FreeBSD/Linux Kernel Cross Reference
sys/i386/xbox/xbox.c

     /*-
      * Copyright (c) 2005 Rink Springer
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/eventhandler.h>
    #include <sys/reboot.h>
    #include <machine/xbox.h>
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #ifndef I686_CPU
    #error You must have a I686_CPU in your kernel if you want to make an XBOX-compatible kernel
    #endif
    
    static void
    xbox_poweroff(void* junk, int howto)
    {
            if (!(howto & RB_POWEROFF))
                    return;
    
            pic16l_poweroff();
    }
    
    static void
    xbox_init(void)
    {
            char* ptr;
    
            if (!arch_i386_is_xbox)
                    return;
    
            /* register our poweroff function */
            EVENTHANDLER_REGISTER (shutdown_final, xbox_poweroff, NULL,
                                   SHUTDOWN_PRI_LAST);
    
            /*
             * Some XBOX loaders, such as Cromwell, have a flaw which cause the
             * nve(4) driver to fail attaching to the NIC.
             *
             * This is because they leave the NIC running; this will cause the
             * Nvidia driver to fail as the NIC does not return any sensible
             * values and thus fails attaching (using an error 0x5, this means
             * it cannot find a valid PHY)
             *
             * We bluntly tell the NIC to stop whatever it's doing; this makes
             * nve(4) attach correctly. As the NIC always resides at
             * 0xfef00000-0xfef003ff on an XBOX, we simply hardcode this address.
             */
            ptr = pmap_mapdev (0xfef00000, 0x400);
            *(uint32_t*)(ptr + 0x188) = 0; /* clear adapter control field */
            pmap_unmapdev ((vm_offset_t)ptr, 0x400);
    }
    
    /*
     * This must be called before the drivers, as the if_nve(4) driver will fail
     * if we do not do this in advance.
     */
    SYSINIT(xbox, SI_SUB_DRIVERS, SI_ORDER_FIRST, xbox_init, NULL)

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