Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/lib/io-writesl.S
10817 views
1
/*

2
 *  linux/arch/arm/lib/io-writesl.S

3
 *

4
 *  Copyright (C) 1995-2000 Russell King

5
 *

6
 * This program is free software; you can redistribute it and/or modify

7
 * it under the terms of the GNU General Public License version 2 as

8
 * published by the Free Software Foundation.

9
 */

10
#include <linux/linkage.h>

11
#include <asm/assembler.h>

12


13
ENTRY(__raw_writesl)

14
		teq	r2, #0		@ do we have to check for the zero len?

15
		moveq	pc, lr

16
		ands	ip, r1, #3

17
		bne	3f

18


19
		subs	r2, r2, #4

20
		bmi	2f

21
		stmfd	sp!, {r4, lr}

22
1:		ldmia	r1!, {r3, r4, ip, lr}

23
		subs	r2, r2, #4

24
		str	r3, [r0, #0]

25
		str	r4, [r0, #0]

26
		str	ip, [r0, #0]

27
		str	lr, [r0, #0]

28
		bpl	1b

29
		ldmfd	sp!, {r4, lr}

30
2:		movs	r2, r2, lsl #31

31
		ldmcsia	r1!, {r3, ip}

32
		strcs	r3, [r0, #0]

33
		ldrne	r3, [r1, #0]

34
		strcs	ip, [r0, #0]

35
		strne	r3, [r0, #0]

36
		mov	pc, lr

37


38
3:		bic	r1, r1, #3

39
		ldr	r3, [r1], #4

40
		cmp	ip, #2

41
		blt	5f

42
		bgt	6f

43


44
4:		mov	ip, r3, pull #16

45
		ldr	r3, [r1], #4

46
		subs	r2, r2, #1

47
		orr	ip, ip, r3, push #16

48
		str	ip, [r0]

49
		bne	4b

50
		mov	pc, lr

51


52
5:		mov	ip, r3, pull #8

53
		ldr	r3, [r1], #4

54
		subs	r2, r2, #1

55
		orr	ip, ip, r3, push #24

56
		str	ip, [r0]

57
		bne	5b

58
		mov	pc, lr

59


60
6:		mov	ip, r3, pull #24

61
		ldr	r3, [r1], #4

62
		subs	r2, r2, #1

63
		orr	ip, ip, r3, push #8

64
		str	ip, [r0]

65
		bne	6b

66
		mov	pc, lr

67
ENDPROC(__raw_writesl)

68


69