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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | /* * 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> #include <asm/system.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) { extern void install_obp_ticker(void); extern void install_linux_ticker(void); unsigned long flags; spin_lock_irqsave(&prom_lock, flags); install_obp_ticker(); (*(romvec->pv_abort))(); restore_current(); install_linux_ticker(); 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 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; } |