mirror of
https://github.com/reactos/reactos.git
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122 lines
3.7 KiB
C
122 lines
3.7 KiB
C
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/*
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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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