platform_wii.c revision 247454 
1/*-
2 * Copyright (C) 2012 Margarida Gouveia
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 *    without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/powerpc/wii/platform_wii.c 247454 2013-02-28 10:46:54Z davide $");
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/bus.h>
33#include <sys/pcpu.h>
34#include <sys/proc.h>
35#include <sys/reboot.h>
36#include <sys/smp.h>
37#include <sys/fbio.h>
38
39#include <vm/vm.h>
40#include <vm/pmap.h>
41
42#include <machine/bus.h>
43#include <machine/cpu.h>
44#include <machine/hid.h>
45#include <machine/platform.h>
46#include <machine/platformvar.h>
47#include <machine/pmap.h>
48#include <machine/smp.h>
49#include <machine/spr.h>
50#include <machine/vmparam.h>
51
52#include <powerpc/wii/wii_fbreg.h>
53#include <powerpc/wii/wii_ipcreg.h>
54
55#include "platform_if.h"
56
57static int		wii_probe(platform_t);
58static int		wii_attach(platform_t);
59static void		wii_mem_regions(platform_t, struct mem_region **,
60			    int *, struct mem_region **, int *);
61static unsigned long	wii_timebase_freq(platform_t, struct cpuref *cpuref);
62static void		wii_reset(platform_t);
63static void		wii_cpu_idle(sbintime_t sbt);
64
65static platform_method_t wii_methods[] = {
66	PLATFORMMETHOD(platform_probe,		wii_probe),
67	PLATFORMMETHOD(platform_attach,		wii_attach),
68	PLATFORMMETHOD(platform_mem_regions,	wii_mem_regions),
69	PLATFORMMETHOD(platform_timebase_freq,	wii_timebase_freq),
70	PLATFORMMETHOD(platform_reset,		wii_reset),
71
72	PLATFORMMETHOD_END
73};
74
75static platform_def_t wii_platform = {
76	"wii",
77	wii_methods,
78	0
79};
80
81PLATFORM_DEF(wii_platform);
82
83static int
84wii_probe(platform_t plat)
85{
86	register_t vers = mfpvr();
87
88	/*
89	 * The Wii includes a PowerPC 750CL with custom modifications
90	 * ("Broadway").
91	 * For now, we just assume that if we are running on a
92	 * PowerPC 750CL, then this platform is a Nintendo Wii.
93	 */
94	if ((vers & 0xfffff0e0) == (MPC750 << 16 | MPC750CL))
95		return (BUS_PROBE_SPECIFIC);
96
97	return (ENXIO);
98}
99
100static int
101wii_attach(platform_t plat)
102{
103	cpu_idle_hook = wii_cpu_idle;
104
105	return (0);
106}
107
108#define MEM_REGIONS     2
109static struct mem_region avail_regions[MEM_REGIONS];
110
111static void
112wii_mem_regions(platform_t plat, struct mem_region **phys, int *physsz,
113    struct mem_region **avail, int *availsz)
114{
115	/* 24MB 1T-SRAM */
116	avail_regions[0].mr_start = 0x00000000;
117	avail_regions[0].mr_size  = 0x01800000;
118
119	/*
120	 * Reserve space for the framebuffer which is located
121	 * at the end of this 24MB memory region. See wii_fbreg.h.
122	 */
123	avail_regions[0].mr_size -= WIIFB_FB_LEN;
124
125	/* 64MB GDDR3 SDRAM */
126	avail_regions[1].mr_start = 0x10000000;
127	avail_regions[1].mr_size  = 0x04000000;
128
129	/*
130	 * Reserve space for the DSP.
131	 */
132	avail_regions[1].mr_start += 0x4000;
133	avail_regions[1].mr_size -= 0x4000;
134
135	/*
136	 * Reserve space for the IOS I/O memory.
137	 */
138	avail_regions[1].mr_size -= WIIIPC_IOH_LEN + 1;
139
140	*phys = *avail = avail_regions;
141	*physsz = *availsz = MEM_REGIONS;
142}
143
144static u_long
145wii_timebase_freq(platform_t plat, struct cpuref *cpuref)
146{
147
148	/* Bus Frequency (243MHz) / 4 */
149	return (60750000);
150}
151
152static void
153wii_reset(platform_t plat)
154{
155}
156
157static void
158wii_cpu_idle(sbintime_t sbt)
159{
160}
161