?? init.c
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/* $Id: init.c,v 1.9 1996/12/18 06:46:55 tridge Exp $ * init.c: Initialize internal variables used by the PROM * library functions. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) */#include <linux/config.h>#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){#if CONFIG_AP1000 extern struct linux_romvec *ap_prom_init(void); rp = ap_prom_init();#endif 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; case 42: /* why not :-) */ prom_vers = PROM_AP1000; 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;}
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