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) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/init.h> 12 #include <linux/string.h> 13 #include <linux/ctype.h> 14 15 #include <asm/openprom.h> 16 #include <asm/oplib.h> 17 18 /* OBP version string. */ 19 char prom_version[80]; 20 21 /* The root node of the prom device tree. */ 22 int prom_stdout; 23 phandle prom_chosen_node; 24 25 /* You must call prom_init() before you attempt to use any of the 26 * routines in the prom library. 27 * It gets passed the pointer to the PROM vector. 28 */ 29 void __init prom_init(void *cif_handler) 30 { 31 phandle node; 32 33 prom_cif_init(cif_handler); 34 35 prom_chosen_node = prom_finddevice(prom_chosen_path); 36 if (!prom_chosen_node || (s32)prom_chosen_node == -1) 37 prom_halt(); 38 39 prom_stdout = prom_getint(prom_chosen_node, "stdout"); 40 41 node = prom_finddevice("/openprom"); 42 if (!node || (s32)node == -1) 43 prom_halt(); 44 45 prom_getstring(node, "version", prom_version, sizeof(prom_version)); 46 47 prom_printf("\n"); 48 } 49 50 void __init prom_init_report(void) 51 { 52 printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version); 53 printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible); 54 } 55