1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * natfeat.c - ARAnyM hardware support via Native Features (natfeats)
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Reworked for Linux by Roman Zippel <zippel@linux-m68k.org>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * This software may be used and distributed according to the terms of
9*4882a593Smuzhiyun * the GNU General Public License (GPL), incorporated herein by reference.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/types.h>
14*4882a593Smuzhiyun #include <linux/console.h>
15*4882a593Smuzhiyun #include <linux/string.h>
16*4882a593Smuzhiyun #include <linux/kernel.h>
17*4882a593Smuzhiyun #include <linux/module.h>
18*4882a593Smuzhiyun #include <linux/io.h>
19*4882a593Smuzhiyun #include <asm/machdep.h>
20*4882a593Smuzhiyun #include <asm/natfeat.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun extern long nf_get_id_phys(unsigned long feature_name);
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun asm("\n"
25*4882a593Smuzhiyun " .global nf_get_id_phys,nf_call\n"
26*4882a593Smuzhiyun "nf_get_id_phys:\n"
27*4882a593Smuzhiyun " .short 0x7300\n"
28*4882a593Smuzhiyun " rts\n"
29*4882a593Smuzhiyun "nf_call:\n"
30*4882a593Smuzhiyun " .short 0x7301\n"
31*4882a593Smuzhiyun " rts\n"
32*4882a593Smuzhiyun "1: moveq.l #0,%d0\n"
33*4882a593Smuzhiyun " rts\n"
34*4882a593Smuzhiyun " .section __ex_table,\"a\"\n"
35*4882a593Smuzhiyun " .long nf_get_id_phys,1b\n"
36*4882a593Smuzhiyun " .long nf_call,1b\n"
37*4882a593Smuzhiyun " .previous");
38*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(nf_call);
39*4882a593Smuzhiyun
nf_get_id(const char * feature_name)40*4882a593Smuzhiyun long nf_get_id(const char *feature_name)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun /* feature_name may be in vmalloc()ed memory, so make a copy */
43*4882a593Smuzhiyun char name_copy[32];
44*4882a593Smuzhiyun size_t n;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun n = strlcpy(name_copy, feature_name, sizeof(name_copy));
47*4882a593Smuzhiyun if (n >= sizeof(name_copy))
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun return nf_get_id_phys(virt_to_phys(name_copy));
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(nf_get_id);
53*4882a593Smuzhiyun
nfprint(const char * fmt,...)54*4882a593Smuzhiyun void nfprint(const char *fmt, ...)
55*4882a593Smuzhiyun {
56*4882a593Smuzhiyun static char buf[256];
57*4882a593Smuzhiyun va_list ap;
58*4882a593Smuzhiyun int n;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun va_start(ap, fmt);
61*4882a593Smuzhiyun n = vsnprintf(buf, 256, fmt, ap);
62*4882a593Smuzhiyun nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf));
63*4882a593Smuzhiyun va_end(ap);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
nf_poweroff(void)66*4882a593Smuzhiyun static void nf_poweroff(void)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun long id = nf_get_id("NF_SHUTDOWN");
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun if (id)
71*4882a593Smuzhiyun nf_call(id);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
nf_init(void)74*4882a593Smuzhiyun void __init nf_init(void)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun unsigned long id, version;
77*4882a593Smuzhiyun char buf[256];
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun id = nf_get_id("NF_VERSION");
80*4882a593Smuzhiyun if (!id)
81*4882a593Smuzhiyun return;
82*4882a593Smuzhiyun version = nf_call(id);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun id = nf_get_id("NF_NAME");
85*4882a593Smuzhiyun if (!id)
86*4882a593Smuzhiyun return;
87*4882a593Smuzhiyun nf_call(id, virt_to_phys(buf), 256);
88*4882a593Smuzhiyun buf[255] = 0;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
91*4882a593Smuzhiyun version & 0xffff);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun mach_power_off = nf_poweroff;
94*4882a593Smuzhiyun }
95