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516ccad340
Co-authored-by: Victor Perevertkin <victor.perevertkin@reactos.org> Introduce the initial changes needed to get other processors up and into kernel mode. This only supports x86 as of now but is the first real step towards using other system processors.
122 lines
3.7 KiB
C
122 lines
3.7 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: i386 Application Processor (AP) spinup setup
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* COPYRIGHT: Copyright 2021 Victor Perevertkin <victor.perevertkin@reactos.org>
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* Copyright 2021-2023 Justin Miller <justin.miller@reactos.org>
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*/
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/* INCLUDES ******************************************************************/
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#include <hal.h>
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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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extern PPROCESSOR_IDENTITY HalpProcessorIdentity;
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extern PHYSICAL_ADDRESS HalpLowStubPhysicalAddress;
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extern PVOID HalpLowStub;
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// The data necessary for a boot (stored inside HalpLowStub)
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extern PVOID HalpAPEntry16;
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extern PVOID HalpAPEntryData;
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extern PVOID HalpAPEntry32;
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extern PVOID HalpAPEntry16End;
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extern HALP_APIC_INFO_TABLE HalpApicInfoTable;
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ULONG HalpStartedProcessorCount = 1;
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#ifndef Add2Ptr
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#define Add2Ptr(P,I) ((PVOID)((PUCHAR)(P) + (I)))
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#endif
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#ifndef PtrOffset
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#define PtrOffset(B,O) ((ULONG)((ULONG_PTR)(O) - (ULONG_PTR)(B)))
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#endif
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typedef struct _AP_ENTRY_DATA
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{
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UINT32 Jump32Offset;
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ULONG Jump32Segment;
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PVOID SelfPtr;
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ULONG PageTableRoot;
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PKPROCESSOR_STATE ProcessorState;
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KDESCRIPTOR Gdtr;
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KDESCRIPTOR Idtr;
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} AP_ENTRY_DATA, *PAP_ENTRY_DATA;
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/* FUNCTIONS *****************************************************************/
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static
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ULONG
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HalpSetupTemporaryMappings(
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_In_ PKPROCESSOR_STATE ProcessorState)
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{
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PMMPDE RootPageTable = Add2Ptr(HalpLowStub, PAGE_SIZE);
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PMMPDE LowMapPde = Add2Ptr(HalpLowStub, 2 * PAGE_SIZE);
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PMMPTE LowStubPte = MiAddressToPte(HalpLowStub);
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PHYSICAL_ADDRESS PhysicalAddress;
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ULONG StartPti;
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/* Copy current mappings */
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RtlCopyMemory(RootPageTable, MiAddressToPde(NULL), PAGE_SIZE);
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/* Set up low PDE */
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PhysicalAddress = MmGetPhysicalAddress(LowMapPde);
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RootPageTable[0].u.Hard.PageFrameNumber = PhysicalAddress.QuadPart >> PAGE_SHIFT;
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RootPageTable[0].u.Hard.Valid = 1;
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RootPageTable[0].u.Hard.Write = 1;
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/* Copy low stub PTEs */
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StartPti = MiAddressToPteOffset(HalpLowStubPhysicalAddress.QuadPart);
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ASSERT(StartPti + HALP_LOW_STUB_SIZE_IN_PAGES < 1024);
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for (ULONG i = 0; i < HALP_LOW_STUB_SIZE_IN_PAGES; i++)
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{
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LowMapPde[StartPti + i] = LowStubPte[i];
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}
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PhysicalAddress = MmGetPhysicalAddress(RootPageTable);
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ASSERT(PhysicalAddress.QuadPart < 0x100000000);
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return (ULONG)PhysicalAddress.QuadPart;
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}
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BOOLEAN
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NTAPI
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HalStartNextProcessor(
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_In_ PLOADER_PARAMETER_BLOCK LoaderBlock,
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_In_ PKPROCESSOR_STATE ProcessorState)
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{
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if (HalpStartedProcessorCount == HalpApicInfoTable.ProcessorCount)
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return FALSE;
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// Initalize the temporary page table
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// TODO: clean it up after an AP boots successfully
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ULONG initialCr3 = HalpSetupTemporaryMappings(ProcessorState);
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if (!initialCr3)
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return FALSE;
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// Put the bootstrap code into low memory
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RtlCopyMemory(HalpLowStub, &HalpAPEntry16, (ULONG_PTR)&HalpAPEntry16End - (ULONG_PTR)&HalpAPEntry16);
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// Get a pointer to apEntryData
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PAP_ENTRY_DATA apEntryData = (PVOID)((ULONG_PTR)HalpLowStub + ((ULONG_PTR)&HalpAPEntryData - (ULONG_PTR)&HalpAPEntry16));
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*apEntryData = (AP_ENTRY_DATA){
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.Jump32Offset = (ULONG)&HalpAPEntry32,
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.Jump32Segment = (ULONG)ProcessorState->ContextFrame.SegCs,
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.SelfPtr = (PVOID)apEntryData,
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.PageTableRoot = initialCr3,
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.ProcessorState = ProcessorState,
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.Gdtr = ProcessorState->SpecialRegisters.Gdtr,
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.Idtr = ProcessorState->SpecialRegisters.Idtr,
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};
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ApicStartApplicationProcessor(HalpStartedProcessorCount, HalpLowStubPhysicalAddress);
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HalpStartedProcessorCount++;
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return TRUE;
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}
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