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Merge from Etherboot 5.4
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Michael Brown
126
src/drivers/net/mlx_ipoib/bit_ops.h
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126
src/drivers/net/mlx_ipoib/bit_ops.h
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/*
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This software is available to you under a choice of one of two
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licenses. You may choose to be licensed under the terms of the GNU
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General Public License (GPL) Version 2, available at
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<http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
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license, available in the LICENSE.TXT file accompanying this
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software. These details are also available at
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<http://openib.org/license.html>.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
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*/
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#ifndef __bit_ops_h__
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#define __bit_ops_h__
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typedef unsigned long MT_offset_t;
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typedef unsigned long MT_size_t;
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typedef unsigned char pseudo_bit_t;
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struct addr_64_st {
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__u32 addr_l;
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__u32 addr_h;
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};
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#define MT_BIT_OFFSET(object_struct,reg_path) \
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((MT_offset_t) &( ((struct object_struct *)(0))-> reg_path ))
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#define MT_BIT_SIZE(object_struct,reg_path) \
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((MT_size_t) sizeof( ((struct object_struct *)(0))-> reg_path ))
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#define MT_BIT_OFFSET_SIZE(object_struct,reg_path) \
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MT_BIT_OFFSET(object_struct,reg_path),MT_BIT_SIZE(object_struct,reg_path)
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#define MT_BYTE_OFFSET(object_struct,reg_path) \
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((MT_offset_t) (MT_BIT_OFFSET(object_struct,reg_path)/8))
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#define MT_BYTE_SIZE(object_struct,reg_path) \
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((MT_size_t) MT_BIT_SIZE(object_struct,reg_path)/8)
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#define MT_BYTE_OFFSET_SIZE(object_struct,reg_path) \
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MT_BYTE_OFFSET(object_struct,reg_path),MT_BYTE_SIZE(object_struct,reg_path)
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#define MT_STRUCT_SIZE(object_struct) (sizeof(struct object_struct) >> 3)
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/*****************************************************************************************
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* Bit manipulation macros
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*****************************************************************************************/
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/* MASK generate a bit mask S bits width */
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#define MASK32(S) ( ((__u32) ~0L) >> (32-(S)) )
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/*
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* BITS generate a bit mask with bits O+S..O set (assumes 32 bit integer).
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* numbering bits as following: 31........................76543210
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*/
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#define BITS32(O,S) ( MASK32(S) << (O) )
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/*
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* MT_EXTRACT32 macro extracts S bits from (__u32)W with offset O
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* and shifts them O places to the right (right justifies the field extracted).
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*/
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#define MT_EXTRACT32(W,O,S) ( ((W)>>(O)) & MASK32(S) )
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/*
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* MT_INSERT32 macro inserts S bits with offset O from field F into word W (__u32)
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*/
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#define MT_INSERT32(W,F,O,S) ((W)= ( ( (W) & (~BITS32(O,S)) ) | (((F) & MASK32(S))<<(O)) ))
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/*
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* MT_EXTRACT_ARRAY32 macro is similar to EXTRACT but works on an array of (__u32),
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* thus offset may be larger than 32 (but not size).
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*/
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#define MT_EXTRACT_ARRAY32(A,O,S) MT_EXTRACT32(((__u32*)A)[O >> 5],(O & MASK32(5)),S)
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/*
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* MT_INSERT_ARRAY32 macro is similar to INSERT but works on an array of (__u32),
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* thus offset may be larger than 32 (but not size).
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*/
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#define MT_INSERT_ARRAY32(A,F,O,S) MT_INSERT32(((__u32*)A)[O >> 5],F,(O & MASK32(5)),S)
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#define INS_FLD(src, a, st, fld) MT_INSERT_ARRAY32(a, src, MT_BIT_OFFSET(st, fld), MT_BIT_SIZE(st, fld))
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#define EX_FLD(a, st, fld) MT_EXTRACT_ARRAY32(a, MT_BIT_OFFSET(st, fld), MT_BIT_SIZE(st, fld))
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/* return the address of the dword holding the field
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buf = pointer to buffer where to place the value
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st = struct describing the buffer
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fld = field in the struct where to insert the value */
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#define FLD_DW_ADDR(buf, st, fld) ((__u32 *)((__u32 *)(buf)+(((__u32)(&(((struct st *)(0))->fld))) >> 5)))
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/*
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val = value to insert
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buf = pointer to buffer where to place the value
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st = struct describing the buffer
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fld = field in the struct where to insert the value */
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#define INS_FLD_TO_BE(val, buf, st, fld) \
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do { \
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*FLD_DW_ADDR(buf, st, fld) = be32_to_cpu(*FLD_DW_ADDR(buf, st, fld)); \
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INS_FLD(val, buf, st, fld); \
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*FLD_DW_ADDR(buf, st, fld) = cpu_to_be32(*FLD_DW_ADDR(buf, st, fld)); \
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} \
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while(0)
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#define EX_FLD_FROM_BE(buf, st, fld, type) \
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({ \
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type field; \
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\
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*FLD_DW_ADDR(buf, st, fld) = be32_to_cpu(*FLD_DW_ADDR(buf, st, fld)); \
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field= EX_FLD(buf, st, fld); \
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*FLD_DW_ADDR(buf, st, fld) = cpu_to_be32(*FLD_DW_ADDR(buf, st, fld)); \
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\
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field; \
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})
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#endif /* __bit_ops_h__ */
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