On Wed, Jun 20, 2012 at 8:41 PM, Jia Liu <pro...@gmail.com> wrote:
> Hi Max,
>
> On Wed, Jun 20, 2012 at 8:57 PM, Max Filippov <jcmvb...@gmail.com> wrote:
>> On Wed, Jun 20, 2012 at 1:42 PM, Jia Liu <pro...@gmail.com> wrote:
>>> Hi Max,
>>>
>>> On Wed, Jun 20, 2012 at 2:29 PM, Max Filippov <jcmvb...@gmail.com> wrote:
>>>> On 06/18/2012 05:02 AM, Jia Liu wrote:
>>>>> Add a dummy board for IIS.
>>>>>
>>>>> Signed-off-by: Jia Liu<pro...@gmail.com>
>>>>
>>>> [...]
>>>>
>>>>
>>>>> + if (nd_table[0].vlan) {
>>>>> + isa_ne2000_init(isa_bus, 0x92000000, 4,&nd_table[0]);
>>>>> + }
>>>>
>>>> I have noticed that the kernel you provided expects OpenCores ethernet
>>>> device.
>>>> We have a model for it (: You can look at lx60_net_init() in the
>>>> hw/xtensa_lx60.c
>>>> to see how it may be connected.
>>>>
>>>
>>> Thank you very much for remind me!
>>>
>>> Is this code OK?
>>>
>>> static void or1200_net_init(MemoryRegion *address_space,
>>> target_phys_addr_t base,
>>> target_phys_addr_t buffers,
>>> qemu_irq irq, NICInfo *nd)
>>> {
>>> DeviceState *dev;
>>> SysBusDevice *s;
>>> MemoryRegion *ram;
>>>
>>> dev = qdev_create(NULL, "open_eth");
>>> qdev_set_nic_properties(dev, nd);
>>> qdev_init_nofail(dev);
>>>
>>> s = sysbus_from_qdev(dev);
>>> sysbus_connect_irq(s, 0, irq);
>>> memory_region_add_subregion(get_system_memory(), base,
>>> sysbus_mmio_get_region(s, 0));
>>>
>>> ram = g_malloc(sizeof(*ram));
>>> memory_region_init_ram(ram, "open_eth.ram", 0x100);
>>> vmstate_register_ram_global(ram);
>>> memory_region_add_subregion(address_space, buffers, ram);
>>> }
>>
>> You haven't mapped descriptors window. Seems to me it should look like this:
>>
>> static void or1200_net_init(MemoryRegion *address_space,
>> target_phys_addr_t base,
>> target_phys_addr_t descriptors,
>> qemu_irq irq, NICInfo *nd)
>> {
>> DeviceState *dev;
>> SysBusDevice *s;
>>
>> dev = qdev_create(NULL, "open_eth");
>> qdev_set_nic_properties(dev, nd);
>> qdev_init_nofail(dev);
>>
>> s = sysbus_from_qdev(dev);
>> sysbus_connect_irq(s, 0, irq);
>> memory_region_add_subregion(address_space, base,
>> sysbus_mmio_get_region(s, 0));
>> memory_region_add_subregion(address_space, descriptors,
>> sysbus_mmio_get_region(s, 1));
>> }
>>
>
> Thank you very much for the code.
>
>>>
>>> if (nd_table[0].vlan) {
>>> or1200_net_init(get_system_memory(), 0x92000000,
>>> 0x92100000, env->irq[4], nd_table);
>>> }
>>>
>>
>> Also I haven't found where 0x92100000 comes from.
>> Is there a memory map documentation for this machine?
>>
>
> I'm confused about descriptors, I'm not sure whether 0x92100000 is suitable.
>
> I find the code in linux/arch/openrisc/boot/dts/or1ksim.dts
> enet0: ethoc@92000000 {
> compatible = "opencores,ethmac-rtlsvn338";
> reg = <0x92000000 0x100>;
> interrupts = <4>;
> };
>
> but I'm not sure what value should a pass to target_phys_addr_t
> descriptors, that is, I don't know how can I get the address of
> descriptors.
Ok, with
if (nd_table[0].vlan) {
- isa_ne2000_init(isa_bus, 0x92000000, 4, &nd_table[0]);
+ openrisc_sim_net_init(get_system_memory(), 0x92000000,
+ 0x92000400, env->irq[4], nd_table);
}
I was able to ping the host from the guest. I guess that from OpenCores ethernet
perspective descriptors window is a logical continuation of the
registers window,
always starting at offset 0x400.
I will post a patch that you can squish into this ISS dummy board patch.
--
Thanks.
-- Max
