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c73fcc846c
The current scheme works on static interpretation of text names, which
is wrong.
The output-device setting, for example, must be resolved via an alias
or similar to a full path name to the console device.
Paths also contain an optional set of 'options', which starts with a
colon at the end of the path. The option area is used to specify
which of two serial ports ('a' or 'b') the path refers to when a
device node drives multiple ports. 'a' is assumed if the option
specification is missing.
This was caught by the UltraSPARC-T1 simulator. The 'output-device'
property was set to 'ttya' and we didn't pick upon the fact that this
is an OBP alias set to '/virtual-devices/console'. Instead we saw it
as the first serial console device, instead of the hypervisor console.
The infrastructure is now there to take advantage of this to resolve
the console correctly even in multi-head situations in fbcon too.
Thanks to Greg Onufer for the bug report.
Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
2.9 KiB
C
139 lines
2.9 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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/* We want to do this more nicely some day. */
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extern void (*prom_palette)(int);
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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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if (prom_palette)
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prom_palette (1);
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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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if (prom_palette)
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prom_palette (0);
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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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