57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/*
|
|
* p1275.c: Sun IEEE 1275 PROM low level interface routines
|
|
*
|
|
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/string.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/openprom.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/spitfire.h>
|
|
#include <asm/pstate.h>
|
|
#include <asm/ldc.h>
|
|
|
|
struct {
|
|
long prom_callback; /* 0x00 */
|
|
void (*prom_cif_handler)(long *); /* 0x08 */
|
|
unsigned long prom_cif_stack; /* 0x10 */
|
|
} p1275buf;
|
|
|
|
extern void prom_world(int);
|
|
|
|
extern void prom_cif_direct(unsigned long *args);
|
|
extern void prom_cif_callback(void);
|
|
|
|
/*
|
|
* This provides SMP safety on the p1275buf.
|
|
*/
|
|
DEFINE_RAW_SPINLOCK(prom_entry_lock);
|
|
|
|
void p1275_cmd_direct(unsigned long *args)
|
|
{
|
|
unsigned long flags;
|
|
|
|
raw_local_save_flags(flags);
|
|
raw_local_irq_restore((unsigned long)PIL_NMI);
|
|
raw_spin_lock(&prom_entry_lock);
|
|
|
|
prom_world(1);
|
|
prom_cif_direct(args);
|
|
prom_world(0);
|
|
|
|
raw_spin_unlock(&prom_entry_lock);
|
|
raw_local_irq_restore(flags);
|
|
}
|
|
|
|
void prom_cif_init(void *cif_handler, void *cif_stack)
|
|
{
|
|
p1275buf.prom_cif_handler = (void (*)(long *))cif_handler;
|
|
p1275buf.prom_cif_stack = (unsigned long)cif_stack;
|
|
}
|