Hi Ahmad,
You will have to decide where to map it in the system memory map, and make sure
that range is not occupied. For example:
self.dram_ctrl = SimpleDDR3(range = AddrRange(‘512MB’))
self.pcm_ctrl = SimplePCM(range = AddrRange(start = ‘512MB', size = ‘512MB’))
self.mem_ranges = [self.dram_ctrl.range, self.pcm_ctrl.range]
self.membus.master = self.dram_ctrl.port
self.membus_master = self.pcm_ctrl.port
If you want multi-channel controllers like gets even more complicated. In that
case I’d suggest to use the MemConfig convenience functions.
Good luck with the changes.
Andreas
From: Ahmad Hassan <[email protected]<mailto:[email protected]>>
Reply-To: gem5 users mailing list
<[email protected]<mailto:[email protected]>>
Date: Monday, 28 October 2013 18:14
To: gem5 users mailing list <[email protected]<mailto:[email protected]>>
Subject: Re: [gem5-users] Running two SimpleDram instances simulataniously
Hi Andreas,
I am attaching two memory controller to the system as per your advice
system.ddr3_ctl and system.pcm_ctl. I found the following details inside
FSConfig.py
//makeX86System method
self.physmem = SimpleDDR3(range = AddrRange('1GB'))
self.mem_ranges = [self.physmem.range]
//connectX86ClassicSystem method
x86_sys.membus = MemBus()
x86_sys.physmem.port = x86_sys.membus.master
x86_sys.bridge.slave = x86_sys.membus.master
x86_sys.apicbridge.master = x86_sys.membus.slave
x86_sys.system_port = x86_sys.membus.slave
I am new to Gem5 memory model. Please can you give me hints how to change above
initialization to two memory controllers and attach them to the bus.
Thanks.
Best Regards, Ahmad
On 24 October 2013 19:28, Andreas Hansson
<[email protected]<mailto:[email protected]>> wrote:
Hi Ahmad,
You can instantiate as many controller as you want, all you have to do is edit
the python files. You can either try and add it as an option to fs.py or
similar, or manually create a system in a separate .py file.
You can simply do system.ddr3_ctrl = SimpleDDR3() and system.pcm_ctrl =
SimplePCM() (you have to create the latter class). You pass the address range
as a parameter to each controller. When you connect them to the bus they will
automatically be updating the address map in the bus.
Good luck.
As a final note, please stick to the mailing list :-)
Andreas
From: Ahmad Hassan <[email protected]<mailto:[email protected]>>
Date: Wednesday, 23 October 2013 20:29
To: Andreas Hansson <[email protected]<mailto:[email protected]>>
Subject: Re: Running two SimpleDram instances simulataniously
Or more simply, how would it be possible to use both "SimpleLPDDR2_S4" and
"SimpleDDR3" simultaneously. I will redirect some virtual addresses to
SimpleLPDDR2_S4 and some to SimpleDDR3.
Thanks.
kind Regards, Ahmad
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