| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: misc.c,v 1.18 2000/08/26 02:38:03 anton Exp $ |
| 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 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 48 | /* We want to do this more nicely some day. */ |
| 49 | extern void (*prom_palette)(int); |
| 50 | |
| 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 | |
| 61 | if(!serial_console && prom_palette) |
| 62 | prom_palette (1); |
| 63 | spin_lock_irqsave(&prom_lock, flags); |
| 64 | install_obp_ticker(); |
| 65 | (*(romvec->pv_abort))(); |
| 66 | restore_current(); |
| 67 | install_linux_ticker(); |
| 68 | spin_unlock_irqrestore(&prom_lock, flags); |
| 69 | #ifdef CONFIG_SUN_AUXIO |
| 70 | set_auxio(AUXIO_LED, 0); |
| 71 | #endif |
| 72 | if(!serial_console && prom_palette) |
| 73 | prom_palette (0); |
| 74 | } |
| 75 | |
| 76 | /* Drop into the prom, but completely terminate the program. |
| 77 | * No chance of continuing. |
| 78 | */ |
| 79 | void |
| 80 | prom_halt(void) |
| 81 | { |
| 82 | unsigned long flags; |
| 83 | again: |
| 84 | spin_lock_irqsave(&prom_lock, flags); |
| 85 | (*(romvec->pv_halt))(); |
| 86 | /* Never get here. */ |
| 87 | restore_current(); |
| 88 | spin_unlock_irqrestore(&prom_lock, flags); |
| 89 | goto again; /* PROM is out to get me -DaveM */ |
| 90 | } |
| 91 | |
| 92 | typedef void (*sfunc_t)(void); |
| 93 | |
| 94 | /* Set prom sync handler to call function 'funcp'. */ |
| 95 | void |
| 96 | prom_setsync(sfunc_t funcp) |
| 97 | { |
| 98 | if(!funcp) return; |
| 99 | *romvec->pv_synchook = funcp; |
| 100 | } |
| 101 | |
| 102 | /* Get the idprom and stuff it into buffer 'idbuf'. Returns the |
| 103 | * format type. 'num_bytes' is the number of bytes that your idbuf |
| 104 | * has space for. Returns 0xff on error. |
| 105 | */ |
| 106 | unsigned char |
| 107 | prom_get_idprom(char *idbuf, int num_bytes) |
| 108 | { |
| 109 | int len; |
| 110 | |
| 111 | len = prom_getproplen(prom_root_node, "idprom"); |
| 112 | if((len>num_bytes) || (len==-1)) return 0xff; |
| 113 | if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes)) |
| 114 | return idbuf[0]; |
| 115 | |
| 116 | return 0xff; |
| 117 | } |
| 118 | |
| 119 | /* Get the major prom version number. */ |
| 120 | int |
| 121 | prom_version(void) |
| 122 | { |
| 123 | return romvec->pv_romvers; |
| 124 | } |
| 125 | |
| 126 | /* Get the prom plugin-revision. */ |
| 127 | int |
| 128 | prom_getrev(void) |
| 129 | { |
| 130 | return prom_rev; |
| 131 | } |
| 132 | |
| 133 | /* Get the prom firmware print revision. */ |
| 134 | int |
| 135 | prom_getprev(void) |
| 136 | { |
| 137 | return prom_prev; |
| 138 | } |