blob: 545d8bb79b65245984ed36c7963bd3c97768a2f5 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* 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/sched.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/irqflags.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 */
} 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;
local_save_flags(flags);
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);
local_irq_restore(flags);
}
void prom_cif_init(void *cif_handler, void *cif_stack)
{
p1275buf.prom_cif_handler = (void (*)(long *))cif_handler;
}
|
