7df63fcae0
Added --terse and --mailback options to the make stylecheck target. It also does continue even if it enounters a possible error. We decided on two exceptions from the linux kernel coding standard: - Empty wait while loops may end with ; on the same line. - All blocks after while, if, for have to be in brackets even if they only contain one statement. Otherwise it is easy to introduce an error. Checkpatch needs to be adapted to reflect those changes.
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2009 Piotr Esden-Tempski <piotr@esden.net>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBOPENCM3_TOOLS_H
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#define LIBOPENCM3_TOOLS_H
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/*
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* Register accessors / manipulators
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*/
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/* Get register content. */
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#define GET_REG(REG) ((u16) *REG)
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/* Set register content. */
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#define SET_REG(REG, VAL) (*REG = (u16)VAL)
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/* Clear register bit. */
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#define CLR_REG_BIT(REG, BIT) SET_REG(REG, (~BIT))
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/* Clear register bit masking out some bits that must not be touched. */
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#define CLR_REG_BIT_MSK(REG, MSK, BIT) \
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SET_REG(REG, (GET_REG(REG) & MSK & (~BIT)))
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/* Get masked out bit value. */
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#define GET_REG_BIT(REG, BIT) (GET_REG(REG) & BIT)
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/*
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* Set/reset a bit in a masked window by using toggle mechanism.
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*
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* This means that we look at the bits in the bit window designated by
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* the mask. If the bit in the masked window is not matching the
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* bitmask BIT then we write 1 and if the bit in the masked window is
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* matching the bitmask BIT we write 0.
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*
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* TODO: We may need a faster implementation of that one?
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*/
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#define TOG_SET_REG_BIT_MSK(REG, MSK, BIT) \
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do { \
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register u16 toggle_mask = GET_REG(REG) & (MSK); \
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register u16 bit_selector; \
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for (bit_selector = 1; bit_selector; bit_selector <<= 1) { \
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if ((bit_selector & (BIT)) != 0) \
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toggle_mask ^= bit_selector; \
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} \
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SET_REG(REG, toggle_mask); \
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} while (0)
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#endif
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