Rock N Roll bass tab by Led Zeppelin

I've played this song and it's three notes the entire time A D and E or the frets
go A= 5th fret lowest or 4th string, D= 5th fret 3rd string E= 7th fret 3rd string.

/=new measure everything written above corrosponding lyrics or just in mesures
4 1/2 measure drum solo

A/A/D/A/E/A


A
Been a long time since i rocked an rolled.
A
been a long time since i did the stroll...
D
Oh let me get back let me get back let me get back
D

baby where i come from  /A/
E
Been a long time been a long time been a long
(silence)
lonely lonely lonely lonely lonely time
/A/
repeat
(guitar solo is same as intro)