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/* $Id: init.c,v 1.14 2000/01/29 01:09:12 anton Exp $
* init.c: Initialize internal variables used by the PROM
* library functions.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/sun4prom.h>
struct linux_romvec *romvec;
enum prom_major_version prom_vers;
unsigned int prom_rev, prom_prev;
linux_sun4_romvec *sun4_romvec;
/* The root node of the prom device tree. */
int prom_root_node;
int prom_stdin, prom_stdout;
/* Pointer to the device tree operations structure. */
struct linux_nodeops *prom_nodeops;
/* 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);
void __init prom_init(struct linux_romvec *rp)
{
#ifdef CONFIG_SUN4
extern struct linux_romvec *sun4_prom_init(void);
rp = sun4_prom_init();
#endif
romvec = rp;
switch(romvec->pv_romvers) {
case 0:
prom_vers = PROM_V0;
break;
case 2:
prom_vers = PROM_V2;
break;
case 3:
prom_vers = PROM_V3;
break;
case 40:
prom_vers = PROM_SUN4;
break;
default:
prom_printf("PROMLIB: Bad PROM version %d\n",
romvec->pv_romvers);
prom_halt();
break;
};
prom_rev = romvec->pv_plugin_revision;
prom_prev = romvec->pv_printrev;
prom_nodeops = romvec->pv_nodeops;
prom_root_node = prom_getsibling(0);
if((prom_root_node == 0) || (prom_root_node == -1))
prom_halt();
if((((unsigned long) prom_nodeops) == 0) ||
(((unsigned long) prom_nodeops) == -1))
prom_halt();
if(prom_vers == PROM_V2 || prom_vers == PROM_V3) {
prom_stdout = *romvec->pv_v2bootargs.fd_stdout;
prom_stdin = *romvec->pv_v2bootargs.fd_stdin;
}
prom_meminit();
prom_ranges_init();
#ifndef CONFIG_SUN4
/* SUN4 prints this in sun4_prom_init */
printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
romvec->pv_romvers, prom_rev);
#endif
/* Initialization successful. */
return;
}
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