platform_wii.c revision 266020 
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: stable/10/sys/powerpc/wii/platform_wii.c 266020 2014-05-14 14:17:51Z ian $");
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 *);
62static void		wii_reset(platform_t);
63static void		wii_cpu_idle(sbintime_t);
64
65extern void		 wiibus_reset_system(void);
66
67static platform_method_t wii_methods[] = {
68	PLATFORMMETHOD(platform_probe,		wii_probe),
69	PLATFORMMETHOD(platform_attach,		wii_attach),
70	PLATFORMMETHOD(platform_mem_regions,	wii_mem_regions),
71	PLATFORMMETHOD(platform_timebase_freq,	wii_timebase_freq),
72	PLATFORMMETHOD(platform_reset,		wii_reset),
73
74	PLATFORMMETHOD_END
75};
76
77static platform_def_t wii_platform = {
78	"wii",
79	wii_methods,
80	0
81};
82
83PLATFORM_DEF(wii_platform);
84
85static int
86wii_probe(platform_t plat)
87{
88	register_t vers = mfpvr();
89
90	/*
91	 * The Wii includes a PowerPC 750CL with custom modifications
92	 * ("Broadway").
93	 * For now, we just assume that if we are running on a
94	 * PowerPC 750CL, then this platform is a Nintendo Wii.
95	 */
96	if ((vers & 0xfffff0e0) == (MPC750 << 16 | MPC750CL))
97		return (BUS_PROBE_SPECIFIC);
98
99	return (ENXIO);
100}
101
102static int
103wii_attach(platform_t plat)
104{
105	cpu_idle_hook = wii_cpu_idle;
106
107	return (0);
108}
109
110static void
111wii_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
112    struct mem_region *avail_regions, int *availsz)
113{
114	/* 24MB 1T-SRAM */
115	avail_regions[0].mr_start = 0x00000000;
116	avail_regions[0].mr_size  = 0x01800000;
117
118	/*
119	 * Reserve space for the framebuffer which is located
120	 * at the end of this 24MB memory region. See wii_fbreg.h.
121	 */
122	avail_regions[0].mr_size -= WIIFB_FB_LEN;
123
124	/* 64MB GDDR3 SDRAM */
125	avail_regions[1].mr_start = 0x10000000;
126	avail_regions[1].mr_size  = 0x04000000;
127
128	/*
129	 * Reserve space for the DSP.
130	 */
131	avail_regions[1].mr_start += 0x4000;
132	avail_regions[1].mr_size -= 0x4000;
133
134	/*
135	 * Reserve space for the IOS I/O memory.
136	 */
137	avail_regions[1].mr_size -= WIIIPC_IOH_LEN + 1;
138
139	memcpy(phys, avail_regions, 2*sizeof(*avail_regions));
140	*physsz = *availsz = 2;
141}
142
143static u_long
144wii_timebase_freq(platform_t plat, struct cpuref *cpuref)
145{
146
147	/* Bus Frequency (243MHz) / 4 */
148	return (60750000);
149}
150
151static void
152wii_reset(platform_t plat __unused)
153{
154
155	wiibus_reset_system();
156}
157
158static void
159wii_cpu_idle(sbintime_t sbt)
160{
161}
162