how to call same form by different performs as below?

Hi,

i want to use a Form get_data by calling Perform get_data twice with two different internal tables as below

perform get_data tables it_upload

using tab_name

changing it_material.

it_material has structure as below

types : begin of ty_material,

serno type sy-tabix,

matnr1 type mara-matnr,

matnr2 type mara-matnr,

matnr3 type mara-matnr,

end of ty_material.

perform get_data tables it_upload

using tab_name

changing it_location.

it_location has structure as below

types : begin of ty_location,

site1 type mard-werks,

site2 type mard-werks,

sloc1 type mard-lgort,

sloc2 type mard-lgort,

end of ty_location.

now how to declare Form Get_data

can anyone suggest me how to declare Form Get_data