The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2005 Rink Springer
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/10.3/sys/i386/xbox/xbox.c 177253 2008-03-16 10:58:09Z rwatson $
   28  */
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/kernel.h>
   32 #include <sys/eventhandler.h>
   33 #include <sys/reboot.h>
   34 #include <machine/xbox.h>
   35 #include <vm/vm.h>
   36 #include <vm/pmap.h>
   37 
   38 #ifndef I686_CPU
   39 #error You must have a I686_CPU in your kernel if you want to make an XBOX-compatible kernel
   40 #endif
   41 
   42 static void
   43 xbox_poweroff(void* junk, int howto)
   44 {
   45         if (!(howto & RB_POWEROFF))
   46                 return;
   47 
   48         pic16l_poweroff();
   49 }
   50 
   51 static void
   52 xbox_init(void)
   53 {
   54         char* ptr;
   55 
   56         if (!arch_i386_is_xbox)
   57                 return;
   58 
   59         /* register our poweroff function */
   60         EVENTHANDLER_REGISTER (shutdown_final, xbox_poweroff, NULL,
   61                                SHUTDOWN_PRI_LAST);
   62 
   63         /*
   64          * Some XBOX loaders, such as Cromwell, have a flaw which cause the
   65          * nve(4) driver to fail attaching to the NIC.
   66          *
   67          * This is because they leave the NIC running; this will cause the
   68          * Nvidia driver to fail as the NIC does not return any sensible
   69          * values and thus fails attaching (using an error 0x5, this means
   70          * it cannot find a valid PHY)
   71          *
   72          * We bluntly tell the NIC to stop whatever it's doing; this makes
   73          * nve(4) attach correctly. As the NIC always resides at
   74          * 0xfef00000-0xfef003ff on an XBOX, we simply hardcode this address.
   75          */
   76         ptr = pmap_mapdev (0xfef00000, 0x400);
   77         *(uint32_t*)(ptr + 0x188) = 0; /* clear adapter control field */
   78         pmap_unmapdev ((vm_offset_t)ptr, 0x400);
   79 }
   80 
   81 /*
   82  * This must be called before the drivers, as the if_nve(4) driver will fail
   83  * if we do not do this in advance.
   84  */
   85 SYSINIT(xbox, SI_SUB_DRIVERS, SI_ORDER_FIRST, xbox_init, NULL);

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