You nede to be careful about the ranges not overlapping. In this
configuration you need to share the 256MB of memory space between memory
and ram disk. Each should just be 128MB, but be careful of starting at 0
and +128MB vs a range that is 0,128MB. Why a ram disk and not flash or
something else?
Ali
On 06.03.2012 11:00, Samuel Hitz wrote:
> I
tried that, but then I get
>
> fatal: system.membus has two ports with
same range:
> system.physmem-port0
> system.ramdisk-port0
>
(connected both ports to membus.master)
> How can I fix that?
>
> On
Tue, Mar 6, 2012 at 4:45 PM, Ali Saidi <sa...@umich.edu [11]> wrote:
>
>> You can connect it to the membus. I would suggest you start with
hacking on the config scripts that come with gem5 and make your change
in configs/common/FSConfig.py instead of starting from nothing, at least
to get started.
>>
>> Thanks,
>>
>> Ali
>>
>> On 06.03.2012 06:16,
Samuel Hitz wrote:
>>
>>> Hi Ali,
>>> I've problems setting up the
system with a ramdisk. How should I connect the ramdisk to the rest of
the memory system? And I'm also not sure if I instantiate the
PhysicalMemory correctly together with the ramdisk.
>>> Here is my
system script if you want to take a look at it:
>>> Link [7]
>>> Best,
>>> Samuel
>>>
>>> On Thu, Mar 1, 2012 at 4:43 PM, Ali Saidi
<sa...@umich.edu [8]> wrote:
>>>
>>>> Hi Samuel,
>>>>
>>>> We do
setup atags, but not the initrd and ramdisk although in theory those
could be added.
>>>>
>>>> See src/arch/arm/linux/atags.hh and
src/arch/arm/linux/system.cc
>>>>
>>>> Ali
>>>>
>>>> On 01.03.2012
04:33, Samuel Hitz wrote:
>>>>
>>>>> Just a small follow up question.
Does the bootloader set the ATAG_INITRD2 and ATAG_RAMDISK tags
accordingly? Does it set the ATAG_* tags at all?
>>>>> Best,
>>>>>
Samuel
>>>>>
>>>>> On Wed, Feb 29, 2012 at 6:27 PM, Samuel Hitz
<samuel.h...@gmail.com [6]> wrote:
>>>>>
>>>>>> Hi Ali,
>>>>>> Thanks
for the clarification, this should get me started.
>>>>>> Best,
>>>>>>
Samuel
>>>>>>
>>>>>> On Wed, Feb 29, 2012 at 6:19 PM, Ali Saidi
<sa...@umich.edu [5]> wrote:
>>>>>>
>>>>>>> Hi Samuel,
>>>>>>>
>>>>>>> self in this case is the system.
>>>>>>>
>>>>>>>
./build/ARM/m5.opt --list-sim-objects should provide you a list of all
objects and parameters, however now that I run it there is a bug and
it's not printing everything. Until we get it fixed looking at the *py
files in src is your best bet.
>>>>>>>
>>>>>>> Ali
>>>>>>>
>>>>>>>
On 29.02.2012 10:49, Samuel Hitz wrote:
>>>>>>>
>>>>>>>> Hi Ali,
>>>>>>>> Thanks for your help.
>>>>>>>> Just to make clear, this would
be in my config python script right? And to which class 'self' refers to
in this example? Also is there some centralized documentation, or do I
have to search through the implementation files to get all the possible
settings I can make in the config script?
>>>>>>>> Best,
>>>>>>>>
Samuel
>>>>>>>>
>>>>>>>> On Wed, Feb 29, 2012 at 5:35 PM, Ali Saidi
<sa...@umich.edu [4]> wrote:
>>>>>>>>
>>>>>>>>> Hi Samuel,
>>>>>>>>>
>>>>>>>>> You can include a ram disk by taking part of the physical
memory and placing a ram disk there. For example for a ram disk in linux
(provided you had a ram disk driver is the kernel), you could add
something like:
>>>>>>>>>
>>>>>>>>> self.ramdisk =
PhysicalMemory(range = AddrRange(Addr('128MB'), size = '128MB'),
file='/path/to/ramdisk.img')
>>>>>>>>>
>>>>>>>>> and assuming you only
specified 128MB of DRAM the upper 128MB would be used for ramdisk.
>>>>>>>>>
>>>>>>>>> The easiest thing to do is an ELF file.
>>>>>>>>>
>>>>>>>>> Ali
>>>>>>>>>
>>>>>>>>> On 29.02.2012 10:15, Samuel Hitz
wrote:
>>>>>>>>>
>>>>>>>>>> Hi there,
>>>>>>>>>> I'm trying to port
Barrelfish [1] to ARMv7 modeled by gem5. As I'm new to using gem5, I
have some simple questions to start with.
>>>>>>>>>> 1. What's the
best/easiest way to include a ramdisk in gem5? Shall I pack it in the
same file as the kernel or can I somehow specify, where the ramdisk
should be loaded into memory in the script? As far as I see it, with
gem5 one doesn't need/have a bootloader where such things could be
specified.
>>>>>>>>>> 2. What format should the kernel object file
have? Does it work with an ELF file or should I use a raw image?
>>>>>>>>>> Help is much appreciated.
>>>>>>>>>> Best,
>>>>>>>>>>
Samuel
>>>>>>>>>
>>>>>>>>>
_______________________________________________
>>>>>>>>> gem5-users
mailing list
>>>>>>>>> gem5-users@gem5.org [2]
>>>>>>>>>
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users [3]
>>
>>
_______________________________________________
>> gem5-users mailing
list
>> gem5-users@gem5.org [9]
>>
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users [10]
Links:
------
[1] http://www.barrelfish.org/
[2]
mailto:gem5-users@gem5.org
[3]
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[4]
mailto:sa...@umich.edu
[5] mailto:sa...@umich.edu
[6]
mailto:samuel.h...@gmail.com
[7]
http://pastie.org/private/5esxjfph9lny6t0u99niua
[8]
mailto:sa...@umich.edu
[9] mailto:gem5-users@gem5.org
[10]
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[11]
mailto:sa...@umich.edu
_______________________________________________
gem5-users mailing list
gem5-users@gem5.org
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
