Re: [ECOS] __NETDEVTAB__ length is zero

[Chandra Sekhar G <chandra at danlawinc dot com>]

Andrew Lunn wrote:

> > > You'll need to provide a network driver structure for your controller.
> > > Look at the driver provided for the Cirrus Logic EDB7xxx family of
> > > processors for an example.
> > >   .../devs/eth/arm/edb7xxx/
> >
> > Hi,
> >
> >     The controller we are using is cs8900.  We are directly using the driver
> > code of ..../dev/eth/arm/edb7xx/, after putting in a proper directory
> > structure and a few modifications to the addresses.  All the related cdl
> > files are also identical.  Still the problem persists.
>
> NETDEVTAB_ENTRY(edb7xxx_netdev,
>                 "edb7xxx",
>                 edb7xxx_cs8900_init,
>                 &edb7xxx_sc);
>
> This should be putting an entry into the table.
>
> Make sure this is being compiled. You can also look at the symbols in
> the object produced from this source. I use the ebsa driver with two
> ethernet devices.....
>
> arm-elf-objdump --syms devs_eth_arm_ebsa285_if_ebsa285.o | grep netdev
> 00000000 l    d  .ecos.table.netdev.data.ebsa285_netdev0        00000000
> 00000000 l    d  .ecos.table.netdev.data.ebsa285_netdev1        00000000
> 00000000 g     O .ecos.table.netdev.data.ebsa285_netdev0        00000010 ebsa285_netdev0
> 00000000 g     O .ecos.table.netdev.data.ebsa285_netdev1        00000010 ebsa285_netdev1
>
> and the same for install/lib/extra.o
>
> arm-elf-objdump --syms extras.o | grep netdev
> 000000f4 l    d  .ecos.table.netdev.data.ebsa285_netdev0        00000000
> 000001f8 l    d  .ecos.table.netdev.data.ebsa285_netdev1        00000000
> 000000f4 g     O .ecos.table.netdev.data.ebsa285_netdev0        00000010 ebsa285_netdev0
> 000001f8 g     O .ecos.table.netdev.data.ebsa285_netdev1        00000010 ebsa285_netdev1
>
>     Andrew

Hi Andrew,

      The part of the code you gave is getting compiled.  For the commands you suggested
the output is also as you said.  When I link the libraries with an application and see the
objdump I get same addresses for both of the following

  __NETDEVTAB__  and __NETDEVTAB_END__.

Also the command you suggested when ran on an application gave me the following.
002fc000 l    d  .ecos.table.netdev.finish 00000000
002fc000 l    d  .ecos.table.netdev.begin 00000000
002fc000 l    d  .ecos.table.netdev.data 00000000
002fc000 g     O .ecos.table.netdev.data 00000010 edb7xxx_netdev

The following piece of code in the 'cyg_net_init' routine of 'support.c' is not executing,
even once.   And I am able to run the loop back tests.

    for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
//        diag_printf("Init device '%s'\n", t->name);
        if (t->init(t)) {
            t->status = CYG_NETDEVTAB_STATUS_AVAIL;
        } else {
            // What to do if device init fails?
            t->status = 0;  // Device not [currently] available
        }
    }
    // And attach the loopback interface


Thanks in advance.

regards,
chandra