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-rw-r--r--include/asm-arm/arch-sa1100/bitfield.h113
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diff --git a/include/asm-arm/arch-sa1100/bitfield.h b/include/asm-arm/arch-sa1100/bitfield.h
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--- a/include/asm-arm/arch-sa1100/bitfield.h
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-/*
- * FILE bitfield.h
- *
- * Version 1.1
- * Author Copyright (c) Marc A. Viredaz, 1998
- * DEC Western Research Laboratory, Palo Alto, CA
- * Date April 1998 (April 1997)
- * System Advanced RISC Machine (ARM)
- * Language C or ARM Assembly
- * Purpose Definition of macros to operate on bit fields.
- */
-
-
-
-#ifndef __BITFIELD_H
-#define __BITFIELD_H
-
-#ifndef __ASSEMBLY__
-#define UData(Data) ((unsigned long) (Data))
-#else
-#define UData(Data) (Data)
-#endif
-
-
-/*
- * MACRO: Fld
- *
- * Purpose
- * The macro "Fld" encodes a bit field, given its size and its shift value
- * with respect to bit 0.
- *
- * Note
- * A more intuitive way to encode bit fields would have been to use their
- * mask. However, extracting size and shift value information from a bit
- * field's mask is cumbersome and might break the assembler (255-character
- * line-size limit).
- *
- * Input
- * Size Size of the bit field, in number of bits.
- * Shft Shift value of the bit field with respect to bit 0.
- *
- * Output
- * Fld Encoded bit field.
- */
-
-#define Fld(Size, Shft) (((Size) << 16) + (Shft))
-
-
-/*
- * MACROS: FSize, FShft, FMsk, FAlnMsk, F1stBit
- *
- * Purpose
- * The macros "FSize", "FShft", "FMsk", "FAlnMsk", and "F1stBit" return
- * the size, shift value, mask, aligned mask, and first bit of a
- * bit field.
- *
- * Input
- * Field Encoded bit field (using the macro "Fld").
- *
- * Output
- * FSize Size of the bit field, in number of bits.
- * FShft Shift value of the bit field with respect to bit 0.
- * FMsk Mask for the bit field.
- * FAlnMsk Mask for the bit field, aligned on bit 0.
- * F1stBit First bit of the bit field.
- */
-
-#define FSize(Field) ((Field) >> 16)
-#define FShft(Field) ((Field) & 0x0000FFFF)
-#define FMsk(Field) (((UData (1) << FSize (Field)) - 1) << FShft (Field))
-#define FAlnMsk(Field) ((UData (1) << FSize (Field)) - 1)
-#define F1stBit(Field) (UData (1) << FShft (Field))
-
-
-/*
- * MACRO: FInsrt
- *
- * Purpose
- * The macro "FInsrt" inserts a value into a bit field by shifting the
- * former appropriately.
- *
- * Input
- * Value Bit-field value.
- * Field Encoded bit field (using the macro "Fld").
- *
- * Output
- * FInsrt Bit-field value positioned appropriately.
- */
-
-#define FInsrt(Value, Field) \
- (UData (Value) << FShft (Field))
-
-
-/*
- * MACRO: FExtr
- *
- * Purpose
- * The macro "FExtr" extracts the value of a bit field by masking and
- * shifting it appropriately.
- *
- * Input
- * Data Data containing the bit-field to be extracted.
- * Field Encoded bit field (using the macro "Fld").
- *
- * Output
- * FExtr Bit-field value.
- */
-
-#define FExtr(Data, Field) \
- ((UData (Data) >> FShft (Field)) & FAlnMsk (Field))
-
-
-#endif /* __BITFIELD_H */