/** @file
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ACPI DSDT table
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Copyright (c) 2019, 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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// Define Port 80 as an ACPI Operating Region to use for debugging. Please
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// note that the Intel CRBs have the ability to ouput a Word to
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// Port 80h for debugging purposes, so the model implemented here may not be
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// able to be used on OEM Designs.
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OperationRegion(PRT0,SystemIO,0x80,2)
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Field(PRT0,WordAcc,Lock,Preserve)
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{
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P80B, 16
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}
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// Port 80h Update:
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// Update 2 bytes of Port 80h.
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//
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// Arguments:
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// Arg0: 0 = Write Port 80h
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// 1 = Write Port 81h
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// Arg1: 8-bit Value to write
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//
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// Return Value:
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// None
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Name(P80T, 0) // temp buffer for P80
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Method(D8XH,2,Serialized)
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{
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If(LEqual(Arg0,0)) // Write Port 80h
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{
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Store(Or(And(P80T,0xFF00),Arg1),P80T)
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}
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If(LEqual(Arg0,1)) // Write Port 81h
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{
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Store(Or(And(P80T,0x00FF),ShiftLeft(Arg1,8)),P80T)
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}
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Store(P80T,P80B)
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}
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//
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// Define SW SMI port as an ACPI Operating Region to use for generate SW SMI.
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//
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OperationRegion(SPRT,SystemIO, 0xB2,2)
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Field (SPRT, ByteAcc, Lock, Preserve) {
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SSMP, 8
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}
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// The _PIC Control Method is optional for ACPI design. It allows the
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// OS to inform the ASL code which interrupt controller is being used,
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// the 8259 or APIC. The reference code in this document will address
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// PCI IRQ Routing and resource allocation for both cases.
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//
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// The values passed into _PIC are:
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// 0 = 8259
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// 1 = IOAPIC
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Method(\_PIC,1)
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{
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Store(Arg0,PICM)
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}
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Scope (\)
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{
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//
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// Global Name, returns current Interrupt controller mode;
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// updated from _PIC control method
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//
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Name(PICM, 0)
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}
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