Hello,
The `DMADevice` is also abstract. See
https://gem5.googlesource.com/public/gem5/+/refs/heads/stable/src/dev/Device.py#82
Maybe what you're trying to do would be best accomplished by adding a new
SimObject which inherits from DMADevice.
Cheers,
Jason
On Wed, Apr 27, 2022 at 9:45 AM <rshank...@austin.rr.com> wrote:
> Jason,
>
>
>
> Thanks for again for the fix related to PioDevice & your guidance to use
> DmaDevice
>
>
>
> DmaDevice also provides same “No Constructor TypeError” which checking the
> dma_device.cc – the constructor is empty
>
>
>
>
>
>
>
> Traceback (most recent call last):
> File "<string>", line 1, in <module>
> File "build/X86/python/m5/main.py", line 455, in main
> exec (filecode, scope)
> File "/home/raghu/gem5/configs/learning_gem5/part1/test.py", line 187,
> in <module>
> m5.instantiate()
> File "build/X86/python/m5/simulate.py", line 116, in instantiate
> for obj in root.descendants(): obj.createCCObject()
> File "build/X86/python/m5/SimObject.py", line 1790, in createCCObject
> self.getCCParams()
> File "build/X86/python/m5/SimObject.py", line 1720, in getCCParams
> cc_params = cc_params_struct()
>
> TypeError: _m5.param_DmaDevice.DmaDeviceParams: No constructor defined!
>
>
>
> *Dma_device.cc*
>
> DmaDevice::DmaDevice(const Params &p)
>
> : PioDevice(p), dmaPort(this, sys, p.sid, p.ssid)
>
> { }
>
>
>
> *From:* Jason Lowe-Power via gem5-users <gem5-users@gem5.org>
> *Sent:* Friday, April 22, 2022 11:16 AM
> *To:* gem5 users mailing list <gem5-users@gem5.org>
> *Cc:* rshank...@austin.rr.com; Jason Lowe-Power <ja...@lowepower.com>
> *Subject:* [gem5-users] Re: Adding PioDevice leads to TypeError: No
> constructor defined
>
>
>
> I just pushed a change that will make this error message better.
>
>
>
> "fatal: Cannot instantiate an abstract SimObject (system.dev)" is what
> the error now says :).
>
>
>
> See https://gem5-review.googlesource.com/c/public/gem5/+/59049
>
>
>
> Cheers,
>
> Jason
>
>
>
> On Fri, Apr 22, 2022 at 8:57 AM Jason Lowe-Power <ja...@lowepower.com>
> wrote:
>
> Hello,
>
>
>
> I believe the problem is that gem5 tries to do too much automatically for
> you! gem5 automatically creates a lot of the constructor/destructor codes.
> Given all of this hidden/automatic code generation, it's difficult to know
> exactly what's going wrong (for both you and for us).
>
>
>
> That said, I think the problem is that `PioDevice` is an abstract
> SimObject, not a concrete SimObject. This may work if you instead use the
> `DmaDevice`.
>
>
>
> Cheers,
>
> Jason
>
>
>
> On Thu, Apr 21, 2022 at 1:58 PM Raghu Shankar via gem5-users <
> gem5-users@gem5.org> wrote:
>
> By adding a PioDevice() to my version of two_level.py configuration
> script, I get this error
>
>
>
> TypeError: _m5.param_PioDevice.PioDeviceParams: No constructor defined!
>
> And checking io_device.cc the constructor looks empty
>
>
>
> Any help please? Thanks
>
>
>
> *Details:*
>
>
>
> Traceback (most recent call last):
> File "<string>", line 1, in <module>
> File "build/X86/python/m5/main.py", line 455, in main
> exec(filecode, scope)
>
>
> File "/home/raghu/gem5/configs/learning_gem5/part1/two_level.py", line
> 187, in <module>
> m5.instantiate()
> File "build/X86/python/m5/simulate.py", line 116, in instantiate
>
> File "build/X86/python/m5/SimObject.py", line 1790, in createCCObject
> self.getCCParams()
> File "build/X86/python/m5/SimObject.py", line 1720, in getCCParams
> cc_params = cc_params_struct()
>
> TypeError: _m5.param_PioDevice.PioDeviceParams: No constructor defined!
>
>
>
>
>
> *Io_device.cc*
>
> include "dev/io_device.hh"
>
> #include "base/trace.hh"
> #include "debug/AddrRanges.hh"
> #include "sim/system.hh"
>
> namespace gem5
> {
>
> PioDevice::PioDevice(const Params &p)
> : ClockedObject(p), sys(p.system), pioPort(this)
> {}
>
> PioDevice::~PioDevice()
> {
> }
>
>
>
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