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// SPDX-License-Identifier: GPL-2.0
/*
* 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 <linux/module.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
struct linux_romvec *romvec;
EXPORT_SYMBOL(romvec);
enum prom_major_version prom_vers;
unsigned int prom_rev, prom_prev;
/* The root node of the prom device tree. */
phandle prom_root_node;
EXPORT_SYMBOL(prom_root_node);
/* 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 gets passed the pointer to the PROM vector.
*/
void __init prom_init(struct linux_romvec *rp)
{
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;
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) || ((s32)prom_root_node == -1))
prom_halt();
if((((unsigned long) prom_nodeops) == 0) ||
(((unsigned long) prom_nodeops) == -1))
prom_halt();
prom_meminit();
prom_ranges_init();
printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
romvec->pv_romvers, prom_rev);
/* Initialization successful. */
}
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