Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
88278ca2 | 2 | /* |
1da177e4 LT |
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 | ||
1da177e4 LT |
10 | #include <linux/kernel.h> |
11 | #include <linux/init.h> | |
6943f3da | 12 | #include <linux/module.h> |
1da177e4 LT |
13 | |
14 | #include <asm/openprom.h> | |
15 | #include <asm/oplib.h> | |
1da177e4 LT |
16 | |
17 | struct linux_romvec *romvec; | |
6943f3da SR |
18 | EXPORT_SYMBOL(romvec); |
19 | ||
1da177e4 LT |
20 | enum prom_major_version prom_vers; |
21 | unsigned int prom_rev, prom_prev; | |
1da177e4 LT |
22 | |
23 | /* The root node of the prom device tree. */ | |
8d125562 | 24 | phandle prom_root_node; |
6943f3da | 25 | EXPORT_SYMBOL(prom_root_node); |
1da177e4 | 26 | |
1da177e4 LT |
27 | /* Pointer to the device tree operations structure. */ |
28 | struct linux_nodeops *prom_nodeops; | |
29 | ||
30 | /* You must call prom_init() before you attempt to use any of the | |
e393d1bd GU |
31 | * routines in the prom library. |
32 | * It gets passed the pointer to the PROM vector. | |
1da177e4 LT |
33 | */ |
34 | ||
1da177e4 LT |
35 | void __init prom_init(struct linux_romvec *rp) |
36 | { | |
1da177e4 LT |
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; | |
1da177e4 LT |
49 | default: |
50 | prom_printf("PROMLIB: Bad PROM version %d\n", | |
51 | romvec->pv_romvers); | |
52 | prom_halt(); | |
53 | break; | |
6cb79b3f | 54 | } |
1da177e4 LT |
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); | |
4a3a2552 | 61 | if ((prom_root_node == 0) || ((s32)prom_root_node == -1)) |
1da177e4 LT |
62 | prom_halt(); |
63 | ||
64 | if((((unsigned long) prom_nodeops) == 0) || | |
65 | (((unsigned long) prom_nodeops) == -1)) | |
66 | prom_halt(); | |
67 | ||
1da177e4 LT |
68 | prom_meminit(); |
69 | ||
70 | prom_ranges_init(); | |
71 | ||
1da177e4 LT |
72 | printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n", |
73 | romvec->pv_romvers, prom_rev); | |
1da177e4 LT |
74 | |
75 | /* Initialization successful. */ | |
1da177e4 | 76 | } |