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/types.h>
13 #include <linux/console.h>
14 #include <linux/string.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/io.h>
18 #include <asm/machdep.h>
19 #include <asm/natfeat.h>
20
21 extern long nf_get_id2(const char *feature_name);
22
23 asm("\n"
24 " .global nf_get_id2,nf_call\n"
25 "nf_get_id2:\n"
26 " .short 0x7300\n"
27 " rts\n"
28 "nf_call:\n"
29 " .short 0x7301\n"
30 " rts\n"
31 "1: moveq.l #0,%d0\n"
32 " rts\n"
33 " .section __ex_table,\"a\"\n"
34 " .long nf_get_id2,1b\n"
35 " .long nf_call,1b\n"
36 " .previous");
37 EXPORT_SYMBOL_GPL(nf_call);
38
nf_get_id(const char * feature_name)39 long nf_get_id(const char *feature_name)
40 {
41 /* feature_name may be in vmalloc()ed memory, so make a copy */
42 char name_copy[32];
43 size_t n;
44
45 n = strlcpy(name_copy, feature_name, sizeof(name_copy));
46 if (n >= sizeof(name_copy))
47 return 0;
48
49 return nf_get_id2(name_copy);
50 }
51 EXPORT_SYMBOL_GPL(nf_get_id);
52
nfprint(const char * fmt,...)53 void nfprint(const char *fmt, ...)
54 {
55 static char buf[256];
56 va_list ap;
57 int n;
58
59 va_start(ap, fmt);
60 n = vsnprintf(buf, 256, fmt, ap);
61 nf_call(nf_get_id("NF_STDERR"), buf);
62 va_end(ap);
63 }
64
nf_poweroff(void)65 static void nf_poweroff(void)
66 {
67 long id = nf_get_id("NF_SHUTDOWN");
68
69 if (id)
70 nf_call(id);
71 }
72
nf_init(void)73 void nf_init(void)
74 {
75 unsigned long id, version;
76 char buf[256];
77
78 id = nf_get_id("NF_VERSION");
79 if (!id)
80 return;
81 version = nf_call(id);
82
83 id = nf_get_id("NF_NAME");
84 if (!id)
85 return;
86 nf_call(id, buf, 256);
87 buf[255] = 0;
88
89 pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
90 version & 0xffff);
91
92 mach_power_off = nf_poweroff;
93 }
94