667bc389c7
The idea of this thing is we could save/restore the firmware's palette when breaking in and out of the firmware prompt. Only one driver implemented this (atyfb) and it's value is questionable. If you're just debugging you don't really care that the characters end up being purple or whatever. And we can provide better debugging and firmware command facilities with minimal in-kernel console I/O drivers. Signed-off-by: David S. Miller <davem@davemloft.net>
132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/* $Id: misc.c,v 1.18 2000/08/26 02:38:03 anton Exp $
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* misc.c: Miscellaneous prom functions that don't belong
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* anywhere else.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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#include <asm/auxio.h>
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#include <asm/system.h>
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extern void restore_current(void);
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DEFINE_SPINLOCK(prom_lock);
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/* Reset and reboot the machine with the command 'bcommand'. */
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void
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prom_reboot(char *bcommand)
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{
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unsigned long flags;
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spin_lock_irqsave(&prom_lock, flags);
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(*(romvec->pv_reboot))(bcommand);
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/* Never get here. */
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restore_current();
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spin_unlock_irqrestore(&prom_lock, flags);
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}
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/* Forth evaluate the expression contained in 'fstring'. */
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void
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prom_feval(char *fstring)
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{
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unsigned long flags;
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if(!fstring || fstring[0] == 0)
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return;
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spin_lock_irqsave(&prom_lock, flags);
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if(prom_vers == PROM_V0)
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(*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring);
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else
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(*(romvec->pv_fortheval.v2_eval))(fstring);
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restore_current();
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spin_unlock_irqrestore(&prom_lock, flags);
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}
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/* Drop into the prom, with the chance to continue with the 'go'
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* prom command.
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*/
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void
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prom_cmdline(void)
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{
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extern void install_obp_ticker(void);
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extern void install_linux_ticker(void);
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unsigned long flags;
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spin_lock_irqsave(&prom_lock, flags);
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install_obp_ticker();
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(*(romvec->pv_abort))();
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restore_current();
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install_linux_ticker();
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spin_unlock_irqrestore(&prom_lock, flags);
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#ifdef CONFIG_SUN_AUXIO
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set_auxio(AUXIO_LED, 0);
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#endif
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}
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/* Drop into the prom, but completely terminate the program.
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* No chance of continuing.
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*/
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void
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prom_halt(void)
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{
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unsigned long flags;
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again:
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spin_lock_irqsave(&prom_lock, flags);
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(*(romvec->pv_halt))();
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/* Never get here. */
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restore_current();
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spin_unlock_irqrestore(&prom_lock, flags);
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goto again; /* PROM is out to get me -DaveM */
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}
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typedef void (*sfunc_t)(void);
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/* Set prom sync handler to call function 'funcp'. */
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void
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prom_setsync(sfunc_t funcp)
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{
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if(!funcp) return;
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*romvec->pv_synchook = funcp;
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}
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/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
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* format type. 'num_bytes' is the number of bytes that your idbuf
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* has space for. Returns 0xff on error.
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*/
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unsigned char
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prom_get_idprom(char *idbuf, int num_bytes)
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{
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int len;
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len = prom_getproplen(prom_root_node, "idprom");
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if((len>num_bytes) || (len==-1)) return 0xff;
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if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
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return idbuf[0];
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return 0xff;
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}
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/* Get the major prom version number. */
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int
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prom_version(void)
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{
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return romvec->pv_romvers;
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}
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/* Get the prom plugin-revision. */
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int
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prom_getrev(void)
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{
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return prom_rev;
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}
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/* Get the prom firmware print revision. */
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int
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prom_getprev(void)
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{
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return prom_prev;
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}
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