cluster 5 Name (_HID, "ACPI0010") Name (_UID, 5) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP05) { // Neoverse N2 core 5 Name (_HID, "ACPI0007") Name (_UID, 5) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL06) { // Cluster 6 Name (_HID, "ACPI0010") Name (_UID, 6) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP06) { // Neoverse N2 core 6 Name (_HID, "ACPI0007") Name (_UID, 6) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } =20 Device (CL07) { // Cluster 7 Name (_HID, "ACPI0010") Name (_UID, 7) + Method (_LPI, 0, NotSerialized) { + Return (\_SB.CLPI) + } =20 Device (CP07) { // Neoverse N2 core 7 Name (_HID, "ACPI0007") Name (_UID, 7) Name (_STA, 0xF) + + Method (_LPI, 0, NotSerialized) { + Return (\_SB.PLPI) + } } } } // Scope(_SB) --=20 2.17.1 -=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 (#75557): https://edk2.groups.io/g/devel/message/75557 Mute This Topic: https://groups.io/mt/83073012/1787277 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-