Date: Wed, 12 Dec 2001 14:54:26 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: "Chuck T." <freebsdfan@hotmail.com> Cc: freebsd-small@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: help with loadable module & PicoBSD Message-ID: <Pine.BSF.4.21.0112121453240.5654-100000@InterJet.elischer.org> In-Reply-To: <F20wWkVNqXSvUkBAB7p00001664@hotmail.com>
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also look at (in current
only!) /usr/share/examples/drivers/make_device_driver.sh
is makes a driver with ISA, and PCI-based interfaces.
On Wed, 12 Dec 2001, Chuck T. wrote:
> I'm trying to write an ISA device driver from scratch and I'm also trying to
> make it a kernel loadable to make my debugging life easier. I started with
> /usr/share/examples/kld/cdev and have modified it by adding the following:
>
> static int
> xxx_isa_probe(device_t dev)
> {
> int ret = ENXIO;
>
> device_printf(dev,"xxx_isa_probe() called.\n");
>
> if(device_get_unit(dev) == 0) {
> ret = 0;
> }
> return ret;
> }
>
> static int
> xxx_isa_attach(device_t dev)
> {
> device_printf(dev,"xxx_isa_attach() called.\n");
> return 0;
> }
>
> static int
> xxx_isa_detach(device_t dev)
> {
> device_printf(dev,"xxx_isa_detach() called.\n");
> return 0;
> }
>
> static struct isa_pnp_id xxx_ids[] = {
> { 0, NULL }
> };
>
> static device_method_t xxx_isa_methods[] = {
> /* Device interface */
> DEVMETHOD(device_probe, xxx_isa_probe),
> DEVMETHOD(device_attach, xxx_isa_attach),
> DEVMETHOD(device_detach, xxx_isa_detach),
>
> { 0, 0 }
> };
>
> static driver_t xxx_isa_driver = {
> driver_name,
> xxx_isa_methods,
> 0
> };
>
> static devclass_t xxx_devclass;
>
> /* Declare the module to the system */
> DRIVER_MODULE(xxx, isa, xxx_isa_driver, xxx_devclass, cdev_load, 0);
>
> When I load the skeletion on my development machine (FreeBSD 4.4) both
> cdev_load() and xxx_isa_probe() are called as expected. However when I load
> the same binary on my PicoBSD target it only cdev_load() is called, *NOT*
> xxx_isa_probe(). My PicoBSD is built from the same sources as my
> development machine and both are FreeBSD 4.4-release. Both include the isa
> bus in their configuration files. I'm sure I'm doing something wrong as I
> have been able to load stock Ethernet driver kernel modules on Pico before.
>
> Any suggestions ? I'm lost. I tried removing the stripping step in the
> PicoBSD build thinking that was on obvious difference between a Pico build
> and a full build, but that didn't help.
>
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