WRITE_REGISTER_BUFFER_ULONG64 function (miniport.h)

Article
02/22/2024

Warning

UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]

The WRITE_REGISTER_BUFFER_ULONG64 function writes a number of ULONG64 values from a buffer to the specified register.

Syntax

void WRITE_REGISTER_BUFFER_ULONG64(
  [in] volatile ULONG64 *Register,
  [in] PULONG64         Buffer,
  [in] ULONG            Count
);

Parameters

[in] Register

A pointer to the register, which must be a mapped range in memory space.

[in] Buffer

A pointer to a buffer into which an array of ULONG64 values is to be written.

[in] Count

Specifies the number of ULONG64 values to write to the register.

Return value

None

Remarks

The size of the buffer must be large enough to contain at least the specified number of bytes.

For more information, see Reading and Writing to Device Registers in UMDF 1.x Drivers.

Requirements

Requirement	Value
Minimum supported client	64-bit Windows
End of support	Unavailable in UMDF 2.0 and later.
Target Platform	Desktop
Minimum UMDF version	1.11
Header	miniport.h (include Wdm.h, Miniport.h, Wudfwdm.h)
Library	NtosKrnl.exe

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