80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
|
/*
|
||
|
|
* init.c: Initialize internal variables used by the PROM
|
||
|
|
* library functions.
|
||
|
|
*
|
||
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
|
||
|
|
#include <asm/openprom.h>
|
||
|
|
#include <asm/oplib.h>
|
||
|
|
|
||
|
|
struct linux_romvec *romvec;
|
||
|
|
enum prom_major_version prom_vers;
|
||
|
|
unsigned int prom_rev, prom_prev;
|
||
|
|
|
||
|
|
/* The root node of the prom device tree. */
|
||
|
|
int 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 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)
|
||
|
|
{
|
||
|
|
romvec = rp;
|
||
|
|
#ifndef CONFIG_SUN3
|
||
|
|
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 4:
|
||
|
|
prom_vers = PROM_P1275;
|
||
|
|
prom_printf("PROMLIB: Sun IEEE Prom not supported yet\n");
|
||
|
|
prom_halt();
|
||
|
|
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();
|
||
|
|
|
||
|
|
prom_meminit();
|
||
|
|
|
||
|
|
prom_ranges_init();
|
||
|
|
#endif
|
||
|
|
// printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
|
||
|
|
// romvec->pv_romvers, prom_rev);
|
||
|
|
|
||
|
|
/* Initialization successful. */
|
||
|
|
return;
|
||
|
|
}
|