1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * init.c: Initialize internal variables used by the PROM 4*4882a593Smuzhiyun * library functions. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 7*4882a593Smuzhiyun * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/kernel.h> 11*4882a593Smuzhiyun #include <linux/init.h> 12*4882a593Smuzhiyun #include <linux/module.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <asm/openprom.h> 15*4882a593Smuzhiyun #include <asm/oplib.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun struct linux_romvec *romvec; 18*4882a593Smuzhiyun EXPORT_SYMBOL(romvec); 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun enum prom_major_version prom_vers; 21*4882a593Smuzhiyun unsigned int prom_rev, prom_prev; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* The root node of the prom device tree. */ 24*4882a593Smuzhiyun phandle prom_root_node; 25*4882a593Smuzhiyun EXPORT_SYMBOL(prom_root_node); 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* Pointer to the device tree operations structure. */ 28*4882a593Smuzhiyun struct linux_nodeops *prom_nodeops; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* You must call prom_init() before you attempt to use any of the 31*4882a593Smuzhiyun * routines in the prom library. 32*4882a593Smuzhiyun * It gets passed the pointer to the PROM vector. 33*4882a593Smuzhiyun */ 34*4882a593Smuzhiyun prom_init(struct linux_romvec * rp)35*4882a593Smuzhiyunvoid __init prom_init(struct linux_romvec *rp) 36*4882a593Smuzhiyun { 37*4882a593Smuzhiyun romvec = rp; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun switch(romvec->pv_romvers) { 40*4882a593Smuzhiyun case 0: 41*4882a593Smuzhiyun prom_vers = PROM_V0; 42*4882a593Smuzhiyun break; 43*4882a593Smuzhiyun case 2: 44*4882a593Smuzhiyun prom_vers = PROM_V2; 45*4882a593Smuzhiyun break; 46*4882a593Smuzhiyun case 3: 47*4882a593Smuzhiyun prom_vers = PROM_V3; 48*4882a593Smuzhiyun break; 49*4882a593Smuzhiyun default: 50*4882a593Smuzhiyun prom_printf("PROMLIB: Bad PROM version %d\n", 51*4882a593Smuzhiyun romvec->pv_romvers); 52*4882a593Smuzhiyun prom_halt(); 53*4882a593Smuzhiyun break; 54*4882a593Smuzhiyun } 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun prom_rev = romvec->pv_plugin_revision; 57*4882a593Smuzhiyun prom_prev = romvec->pv_printrev; 58*4882a593Smuzhiyun prom_nodeops = romvec->pv_nodeops; 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun prom_root_node = prom_getsibling(0); 61*4882a593Smuzhiyun if ((prom_root_node == 0) || ((s32)prom_root_node == -1)) 62*4882a593Smuzhiyun prom_halt(); 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun if((((unsigned long) prom_nodeops) == 0) || 65*4882a593Smuzhiyun (((unsigned long) prom_nodeops) == -1)) 66*4882a593Smuzhiyun prom_halt(); 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun prom_meminit(); 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun prom_ranges_init(); 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n", 73*4882a593Smuzhiyun romvec->pv_romvers, prom_rev); 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun /* Initialization successful. */ 76*4882a593Smuzhiyun } 77