aboutsummaryrefslogtreecommitdiff
path: root/arch/m68k/lib/semaphore.S
blob: 0215624c16027e918aef70055c6dcda7c46861ef (plain)
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
/*
 *  linux/arch/m68k/lib/semaphore.S
 *
 *  Copyright (C) 1996  Linus Torvalds
 *
 *  m68k version by Andreas Schwab
 */

#include <linux/linkage.h>
#include <asm/semaphore.h>

/*
 * The semaphore operations have a special calling sequence that
 * allow us to do a simpler in-line version of them. These routines
 * need to convert that sequence back into the C sequence when
 * there is contention on the semaphore.
 */
ENTRY(__down_failed)
	moveml %a0/%d0/%d1,-(%sp)
	movel %a1,-(%sp)
	jbsr __down
	movel (%sp)+,%a1
	moveml (%sp)+,%a0/%d0/%d1
	rts

ENTRY(__down_failed_interruptible)
	movel %a0,-(%sp)
	movel %d1,-(%sp)
	movel %a1,-(%sp)
	jbsr __down_interruptible
	movel (%sp)+,%a1
	movel (%sp)+,%d1
	movel (%sp)+,%a0
	rts

ENTRY(__down_failed_trylock)
	movel %a0,-(%sp)
	movel %d1,-(%sp)
	movel %a1,-(%sp)
	jbsr __down_trylock
	movel (%sp)+,%a1
	movel (%sp)+,%d1
	movel (%sp)+,%a0
	rts

ENTRY(__up_wakeup)
	moveml %a0/%d0/%d1,-(%sp)
	movel %a1,-(%sp)
	jbsr __up
	movel (%sp)+,%a1
	moveml (%sp)+,%a0/%d0/%d1
	rts