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Commit | Line | Data |
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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> | |
16 | #include <asm/system.h> | |
17 | ||
18 | extern void restore_current(void); | |
19 | ||
20 | DEFINE_SPINLOCK(prom_lock); | |
21 | ||
22 | /* Reset and reboot the machine with the command 'bcommand'. */ | |
23 | void | |
24 | prom_reboot(char *bcommand) | |
25 | { | |
26 | unsigned long flags; | |
27 | spin_lock_irqsave(&prom_lock, flags); | |
28 | (*(romvec->pv_reboot))(bcommand); | |
29 | /* Never get here. */ | |
30 | restore_current(); | |
31 | spin_unlock_irqrestore(&prom_lock, flags); | |
32 | } | |
33 | ||
34 | /* Forth evaluate the expression contained in 'fstring'. */ | |
35 | void | |
36 | prom_feval(char *fstring) | |
37 | { | |
38 | unsigned long flags; | |
39 | if(!fstring || fstring[0] == 0) | |
40 | return; | |
41 | spin_lock_irqsave(&prom_lock, flags); | |
42 | if(prom_vers == PROM_V0) | |
43 | (*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring); | |
44 | else | |
45 | (*(romvec->pv_fortheval.v2_eval))(fstring); | |
46 | restore_current(); | |
47 | spin_unlock_irqrestore(&prom_lock, flags); | |
48 | } | |
6943f3da | 49 | EXPORT_SYMBOL(prom_feval); |
1da177e4 | 50 | |
1da177e4 LT |
51 | /* Drop into the prom, with the chance to continue with the 'go' |
52 | * prom command. | |
53 | */ | |
54 | void | |
55 | prom_cmdline(void) | |
56 | { | |
57 | extern void install_obp_ticker(void); | |
58 | extern void install_linux_ticker(void); | |
59 | unsigned long flags; | |
60 | ||
1da177e4 LT |
61 | spin_lock_irqsave(&prom_lock, flags); |
62 | install_obp_ticker(); | |
63 | (*(romvec->pv_abort))(); | |
64 | restore_current(); | |
65 | install_linux_ticker(); | |
66 | spin_unlock_irqrestore(&prom_lock, flags); | |
1da177e4 | 67 | set_auxio(AUXIO_LED, 0); |
1da177e4 LT |
68 | } |
69 | ||
70 | /* Drop into the prom, but completely terminate the program. | |
71 | * No chance of continuing. | |
72 | */ | |
73 | void | |
74 | prom_halt(void) | |
75 | { | |
76 | unsigned long flags; | |
77 | again: | |
78 | spin_lock_irqsave(&prom_lock, flags); | |
79 | (*(romvec->pv_halt))(); | |
80 | /* Never get here. */ | |
81 | restore_current(); | |
82 | spin_unlock_irqrestore(&prom_lock, flags); | |
83 | goto again; /* PROM is out to get me -DaveM */ | |
84 | } | |
85 | ||
86 | typedef void (*sfunc_t)(void); | |
87 | ||
88 | /* Set prom sync handler to call function 'funcp'. */ | |
89 | void | |
90 | prom_setsync(sfunc_t funcp) | |
91 | { | |
92 | if(!funcp) return; | |
93 | *romvec->pv_synchook = funcp; | |
94 | } | |
95 | ||
96 | /* Get the idprom and stuff it into buffer 'idbuf'. Returns the | |
97 | * format type. 'num_bytes' is the number of bytes that your idbuf | |
98 | * has space for. Returns 0xff on error. | |
99 | */ | |
100 | unsigned char | |
101 | prom_get_idprom(char *idbuf, int num_bytes) | |
102 | { | |
103 | int len; | |
104 | ||
105 | len = prom_getproplen(prom_root_node, "idprom"); | |
106 | if((len>num_bytes) || (len==-1)) return 0xff; | |
107 | if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes)) | |
108 | return idbuf[0]; | |
109 | ||
110 | return 0xff; | |
111 | } | |
112 | ||
113 | /* Get the major prom version number. */ | |
114 | int | |
115 | prom_version(void) | |
116 | { | |
117 | return romvec->pv_romvers; | |
118 | } | |
119 | ||
120 | /* Get the prom plugin-revision. */ | |
121 | int | |
122 | prom_getrev(void) | |
123 | { | |
124 | return prom_rev; | |
125 | } | |
126 | ||
127 | /* Get the prom firmware print revision. */ | |
128 | int | |
129 | prom_getprev(void) | |
130 | { | |
131 | return prom_prev; | |
132 | } |