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Re: [Qemu-ppc] QEMU powerpc embedded architecture base address problem


From: Alexander Graf
Subject: Re: [Qemu-ppc] QEMU powerpc embedded architecture base address problem
Date: Mon, 13 May 2013 13:51:15 +0200

On 13.05.2013, at 13:34, Sijia Li wrote:

> On 13/05/13 11:24, Alexander Graf wrote:
>> 
>> On 13.05.2013, at 11:18, 李思嘉 wrote:
>> 
>>> Thanks a lot. 
>> 
>> Please don't top post. Please always keep qemu-ppc CC'ed.
>> 
>>> 
>>> I am using the newest version of QEMU, which is QEMU 1.5.0. I want to test 
>>> my network card driver for NE2000. But it seems like it doesn't support 
>>> NE2000 when I add attribute -M ref405ep -cpu 401100c4 or -M taihu -cpu 
>>> 401100c4. Because after running the virtual machine, there warning shows up:
>>> 
>>> Warning: hub port hub0port1 has no peer
>>> Warning: vlan 0 with no nics
>>> Warning: netdev hub0port1 has no peer
>>> Warning: requested NIC (anonymous, model ne2k_pci) was not created (not 
>>> supported by this machine?)
>>> 
>>> I read the QEMU Emulator User Documentation, it said the user can add 
>>> attribute "-net nic, model=?" to get the list of available devices for the 
>>> specific target.
>>> But it doesn't work. 
>>> 
>>> So what can I do for creating a NIC in ref405ep or taihu platform? Or if 
>>> both of  these platforms can't add NIC, what else platforms which runs with 
>>> CPU powerpc 405 can add a NE2000 NIC or other network card?
>> 
>> It looks as if the 40x machine models don't spawn NICs according to the -net 
>> configuration then. As mentioned in my earlier email, they aren't actively 
>> developed anymore. Currently actively developed targets are: e500plat, 
>> mpc8544ds, bamboo, prep, g3beige, mac99, pseries.
>> 
>> You can try to spawn the ne2k device manually using -netdev and -device. If 
>> the PCI adapter on the respective SoCs has been qdev'ified, that should work 
>> despite the -net hickups.
>> 
>>   http://wiki.qemu.org/Documentation/Networking
>> 
>> 
>> Alex
> 
> 
> Sorry for the top post. From now, I will reply email from the end of the mail.
> 
> I added attributes " -device ppc4xx-pcihost -device

This means that the machine doesn't spawn a PCI host controller. Does the board 
even have PCI?

> ne2k_pci -net tap". 
> 
> Two problems happened:
> 1. After running the emulator, I use telnet to monitor the VM. When I input 
> the command "info qtree", the result is as following.
> QEMU 1.4.91 monitor - type 'help' for more information
> (qemu) info qtree
> bus: main-system-bus
>   type System
>   dev: ppc4xx-pcihost, id ""
>     irq 4
>     mmio ffffffffffffffff/0000000000800040
>     bus: pci.0
>       type PCI
>       dev: ne2k_pci, id ""
>         mac = 52:54:00:12:34:56
>         vlan = <null>
>         netdev = <null>
>         bootindex = -1
>         addr = 01.0
>         romfile = "efi-ne2k_pci.rom"
>         rombar = 1
>         multifunction = off
>         command_serr_enable = on
>         class Ethernet controller, addr 00:01.0, pci id 10ec:8029 (sub 
> 1af4:1100)
>         bar 0: i/o at 0xffffffffffffffff [0xfe]
>         bar 6: mem at 0xffffffffffffffff [0x3fffe]
>       dev: ppc4xx-host-bridge, id ""
>         addr = 00.0
>         romfile = <null>
>         rombar = 1
>         multifunction = off
>         command_serr_enable = on
>         class Bridge, addr 00:00.0, pci id 1014:027f (sub 1af4:1100)
>   dev: m48t59, id ""
>     size = 8192
>     model = 8
>     io_base = 0x0
>     irq 1
>     mmio 00000000f0000000/0000000000002000
> 
> And the result of "info mtree" is as following:
> (qemu) info mtree
> memory
> 0000000000000000-7ffffffffffffffe (prio 0, RW): system
>   0000000000000000-0000000007ffffff (prio 0, RW): sdram-containers
>     0000000000000000-0000000007ffffff (prio 0, RW): ef405ep.ram
>   00000000ef600000-00000000ef6000d3 (prio 0, RW): gpt
>   00000000ef600300-00000000ef600307 (prio 0, RW): serial
>   00000000ef600500-00000000ef600510 (prio 0, RW): i2c
>   00000000ef600600-00000000ef600601 (prio 0, RW): opba
>   00000000ef600700-00000000ef600737 (prio 0, RW): pgio
>   00000000f0000000-00000000f0001fff (prio 0, RW): m48t59.nvram
>   00000000f0300000-00000000f03000ff (prio 0, RW): fpga
>   00000000fff00000-00000000fff7ffff (prio 0, RW): ef405ep.sram
>   00000000fff80000-000000010017ffff (prio 0, R-): ef405ep.bios
> I/O
> 0000000000000000-000000000000ffff (prio 0, RW): io
> aliases
> 
> Could you help me to find the base address of my NIC "ne2k_pci"?

The base address is defined through the BAR registers that your OS needs to set 
up inside of the PCI host controller.

> 
> 
> 2.  Warning: vlan 0 with no nics
>     Warning: nic ne2k_pci.0 has no peer
>     Two warnings show when I ran the emulator. 
> How can I fix these two warning?

Just pass -net none to qemu.


Alex




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