102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/* $Id: init.c,v 1.10 1999/09/21 14:35:59 davem Exp $
|
|
* init.c: Initialize internal variables used by the PROM
|
|
* library functions.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ctype.h>
|
|
|
|
#include <asm/openprom.h>
|
|
#include <asm/oplib.h>
|
|
|
|
enum prom_major_version prom_vers;
|
|
unsigned int prom_rev, prom_prev;
|
|
|
|
/* The root node of the prom device tree. */
|
|
int prom_root_node;
|
|
int prom_stdin, prom_stdout;
|
|
int prom_chosen_node;
|
|
|
|
/* You must call prom_init() before you attempt to use any of the
|
|
* routines in the prom library. It returns 0 on success, 1 on
|
|
* failure. It gets passed the pointer to the PROM vector.
|
|
*/
|
|
|
|
extern void prom_meminit(void);
|
|
extern void prom_cif_init(void *, void *);
|
|
|
|
void __init prom_init(void *cif_handler, void *cif_stack)
|
|
{
|
|
char buffer[80], *p;
|
|
int ints[3];
|
|
int node;
|
|
int i = 0;
|
|
int bufadjust;
|
|
|
|
prom_vers = PROM_P1275;
|
|
|
|
prom_cif_init(cif_handler, cif_stack);
|
|
|
|
prom_root_node = prom_getsibling(0);
|
|
if((prom_root_node == 0) || (prom_root_node == -1))
|
|
prom_halt();
|
|
|
|
prom_chosen_node = prom_finddevice(prom_chosen_path);
|
|
if (!prom_chosen_node || prom_chosen_node == -1)
|
|
prom_halt();
|
|
|
|
prom_stdin = prom_getint (prom_chosen_node, "stdin");
|
|
prom_stdout = prom_getint (prom_chosen_node, "stdout");
|
|
|
|
node = prom_finddevice("/openprom");
|
|
if (!node || node == -1)
|
|
prom_halt();
|
|
|
|
prom_getstring (node, "version", buffer, sizeof (buffer));
|
|
|
|
prom_printf ("\n");
|
|
|
|
if (strncmp (buffer, "OBP ", 4))
|
|
goto strange_version;
|
|
|
|
/*
|
|
* Version field is expected to be 'OBP xx.yy.zz date...'
|
|
* However, Sun can't stick to this format very well, so
|
|
* we need to check for 'OBP xx.yy.zz date...' and adjust
|
|
* accordingly. -spot
|
|
*/
|
|
|
|
if (strncmp (buffer, "OBP ", 5))
|
|
bufadjust = 4;
|
|
else
|
|
bufadjust = 5;
|
|
|
|
p = buffer + bufadjust;
|
|
while (p && isdigit(*p) && i < 3) {
|
|
ints[i++] = simple_strtoul(p, NULL, 0);
|
|
if ((p = strchr(p, '.')) != NULL)
|
|
p++;
|
|
}
|
|
if (i != 3)
|
|
goto strange_version;
|
|
|
|
prom_rev = ints[1];
|
|
prom_prev = (ints[0] << 16) | (ints[1] << 8) | ints[2];
|
|
|
|
printk ("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + bufadjust);
|
|
|
|
prom_meminit();
|
|
|
|
/* Initialization successful. */
|
|
return;
|
|
|
|
strange_version:
|
|
prom_printf ("Strange OBP version `%s'.\n", buffer);
|
|
prom_halt ();
|
|
}
|