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89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Source File for MADT Table parsing
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* COPYRIGHT: Copyright 2021 Justin Miller <justinmiller100@gmail.com>
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*/
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/* INCLUDES *******************************************************************/
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#include <hal.h>
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#include <acpi.h>
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/* ACPI_BIOS_ERROR defined in acoutput.h and bugcodes.h */
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#undef ACPI_BIOS_ERROR
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#include <smp.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS ********************************************************************/
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PROCESSOR_IDENTITY HalpStaticProcessorIdentity[MAXIMUM_PROCESSORS] = {{0}};
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PPROCESSOR_IDENTITY HalpProcessorIdentity = NULL;
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HALP_APIC_INFO_TABLE HalpApicInfoTable;
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ACPI_TABLE_MADT *MadtTable;
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ACPI_SUBTABLE_HEADER *AcpiHeader;
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ACPI_MADT_LOCAL_APIC *LocalApic;
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/* FUNCTIONS ******************************************************************/
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VOID
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HalpParseApicTables(
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_In_ PLOADER_PARAMETER_BLOCK LoaderBlock)
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{
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ULONG_PTR TableEnd;
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ULONG ValidProcessorCount;
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/* We only support legacy APIC for now, this will be updated in the future */
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HalpApicInfoTable.ApicMode = 0x10;
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MadtTable = HalAcpiGetTable(LoaderBlock, 'CIPA');
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AcpiHeader = (ACPI_SUBTABLE_HEADER*)MadtTable;
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AcpiHeader->Length = sizeof(ACPI_TABLE_MADT);
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TableEnd = (ULONG_PTR)MadtTable + MadtTable->Header.Length;
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HalpApicInfoTable.ProcessorCount = 0;
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HalpProcessorIdentity = HalpStaticProcessorIdentity;
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AcpiHeader = (ACPI_SUBTABLE_HEADER*)MadtTable;
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AcpiHeader->Length = sizeof(ACPI_TABLE_MADT);
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TableEnd = (ULONG_PTR)MadtTable + MadtTable->Header.Length;
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while ((ULONG_PTR)AcpiHeader <= TableEnd)
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{
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LocalApic = (ACPI_MADT_LOCAL_APIC*)AcpiHeader;
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if (LocalApic->Header.Type == ACPI_MADT_TYPE_LOCAL_APIC &&
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LocalApic->Header.Length == sizeof(ACPI_MADT_LOCAL_APIC))
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{
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ValidProcessorCount = HalpApicInfoTable.ProcessorCount;
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HalpProcessorIdentity[ValidProcessorCount].LapicId = LocalApic->Id;
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HalpProcessorIdentity[ValidProcessorCount].ProcessorId = LocalApic->ProcessorId;
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HalpApicInfoTable.ProcessorCount++;
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AcpiHeader = (ACPI_SUBTABLE_HEADER*)((ULONG_PTR)AcpiHeader + AcpiHeader->Length);
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}
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else
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{
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/* End the parsing early if we don't use the currently selected table */
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AcpiHeader = (ACPI_SUBTABLE_HEADER*)((ULONG_PTR)AcpiHeader + 1);
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}
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}
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}
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VOID
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HalpPrintApicTables(VOID)
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{
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UINT32 i;
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DPRINT1("HAL has detected a physical processor count of: %d\n", HalpApicInfoTable.ProcessorCount);
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for (i = 0; i < HalpApicInfoTable.ProcessorCount; i++)
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{
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DPRINT1("Information about the following processor is for processors number: %d\n"
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" The BSPCheck is set to: %X\n"
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" The LapicID is set to: %X\n",
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i, HalpProcessorIdentity[i].BSPCheck, HalpProcessorIdentity[i].LapicId);
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}
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}
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