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

2
 * arch/sh/lib/io.c - SH32 optimized I/O routines

3
 *

4
 * Copyright (C) 2000  Stuart Menefy

5
 * Copyright (C) 2005  Paul Mundt

6
 *

7
 * Provide real functions which expand to whatever the header file defined.

8
 * Also definitions of machine independent IO functions.

9
 *

10
 * This file is subject to the terms and conditions of the GNU General Public

11
 * License.  See the file "COPYING" in the main directory of this archive

12
 * for more details.

13
 */

14
#include <linux/module.h>

15
#include <linux/io.h>

16


17
void __raw_readsl(const void __iomem *addr, void *datap, int len)

18
{

19
	u32 *data;

20


21
	for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)

22
		*data++ = __raw_readl(addr);

23


24
	if (likely(len >= (0x20 >> 2))) {

25
		int tmp2, tmp3, tmp4, tmp5, tmp6;

26


27
		__asm__ __volatile__(

28
			"1:			\n\t"

29
			"mov.l	@%7, r0		\n\t"

30
			"mov.l	@%7, %2		\n\t"

31
#ifdef CONFIG_CPU_SH4

32
			"movca.l r0, @%0	\n\t"

33
#else

34
			"mov.l	r0, @%0		\n\t"

35
#endif

36
			"mov.l	@%7, %3		\n\t"

37
			"mov.l	@%7, %4		\n\t"

38
			"mov.l	@%7, %5		\n\t"

39
			"mov.l	@%7, %6		\n\t"

40
			"mov.l	@%7, r7		\n\t"

41
			"mov.l	@%7, r0		\n\t"

42
			"mov.l	%2, @(0x04,%0)	\n\t"

43
			"mov	#0x20>>2, %2	\n\t"

44
			"mov.l	%3, @(0x08,%0)	\n\t"

45
			"sub	%2, %1		\n\t"

46
			"mov.l	%4, @(0x0c,%0)	\n\t"

47
			"cmp/hi	%1, %2		! T if 32 > len	\n\t"

48
			"mov.l	%5, @(0x10,%0)	\n\t"

49
			"mov.l	%6, @(0x14,%0)	\n\t"

50
			"mov.l	r7, @(0x18,%0)	\n\t"

51
			"mov.l	r0, @(0x1c,%0)	\n\t"

52
			"bf.s	1b		\n\t"

53
			" add	#0x20, %0	\n\t"

54
			: "=&r" (data), "=&r" (len),

55
			  "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),

56
			  "=&r" (tmp5), "=&r" (tmp6)

57
			: "r"(addr), "0" (data), "1" (len)

58
			: "r0", "r7", "t", "memory");

59
	}

60


61
	for (; len != 0; len--)

62
		*data++ = __raw_readl(addr);

63
}

64
EXPORT_SYMBOL(__raw_readsl);

65


66
void __raw_writesl(void __iomem *addr, const void *data, int len)

67
{

68
	if (likely(len != 0)) {

69
		int tmp1;

70


71
		__asm__ __volatile__ (

72
			"1:				\n\t"

73
			"mov.l	@%0+, %1	\n\t"

74
			"dt		%3		\n\t"

75
			"bf.s		1b		\n\t"

76
			" mov.l	%1, @%4		\n\t"

77
			: "=&r" (data), "=&r" (tmp1)

78
			: "0" (data), "r" (len), "r"(addr)

79
			: "t", "memory");

80
	}

81
}

82
EXPORT_SYMBOL(__raw_writesl);

83


84