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5adcaf50 SR |
1 | /* |
2 | * I/O string operations | |
3 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
4 | * Copyright (C) 2006 IBM Corporation | |
5 | * | |
6 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) | |
7 | * and Paul Mackerras. | |
8 | * | |
9 | * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com) | |
10 | * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) | |
11 | * | |
12 | * Rewritten in C by Stephen Rothwell. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License | |
16 | * as published by the Free Software Foundation; either version | |
17 | * 2 of the License, or (at your option) any later version. | |
18 | */ | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/compiler.h> | |
22 | #include <linux/module.h> | |
23 | ||
24 | #include <asm/io.h> | |
caf81329 SR |
25 | #include <asm/firmware.h> |
26 | #include <asm/bug.h> | |
5adcaf50 | 27 | |
4cb3cee0 | 28 | void _insb(const volatile u8 __iomem *port, void *buf, long count) |
5adcaf50 SR |
29 | { |
30 | u8 *tbuf = buf; | |
31 | u8 tmp; | |
32 | ||
33 | if (unlikely(count <= 0)) | |
34 | return; | |
35 | asm volatile("sync"); | |
36 | do { | |
37 | tmp = *port; | |
38 | asm volatile("eieio"); | |
39 | *tbuf++ = tmp; | |
40 | } while (--count != 0); | |
41 | asm volatile("twi 0,%0,0; isync" : : "r" (tmp)); | |
42 | } | |
43 | EXPORT_SYMBOL(_insb); | |
44 | ||
45 | void _outsb(volatile u8 __iomem *port, const void *buf, long count) | |
46 | { | |
47 | const u8 *tbuf = buf; | |
48 | ||
49 | if (unlikely(count <= 0)) | |
50 | return; | |
51 | asm volatile("sync"); | |
52 | do { | |
53 | *port = *tbuf++; | |
54 | } while (--count != 0); | |
55 | asm volatile("sync"); | |
56 | } | |
57 | EXPORT_SYMBOL(_outsb); | |
58 | ||
4cb3cee0 | 59 | void _insw_ns(const volatile u16 __iomem *port, void *buf, long count) |
5adcaf50 SR |
60 | { |
61 | u16 *tbuf = buf; | |
62 | u16 tmp; | |
63 | ||
64 | if (unlikely(count <= 0)) | |
65 | return; | |
66 | asm volatile("sync"); | |
67 | do { | |
68 | tmp = *port; | |
69 | asm volatile("eieio"); | |
70 | *tbuf++ = tmp; | |
71 | } while (--count != 0); | |
72 | asm volatile("twi 0,%0,0; isync" : : "r" (tmp)); | |
73 | } | |
74 | EXPORT_SYMBOL(_insw_ns); | |
75 | ||
76 | void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count) | |
77 | { | |
78 | const u16 *tbuf = buf; | |
79 | ||
80 | if (unlikely(count <= 0)) | |
81 | return; | |
82 | asm volatile("sync"); | |
83 | do { | |
84 | *port = *tbuf++; | |
85 | } while (--count != 0); | |
86 | asm volatile("sync"); | |
87 | } | |
88 | EXPORT_SYMBOL(_outsw_ns); | |
89 | ||
4cb3cee0 | 90 | void _insl_ns(const volatile u32 __iomem *port, void *buf, long count) |
5adcaf50 SR |
91 | { |
92 | u32 *tbuf = buf; | |
93 | u32 tmp; | |
94 | ||
95 | if (unlikely(count <= 0)) | |
96 | return; | |
97 | asm volatile("sync"); | |
98 | do { | |
99 | tmp = *port; | |
100 | asm volatile("eieio"); | |
101 | *tbuf++ = tmp; | |
102 | } while (--count != 0); | |
103 | asm volatile("twi 0,%0,0; isync" : : "r" (tmp)); | |
104 | } | |
105 | EXPORT_SYMBOL(_insl_ns); | |
106 | ||
107 | void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count) | |
108 | { | |
109 | const u32 *tbuf = buf; | |
110 | ||
111 | if (unlikely(count <= 0)) | |
112 | return; | |
113 | asm volatile("sync"); | |
114 | do { | |
115 | *port = *tbuf++; | |
116 | } while (--count != 0); | |
117 | asm volatile("sync"); | |
118 | } | |
119 | EXPORT_SYMBOL(_outsl_ns); |