139 lines
4.7 KiB
C
139 lines
4.7 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SCI_UTIL_H_
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#define _SCI_UTIL_H_
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#include "sci_types.h"
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/**
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* SCIC_SWAP_DWORD() -
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*
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* Normal byte swap macro
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*/
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#define SCIC_SWAP_DWORD(x) \
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(\
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(((x) >> 24) & 0x000000FF) \
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| (((x) >> 8) & 0x0000FF00) \
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| (((x) << 8) & 0x00FF0000) \
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| (((x) << 24) & 0xFF000000) \
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)
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#define SCIC_BUILD_DWORD(char_buffer) \
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(\
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((char_buffer)[0] << 24) \
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| ((char_buffer)[1] << 16) \
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| ((char_buffer)[2] << 8) \
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| ((char_buffer)[3]) \
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)
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#define SCI_FIELD_OFFSET(type, field) ((unsigned long)&(((type *)0)->field))
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/**
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* sci_physical_address_add() -
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*
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* This macro simply performs addition on an dma_addr_t type. The
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* lower u32 value is "clipped" or "wrapped" back through 0. When this occurs
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* the upper 32-bits are incremented by 1.
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*/
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#define sci_physical_address_add(physical_address, value) \
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{ \
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u32 lower = lower_32_bits((physical_address)); \
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u32 upper = upper_32_bits((physical_address)); \
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\
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if (lower + (value) < lower) \
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upper += 1; \
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\
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lower += (value); \
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sci_cb_make_physical_address(physical_address, upper, lower); \
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}
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/**
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* sci_physical_address_subtract() -
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*
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* This macro simply performs subtraction on an dma_addr_t type. The
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* lower u32 value is "clipped" or "wrapped" back through 0. When this occurs
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* the upper 32-bits are decremented by 1.
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*/
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#define sci_physical_address_subtract(physical_address, value) \
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{ \
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u32 lower = lower_32_bits((physical_address)); \
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u32 upper = upper_32_bits((physical_address)); \
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\
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if (lower - (value) > lower) \
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upper -= 1; \
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\
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lower -= (value); \
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sci_cb_make_physical_address(physical_address, upper, lower); \
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}
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/**
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* scic_word_copy_with_swap() - Copy the data from source to destination and
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* swap the bytes during the copy.
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* @destination: This parameter specifies the destination address to which the
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* data is to be copied.
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* @source: This parameter specifies the source address from which data is to
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* be copied.
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* @word_count: This parameter specifies the number of 32-bit words to copy and
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* byte swap.
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*
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*/
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void scic_word_copy_with_swap(
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u32 *destination,
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u32 *source,
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u32 word_count);
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#endif /* _SCI_UTIL_H_ */
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