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