cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

init_32.c (1694B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * init.c:  Initialize internal variables used by the PROM
      4 *          library functions.
      5 *
      6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
      7 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
      8 */
      9
     10#include <linux/kernel.h>
     11#include <linux/init.h>
     12#include <linux/module.h>
     13
     14#include <asm/openprom.h>
     15#include <asm/oplib.h>
     16
     17struct linux_romvec *romvec;
     18EXPORT_SYMBOL(romvec);
     19
     20enum prom_major_version prom_vers;
     21unsigned int prom_rev, prom_prev;
     22
     23/* The root node of the prom device tree. */
     24phandle prom_root_node;
     25EXPORT_SYMBOL(prom_root_node);
     26
     27/* Pointer to the device tree operations structure. */
     28struct linux_nodeops *prom_nodeops;
     29
     30/* You must call prom_init() before you attempt to use any of the
     31 * routines in the prom library.
     32 * It gets passed the pointer to the PROM vector.
     33 */
     34
     35void __init prom_init(struct linux_romvec *rp)
     36{
     37	romvec = rp;
     38
     39	switch(romvec->pv_romvers) {
     40	case 0:
     41		prom_vers = PROM_V0;
     42		break;
     43	case 2:
     44		prom_vers = PROM_V2;
     45		break;
     46	case 3:
     47		prom_vers = PROM_V3;
     48		break;
     49	default:
     50		prom_printf("PROMLIB: Bad PROM version %d\n",
     51			    romvec->pv_romvers);
     52		prom_halt();
     53		break;
     54	}
     55
     56	prom_rev = romvec->pv_plugin_revision;
     57	prom_prev = romvec->pv_printrev;
     58	prom_nodeops = romvec->pv_nodeops;
     59
     60	prom_root_node = prom_getsibling(0);
     61	if ((prom_root_node == 0) || ((s32)prom_root_node == -1))
     62		prom_halt();
     63
     64	if((((unsigned long) prom_nodeops) == 0) || 
     65	   (((unsigned long) prom_nodeops) == -1))
     66		prom_halt();
     67
     68	prom_meminit();
     69
     70	prom_ranges_init();
     71
     72	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
     73	       romvec->pv_romvers, prom_rev);
     74
     75	/* Initialization successful. */
     76}