windows驱动程序中获取物理内存大小

BOOLEAN  ProcMemoryDevice(void* p)
{
	PMemoryDevice PMD= (PMemoryDevice)p;
	DbgPrintEx(77, 0, "Size==%dMB %dGB\n", PMD->Size, PMD->Size/1024);
	
}

BOOLEAN  DumpSMBIOSStruct(PVOID Addr, ULONG Len)
{
	PUCHAR p = (PUCHAR)(Addr);
	const PUCHAR lastAddress = p + Len;
	PSMBIOSHEADER pHeader;
	BOOLEAN result = FALSE;	
	while (1)
	{
		pHeader = (PSMBIOSHEADER)p;
		if ((pHeader->Type == 127) && (pHeader->Length == 4))
		{
			break;
		}	
		if (pHeader->Type == 17)
		{
			ProcMemoryDevice(pHeader);
			result = TRUE;
			break;
		}
		PUCHAR nt = p + pHeader->Length; // point to struct end
		while (0 != (*nt | *(nt + 1))) nt++; // skip string area
		nt += 2;
		if (nt >= lastAddress)
			break;
		p = nt;
	}
	return result;
}



unsigned char GetSystemInfo()
{
	DbgBreakPoint();
	NTSTATUS Status = STATUS_SUCCESS;
	Status=AuxKlibInitialize();//初始化
	if (!NT_SUCCESS(Status))
	{
		return FALSE;
	}
	ULONG ReturnLength = 0;
	Status=AuxKlibGetSystemFirmwareTable('RSMB',0,NULL,0, &ReturnLength);
	if (Status != STATUS_BUFFER_TOO_SMALL)
	{
		return FALSE;
	}

		VOID* Mem=ExAllocatePool(PagedPool, ReturnLength);
		if (Mem == NULL)
		{
			return FALSE;
		}

		Status = AuxKlibGetSystemFirmwareTable('RSMB', 0, Mem, ReturnLength,&ReturnLength);
		if (!NT_SUCCESS(Status))
		{
			ExFreePool(Mem);
			return FALSE;
		}
		p_RawSMBIOSData Psmbios = Mem;
		if (DumpSMBIOSStruct(&(Psmbios->SMBIOSTableData), Psmbios->Length))
		{
			return FALSE;
		}
		else
		{
			return TRUE;
		}
}

  
来源DumpSMBIOS/DumpSMBIOS/DumpSMBIOS.cpp at main · 10010100111000/DumpSMBIOS

不太懂这个结构,或许这样比较方便一点物理内存范围 （MmPhysicalMemoryBlock） |WLSGJD