Commit | Line | Data |
---|---|---|
88278ca2 | 1 | /* |
1da177e4 LT |
2 | * misc.c: Miscellaneous prom functions that don't belong |
3 | * anywhere else. | |
4 | * | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #include <linux/types.h> |
9 | #include <linux/kernel.h> | |
10 | #include <linux/sched.h> | |
6943f3da SR |
11 | #include <linux/module.h> |
12 | ||
1da177e4 LT |
13 | #include <asm/openprom.h> |
14 | #include <asm/oplib.h> | |
15 | #include <asm/auxio.h> | |
1da177e4 LT |
16 | |
17 | extern void restore_current(void); | |
18 | ||
19 | DEFINE_SPINLOCK(prom_lock); | |
20 | ||
21 | /* Reset and reboot the machine with the command 'bcommand'. */ | |
22 | void | |
23 | prom_reboot(char *bcommand) | |
24 | { | |
25 | unsigned long flags; | |
26 | spin_lock_irqsave(&prom_lock, flags); | |
27 | (*(romvec->pv_reboot))(bcommand); | |
28 | /* Never get here. */ | |
29 | restore_current(); | |
30 | spin_unlock_irqrestore(&prom_lock, flags); | |
31 | } | |
32 | ||
33 | /* Forth evaluate the expression contained in 'fstring'. */ | |
34 | void | |
35 | prom_feval(char *fstring) | |
36 | { | |
37 | unsigned long flags; | |
38 | if(!fstring || fstring[0] == 0) | |
39 | return; | |
40 | spin_lock_irqsave(&prom_lock, flags); | |
41 | if(prom_vers == PROM_V0) | |
42 | (*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring); | |
43 | else | |
44 | (*(romvec->pv_fortheval.v2_eval))(fstring); | |
45 | restore_current(); | |
46 | spin_unlock_irqrestore(&prom_lock, flags); | |
47 | } | |
6943f3da | 48 | EXPORT_SYMBOL(prom_feval); |
1da177e4 | 49 | |
1da177e4 LT |
50 | /* Drop into the prom, with the chance to continue with the 'go' |
51 | * prom command. | |
52 | */ | |
53 | void | |
54 | prom_cmdline(void) | |
55 | { | |
1da177e4 LT |
56 | unsigned long flags; |
57 | ||
1da177e4 | 58 | spin_lock_irqsave(&prom_lock, flags); |
1da177e4 LT |
59 | (*(romvec->pv_abort))(); |
60 | restore_current(); | |
1da177e4 | 61 | spin_unlock_irqrestore(&prom_lock, flags); |
1da177e4 | 62 | set_auxio(AUXIO_LED, 0); |
1da177e4 LT |
63 | } |
64 | ||
65 | /* Drop into the prom, but completely terminate the program. | |
66 | * No chance of continuing. | |
67 | */ | |
5f66dd35 | 68 | void __noreturn |
1da177e4 LT |
69 | prom_halt(void) |
70 | { | |
71 | unsigned long flags; | |
72 | again: | |
73 | spin_lock_irqsave(&prom_lock, flags); | |
74 | (*(romvec->pv_halt))(); | |
75 | /* Never get here. */ | |
76 | restore_current(); | |
77 | spin_unlock_irqrestore(&prom_lock, flags); | |
78 | goto again; /* PROM is out to get me -DaveM */ | |
79 | } | |
80 | ||
81 | typedef void (*sfunc_t)(void); | |
82 | ||
83 | /* Set prom sync handler to call function 'funcp'. */ | |
84 | void | |
85 | prom_setsync(sfunc_t funcp) | |
86 | { | |
87 | if(!funcp) return; | |
88 | *romvec->pv_synchook = funcp; | |
89 | } | |
90 | ||
91 | /* Get the idprom and stuff it into buffer 'idbuf'. Returns the | |
92 | * format type. 'num_bytes' is the number of bytes that your idbuf | |
93 | * has space for. Returns 0xff on error. | |
94 | */ | |
95 | unsigned char | |
96 | prom_get_idprom(char *idbuf, int num_bytes) | |
97 | { | |
98 | int len; | |
99 | ||
100 | len = prom_getproplen(prom_root_node, "idprom"); | |
101 | if((len>num_bytes) || (len==-1)) return 0xff; | |
102 | if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes)) | |
103 | return idbuf[0]; | |
104 | ||
105 | return 0xff; | |
106 | } | |
107 | ||
108 | /* Get the major prom version number. */ | |
109 | int | |
110 | prom_version(void) | |
111 | { | |
112 | return romvec->pv_romvers; | |
113 | } | |
114 | ||
115 | /* Get the prom plugin-revision. */ | |
116 | int | |
117 | prom_getrev(void) | |
118 | { | |
119 | return prom_rev; | |
120 | } | |
121 | ||
122 | /* Get the prom firmware print revision. */ | |
123 | int | |
124 | prom_getprev(void) | |
125 | { | |
126 | return prom_prev; | |
127 | } |