mirror of https://github.com/acidanthera/audk.git
116 lines
3.6 KiB
Plaintext
116 lines
3.6 KiB
Plaintext
/** @file
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The definition block in ACPI table for PRM Operation Region
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Copyright (c) 2020-2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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DefinitionBlock (
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"Prm.aml",
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"SSDT",
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2,
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"OEMID ",
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"PRMOPREG",
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0x1000
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)
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{
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Scope (\_SB)
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{
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//
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// PRM Test Device
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//
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Device (PRMT)
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{
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Name (_HID, "80860223")
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Name (_CID, "80860223")
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Name (_DDN, "PRM Test Device")
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//PRM operation region format
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OperationRegion (PRMR, PlatformRtMechanism, 0, 1)
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Field (PRMR, BufferAcc, NoLock, Preserve) //Make it ByteAcc for parameter validation
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{
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PRMF, 8
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}
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/*
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* Control method to invoke PRM OperationRegion handler
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* Arg0 contains a buffer representing a _DSM GUID
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*/
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Method (RUNS, 1)
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{
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/* Local0 is the PRM data buffer */
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Local0 = buffer (26){}
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/* Create byte fields over the buffer */
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CreateByteField (Local0, 0x0, PSTA)
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CreateQWordField (Local0, 0x1, USTA)
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CreateByteField (Local0, 0x9, CMD)
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CreateField (Local0, 0x50, 0x80, GUID)
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/* Fill in the command and data fields of the data buffer */
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CMD = 0 // run command
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GUID = Arg0
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/* Invoke PRM OperationRegion Handler and store the result into Local0 */
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Local0 = (PRMF = Local0)
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/* Return status */
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Return (PSTA)
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}
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/*
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* Control method to lock a PRM transaction
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* Arg0 contains a buffer representing a _DSM GUID
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*/
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Method (LCKH, 1)
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{
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/* Local0 is the PRM data buffer */
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Local0 = buffer (26){}
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/* Create byte fields over the buffer */
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CreateByteField (Local0, 0x0, STAT)
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CreateByteField (Local0, 0x9, CMD)
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CreateField (Local0, 0x50, 0x80, GUID)
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CMD = 1 // Lock command
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GUID = Arg0
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Local0 = (PRMF = Local0)
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/* Note STAT contains the return status */
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Return (STAT)
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}
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/*
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* Control method to unlock a PRM transaction
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* Arg0 contains a buffer representing a _DSM GUID
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*/
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Method (ULCK, 1)
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{
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/* Local0 is the PRM data buffer */
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Local0 = buffer (26){}
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/* Create byte fields over the buffer */
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CreateByteField (Local0, 0x0, STAT)
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CreateByteField (Local0, 0x9, CMD)
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CreateField (Local0, 0x50, 0x80, GUID)
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CMD = 2 // Unlock command
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GUID = Arg0
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Local0 = (PRMF = Local0)
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/* Note STAT contains the return status */
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Return (STAT)
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}
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/*
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*Bit [0] Set if the device is present.
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*Bit [1] Set if the device is enabled and decoding its resources.
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*Bit [2] Set if the device should be shown in the UI.
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*Bit [3] Set if the device is functioning properly (cleared if device failed its diagnostics).
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*/
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Method (_STA, 0, NotSerialized)
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{
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Return (0x0B) // Device present, but not shown
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}
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}
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}
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}
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