3cbfba02fe
https://svn.code.sf.net/p/edk2/code/trunk/edk2/, which are for MinnowBoard MAX open source project. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: David Wei <david.wei@intel.com> Reviewed-by: Mike Wu <mike.wu@intel.com> Reviewed-by: Hot Tian <hot.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16599 6f19259b-4bc3-4df7-8a09-765794883524
242 lines
11 KiB
Plaintext
242 lines
11 KiB
Plaintext
/*-----------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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Intel Silvermont Processor Power Management BIOS Reference Code
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Copyright (c) 2006 - 2014, Intel Corporation
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Filename: CPU0TST.ASL
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Revision: Refer to Readme
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Date: Refer to Readme
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--------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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This Processor Power Management BIOS Source Code is furnished under license
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and may only be used or copied in accordance with the terms of the license.
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The information in this document is furnished for informational use only, is
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subject to change without notice, and should not be construed as a commitment
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by Intel Corporation. Intel Corporation assumes no responsibility or liability
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for any errors or inaccuracies that may appear in this document or any
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software that may be provided in association with this document.
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Except as permitted by such license, no part of this document may be
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reproduced, stored in a retrieval system, or transmitted in any form or by
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any means without the express written consent of Intel Corporation.
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WARNING: You are authorized and licensed to install and use this BIOS code
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ONLY on an IST PC. This utility may damage any system that does not
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meet these requirements.
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An IST PC is a computer which
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(1) Is capable of seamlessly and automatically transitioning among
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multiple performance states (potentially operating at different
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efficiency ratings) based upon power source changes, end user
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preference, processor performance demand, and thermal conditions; and
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(2) Includes an Intel Pentium II processors, Intel Pentium III
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processor, Mobile Intel Pentium III Processor-M, Mobile Intel Pentium 4
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Processor-M, Intel Pentium M Processor, or any other future Intel
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processors that incorporates the capability to transition between
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different performance states by altering some, or any combination of,
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the following processor attributes: core voltage, core frequency, bus
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frequency, number of processor cores available, or any other attribute
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that changes the efficiency (instructions/unit time-power) at which the
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processor operates.
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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NOTES:
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(1) <TODO> - IF the trap range and port definitions do not match those
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specified by this reference code, this file must be modified IAW the
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individual implmentation.
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--------------------------------------------------------------------------------
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------------------------------------------------------------------------------*/
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DefinitionBlock(
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"CPU0TST.aml",
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"SSDT",
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0x01,
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"PmRef",
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"Cpu0Tst",
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0x3000
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)
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{
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External(\_PR.CPU0, DeviceObj)
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External(PDC0)
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External(CFGD)
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External(_PSS)
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Scope(\_PR.CPU0)
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{
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Name(_TPC, 0) // All T-States are available
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//
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// T-State Control/Status interface
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//
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Method(_PTC, 0)
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{
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//
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// IF OSPM is capable of direct access to MSR
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// Report MSR interface
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// ELSE
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// Report I/O interface
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//
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// PDCx[2] = OSPM is capable of direct access to On
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// Demand throttling MSR
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//
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If(And(PDC0, 0x0004)) {
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Return(Package() {
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ResourceTemplate(){Register(FFixedHW, 0, 0, 0)},
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ResourceTemplate(){Register(FFixedHW, 0, 0, 0)}
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})
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}
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}
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// _TSS package for I/O port based T-State control
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// "Power" fields are replaced with real values by the first
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// call of _TSS method.
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//
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Name(TSSI, Package() {
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Package(){100, 1000, 0, 0x00, 0},
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Package(){ 88, 875, 0, 0x0F, 0},
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Package(){ 75, 750, 0, 0x0E, 0},
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Package(){ 63, 625, 0, 0x0D, 0},
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Package(){ 50, 500, 0, 0x0C, 0},
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Package(){ 38, 375, 0, 0x0B, 0},
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Package(){ 25, 250, 0, 0x0A, 0},
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Package(){ 13, 125, 0, 0x09, 0}
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})
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// _TSS package for MSR based T-State control
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// "Power" fields are replaced with real values by the first
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// call of _TSS method.
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//
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Name(TSSM, Package() {
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Package(){100, 1000, 0, 0x00, 0},
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Package(){ 88, 875, 0, 0x1E, 0},
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Package(){ 75, 750, 0, 0x1C, 0},
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Package(){ 63, 625, 0, 0x1A, 0},
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Package(){ 50, 500, 0, 0x18, 0},
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Package(){ 38, 375, 0, 0x16, 0},
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Package(){ 25, 250, 0, 0x14, 0},
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Package(){ 13, 125, 0, 0x12, 0}
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})
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Name(TSSF, 0) // Flag for TSSI/TSSM initialization
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Method(_TSS, 0)
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{
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// Update "Power" fields of TSSI/TSSM with the LFM
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// power data IF _PSS is available
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//
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IF (LAnd(LNot(TSSF),CondRefOf(_PSS)))
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{
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Store(_PSS, Local0)
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Store(SizeOf(Local0), Local1) // _PSS size
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Decrement(Local1) // Index of LFM
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Store(DerefOf(Index(DerefOf(Index(Local0,Local1)),1)), Local2) // LFM Power
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Store(0, Local3)
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While(LLess(Local3, SizeOf(TSSI)))
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{
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Store(Divide(Multiply(Local2, Subtract(8, Local3)), 8),
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Local4) // Power for this TSSI/TSSM entry
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Store(Local4,Index(DerefOf(Index(TSSI,Local3)),1))
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Store(Local4,Index(DerefOf(Index(TSSM,Local3)),1))
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Increment(Local3)
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}
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Store(Ones, TSSF) // TSSI/TSSM are updated
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}
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//
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// IF OSPM is capable of direct access to MSR
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// Report TSSM
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// ELSE
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// Report TSSI
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//
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If(And(PDC0, 0x0004))
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{
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Return(TSSM)
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}
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Return(TSSI)
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}
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Method(_TDL, 0)
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{
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Store ("Cpu0: _TDL Called", Debug)
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Name ( LFMI, 0)
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Store (SizeOf(TSSM), LFMI)
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Decrement(LFMI) // Index of LFM entry in TSSM
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Return(LFMI)
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}
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//
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// T-State Dependency
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//
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Method(_TSD, 0)
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{
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//
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// IF four cores are supported/enabled && !(direct access to MSR)
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// Report 4 processors and SW_ANY as the coordination type
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// ELSE IF two cores are supported/enabled && !(direct access to MSR)
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// Report 2 processors and SW_ANY as the coordination type
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// ELSE
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// Report 1 processor and SW_ALL as the coordination type
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//
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// CFGD[23] = Four cores enabled
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// CFGD[24] = Two or more cores enabled
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// PDCx[2] = OSPM is capable of direct access to On
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// Demand throttling MSR
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//
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If(LAnd(And(CFGD,0x0800000),LNot(And(PDC0,4))))
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{
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Return(Package(){ // SW_ANY
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Package(){
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5, // # entries.
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0, // Revision.
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0, // Domain #.
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0xFD, // Coord Type- SW_ANY
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4 // # processors.
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}
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})
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}
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If(LAnd(And(CFGD,0x1000000),LNot(And(PDC0,4))))
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{
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Return(Package(){ // SW_ANY
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Package(){
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5, // # entries.
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0, // Revision.
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0, // Domain #.
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0xFD, // Coord Type- SW_ANY
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2 // # processors.
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}
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})
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}
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Return(Package(){ // SW_ALL
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Package(){
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5, // # entries.
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0, // Revision.
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0, // Domain #.
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0xFC, // Coord Type- SW_ALL
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1 // # processors.
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}
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})
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}
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}
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} // End of Definition Block
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