Commit | Line | Data |
---|---|---|
88278ca2 | 1 | /* |
1da177e4 LT |
2 | * init.c: Initialize internal variables used by the PROM |
3 | * library functions. | |
4 | * | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/init.h> | |
6943f3da | 11 | #include <linux/module.h> |
1da177e4 LT |
12 | |
13 | #include <asm/openprom.h> | |
14 | #include <asm/oplib.h> | |
1da177e4 LT |
15 | |
16 | struct linux_romvec *romvec; | |
6943f3da SR |
17 | EXPORT_SYMBOL(romvec); |
18 | ||
1da177e4 LT |
19 | enum prom_major_version prom_vers; |
20 | unsigned int prom_rev, prom_prev; | |
1da177e4 LT |
21 | |
22 | /* The root node of the prom device tree. */ | |
8d125562 | 23 | phandle prom_root_node; |
6943f3da | 24 | EXPORT_SYMBOL(prom_root_node); |
1da177e4 | 25 | |
1da177e4 LT |
26 | /* Pointer to the device tree operations structure. */ |
27 | struct linux_nodeops *prom_nodeops; | |
28 | ||
29 | /* You must call prom_init() before you attempt to use any of the | |
e393d1bd GU |
30 | * routines in the prom library. |
31 | * It gets passed the pointer to the PROM vector. | |
1da177e4 LT |
32 | */ |
33 | ||
1da177e4 LT |
34 | void __init prom_init(struct linux_romvec *rp) |
35 | { | |
1da177e4 LT |
36 | romvec = rp; |
37 | ||
38 | switch(romvec->pv_romvers) { | |
39 | case 0: | |
40 | prom_vers = PROM_V0; | |
41 | break; | |
42 | case 2: | |
43 | prom_vers = PROM_V2; | |
44 | break; | |
45 | case 3: | |
46 | prom_vers = PROM_V3; | |
47 | break; | |
1da177e4 LT |
48 | default: |
49 | prom_printf("PROMLIB: Bad PROM version %d\n", | |
50 | romvec->pv_romvers); | |
51 | prom_halt(); | |
52 | break; | |
6cb79b3f | 53 | } |
1da177e4 LT |
54 | |
55 | prom_rev = romvec->pv_plugin_revision; | |
56 | prom_prev = romvec->pv_printrev; | |
57 | prom_nodeops = romvec->pv_nodeops; | |
58 | ||
59 | prom_root_node = prom_getsibling(0); | |
4a3a2552 | 60 | if ((prom_root_node == 0) || ((s32)prom_root_node == -1)) |
1da177e4 LT |
61 | prom_halt(); |
62 | ||
63 | if((((unsigned long) prom_nodeops) == 0) || | |
64 | (((unsigned long) prom_nodeops) == -1)) | |
65 | prom_halt(); | |
66 | ||
1da177e4 LT |
67 | prom_meminit(); |
68 | ||
69 | prom_ranges_init(); | |
70 | ||
1da177e4 LT |
71 | printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n", |
72 | romvec->pv_romvers, prom_rev); | |
1da177e4 LT |
73 | |
74 | /* Initialization successful. */ | |
1da177e4 | 75 | } |