Compiling ACPI v2.0 driver for Windows XP SP3 and Windows 2003 SP2 (x32/x64)

**Dietmar** · May 8, 2022

@Mov AX, 0xDEAD

GpioIo (

appears also in working DSDT.

But

Connection (

can be seen only in DSDT which gives DDB Bsod

Dietmar

**Mov AX, 0xDEAD** · May 8, 2022

31 minutes ago, Dietmar said:

@Mov AX, 0xDEAD

GpioIo (

appears also in working DSDT.

But

Connection (

can be seen only in DSDT which gives DDB Bsod

Dietmar

XP lacks Connection (0x02) opcode in ParseField()

Basicaly GPIO will never(ACPI v5.x standart) work in XP, we will have only interpreter bypass fix

Edited May 8, 2022 by Mov AX, 0xDEAD

**Dietmar** · May 8, 2022

@Mov AX, 0xDEAD

Yepp, I see the strange symbols in output from Windbg.

ba15058a: Device(GPO0)OSNotifyCreate: 8A4282C8 (GPO0) = 00000103

ba150592: {
ba150592: Name(_ADR,Zero)
ba150598: Name(_HID,"INT33FC")
ba1505a6: Name(_CID,"INT33FC")
ba1505b4: Name(_DDN,"ValleyView2 General Purpose Input/Output (GPIO) controller")
ba1505f5: Name(_UID,One)
ba1505fb: Method(_CRS,0x8)
ba150627: Method(_STA,0x0)
ba1506d1: Name(AVBL,Zero)
ba1506d7: Method(_REG,0x2)
ba1506ea: OperationRegion(GPOP,0x1,GPBS=0x500,0x50)
ba1506f7: Field(GPOP,0x1)
ba1506ff: {
ba150702: Offset(0x28),
ba150704: ,21,
ba150709: BTD3,1,
ba15070c: Offset(0x48),
ba15070e: ,30,
ba150713: SHD3,1
ba150713: }
ba150713: OperationRegion(GPO2,0x8,Zero,0xc)
ba15071d: Field(GPO2,0x1)
ba150725: {
ba15072a: &
,35,
ba15072f: Œ ,1,
ba150732: AccessAs(0x0,0x2),
ba150734: ,0,
ba150736: ,0,
ba150738: ,0,
ba15073d: ,0,
ba150743: #,15,
ba150748: \_SB,46AMLI_ERROR(c0000035): Object already exist
CreateNameSpaceObject: object already exist - \_SB

Do you have an idea, how to exclude or fake Connection (

in acpi.sys

Dietmar

**Dietmar** · May 8, 2022

I found this DSDT word "connection" in ACPIspec50.pdf from December 6, 2011 for the very first time.

Now it is clear, why xp, vista, win7 and (win8) dont like this Acpi5 word "connection" in DSDT.

Connection (GMOD), // Re-Use an existing connection (defined elsewhere)

Connection (
ConnectionResource // NameString | ResourceMacroTerm
)

Dietmar

Edited May 8, 2022 by Dietmar

**Mov AX, 0xDEAD** · May 8, 2022

Hi

Can someone share ACPI.SYS Windows 8.0. or Windows 8.1 x32 checked version ? (from checked installation ISO)

Edited May 8, 2022 by Mov AX, 0xDEAD

**daniel_k** · May 8, 2022

20 minutes ago, Mov AX, 0xDEAD said:

Hi

Can someone share ACPI.SYS Windows 8.0. or Windows 8.1 x32 checked version ? (from checked installation ISO)

I'm downloading the ISO, will send you a PM with the file in 5 minutes.

**Mov AX, 0xDEAD** · May 8, 2022

6 minutes ago, daniel_k said:

I'm downloading the ISO, will send you a PM with the file in 5 minutes.

Thanks, usual acpi.sys compiled with deep optimization, unknow mixed register/stack calling convection, hard to decompile

**Dietmar** · May 8, 2022

@daniel_k

I am faster^^

Here is acpi.sys Debug from Win8 bit32

Dietmar

https://ufile.io/zaglqzt1

**Dietmar** · May 8, 2022

I also found Debug version of Win8.1 .

Download finished in about 5 hours, brrr..

Dietmar

https://windowstan.com/win/windows-8-1-debug-checked-build

**daniel_k** · May 8, 2022

23 minutes ago, Dietmar said:

I also found Debug version of Win8.1 .

Download finished in about 5 hours, brrr..

Don't worry, just sent the file to @Mov AX, 0xDEAD

**Mov AX, 0xDEAD** · May 8, 2022

Quote

            Field (GPO2, ByteAcc, NoLock, Preserve)
            {
                Connection (
                    GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                        "\\_SB.GPO0", 0x00, ResourceConsumer, ,
                        )
                        {   // Pin list
                            0x005F
                        }
                ),
                SHS3,   1
            }

....

Device (SHUB)

Method (_PS3, 0, Serialized) // _PS3: Power State 3
                {
                    If ((^^^GPO0.AVBL == One))
                    {
                        If ((OSEL == 0x02))
                        {
                            ^^^GPO0.SHD3 = Zero
                        }
                        Else
                        {
                            ^^^GPO0.SHS3 = Zero
                        }
                    }
                }

Ignoring Connection broke access to SHS3 from other part of DSDT

to parse this new opcode, Win8 acpi.sys has new ParseFieldConnection((_ctxt *pctxt, XXX *pConnection))

to store connection config, _FieldDesc has new fields, last field has variable len:

Quote

struct _FieldDesc// Size=0x24
{
    unsigned long dwByteOffset;// Offset=0x0 Size=0x4
    unsigned long dwStartBitPos;// Offset=0x4 Size=0x4
    unsigned long dwNumBits;// Offset=0x8 Size=0x4
    unsigned long dwFieldFlags;// Offset=0xc Size=0x4
    unsigned char bAttribLength;// Offset=0x10 Size=0x1
    unsigned char __align0[3];// Offset=0x11 Size=0x3
    enum _CONNECTIONTYPE ConnectionType;// Offset=0x14 Size=0x4
    unsigned long dwConnectionFirstBitPos;// Offset=0x18 Size=0x4
    unsigned long dwConnectionLength;// Offset=0x1c Size=0x4
    unsigned char abConnectionData[YYY];// Offset=0x20 Size=0x1
    ....
};

I think these new fileds used in some field functions read/write/access to connection alias SHS3

**Dietmar** · May 8, 2022

May be this is interesting about the use of connection() in acpi5

Dietmar

https://uefi.org/specs/ACPI/6.4/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#gpio-signaled-acpi-events

**Mov AX, 0xDEAD** · May 8, 2022

Easy-Peasy way: skip GpioIo definition and assume SHS3 as memory field

Quote

OperationRegion (GPO2, GeneralPurposeIo, Zero, 0x0C)

Field (GPO2, ByteAcc, NoLock, Preserve)
            {
                Connection (
                    GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                        "\\_SB.GPO0", 0x00, ResourceConsumer, ,
                        )
                        {   // Pin list
                            0x005F
                        }
                ),
                SHS3,   1
            }

To:

Quote

OperationRegion (GPO2, GeneralPurposeIo, Zero, 0x0C)

Field (GPO2, ByteAcc, NoLock, Preserve)
            {
                SHS3,   1
            }

I know this is wrong, OperationRegion can be NULL or dummy, but we don't have any GPIO support in acpi.sys anyway

GeneralPurposeIo = 0x08, missed in XP acpi.sys

Edited May 8, 2022 by Mov AX, 0xDEAD

**Dietmar** · May 8, 2022

@Mov AX, 0xDEAD

Yepp, this is the way, that I modd my DSDT for the Flex 10.

This means editing of DSDT.

How can acpi.sys been told to ignore the connection () ?

By the way, how is sense for such a acpi5 word connection () in DSDT,

when acpi.sys does not work at all with the GPIO pins

Dietmar

**Mov AX, 0xDEAD** · May 8, 2022

22 minutes ago, Dietmar said:

@Mov AX, 0xDEAD

How can acpi.sys been told to ignore the connection () ?

@Dietmar

Same way as double devce definition was fixed, jump opcode pointer to next object

Just wait fix in few days

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Compiling ACPI v2.0 driver for Windows XP SP3 and Windows 2003 SP2 (x32/x64)

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