aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc/include/asm/io_32.h
blob: 407ac14295f43ec01e93141e1673794d5e3f024c (plain) (blame)
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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
#ifndef __SPARC_IO_H
#define __SPARC_IO_H

#include <linux/kernel.h>
#include <linux/ioport.h>  /* struct resource */

#define IO_SPACE_LIMIT 0xffffffff

#define memset_io(d,c,sz)     _memset_io(d,c,sz)
#define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
#define memcpy_toio(d,s,sz)   _memcpy_toio(d,s,sz)

#include <asm-generic/io.h>

static inline void _memset_io(volatile void __iomem *dst,
                              int c, __kernel_size_t n)
{
	volatile void __iomem *d = dst;

	while (n--) {
		writeb(c, d);
		d++;
	}
}

static inline void _memcpy_fromio(void *dst, const volatile void __iomem *src,
                                  __kernel_size_t n)
{
	char *d = dst;

	while (n--) {
		char tmp = readb(src);
		*d++ = tmp;
		src++;
	}
}

static inline void _memcpy_toio(volatile void __iomem *dst, const void *src,
                                __kernel_size_t n)
{
	const char *s = src;
	volatile void __iomem *d = dst;

	while (n--) {
		char tmp = *s++;
		writeb(tmp, d);
		d++;
	}
}

/*
 * SBus accessors.
 *
 * SBus has only one, memory mapped, I/O space.
 * We do not need to flip bytes for SBus of course.
 */
static inline u8 sbus_readb(const volatile void __iomem *addr)
{
	return *(__force volatile u8 *)addr;
}

static inline u16 sbus_readw(const volatile void __iomem *addr)
{
	return *(__force volatile u16 *)addr;
}

static inline u32 sbus_readl(const volatile void __iomem *addr)
{
	return *(__force volatile u32 *)addr;
}

static inline void sbus_writeb(u8 b, volatile void __iomem *addr)
{
	*(__force volatile u8 *)addr = b;
}

static inline void sbus_writew(u16 w, volatile void __iomem *addr)
{
	*(__force volatile u16 *)addr = w;
}

static inline void sbus_writel(u32 l, volatile void __iomem *addr)
{
	*(__force volatile u32 *)addr = l;
}

static inline void sbus_memset_io(volatile void __iomem *__dst, int c,
                                  __kernel_size_t n)
{
	while(n--) {
		sbus_writeb(c, __dst);
		__dst++;
	}
}

static inline void sbus_memcpy_fromio(void *dst,
                                      const volatile void __iomem *src,
                                      __kernel_size_t n)
{
	char *d = dst;

	while (n--) {
		char tmp = sbus_readb(src);
		*d++ = tmp;
		src++;
	}
}

static inline void sbus_memcpy_toio(volatile void __iomem *dst,
                                    const void *src,
                                    __kernel_size_t n)
{
	const char *s = src;
	volatile void __iomem *d = dst;

	while (n--) {
		char tmp = *s++;
		sbus_writeb(tmp, d);
		d++;
	}
}

#ifdef __KERNEL__

/*
 * Bus number may be embedded in the higher bits of the physical address.
 * This is why we have no bus number argument to ioremap().
 */
void __iomem *ioremap(unsigned long offset, unsigned long size);
#define ioremap_nocache(X,Y)	ioremap((X),(Y))
#define ioremap_wc(X,Y)		ioremap((X),(Y))
void iounmap(volatile void __iomem *addr);

/* Create a virtual mapping cookie for an IO port range */
void __iomem *ioport_map(unsigned long port, unsigned int nr);
void ioport_unmap(void __iomem *);

/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
void pci_iounmap(struct pci_dev *dev, void __iomem *);



/*
 * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
 * so rtc_port is static in it. This should not change unless a new
 * hardware pops up.
 */
#define RTC_PORT(x)   (rtc_port + (x))
#define RTC_ALWAYS_BCD  0

static inline int sbus_can_dma_64bit(void)
{
	return 0; /* actually, sparc_cpu_model==sun4d */
}
static inline int sbus_can_burst64(void)
{
	return 0; /* actually, sparc_cpu_model==sun4d */
}
struct device;
void sbus_set_sbus64(struct device *, int);

#endif

#define __ARCH_HAS_NO_PAGE_ZERO_MAPPED		1


#endif /* !(__SPARC_IO_H) */