/*

     File: AppleSamplePCIShared.h

 Abstract: Shared header that defines the data structures we can use to communicate between our kext and 

    our userland client

  Version: 1.1

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// Structures in this file are aligned naturally by ordering any 64 bit quantities first.

// #pragma pack could also be used to force alignment

enum {

    kSampleMethod1 = 0,

    kSampleMethod2 = 1,

    kSampleMethod3 = 2,

    kSampleNumMethods

};

// To avoid invisible compiler padding, align fields on 64-bit boundaries when possible

// and make the whole structure's size a multiple of 64 bits.

typedef struct SampleStructForMethod2 {

    uint64_t        data_pointer; // Use C99 types to ensure desired size without unexpected truncation of 64-bit quantities.

    uint64_t        data_length;

    uint32_t        parameter1;

    uint32_t        __pad;

} SampleStructForMethod2;

typedef struct SampleResultsForMethod2 {

    uint64_t        results1;

} SampleResultsForMethod2;

#define SamplePCIClassName  com_example_apple_samplecode_driver_SamplePCI

#define kSamplePCIClassName "com_example_apple_samplecode_driver_SamplePCI"

// types for IOServiceOpen()

enum {

    kSamplePCIConnectType = 23

};

// types for IOConnectMapMemory()

enum {

    kSamplePCIMemoryType1 = 100,

    kSamplePCIMemoryType2 = 101,

};

// memory structure to be shared between the kernel and userland.

typedef struct SampleSharedMemory {

    uint32_t    field1;

    uint32_t    field2;

    uint32_t    field3;

    char        string[100];

} SampleSharedMemory;

#define kMyDisplayBrightnessKey "brightness"

#define kMyDisplayParametersKey "DisplayParameters"

#define kMyDisplayValueKey      "value"

#define kMyPropertyKey          "MyProperty"