misc.c
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上传日期:2013-04-10
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- /* $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/config.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <asm/openprom.h>
- #include <asm/oplib.h>
- #include <asm/auxio.h>
- extern void restore_current(void);
- spinlock_t prom_lock = SPIN_LOCK_UNLOCKED;
- /* 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. */
- #ifdef CONFIG_SUN_CONSOLE
- extern void (*prom_palette)(int);
- extern int serial_console;
- #endif
- /* Drop into the prom, with the chance to continue with the 'go'
- * prom command.
- */
- void
- prom_cmdline(void)
- {
- extern void kernel_enter_debugger(void);
- extern void install_obp_ticker(void);
- extern void install_linux_ticker(void);
- unsigned long flags;
-
- kernel_enter_debugger();
- #ifdef CONFIG_SUN_CONSOLE
- if(!serial_console && prom_palette)
- prom_palette (1);
- #endif
- install_obp_ticker();
- spin_lock_irqsave(&prom_lock, flags);
- (*(romvec->pv_abort))();
- restore_current();
- spin_unlock_irqrestore(&prom_lock, flags);
- install_linux_ticker();
- #ifdef CONFIG_SUN_AUXIO
- TURN_ON_LED;
- #endif
- #ifdef CONFIG_SUN_CONSOLE
- if(!serial_console && prom_palette)
- prom_palette (0);
- #endif
- }
- /* 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;
- }