forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
2.6 KiB
128 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* misc.c: Miscellaneous prom functions that don't belong |
|
* anywhere else. |
|
* |
|
* Copyright (C) 1995 David S. Miller ([email protected]) |
|
*/ |
|
|
|
#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> |
|
|
|
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) |
|
{ |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&prom_lock, flags); |
|
(*(romvec->pv_abort))(); |
|
restore_current(); |
|
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 __noreturn |
|
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; |
|
}
|
|
|