dev_aix_ppc64.go

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build aix && ppc64
     6  
     7  // Functions to access/create device major and minor numbers matching the
     8  // encoding used AIX.
     9  
    10  package unix
    11  
    12  // Major returns the major component of a Linux device number.
    13  func Major(dev uint64) uint32 {
    14  	return uint32((dev & 0x3fffffff00000000) >> 32)
    15  }
    16  
    17  // Minor returns the minor component of a Linux device number.
    18  func Minor(dev uint64) uint32 {
    19  	return uint32((dev & 0x00000000ffffffff) >> 0)
    20  }
    21  
    22  // Mkdev returns a Linux device number generated from the given major and minor
    23  // components.
    24  func Mkdev(major, minor uint32) uint64 {
    25  	var DEVNO64 uint64
    26  	DEVNO64 = 0x8000000000000000
    27  	return ((uint64(major) << 32) | (uint64(minor) & 0x00000000FFFFFFFF) | DEVNO64)
    28  }
    29
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