FreeBSD/Linux Kernel Cross Reference
sys/i386/xbox/xbox.c
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/6.4/sys/i386/xbox/xbox.c 161534 2006-08-22 16:52:42Z rink $
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 #include "opt_global.h"
38
39 #ifndef I686_CPU
40 #error You must have a I686_CPU in your kernel if you want to make an XBOX-compitable kernel
41 #endif
42
43 static void
44 xbox_poweroff(void* junk, int howto)
45 {
46 if (!(howto & RB_POWEROFF))
47 return;
48
49 pic16l_poweroff();
50 }
51
52 static void
53 xbox_init(void)
54 {
55 char* ptr;
56
57 if (!arch_i386_is_xbox)
58 return;
59
60 /* register our poweroff function */
61 EVENTHANDLER_REGISTER (shutdown_final, xbox_poweroff, NULL,
62 SHUTDOWN_PRI_LAST);
63
64 /*
65 * Some XBOX loaders, such as Cromwell, have a flaw which cause the
66 * nve(4) driver to fail attaching to the NIC.
67 *
68 * This is because they leave the NIC running; this will cause the
69 * Nvidia driver to fail as the NIC does not return any sensible
70 * values and thus fails attaching (using an error 0x5, this means
71 * it cannot find a valid PHY)
72 *
73 * We bluntly tell the NIC to stop whatever it's doing; this makes
74 * nve(4) attach correctly. As the NIC always resides at
75 * 0xfef00000-0xfef003ff on an XBOX, we simply hardcode this address.
76 */
77 ptr = pmap_mapdev (0xfef00000, 0x400);
78 *(uint32_t*)(ptr + 0x188) = 0; /* clear adapter control field */
79 pmap_unmapdev ((vm_offset_t)ptr, 0x400);
80 }
81
82 /*
83 * This must be called before the drivers, as the if_nve(4) driver will fail
84 * if we do not do this in advance.
85 */
86 SYSINIT(xbox, SI_SUB_DRIVERS, SI_ORDER_FIRST, xbox_init, NULL)
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