Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm/lib/io-writesw-armv3.S
26292 views
1
/* SPDX-License-Identifier: GPL-2.0-only */

2
/*

3
 *  linux/arch/arm/lib/io-writesw-armv3.S

4
 *

5
 *  Copyright (C) 1995-2000 Russell King

6
 */

7
#include <linux/linkage.h>

8
#include <asm/assembler.h>

9


10
.Loutsw_bad_alignment:

11
		adr	r0, .Loutsw_bad_align_msg

12
		mov	r2, lr

13
		b	panic

14
.Loutsw_bad_align_msg:

15
		.asciz	"outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n"

16
		.align

17


18
.Loutsw_align:	tst	r1, #1

19
		bne	.Loutsw_bad_alignment

20


21
		add	r1, r1, #2

22


23
		ldr	r3, [r1, #-4]

24
		mov	r3, r3, lsr #16

25
		orr	r3, r3, r3, lsl #16

26
		str	r3, [r0]

27
		subs	r2, r2, #1

28
		reteq	lr

29


30
ENTRY(__raw_writesw)

31
		teq	r2, #0		@ do we have to check for the zero len?

32
		reteq	lr

33
		tst	r1, #3

34
		bne	.Loutsw_align

35


36
		stmfd	sp!, {r4, r5, r6, lr}

37


38
		subs	r2, r2, #8

39
		bmi	.Lno_outsw_8

40


41
.Loutsw_8_lp:	ldmia	r1!, {r3, r4, r5, r6}

42


43
		mov	ip, r3, lsl #16

44
		orr	ip, ip, ip, lsr #16

45
		str	ip, [r0]

46


47
		mov	ip, r3, lsr #16

48
		orr	ip, ip, ip, lsl #16

49
		str	ip, [r0]

50


51
		mov	ip, r4, lsl #16

52
		orr	ip, ip, ip, lsr #16

53
		str	ip, [r0]

54


55
		mov	ip, r4, lsr #16

56
		orr	ip, ip, ip, lsl #16

57
		str	ip, [r0]

58


59
		mov	ip, r5, lsl #16

60
		orr	ip, ip, ip, lsr #16

61
		str	ip, [r0]

62


63
		mov	ip, r5, lsr #16

64
		orr	ip, ip, ip, lsl #16

65
		str	ip, [r0]

66


67
		mov	ip, r6, lsl #16

68
		orr	ip, ip, ip, lsr #16

69
		str	ip, [r0]

70


71
		mov	ip, r6, lsr #16

72
		orr	ip, ip, ip, lsl #16

73
		str	ip, [r0]

74


75
		subs	r2, r2, #8

76
		bpl	.Loutsw_8_lp

77


78
		tst	r2, #7

79
		ldmfdeq	sp!, {r4, r5, r6, pc}

80


81
.Lno_outsw_8:	tst	r2, #4

82
		beq	.Lno_outsw_4

83


84
		ldmia	r1!, {r3, r4}

85


86
		mov	ip, r3, lsl #16

87
		orr	ip, ip, ip, lsr #16

88
		str	ip, [r0]

89


90
		mov	ip, r3, lsr #16

91
		orr	ip, ip, ip, lsl #16

92
		str	ip, [r0]

93


94
		mov	ip, r4, lsl #16

95
		orr	ip, ip, ip, lsr #16

96
		str	ip, [r0]

97


98
		mov	ip, r4, lsr #16

99
		orr	ip, ip, ip, lsl #16

100
		str	ip, [r0]

101


102
.Lno_outsw_4:	tst	r2, #2

103
		beq	.Lno_outsw_2

104


105
		ldr	r3, [r1], #4

106


107
		mov	ip, r3, lsl #16

108
		orr	ip, ip, ip, lsr #16

109
		str	ip, [r0]

110


111
		mov	ip, r3, lsr #16

112
		orr	ip, ip, ip, lsl #16

113
		str	ip, [r0]

114


115
.Lno_outsw_2:	tst	r2, #1

116


117
		ldrne	r3, [r1]

118


119
		movne	ip, r3, lsl #16

120
		orrne	ip, ip, ip, lsr #16

121
		strne	ip, [r0]

122


123
		ldmfd	sp!, {r4, r5, r6, pc}

124


125