aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/kernel/io.c
blob: 501fe03e3715770c484684f7b1fbecfb954d2010 (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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/*
 * linux/arch/sh/kernel/io.c
 *
 * Copyright (C) 2000  Stuart Menefy
 * Copyright (C) 2005  Paul Mundt
 *
 * Provide real functions which expand to whatever the header file defined.
 * Also definitions of machine independent IO functions.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/module.h>
#include <asm/machvec.h>
#include <asm/io.h>

/*
 * Copy data from IO memory space to "real" memory space.
 * This needs to be optimized.
 */
void memcpy_fromio(void *to, volatile void __iomem *from, unsigned long count)
{
	char *p = to;
        while (count) {
                count--;
                *p = readb((void __iomem *)from);
                p++;
                from++;
        }
}
EXPORT_SYMBOL(memcpy_fromio);

/*
 * Copy data from "real" memory space to IO memory space.
 * This needs to be optimized.
 */
void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count)
{
	const char *p = from;
        while (count) {
                count--;
                writeb(*p, (void __iomem *)to);
                p++;
                to++;
        }
}
EXPORT_SYMBOL(memcpy_toio);

/*
 * "memset" on IO memory space.
 * This needs to be optimized.
 */
void memset_io(volatile void __iomem *dst, int c, unsigned long count)
{
        while (count) {
                count--;
                writeb(c, (void __iomem *)dst);
                dst++;
        }
}
EXPORT_SYMBOL(memset_io);

void __raw_readsl(unsigned long addr, void *datap, int len)
{
	u32 *data;

	for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
		*data++ = ctrl_inl(addr);

	if (likely(len >= (0x20 >> 2))) {
		int tmp2, tmp3, tmp4, tmp5, tmp6;

		__asm__ __volatile__(
			"1:			\n\t"
			"mov.l	@%7, r0		\n\t"
			"mov.l	@%7, %2		\n\t"
#ifdef CONFIG_CPU_SH4
			"movca.l r0, @%0	\n\t"
#else
			"mov.l	r0, @%0		\n\t"
#endif
			"mov.l	@%7, %3		\n\t"
			"mov.l	@%7, %4		\n\t"
			"mov.l	@%7, %5		\n\t"
			"mov.l	@%7, %6		\n\t"
			"mov.l	@%7, r7		\n\t"
			"mov.l	@%7, r0		\n\t"
			"mov.l	%2, @(0x04,%0)	\n\t"
			"mov	#0x20>>2, %2	\n\t"
			"mov.l	%3, @(0x08,%0)	\n\t"
			"sub	%2, %1		\n\t"
			"mov.l	%4, @(0x0c,%0)	\n\t"
			"cmp/hi	%1, %2		! T if 32 > len	\n\t"
			"mov.l	%5, @(0x10,%0)	\n\t"
			"mov.l	%6, @(0x14,%0)	\n\t"
			"mov.l	r7, @(0x18,%0)	\n\t"
			"mov.l	r0, @(0x1c,%0)	\n\t"
			"bf.s	1b		\n\t"
			" add	#0x20, %0	\n\t"
			: "=&r" (data), "=&r" (len),
			  "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),
			  "=&r" (tmp5), "=&r" (tmp6)
			: "r"(addr), "0" (data), "1" (len)
			: "r0", "r7", "t", "memory");
	}

	for (; len != 0; len--)
		*data++ = ctrl_inl(addr);
}
EXPORT_SYMBOL(__raw_readsl);

void __raw_writesl(unsigned long addr, const void *data, int len)
{
	if (likely(len != 0)) {
		int tmp1;

		__asm__ __volatile__ (
			"1:				\n\t"
			"mov.l	@%0+, %1	\n\t"
			"dt		%3		\n\t"
			"bf.s		1b		\n\t"
			" mov.l	%1, @%4		\n\t"
			: "=&r" (data), "=&r" (tmp1)
			: "0" (data), "r" (len), "r"(addr)
			: "t", "memory");
	}
}
EXPORT_SYMBOL(__raw_writesl);

void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
	return sh_mv.mv_ioport_map(port, nr);
}
EXPORT_SYMBOL(ioport_map);

void ioport_unmap(void __iomem *addr)
{
	sh_mv.mv_ioport_unmap(addr);
}
EXPORT_SYMBOL(ioport_unmap);