// acpitabl.h

typedef struct _PCC_REDUCED_2_SUBSPACE {
  PCC_SUBSPACE_HEADER Header;
  ULONG               PlatformInterruptGsiv;
  union {
    struct {
      UCHAR PlatformInterruptPolarity : 1;
      UCHAR PlatformInterruptMode : 1;
      UCHAR Reserved1 : 6;
    };
    UCHAR PlatformInterruptFlags;
  };
  UCHAR               Reserved2;
  PHYSICAL_ADDRESS    BaseAddress;
  ULONGLONG           Length;
  GEN_ADDR            DoorbellRegister;
  ULONGLONG           DoorbellPreserve;
  ULONGLONG           DoorbellWrite;
  ULONG               NominalLatency;
  ULONG               MaximumPeriodicAccessRate;
  USHORT              MinimumRequestTurnaroundTime;
  GEN_ADDR            PlatformInterruptAckRegister;
  ULONGLONG           PlatformInterruptAckPreserve;
  ULONGLONG           PlatformInterruptAckWrite;
} PCC_REDUCED_2_SUBSPACE, *PPCC_REDUCED_2_SUBSPACE;
View the official Windows Driver Kit DDI reference

NtDoc

No description available.

Edit description on GitHub

Windows Driver Kit DDI reference (ns-acpitabl-pcc_reduced_2_subspace)

Description

The PCC_REDUCED_2_SUBSPACE structure contains information about the ACPI Platform Communication Channel (PCC) HW-reduced Type 2 subspace.

Members

`Header`

The PCC_SUBSPACE_HEADER header.

`PlatformInterruptGsiv`

The PCC platform global system interrupt vector (GSIV).

`PlatformInterruptPolarity`

The PCC platform interrupt polarity value (one of PCC_PLATFORM_INTERRUPT_POLARITY_XXX).

`PlatformInterruptMode`

The PCC platform interrupt mode (must be PCC_PLATFORM_INTERRUPT_MODE_EDGE_TRIGGERED).

`Reserved1`

Reserved for future use.

`PlatformInterruptFlags`

The PCC platform interrupt flags.

`Reserved2`

Reserved for future use.

`BaseAddress`

The PHYSICAL_ADDRESS base address.

`Length`

The length value.

`DoorbellRegister`

The GEN_ADDR doorbell register.

`DoorbellPreserve`

The doorbell preserve mask.

`DoorbellWrite`

The doorbell write mask.

`NominalLatency`

The nominal latency value.

`MaximumPeriodicAccessRate`

The maximum periodic access rate value.

`MinimumRequestTurnaroundTime`

The minimum request turnaround time value.

`PlatformInterruptAckRegister`

The GEN_ADDR platform interrupt ack register.

`PlatformInterruptAckPreserve`

The platform interrupt ack preserve mask.

`PlatformInterruptAckWrite`

The platform interrupt ack write mask.

PCC_REDUCED_2_SUBSPACE - NtDoc