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/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 asm("\n"
  22 "       .global nf_get_id,nf_call\n"
  23 "nf_get_id:\n"
  24 "       .short  0x7300\n"
  25 "       rts\n"
  26 "nf_call:\n"
  27 "       .short  0x7301\n"
  28 "       rts\n"
  29 "1:     moveq.l #0,%d0\n"
  30 "       rts\n"
  31 "       .section __ex_table,\"a\"\n"
  32 "       .long   nf_get_id,1b\n"
  33 "       .long   nf_call,1b\n"
  34 "       .previous");
  35 EXPORT_SYMBOL_GPL(nf_get_id);
  36 EXPORT_SYMBOL_GPL(nf_call);
  37
  38 void nfprint(const char *fmt, ...)
  39 {
  40         static char buf[256];
  41         va_list ap;
  42         int n;
  43
  44         va_start(ap, fmt);
  45         n = vsnprintf(buf, 256, fmt, ap);
  46         nf_call(nf_get_id("NF_STDERR"), buf);
  47         va_end(ap);
  48 }
  49
  50 static void nf_poweroff(void)
  51 {
  52         long id = nf_get_id("NF_SHUTDOWN");
  53
  54         if (id)
  55                 nf_call(id);
  56 }
  57
  58 void nf_init(void)
  59 {
  60         unsigned long id, version;
  61         char buf[256];
  62
  63         id = nf_get_id("NF_VERSION");
  64         if (!id)
  65                 return;
  66         version = nf_call(id);
  67
  68         id = nf_get_id("NF_NAME");
  69         if (!id)
  70                 return;
  71         nf_call(id, buf, 256);
  72         buf[255] = 0;
  73
  74         pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
  75                 version & 0xffff);
  76
  77         mach_power_off = nf_poweroff;
  78 }