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
169
170
171
172
173
174
175
176
177
178
179
180
181
|
#ifndef _ASM_X86_IO_64_H
#define _ASM_X86_IO_64_H
/*
* This file contains the definitions for the x86 IO instructions
* inb/inw/inl/outb/outw/outl and the "string versions" of the same
* (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
* versions of the single-IO instructions (inb_p/inw_p/..).
*
* This file is not meant to be obfuscating: it's just complicated
* to (a) handle it all in a way that makes gcc able to optimize it
* as well as possible and (b) trying to avoid writing the same thing
* over and over again with slight variations and possibly making a
* mistake somewhere.
*/
/*
* Thanks to James van Artsdalen for a better timing-fix than
* the two short jumps: using outb's to a nonexistent port seems
* to guarantee better timings even on fast machines.
*
* On the other hand, I'd like to be sure of a non-existent port:
* I feel a bit unsafe about using 0x80 (should be safe, though)
*
* Linus
*/
/*
* Bit simplified and optimized by Jan Hubicka
* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
*
* isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
* isa_read[wl] and isa_write[wl] fixed
* - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*/
extern void native_io_delay(void);
extern int io_delay_type;
extern void io_delay_init(void);
#if defined(CONFIG_PARAVIRT)
#include <asm/paravirt.h>
#else
static inline void slow_down_io(void)
{
native_io_delay();
#ifdef REALLY_SLOW_IO
native_io_delay();
native_io_delay();
native_io_delay();
#endif
}
#endif
/*
* Talk about misusing macros..
*/
#define __OUT1(s, x) \
static inline void out##s(unsigned x value, unsigned short port) {
#define __OUT2(s, s1, s2) \
asm volatile ("out" #s " %" s1 "0,%" s2 "1"
#ifndef REALLY_SLOW_IO
#define REALLY_SLOW_IO
#define UNSET_REALLY_SLOW_IO
#endif
#define __OUT(s, s1, x) \
__OUT1(s, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
} \
__OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
slow_down_io(); \
}
#define __IN1(s) \
static inline RETURN_TYPE in##s(unsigned short port) \
{ \
RETURN_TYPE _v;
#define __IN2(s, s1, s2) \
asm volatile ("in" #s " %" s2 "1,%" s1 "0"
#define __IN(s, s1, i...) \
__IN1(s) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
return _v; \
} \
__IN1(s##_p) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
slow_down_io(); \
return _v; }
#ifdef UNSET_REALLY_SLOW_IO
#undef REALLY_SLOW_IO
#endif
#define __INS(s) \
static inline void ins##s(unsigned short port, void *addr, \
unsigned long count) \
{ \
asm volatile ("rep ; ins" #s \
: "=D" (addr), "=c" (count) \
: "d" (port), "0" (addr), "1" (count)); \
}
#define __OUTS(s) \
static inline void outs##s(unsigned short port, const void *addr, \
unsigned long count) \
{ \
asm volatile ("rep ; outs" #s \
: "=S" (addr), "=c" (count) \
: "d" (port), "0" (addr), "1" (count)); \
}
#define RETURN_TYPE unsigned char
__IN(b, "")
#undef RETURN_TYPE
#define RETURN_TYPE unsigned short
__IN(w, "")
#undef RETURN_TYPE
#define RETURN_TYPE unsigned int
__IN(l, "")
#undef RETURN_TYPE
__OUT(b, "b", char)
__OUT(w, "w", short)
__OUT(l, , int)
__INS(b)
__INS(w)
__INS(l)
__OUTS(b)
__OUTS(w)
__OUTS(l)
#if defined(__KERNEL__) && defined(__x86_64__)
#include <linux/vmalloc.h>
#include <asm-generic/iomap.h>
void __memcpy_fromio(void *, unsigned long, unsigned);
void __memcpy_toio(unsigned long, const void *, unsigned);
static inline void memcpy_fromio(void *to, const volatile void __iomem *from,
unsigned len)
{
__memcpy_fromio(to, (unsigned long)from, len);
}
static inline void memcpy_toio(volatile void __iomem *to, const void *from,
unsigned len)
{
__memcpy_toio((unsigned long)to, from, len);
}
void memset_io(volatile void __iomem *a, int b, size_t c);
/*
* ISA space is 'always mapped' on a typical x86 system, no need to
* explicitly ioremap() it. The fact that the ISA IO space is mapped
* to PAGE_OFFSET is pure coincidence - it does not mean ISA values
* are physical addresses. The following constant pointer can be
* used as the IO-area pointer (it can be iounmapped as well, so the
* analogy with PCI is quite large):
*/
#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
#define flush_write_buffers()
/*
* Convert a virtual cached pointer to an uncached pointer
*/
#define xlate_dev_kmem_ptr(p) p
#endif /* __KERNEL__ */
#endif /* _ASM_X86_IO_64_H */
|
