87 lines
2 KiB
C
87 lines
2 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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dynsysres.c
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Abstract:
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This module contain functions which support dynamic system
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resources e.g. processors, memory, and I/O. Among other things,
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it will contain code necessary to configure the OS for the
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'capacity' of a partition rather than the boot resources.
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Author:
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Adam Glass
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#include "halp.h"
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#include "acpitabl.h"
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#include "xxacpi.h"
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#if defined(_WIN64)
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#define HalpGetAcpiTablePhase0 HalpGetAcpiTable
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#endif
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PHYSICAL_ADDRESS HalpMaxHotPlugMemoryAddress;
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VOID
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HalpGetHotPlugMemoryInfo(
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IN PLOADER_PARAMETER_BLOCK LoaderBlock
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)
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{
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PHYSICAL_ADDRESS Extent;
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PACPI_SRAT_ENTRY SratEntry;
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PACPI_SRAT_ENTRY SratEnd;
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PACPI_SRAT SratTable;
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SratTable = HalpGetAcpiTablePhase0(LoaderBlock, ACPI_SRAT_SIGNATURE);
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if (SratTable == NULL) {
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return;
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}
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//
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// The Static Resource Affinity Table (SRAT) exists.
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//
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// Scan it to determine if there are any hot plug memory regions.
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//
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SratEnd = (PACPI_SRAT_ENTRY)(((PUCHAR)SratTable) +
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SratTable->Header.Length);
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for (SratEntry = (PACPI_SRAT_ENTRY)(SratTable + 1);
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SratEntry < SratEnd;
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SratEntry = (PACPI_SRAT_ENTRY)(((PUCHAR) SratEntry) + SratEntry->Length)) {
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switch (SratEntry->Type) {
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case SratMemory:
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Extent.QuadPart = SratEntry->MemoryAffinity.Base.QuadPart +
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SratEntry->MemoryAffinity.Length;
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if (SratEntry->MemoryAffinity.Flags.HotPlug &&
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SratEntry->MemoryAffinity.Flags.Enabled &&
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(Extent.QuadPart > HalpMaxHotPlugMemoryAddress.QuadPart)) {
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HalpMaxHotPlugMemoryAddress = Extent;
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}
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break;
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}
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}
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}
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VOID
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HalpDynamicSystemResourceConfiguration(
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IN PLOADER_PARAMETER_BLOCK LoaderBlock
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)
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{
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HalpGetHotPlugMemoryInfo(LoaderBlock);
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}
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