| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | } |