How to do "DONT_TOUCH" in MAGMA

[au_sun]

i am working on P&R(placement and routing) in Magma,
i have a requirment of keeping a sub-block under the top module as dont_touch
how to do "dont_touch" in magma ?

i request edaboard members for ur kind help.....

 

[aravind]

u wanna place all blocks in hier-.
in partitionally phase u can do it.
i saw regarding that in Demosondemand once.

 

[dynamicdude]

What about using the Force keep command? Did you use it?

 

[au_sun]

aravind, i want to keep only the netlist as such and no separate partition required in the floorplan,

dynamicdude, i tried using "force keep -content" command, but the problem is , in the layout, the pins belonging to the "kept" netlist are not connected, they are open in the layout,

so is there any other way to do "dont_touch" option in Magam

 

[leeenghan]

Hi,

Hope this exmaple help. It force keep all the cell in instance core/clk.

set keepList [ data find $m core/clk/* -type cell ]
foreach keepItem $keepList {
force keep $keepItem
}


Regards,
Eng Han

 

[wadaye]

Hi au_sun,

Just hide them.

Hiding a model prevents that single model from being used.
Hiding an entity prevents all the models within the entity from being used.

The command is:

force hide entity | model

Example:

force hide $l/AND5

force hide $l/AND5/AND5X4

 

[hiben]

Hi , I think the method of leeenghan is correct

 

[xworld2008]

hi au_sun,

your meaning is just keep hierarchy for one block in netlist? you can using

force maintain