/* $Id: misc.c,v 1.18 2000/08/26 02:38:03 anton Exp $ * 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 <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); } /* We want to do this more nicely some day. */ extern void (*prom_palette)(int); /* 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; if (prom_palette) prom_palette (1); spin_lock_irqsave(&prom_lock, flags); install_obp_ticker(); (*(romvec->pv_abort))(); restore_current(); install_linux_ticker(); spin_unlock_irqrestore(&prom_lock, flags); #ifdef CONFIG_SUN_AUXIO set_auxio(AUXIO_LED, 0); #endif if (prom_palette) prom_palette (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; }