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/* $Id: init.c,v 1.7 1997/03/24 17:43:59 jj 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 <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_ranges_init(void);
extern void prom_cif_init(void *, void *);
__initfunc(void prom_init(void *cif_handler, void *cif_stack))
{
char buffer[80];
int node;
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("/chosen");
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) || buffer[5] != '.' || buffer[7] != '.') {
prom_printf ("Strange OBP version `%s'.\n", buffer);
prom_halt ();
}
/* Version field is expected to be 'OBP x.y.z date...' */
prom_rev = buffer[6] - '0';
prom_prev = ((buffer[4] - '0') << 16) |
((buffer[6] - '0') << 8) |
(buffer[8] - '0');
printk ("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + 4);
prom_meminit();
prom_ranges_init();
/* Initialization successful. */
}
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