Linux Kernel  3.7.1
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init.c
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * PROM library initialisation code.
7  *
8  * Copyright (C) 1996 David S. Miller ([email protected])
9  */
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 
13 #include <asm/bootinfo.h>
14 #include <asm/sgialib.h>
15 #include <asm/smp-ops.h>
16 
17 #undef DEBUG_PROM_INIT
18 
19 /* Master romvec interface. */
23 
24 void __init prom_init(void)
25 {
27 
28  romvec = ROMVECTOR;
29 
31  _prom_argv = (LONG *) fw_arg1;
32  _prom_envp = (LONG *) fw_arg2;
33 
34  if (pb->magic != 0x53435241) {
35  printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n",
36  (unsigned long) pb->magic);
37  while(1)
38  ;
39  }
40 
43  printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n",
44  pb->ver, pb->rev);
45  prom_meminit();
46 
47 #ifdef DEBUG_PROM_INIT
48  pr_info("Press a key to reboot\n");
49  ArcRead(0, &c, 1, &cnt);
51 #endif
52 #ifdef CONFIG_SGI_IP27
53  {
54  extern struct plat_smp_ops ip27_smp_ops;
55 
56  register_smp_ops(&ip27_smp_ops);
57  }
58 #endif
59 }