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Diffstat (limited to 'include/asm-arm/arch-pxa/bitfield.h')
-rw-r--r-- | include/asm-arm/arch-pxa/bitfield.h | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/include/asm-arm/arch-pxa/bitfield.h b/include/asm-arm/arch-pxa/bitfield.h deleted file mode 100644 index f1f0e3387d9c..000000000000 --- a/include/asm-arm/arch-pxa/bitfield.h +++ /dev/null | |||
@@ -1,113 +0,0 @@ | |||
1 | /* | ||
2 | * FILE bitfield.h | ||
3 | * | ||
4 | * Version 1.1 | ||
5 | * Author Copyright (c) Marc A. Viredaz, 1998 | ||
6 | * DEC Western Research Laboratory, Palo Alto, CA | ||
7 | * Date April 1998 (April 1997) | ||
8 | * System Advanced RISC Machine (ARM) | ||
9 | * Language C or ARM Assembly | ||
10 | * Purpose Definition of macros to operate on bit fields. | ||
11 | */ | ||
12 | |||
13 | |||
14 | |||
15 | #ifndef __BITFIELD_H | ||
16 | #define __BITFIELD_H | ||
17 | |||
18 | #ifndef __ASSEMBLY__ | ||
19 | #define UData(Data) ((unsigned long) (Data)) | ||
20 | #else | ||
21 | #define UData(Data) (Data) | ||
22 | #endif | ||
23 | |||
24 | |||
25 | /* | ||
26 | * MACRO: Fld | ||
27 | * | ||
28 | * Purpose | ||
29 | * The macro "Fld" encodes a bit field, given its size and its shift value | ||
30 | * with respect to bit 0. | ||
31 | * | ||
32 | * Note | ||
33 | * A more intuitive way to encode bit fields would have been to use their | ||
34 | * mask. However, extracting size and shift value information from a bit | ||
35 | * field's mask is cumbersome and might break the assembler (255-character | ||
36 | * line-size limit). | ||
37 | * | ||
38 | * Input | ||
39 | * Size Size of the bit field, in number of bits. | ||
40 | * Shft Shift value of the bit field with respect to bit 0. | ||
41 | * | ||
42 | * Output | ||
43 | * Fld Encoded bit field. | ||
44 | */ | ||
45 | |||
46 | #define Fld(Size, Shft) (((Size) << 16) + (Shft)) | ||
47 | |||
48 | |||
49 | /* | ||
50 | * MACROS: FSize, FShft, FMsk, FAlnMsk, F1stBit | ||
51 | * | ||
52 | * Purpose | ||
53 | * The macros "FSize", "FShft", "FMsk", "FAlnMsk", and "F1stBit" return | ||
54 | * the size, shift value, mask, aligned mask, and first bit of a | ||
55 | * bit field. | ||
56 | * | ||
57 | * Input | ||
58 | * Field Encoded bit field (using the macro "Fld"). | ||
59 | * | ||
60 | * Output | ||
61 | * FSize Size of the bit field, in number of bits. | ||
62 | * FShft Shift value of the bit field with respect to bit 0. | ||
63 | * FMsk Mask for the bit field. | ||
64 | * FAlnMsk Mask for the bit field, aligned on bit 0. | ||
65 | * F1stBit First bit of the bit field. | ||
66 | */ | ||
67 | |||
68 | #define FSize(Field) ((Field) >> 16) | ||
69 | #define FShft(Field) ((Field) & 0x0000FFFF) | ||
70 | #define FMsk(Field) (((UData (1) << FSize (Field)) - 1) << FShft (Field)) | ||
71 | #define FAlnMsk(Field) ((UData (1) << FSize (Field)) - 1) | ||
72 | #define F1stBit(Field) (UData (1) << FShft (Field)) | ||
73 | |||
74 | |||
75 | /* | ||
76 | * MACRO: FInsrt | ||
77 | * | ||
78 | * Purpose | ||
79 | * The macro "FInsrt" inserts a value into a bit field by shifting the | ||
80 | * former appropriately. | ||
81 | * | ||
82 | * Input | ||
83 | * Value Bit-field value. | ||
84 | * Field Encoded bit field (using the macro "Fld"). | ||
85 | * | ||
86 | * Output | ||
87 | * FInsrt Bit-field value positioned appropriately. | ||
88 | */ | ||
89 | |||
90 | #define FInsrt(Value, Field) \ | ||
91 | (UData (Value) << FShft (Field)) | ||
92 | |||
93 | |||
94 | /* | ||
95 | * MACRO: FExtr | ||
96 | * | ||
97 | * Purpose | ||
98 | * The macro "FExtr" extracts the value of a bit field by masking and | ||
99 | * shifting it appropriately. | ||
100 | * | ||
101 | * Input | ||
102 | * Data Data containing the bit-field to be extracted. | ||
103 | * Field Encoded bit field (using the macro "Fld"). | ||
104 | * | ||
105 | * Output | ||
106 | * FExtr Bit-field value. | ||
107 | */ | ||
108 | |||
109 | #define FExtr(Data, Field) \ | ||
110 | ((UData (Data) >> FShft (Field)) & FAlnMsk (Field)) | ||
111 | |||
112 | |||
113 | #endif /* __BITFIELD_H */ | ||