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> | |
11 | #include <asm/openprom.h> | |
12 | #include <asm/oplib.h> | |
13 | #include <asm/auxio.h> | |
14 | #include <asm/system.h> | |
15 | ||
16 | extern void restore_current(void); | |
17 | ||
18 | DEFINE_SPINLOCK(prom_lock); | |
19 | ||
20 | /* Reset and reboot the machine with the command 'bcommand'. */ | |
21 | void | |
22 | prom_reboot(char *bcommand) | |
23 | { | |
24 | unsigned long flags; | |
25 | spin_lock_irqsave(&prom_lock, flags); | |
26 | (*(romvec->pv_reboot))(bcommand); | |
27 | /* Never get here. */ | |
28 | restore_current(); | |
29 | spin_unlock_irqrestore(&prom_lock, flags); | |
30 | } | |
31 | ||
32 | /* Forth evaluate the expression contained in 'fstring'. */ | |
33 | void | |
34 | prom_feval(char *fstring) | |
35 | { | |
36 | unsigned long flags; | |
37 | if(!fstring || fstring[0] == 0) | |
38 | return; | |
39 | spin_lock_irqsave(&prom_lock, flags); | |
40 | if(prom_vers == PROM_V0) | |
41 | (*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring); | |
42 | else | |
43 | (*(romvec->pv_fortheval.v2_eval))(fstring); | |
44 | restore_current(); | |
45 | spin_unlock_irqrestore(&prom_lock, flags); | |
46 | } | |
47 | ||
1da177e4 LT |
48 | /* Drop into the prom, with the chance to continue with the 'go' |
49 | * prom command. | |
50 | */ | |
51 | void | |
52 | prom_cmdline(void) | |
53 | { | |
54 | extern void install_obp_ticker(void); | |
55 | extern void install_linux_ticker(void); | |
56 | unsigned long flags; | |
57 | ||
1da177e4 LT |
58 | spin_lock_irqsave(&prom_lock, flags); |
59 | install_obp_ticker(); | |
60 | (*(romvec->pv_abort))(); | |
61 | restore_current(); | |
62 | install_linux_ticker(); | |
63 | spin_unlock_irqrestore(&prom_lock, flags); | |
64 | #ifdef CONFIG_SUN_AUXIO | |
65 | set_auxio(AUXIO_LED, 0); | |
66 | #endif | |
1da177e4 LT |
67 | } |
68 | ||
69 | /* Drop into the prom, but completely terminate the program. | |
70 | * No chance of continuing. | |
71 | */ | |
72 | void | |
73 | prom_halt(void) | |
74 | { | |
75 | unsigned long flags; | |
76 | again: | |
77 | spin_lock_irqsave(&prom_lock, flags); | |
78 | (*(romvec->pv_halt))(); | |
79 | /* Never get here. */ | |
80 | restore_current(); | |
81 | spin_unlock_irqrestore(&prom_lock, flags); | |
82 | goto again; /* PROM is out to get me -DaveM */ | |
83 | } | |
84 | ||
85 | typedef void (*sfunc_t)(void); | |
86 | ||
87 | /* Set prom sync handler to call function 'funcp'. */ | |
88 | void | |
89 | prom_setsync(sfunc_t funcp) | |
90 | { | |
91 | if(!funcp) return; | |
92 | *romvec->pv_synchook = funcp; | |
93 | } | |
94 | ||
95 | /* Get the idprom and stuff it into buffer 'idbuf'. Returns the | |
96 | * format type. 'num_bytes' is the number of bytes that your idbuf | |
97 | * has space for. Returns 0xff on error. | |
98 | */ | |
99 | unsigned char | |
100 | prom_get_idprom(char *idbuf, int num_bytes) | |
101 | { | |
102 | int len; | |
103 | ||
104 | len = prom_getproplen(prom_root_node, "idprom"); | |
105 | if((len>num_bytes) || (len==-1)) return 0xff; | |
106 | if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes)) | |
107 | return idbuf[0]; | |
108 | ||
109 | return 0xff; | |
110 | } | |
111 | ||
112 | /* Get the major prom version number. */ | |
113 | int | |
114 | prom_version(void) | |
115 | { | |
116 | return romvec->pv_romvers; | |
117 | } | |
118 | ||
119 | /* Get the prom plugin-revision. */ | |
120 | int | |
121 | prom_getrev(void) | |
122 | { | |
123 | return prom_rev; | |
124 | } | |
125 | ||
126 | /* Get the prom firmware print revision. */ | |
127 | int | |
128 | prom_getprev(void) | |
129 | { | |
130 | return prom_prev; | |
131 | } |