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Diffstat (limited to 'gpxe/src/include/gpxe/bitops.h')
| -rw-r--r-- | gpxe/src/include/gpxe/bitops.h | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/gpxe/src/include/gpxe/bitops.h b/gpxe/src/include/gpxe/bitops.h deleted file mode 100644 index 8db34312..00000000 --- a/gpxe/src/include/gpxe/bitops.h +++ /dev/null @@ -1,230 +0,0 @@ -#ifndef _GPXE_BITOPS_H -#define _GPXE_BITOPS_H - -/* - * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -/** - * @file - * - * Bit operations - * - */ - -#include <stdint.h> -#include <byteswap.h> - -/* Endianness selection. - * - * This is a property of the NIC, not a property of the host CPU. - */ -#ifdef BITOPS_LITTLE_ENDIAN -#define cpu_to_BIT64 cpu_to_le64 -#define cpu_to_BIT32 cpu_to_le32 -#define BIT64_to_cpu le64_to_cpu -#define BIT32_to_cpu le32_to_cpu -#endif -#ifdef BITOPS_BIG_ENDIAN -#define cpu_to_BIT64 cpu_to_be64 -#define cpu_to_BIT32 cpu_to_be32 -#define BIT64_to_cpu be64_to_cpu -#define BIT32_to_cpu be32_to_cpu -#endif - -/** Datatype used to represent a bit in the pseudo-structures */ -typedef unsigned char pseudo_bit_t; - -/** - * Wrapper structure for pseudo_bit_t structures - * - * This structure provides a wrapper around pseudo_bit_t structures. - * It has the correct size, and also encapsulates type information - * about the underlying pseudo_bit_t-based structure, which allows the - * BIT_FILL() etc. macros to work without requiring explicit type - * information. - */ -#define PSEUDO_BIT_STRUCT( _structure ) \ - union { \ - uint8_t bytes[ sizeof ( _structure ) / 8 ]; \ - uint32_t dwords[ sizeof ( _structure ) / 32 ]; \ - uint64_t qwords[ sizeof ( _structure ) / 64 ]; \ - _structure *dummy[0]; \ - } u - -/** Get pseudo_bit_t structure type from wrapper structure pointer */ -#define PSEUDO_BIT_STRUCT_TYPE( _ptr ) \ - typeof ( *((_ptr)->u.dummy[0]) ) - -/** Bit offset of a field within a pseudo_bit_t structure */ -#define BIT_OFFSET( _ptr, _field ) \ - offsetof ( PSEUDO_BIT_STRUCT_TYPE ( _ptr ), _field ) - -/** Bit width of a field within a pseudo_bit_t structure */ -#define BIT_WIDTH( _ptr, _field ) \ - sizeof ( ( ( PSEUDO_BIT_STRUCT_TYPE ( _ptr ) * ) NULL )->_field ) - -/** Qword offset of a field within a pseudo_bit_t structure */ -#define QWORD_OFFSET( _ptr, _field ) \ - ( BIT_OFFSET ( _ptr, _field ) / 64 ) - -/** Qword bit offset of a field within a pseudo_bit_t structure */ -#define QWORD_BIT_OFFSET( _ptr, _index, _field ) \ - ( BIT_OFFSET ( _ptr, _field ) - ( 64 * (_index) ) ) - -/** Bit mask for a field within a pseudo_bit_t structure */ -#define BIT_MASK( _ptr, _field ) \ - ( ( ~( ( uint64_t ) 0 ) ) >> \ - ( 64 - BIT_WIDTH ( _ptr, _field ) ) ) - -/* - * Assemble native-endian qword from named fields and values - * - */ - -#define BIT_ASSEMBLE_1( _ptr, _index, _field, _value ) \ - ( ( ( uint64_t) (_value) ) << \ - QWORD_BIT_OFFSET ( _ptr, _index, _field ) ) - -#define BIT_ASSEMBLE_2( _ptr, _index, _field, _value, ... ) \ - ( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \ - BIT_ASSEMBLE_1 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_ASSEMBLE_3( _ptr, _index, _field, _value, ... ) \ - ( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \ - BIT_ASSEMBLE_2 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_ASSEMBLE_4( _ptr, _index, _field, _value, ... ) \ - ( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \ - BIT_ASSEMBLE_3 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_ASSEMBLE_5( _ptr, _index, _field, _value, ... ) \ - ( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \ - BIT_ASSEMBLE_4 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_ASSEMBLE_6( _ptr, _index, _field, _value, ... ) \ - ( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \ - BIT_ASSEMBLE_5 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_ASSEMBLE_7( _ptr, _index, _field, _value, ... ) \ - ( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \ - BIT_ASSEMBLE_6 ( _ptr, _index, __VA_ARGS__ ) ) - -/* - * Build native-endian (positive) qword bitmasks from named fields - * - */ - -#define BIT_MASK_1( _ptr, _index, _field ) \ - ( BIT_MASK ( _ptr, _field ) << \ - QWORD_BIT_OFFSET ( _ptr, _index, _field ) ) - -#define BIT_MASK_2( _ptr, _index, _field, ... ) \ - ( BIT_MASK_1 ( _ptr, _index, _field ) | \ - BIT_MASK_1 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_MASK_3( _ptr, _index, _field, ... ) \ - ( BIT_MASK_1 ( _ptr, _index, _field ) | \ - BIT_MASK_2 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_MASK_4( _ptr, _index, _field, ... ) \ - ( BIT_MASK_1 ( _ptr, _index, _field ) | \ - BIT_MASK_3 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_MASK_5( _ptr, _index, _field, ... ) \ - ( BIT_MASK_1 ( _ptr, _index, _field ) | \ - BIT_MASK_4 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_MASK_6( _ptr, _index, _field, ... ) \ - ( BIT_MASK_1 ( _ptr, _index, _field ) | \ - BIT_MASK_5 ( _ptr, _index, __VA_ARGS__ ) ) - -#define BIT_MASK_7( _ptr, _index, _field, ... ) \ - ( BIT_MASK_1 ( _ptr, _index, _field ) | \ - BIT_MASK_6 ( _ptr, _index, __VA_ARGS__ ) ) - -/* - * Populate little-endian qwords from named fields and values - * - */ - -#define BIT_FILL( _ptr, _index, _assembled ) do { \ - uint64_t *__ptr = &(_ptr)->u.qwords[(_index)]; \ - uint64_t __assembled = (_assembled); \ - *__ptr = cpu_to_BIT64 ( __assembled ); \ - } while ( 0 ) - -#define BIT_FILL_1( _ptr, _field1, ... ) \ - BIT_FILL ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - BIT_ASSEMBLE_1 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - _field1, __VA_ARGS__ ) ) - -#define BIT_FILL_2( _ptr, _field1, ... ) \ - BIT_FILL ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - BIT_ASSEMBLE_2 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - _field1, __VA_ARGS__ ) ) - -#define BIT_FILL_3( _ptr, _field1, ... ) \ - BIT_FILL ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - BIT_ASSEMBLE_3 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - _field1, __VA_ARGS__ ) ) - -#define BIT_FILL_4( _ptr, _field1, ... ) \ - BIT_FILL ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - BIT_ASSEMBLE_4 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - _field1, __VA_ARGS__ ) ) - -#define BIT_FILL_5( _ptr, _field1, ... ) \ - BIT_FILL ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - BIT_ASSEMBLE_5 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - _field1, __VA_ARGS__ ) ) - -#define BIT_FILL_6( _ptr, _field1, ... ) \ - BIT_FILL ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - BIT_ASSEMBLE_6 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ - _field1, __VA_ARGS__ ) ) - -/** Extract value of named field */ -#define BIT_GET64( _ptr, _field ) \ - ( { \ - unsigned int __index = QWORD_OFFSET ( _ptr, _field ); \ - uint64_t *__ptr = &(_ptr)->u.qwords[__index]; \ - uint64_t __value = BIT64_to_cpu ( *__ptr ); \ - __value >>= \ - QWORD_BIT_OFFSET ( _ptr, __index, _field ); \ - __value &= BIT_MASK ( _ptr, _field ); \ - __value; \ - } ) - -/** Extract value of named field (for fields up to the size of a long) */ -#define BIT_GET( _ptr, _field ) \ - ( ( unsigned long ) BIT_GET64 ( _ptr, _field ) ) - -#define BIT_SET( _ptr, _field, _value ) do { \ - unsigned int __index = QWORD_OFFSET ( _ptr, _field ); \ - uint64_t *__ptr = &(_ptr)->u.qwords[__index]; \ - unsigned int __shift = \ - QWORD_BIT_OFFSET ( _ptr, __index, _field ); \ - uint64_t __value = (_value); \ - *__ptr &= cpu_to_BIT64 ( ~( BIT_MASK ( _ptr, _field ) << \ - __shift ) ); \ - *__ptr |= cpu_to_BIT64 ( __value << __shift ); \ - } while ( 0 ) - -#endif /* _GPXE_BITOPS_H */ |