Merge tag 'v3.14-rc1' into patchwork
[linux-2.6-microblaze.git] / arch / m68k / emu / natfeat.c
1 /*
2  * natfeat.c - ARAnyM hardware support via Native Features (natfeats)
3  *
4  * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
5  *
6  * Reworked for Linux by Roman Zippel <zippel@linux-m68k.org>
7  *
8  * This software may be used and distributed according to the terms of
9  * the GNU General Public License (GPL), incorporated herein by reference.
10  */
11
12 #include <linux/init.h>
13 #include <linux/types.h>
14 #include <linux/console.h>
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/io.h>
19 #include <asm/machdep.h>
20 #include <asm/natfeat.h>
21
22 extern long nf_get_id_phys(unsigned long feature_name);
23
24 asm("\n"
25 "       .global nf_get_id_phys,nf_call\n"
26 "nf_get_id_phys:\n"
27 "       .short  0x7300\n"
28 "       rts\n"
29 "nf_call:\n"
30 "       .short  0x7301\n"
31 "       rts\n"
32 "1:     moveq.l #0,%d0\n"
33 "       rts\n"
34 "       .section __ex_table,\"a\"\n"
35 "       .long   nf_get_id_phys,1b\n"
36 "       .long   nf_call,1b\n"
37 "       .previous");
38 EXPORT_SYMBOL_GPL(nf_call);
39
40 long nf_get_id(const char *feature_name)
41 {
42         /* feature_name may be in vmalloc()ed memory, so make a copy */
43         char name_copy[32];
44         size_t n;
45
46         n = strlcpy(name_copy, feature_name, sizeof(name_copy));
47         if (n >= sizeof(name_copy))
48                 return 0;
49
50         return nf_get_id_phys(virt_to_phys(name_copy));
51 }
52 EXPORT_SYMBOL_GPL(nf_get_id);
53
54 void nfprint(const char *fmt, ...)
55 {
56         static char buf[256];
57         va_list ap;
58         int n;
59
60         va_start(ap, fmt);
61         n = vsnprintf(buf, 256, fmt, ap);
62         nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf));
63         va_end(ap);
64 }
65
66 static void nf_poweroff(void)
67 {
68         long id = nf_get_id("NF_SHUTDOWN");
69
70         if (id)
71                 nf_call(id);
72 }
73
74 void __init nf_init(void)
75 {
76         unsigned long id, version;
77         char buf[256];
78
79         id = nf_get_id("NF_VERSION");
80         if (!id)
81                 return;
82         version = nf_call(id);
83
84         id = nf_get_id("NF_NAME");
85         if (!id)
86                 return;
87         nf_call(id, virt_to_phys(buf), 256);
88         buf[255] = 0;
89
90         pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
91                 version & 0xffff);
92
93         mach_power_off = nf_poweroff;
94 }