Adrian Bunk | 88278ca | 2008-05-19 16:53:02 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/kernel.h> |
| 10 | #include <linux/init.h> |
Sam Ravnborg | 6943f3d | 2009-01-08 16:58:05 -0800 | [diff] [blame] | 11 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | #include <asm/openprom.h> |
| 14 | #include <asm/oplib.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | struct linux_romvec *romvec; |
Sam Ravnborg | 6943f3d | 2009-01-08 16:58:05 -0800 | [diff] [blame] | 17 | EXPORT_SYMBOL(romvec); |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | enum prom_major_version prom_vers; |
| 20 | unsigned int prom_rev, prom_prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | /* The root node of the prom device tree. */ |
Andres Salomon | 8d12556 | 2010-10-08 14:18:11 -0700 | [diff] [blame] | 23 | phandle prom_root_node; |
Sam Ravnborg | 6943f3d | 2009-01-08 16:58:05 -0800 | [diff] [blame] | 24 | EXPORT_SYMBOL(prom_root_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Geert Uytterhoeven | e393d1b | 2012-06-20 06:58:06 +0000 | [diff] [blame] | 30 | * routines in the prom library. |
| 31 | * It gets passed the pointer to the PROM vector. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | */ |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | void __init prom_init(struct linux_romvec *rp) |
| 35 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | default: |
| 49 | prom_printf("PROMLIB: Bad PROM version %d\n", |
| 50 | romvec->pv_romvers); |
| 51 | prom_halt(); |
| 52 | break; |
Joe Perches | 6cb79b3 | 2011-06-03 14:45:23 +0000 | [diff] [blame] | 53 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Andres Salomon | 4a3a255 | 2010-11-11 22:42:06 -0800 | [diff] [blame] | 60 | if ((prom_root_node == 0) || ((s32)prom_root_node == -1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | prom_halt(); |
| 62 | |
| 63 | if((((unsigned long) prom_nodeops) == 0) || |
| 64 | (((unsigned long) prom_nodeops) == -1)) |
| 65 | prom_halt(); |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | prom_meminit(); |
| 68 | |
| 69 | prom_ranges_init(); |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n", |
| 72 | romvec->pv_romvers, prom_rev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | /* Initialization successful. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | } |