[U-Boot] [ppc] qemu-ppce500 howto

[U-Boot] [ppc] qemu-ppce500 howto

[Alon Bar-Lev]

Hi,

Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and
no luck, I get live signal.

I am using latest u-boot master and qemu master.

Command:
$ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin

Tried to load u-boot as well, same.

Are there any patches pending or any tweak that should be done?

Is there any way to provide more information?

I tried:
$ ./qemu-system-ppc -M ppce500 -nographic -M ppce500 -m 256 -s -S
$ gdb
(gdb) target remote :1234
Remote debugging using :1234
warning: Can not parse XML target description; XML support was disabled at
compile time
0x00000000 in ?? ()
(gdb) load u-boot
Loading section .bootpg, size 0x2f4 lma 0xf00000
Load failed

How can I inject the firmware using gdb?

Thanks!
Alon Bar-Lev

[U-Boot] [ppc] qemu-ppce500 howto

[Alexander Graf]

On 22.05.14 09:52, Alon Bar-Lev wrote:
> Hi,
>
> Trying to run the qemu-ppce500 within qemu. I am using -bios 
> u-boot.bin and no luck, I get live signal.
>
> I am using latest u-boot master and qemu master.
>
> Command:
> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>
> Tried to load u-boot as well, same.

Yes, that command should work with the right patches :). Unfortunately 
they are not in master yet, but instead waiting in my queue:

   https://github.com/agraf/qemu

Please give things a try with the ppc-next branch in there. That should 
get things working for you.

If you also want to run this using KVM, please keep in mind that you 
need a few extra patches that are in my kvm-ppc-queue branch as well.


Alex

[U-Boot] [ppc] qemu-ppce500 howto

[Alon Bar-Lev]

On Thu, May 22, 2014 at 12:04 PM, Alexander Graf <agraf@suse.de> wrote:
>
>
> On 22.05.14 09:52, Alon Bar-Lev wrote:
>>
>> Hi,
>>
>> Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and no luck, I get live signal.
>>
>> I am using latest u-boot master and qemu master.
>>
>> Command:
>> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>>
>> Tried to load u-boot as well, same.
>
>
> Yes, that command should work with the right patches :). Unfortunately they are not in master yet, but instead waiting in my queue:
>
>   https://github.com/agraf/qemu
>
> Please give things a try with the ppc-next branch in there. That should get things working for you.
>

WORKING! thanks!

Is there any support for flush and/or mtd for this target (-drive
if=pflash, -mtdblock)?

> If you also want to run this using KVM, please keep in mind that you need a few extra patches that are in my kvm-ppc-queue branch as well.
>
>
> Alex
>

[U-Boot] [ppc] qemu-ppce500 howto

[Alexander Graf]

On 24.05.14 09:23, Alon Bar-Lev wrote:
> On Thu, May 22, 2014 at 12:04 PM, Alexander Graf <agraf@suse.de> wrote:
>>
>> On 22.05.14 09:52, Alon Bar-Lev wrote:
>>> Hi,
>>>
>>> Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and no luck, I get live signal.
>>>
>>> I am using latest u-boot master and qemu master.
>>>
>>> Command:
>>> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>>>
>>> Tried to load u-boot as well, same.
>>
>> Yes, that command should work with the right patches :). Unfortunately they are not in master yet, but instead waiting in my queue:
>>
>>    https://github.com/agraf/qemu
>>
>> Please give things a try with the ppc-next branch in there. That should get things working for you.
>>
> WORKING! thanks!
>
> Is there any support for flush and/or mtd for this target (-drive
> if=pflash, -mtdblock)?

I haven't implemented pflash yet, sorry. Do you need the flash device 
for configuration storage or as backing storage for your kernel?


Alex

[U-Boot] [ppc] qemu-ppce500 howto

[Alon Bar-Lev]

On Sun, May 25, 2014 at 1:08 PM, Alexander Graf <agraf@suse.de> wrote:
>
>
> On 24.05.14 09:23, Alon Bar-Lev wrote:
>>
>> On Thu, May 22, 2014 at 12:04 PM, Alexander Graf <agraf@suse.de> wrote:
>>>
>>>
>>> On 22.05.14 09:52, Alon Bar-Lev wrote:
>>>>
>>>> Hi,
>>>>
>>>> Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and no luck, I get live signal.
>>>>
>>>> I am using latest u-boot master and qemu master.
>>>>
>>>> Command:
>>>> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>>>>
>>>> Tried to load u-boot as well, same.
>>>
>>>
>>> Yes, that command should work with the right patches :). Unfortunately they are not in master yet, but instead waiting in my queue:
>>>
>>>    https://github.com/agraf/qemu
>>>
>>> Please give things a try with the ppc-next branch in there. That should get things working for you.
>>>
>> WORKING! thanks!
>>
>> Is there any support for flush and/or mtd for this target (-drive
>> if=pflash, -mtdblock)?
>
>
> I haven't implemented pflash yet, sorry. Do you need the flash device for configuration storage or as backing storage for your kernel?
>

Well, I wish both... :)

boot qemu as if it were a target....

1. put u-boot on pflash, and boot from it.
2. have backing storage for kernel (can be mtd).
3. have data partition (can be mtd).

we can skip (1) as -bios is good enough... but for (2), (3) I do not
see solution but have either mtd or other block device support... is
that possible?

>
> Alex
>

[U-Boot] [ppc] qemu-ppce500 howto

[Alexander Graf]

On 25.05.2014, at 13:10, Alon Bar-Lev <alon.barlev@gmail.com> wrote:

> On Sun, May 25, 2014 at 1:08 PM, Alexander Graf <agraf@suse.de> wrote:
>> 
>> 
>> On 24.05.14 09:23, Alon Bar-Lev wrote:
>>> 
>>> On Thu, May 22, 2014 at 12:04 PM, Alexander Graf <agraf@suse.de> wrote:
>>>> 
>>>> 
>>>> On 22.05.14 09:52, Alon Bar-Lev wrote:
>>>>> 
>>>>> Hi,
>>>>> 
>>>>> Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and no luck, I get live signal.
>>>>> 
>>>>> I am using latest u-boot master and qemu master.
>>>>> 
>>>>> Command:
>>>>> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>>>>> 
>>>>> Tried to load u-boot as well, same.
>>>> 
>>>> 
>>>> Yes, that command should work with the right patches :). Unfortunately they are not in master yet, but instead waiting in my queue:
>>>> 
>>>>   https://github.com/agraf/qemu
>>>> 
>>>> Please give things a try with the ppc-next branch in there. That should get things working for you.
>>>> 
>>> WORKING! thanks!
>>> 
>>> Is there any support for flush and/or mtd for this target (-drive
>>> if=pflash, -mtdblock)?
>> 
>> 
>> I haven't implemented pflash yet, sorry. Do you need the flash device for configuration storage or as backing storage for your kernel?
>> 
> 
> Well, I wish both... :)
> 
> boot qemu as if it were a target....
> 
> 1. put u-boot on pflash, and boot from it.
> 2. have backing storage for kernel (can be mtd).
> 3. have data partition (can be mtd).
> 
> we can skip (1) as -bios is good enough... but for (2), (3) I do not

For (2) you can use the -kernel option. It should make the payload's physical address available through an environment variable. If it's a uImage, it will get loaded automatically.
For (3) you can use all the emulated block storage options QEMU provides, such as virtio-pci or ahci.

> see solution but have either mtd or other block device support... is
> that possible?

It's definitely possible, yes :). I simply didn't implement any mtd device emulation so far in the QEMU machine model. But patches are definitely welcome!


Alex

[U-Boot] [ppc] qemu-ppce500 howto

[Alon Bar-Lev]

On Sun, May 25, 2014 at 2:16 PM, Alexander Graf <agraf@suse.de> wrote:
>
> On 25.05.2014, at 13:10, Alon Bar-Lev <alon.barlev@gmail.com> wrote:
>
>> On Sun, May 25, 2014 at 1:08 PM, Alexander Graf <agraf@suse.de> wrote:
>>>
>>>
>>> On 24.05.14 09:23, Alon Bar-Lev wrote:
>>>>
>>>> On Thu, May 22, 2014 at 12:04 PM, Alexander Graf <agraf@suse.de> wrote:
>>>>>
>>>>>
>>>>> On 22.05.14 09:52, Alon Bar-Lev wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and no luck, I get live signal.
>>>>>>
>>>>>> I am using latest u-boot master and qemu master.
>>>>>>
>>>>>> Command:
>>>>>> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>>>>>>
>>>>>> Tried to load u-boot as well, same.
>>>>>
>>>>>
>>>>> Yes, that command should work with the right patches :). Unfortunately they are not in master yet, but instead waiting in my queue:
>>>>>
>>>>>   https://github.com/agraf/qemu
>>>>>
>>>>> Please give things a try with the ppc-next branch in there. That should get things working for you.
>>>>>
>>>> WORKING! thanks!
>>>>
>>>> Is there any support for flush and/or mtd for this target (-drive
>>>> if=pflash, -mtdblock)?
>>>
>>>
>>> I haven't implemented pflash yet, sorry. Do you need the flash device for configuration storage or as backing storage for your kernel?
>>>
>>
>> Well, I wish both... :)
>>
>> boot qemu as if it were a target....
>>
>> 1. put u-boot on pflash, and boot from it.
>> 2. have backing storage for kernel (can be mtd).
>> 3. have data partition (can be mtd).
>>
>> we can skip (1) as -bios is good enough... but for (2), (3) I do not
>
> For (2) you can use the -kernel option. It should make the payload's physical address available through an environment variable. If it's a uImage, it will get loaded automatically.
> For (3) you can use all the emulated block storage options QEMU provides, such as virtio-pci or ahci.
>

ahci works, thanks I did not know this notation is possible:

qemu .... \
 -device ahci,id=ahci0 \
 -drive  if=none,file=/tmp/img1,format=raw,id=drive-sata0-0-0 \
 -device ide-drive,bus=ahci0.0,drive=drive-sata0-0-0,id=sata0-0-0

Now I see mass storage device on pci bus.

Thanks for the reference!

Now, I am almost sure we are missing commands within the u-boot
configuration to allow accessing the ide/scsi, fsinfo and friends.

>> see solution but have either mtd or other block device support... is
>> that possible?
>
> It's definitely possible, yes :). I simply didn't implement any mtd device emulation so far in the QEMU machine model. But patches are definitely welcome!
>

I would have glad to... However, unfortunately, I am not at that level... :(

Thanks!
Alon

[U-Boot] [ppc] qemu-ppce500 howto

[Alexander Graf]

On 25.05.2014, at 13:33, Alon Bar-Lev <alon.barlev@gmail.com> wrote:

> On Sun, May 25, 2014 at 2:16 PM, Alexander Graf <agraf@suse.de> wrote:
>> 
>> On 25.05.2014, at 13:10, Alon Bar-Lev <alon.barlev@gmail.com> wrote:
>> 
>>> On Sun, May 25, 2014 at 1:08 PM, Alexander Graf <agraf@suse.de> wrote:
>>>> 
>>>> 
>>>> On 24.05.14 09:23, Alon Bar-Lev wrote:
>>>>> 
>>>>> On Thu, May 22, 2014 at 12:04 PM, Alexander Graf <agraf@suse.de> wrote:
>>>>>> 
>>>>>> 
>>>>>> On 22.05.14 09:52, Alon Bar-Lev wrote:
>>>>>>> 
>>>>>>> Hi,
>>>>>>> 
>>>>>>> Trying to run the qemu-ppce500 within qemu. I am using -bios u-boot.bin and no luck, I get live signal.
>>>>>>> 
>>>>>>> I am using latest u-boot master and qemu master.
>>>>>>> 
>>>>>>> Command:
>>>>>>> $ ./qemu-system-ppc -M ppce500 -nographic -bios u-boot.bin
>>>>>>> 
>>>>>>> Tried to load u-boot as well, same.
>>>>>> 
>>>>>> 
>>>>>> Yes, that command should work with the right patches :). Unfortunately they are not in master yet, but instead waiting in my queue:
>>>>>> 
>>>>>>  https://github.com/agraf/qemu
>>>>>> 
>>>>>> Please give things a try with the ppc-next branch in there. That should get things working for you.
>>>>>> 
>>>>> WORKING! thanks!
>>>>> 
>>>>> Is there any support for flush and/or mtd for this target (-drive
>>>>> if=pflash, -mtdblock)?
>>>> 
>>>> 
>>>> I haven't implemented pflash yet, sorry. Do you need the flash device for configuration storage or as backing storage for your kernel?
>>>> 
>>> 
>>> Well, I wish both... :)
>>> 
>>> boot qemu as if it were a target....
>>> 
>>> 1. put u-boot on pflash, and boot from it.
>>> 2. have backing storage for kernel (can be mtd).
>>> 3. have data partition (can be mtd).
>>> 
>>> we can skip (1) as -bios is good enough... but for (2), (3) I do not
>> 
>> For (2) you can use the -kernel option. It should make the payload's physical address available through an environment variable. If it's a uImage, it will get loaded automatically.
>> For (3) you can use all the emulated block storage options QEMU provides, such as virtio-pci or ahci.
>> 
> 
> ahci works, thanks I did not know this notation is possible:
> 
> qemu .... \
> -device ahci,id=ahci0 \
> -drive  if=none,file=/tmp/img1,format=raw,id=drive-sata0-0-0 \
> -device ide-drive,bus=ahci0.0,drive=drive-sata0-0-0,id=sata0-0-0
> 
> Now I see mass storage device on pci bus.
> 
> Thanks for the reference!
> 
> Now, I am almost sure we are missing commands within the u-boot
> configuration to allow accessing the ide/scsi, fsinfo and friends.

Yes, the only device that I managed to get working was the emulated e1000 adapter. There are no virtio drivers in u-boot and the AHCI driver didn't compile for me :).

> 
>>> see solution but have either mtd or other block device support... is
>>> that possible?
>> 
>> It's definitely possible, yes :). I simply didn't implement any mtd device emulation so far in the QEMU machine model. But patches are definitely welcome!
>> 
> 
> I would have glad to... However, unfortunately, I am not at that level... :(

I'll put it on my todo list, but don't expect me to get around to it very soon :)


Alex