xbox.c revision 177253 
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: head/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
42static void
43xbox_poweroff(void* junk, int howto)
44{
45	if (!(howto & RB_POWEROFF))
46		return;
47
48	pic16l_poweroff();
49}
50
51static void
52xbox_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 */
85SYSINIT(xbox, SI_SUB_DRIVERS, SI_ORDER_FIRST, xbox_init, NULL);
86