162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * init.c: Initialize internal variables used by the PROM 462306a36Sopenharmony_ci * library functions. 562306a36Sopenharmony_ci * 662306a36Sopenharmony_ci * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 762306a36Sopenharmony_ci * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 862306a36Sopenharmony_ci */ 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#include <linux/kernel.h> 1162306a36Sopenharmony_ci#include <linux/init.h> 1262306a36Sopenharmony_ci#include <linux/string.h> 1362306a36Sopenharmony_ci#include <linux/ctype.h> 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci#include <asm/openprom.h> 1662306a36Sopenharmony_ci#include <asm/oplib.h> 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci/* OBP version string. */ 1962306a36Sopenharmony_cichar prom_version[80]; 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci/* The root node of the prom device tree. */ 2262306a36Sopenharmony_ciint prom_stdout; 2362306a36Sopenharmony_ciphandle prom_chosen_node; 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci/* You must call prom_init() before you attempt to use any of the 2662306a36Sopenharmony_ci * routines in the prom library. 2762306a36Sopenharmony_ci * It gets passed the pointer to the PROM vector. 2862306a36Sopenharmony_ci */ 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ciextern void prom_cif_init(void *); 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_civoid __init prom_init(void *cif_handler) 3362306a36Sopenharmony_ci{ 3462306a36Sopenharmony_ci phandle node; 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ci prom_cif_init(cif_handler); 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ci prom_chosen_node = prom_finddevice(prom_chosen_path); 3962306a36Sopenharmony_ci if (!prom_chosen_node || (s32)prom_chosen_node == -1) 4062306a36Sopenharmony_ci prom_halt(); 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci prom_stdout = prom_getint(prom_chosen_node, "stdout"); 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci node = prom_finddevice("/openprom"); 4562306a36Sopenharmony_ci if (!node || (s32)node == -1) 4662306a36Sopenharmony_ci prom_halt(); 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ci prom_getstring(node, "version", prom_version, sizeof(prom_version)); 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ci prom_printf("\n"); 5162306a36Sopenharmony_ci} 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_civoid __init prom_init_report(void) 5462306a36Sopenharmony_ci{ 5562306a36Sopenharmony_ci printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version); 5662306a36Sopenharmony_ci printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible); 5762306a36Sopenharmony_ci} 58