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