Re: FreeBSD/xbox: updated 7.0 patchset

From: John Baldwin (jhb_at_freebsd.org)
Date: 11/07/05

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    To: freebsd-arch@freebsd.org
Date: Mon, 7 Nov 2005 11:18:34 -0500

    On Sunday 06 November 2005 05:23 pm, Rink Springer wrote:
    > Hello everyone,
    >
    > I'd like to present my 7.0-CURRENT XBOX patches. If you put 'options
    > XBOX' in your kernel after applying this patch, you will get a kernel
    > that is bootable on both ordinary i386 PC's as well as XBOX'es. 'device
    > xboxfb' is an XBOX-capable frame buffer.
    >
    > You can download the patches from
    > http://rink.nu/downloads/xbox-patches/xbox-7-current.diff. I hope this
    > patch will be committed to the FreeBSD source tree. Let me know any
    > suggestions for improvements.
    >
    > The XBOX option depends on I686_CPU and will error out if it is not
    > supplied. The overall patch is just over 1000 lines, mainly due to the
    > framebuffer driver. You will need the most recent CVS version of
    > Cromwell [1], as it now fakes FreeBSD boot info so the initial entry
    > won't halt the CPU. This removes the patches in the locore.s file.
    >
    > For some reason, the kernel will not work fine if you have syscons in your
    > kernel. This only affects the XBOX, so either syscons crashes it somehow
    > or it gets a higher priority. However, as the current framedriver driver
    > needs to be syscon(4)-ized, I intend to port the framebuffer to the VESA
    > framework. Assistance on this is very welcome.
    >
    > Finally, I am willing to maintain this so future FreeBSD's will run on
    > the XBOX without any issues. Work is underway for the nForce ethernet as
    > well as an improved syscons(4)-able console driver.
    >
    > [1] This is the Linux BIOS for the XBOX; it was patched in order to boot
    > FreeBSD correctly.

    It might be nice to have as much of pci16l.s in C as possible for ease of
    maintenance. For example, at least two of the functions I looked at in there
    just call a p16l_setbits() and that could be done via an inline function in a
    header file. 

    -- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org
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