spinup.c File Reference

#include <hal.h>
#include <smp.h>
#include <debug.h>

Include dependency graph for spinup.c:

Go to the source code of this file.

Classes
struct	_AP_ENTRY_DATA

Macros
#define	NDEBUG
#define	Add2Ptr(P, I)   ((PVOID)((PUCHAR)(P) + (I)))
#define	PtrOffset(B, O)   ((ULONG)((ULONG_PTR)(O) - (ULONG_PTR)(B)))

Typedefs
typedef struct _AP_ENTRY_DATA	AP_ENTRY_DATA
typedef struct _AP_ENTRY_DATA *	PAP_ENTRY_DATA

Functions
static ULONG	HalpSetupTemporaryMappings (_In_ PKPROCESSOR_STATE ProcessorState)
BOOLEAN NTAPI	HalStartNextProcessor (_In_ PLOADER_PARAMETER_BLOCK LoaderBlock, _In_ PKPROCESSOR_STATE ProcessorState)

Variables
PPROCESSOR_IDENTITY	HalpProcessorIdentity
PHYSICAL_ADDRESS	HalpLowStubPhysicalAddress
PVOID	HalpLowStub
PVOID	HalpAPEntry16
PVOID	HalpAPEntryData
PVOID	HalpAPEntry32
PVOID	HalpAPEntry16End
HALP_APIC_INFO_TABLE	HalpApicInfoTable
ULONG	HalpStartedProcessorCount = 1

Macro Definition Documentation

Add2Ptr

#define Add2Ptr	(		P,
			I
	)		((PVOID)((PUCHAR)(P) + (I)))

Definition at line 33 of file spinup.c.

NDEBUG

#define NDEBUG

Definition at line 14 of file spinup.c.

PtrOffset

#define PtrOffset	(		B,
			O
	)		((ULONG)((ULONG_PTR)(O) - (ULONG_PTR)(B)))

Definition at line 36 of file spinup.c.

Typedef Documentation

AP_ENTRY_DATA

typedef struct _AP_ENTRY_DATA AP_ENTRY_DATA

PAP_ENTRY_DATA

typedef struct _AP_ENTRY_DATA * PAP_ENTRY_DATA

Function Documentation

HalpSetupTemporaryMappings()

static ULONG HalpSetupTemporaryMappings ( _In_ PKPROCESSOR_STATE  ProcessorState )

static

Definition at line 54 of file spinup.c.

{
    PMMPDE RootPageTable = Add2Ptr(HalpLowStub, PAGE_SIZE);
    PMMPDE LowMapPde = Add2Ptr(HalpLowStub, 2 * PAGE_SIZE);
    PMMPTE LowStubPte = MiAddressToPte(HalpLowStub);
    PHYSICAL_ADDRESS PhysicalAddress;
    ULONG StartPti;
 
    /* Copy current mappings */
    RtlCopyMemory(RootPageTable, MiAddressToPde(NULL), PAGE_SIZE);
 
    /* Set up low PDE */
    PhysicalAddress = MmGetPhysicalAddress(LowMapPde);
    RootPageTable[0].u.Hard.PageFrameNumber = PhysicalAddress.QuadPart >> PAGE_SHIFT;
    RootPageTable[0].u.Hard.Valid = 1;
    RootPageTable[0].u.Hard.Write = 1;
 
    /* Copy low stub PTEs */
    StartPti = MiAddressToPteOffset(HalpLowStubPhysicalAddress.QuadPart);
    ASSERT(StartPti + HALP_LOW_STUB_SIZE_IN_PAGES < 1024);
    for (ULONG i = 0; i < HALP_LOW_STUB_SIZE_IN_PAGES; i++)
    {
        LowMapPde[StartPti + i] = LowStubPte[i];
    }
 
    PhysicalAddress = MmGetPhysicalAddress(RootPageTable);
    ASSERT(PhysicalAddress.QuadPart < 0x100000000);
    return (ULONG)PhysicalAddress.QuadPart;
}

Referenced by HalStartNextProcessor().

HalStartNextProcessor()

BOOLEAN NTAPI HalStartNextProcessor	(	_In_ PLOADER_PARAMETER_BLOCK	LoaderBlock,
		_In_ PKPROCESSOR_STATE	ProcessorState
	)

Definition at line 87 of file spinup.c.

{
    if (HalpStartedProcessorCount == HalpApicInfoTable.ProcessorCount)
        return FALSE;
 
    // Initalize the temporary page table
    // TODO: clean it up after an AP boots successfully
    ULONG initialCr3 = HalpSetupTemporaryMappings(ProcessorState);
    if (!initialCr3)
        return FALSE;
 
    // Put the bootstrap code into low memory
    RtlCopyMemory(HalpLowStub, &HalpAPEntry16, (ULONG_PTR)&HalpAPEntry16End - (ULONG_PTR)&HalpAPEntry16);
 
    // Get a pointer to apEntryData
    PAP_ENTRY_DATA apEntryData = (PVOID)((ULONG_PTR)HalpLowStub + ((ULONG_PTR)&HalpAPEntryData - (ULONG_PTR)&HalpAPEntry16));
 
    *apEntryData = (AP_ENTRY_DATA){
        .Jump32Offset = (ULONG)&HalpAPEntry32,
        .Jump32Segment = (ULONG)ProcessorState->ContextFrame.SegCs,
        .SelfPtr = (PVOID)apEntryData,
        .PageTableRoot = initialCr3,
        .ProcessorState = ProcessorState,
        .Gdtr = ProcessorState->SpecialRegisters.Gdtr,
        .Idtr = ProcessorState->SpecialRegisters.Idtr,
    };
 
    ApicStartApplicationProcessor(HalpStartedProcessorCount, HalpLowStubPhysicalAddress);
 
    HalpStartedProcessorCount++;
 
    return TRUE;
}

Variable Documentation

HalpAPEntry16

PVOID HalpAPEntry16

extern

Referenced by HalStartNextProcessor().

HalpAPEntry16End

PVOID HalpAPEntry16End

extern

Referenced by HalStartNextProcessor().

HalpAPEntry32

PVOID HalpAPEntry32

extern

Referenced by HalStartNextProcessor().

HalpAPEntryData

PVOID HalpAPEntryData

extern

Referenced by HalStartNextProcessor().

HalpApicInfoTable

HALP_APIC_INFO_TABLE HalpApicInfoTable

extern

Definition at line 22 of file madt.c.

Referenced by HalpParseApicTables(), HalpPrintApicTables(), and HalStartNextProcessor().

HalpLowStub

PVOID HalpLowStub

extern

Definition at line 32 of file halacpi.c.

Referenced by HalpSetupAcpiPhase0(), HalpSetupTemporaryMappings(), and HalStartNextProcessor().

HalpLowStubPhysicalAddress

PHYSICAL_ADDRESS HalpLowStubPhysicalAddress

extern

Definition at line 29 of file halacpi.c.

Referenced by HalpSetupAcpiPhase0(), HalpSetupTemporaryMappings(), and HalStartNextProcessor().

HalpProcessorIdentity

PPROCESSOR_IDENTITY HalpProcessorIdentity

extern

Definition at line 21 of file madt.c.

HalpStartedProcessorCount

ULONG HalpStartedProcessorCount = 1

Definition at line 30 of file spinup.c.

Referenced by HalStartNextProcessor().