60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
/*
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* Copyright (C) 2015, Intel Corporation. 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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder 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
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HELPERS_H
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#define HELPERS_H
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#include <stdint.h>
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#define BIT(n) (1UL << (n))
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void halt(void) __attribute__((__noreturn__));
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#define STRINGIFY(x) #x
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/* The C preprocessor will not expand macro arguments that are converted to
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* strings in the macro body using the '#' operator. The EXP_STRINGIFY macro
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* introduces an additional level of argument expansion for instances where
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* the developer wishes to convert the expanded argument to a string.
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*/
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#define EXP_STRINGIFY(x) STRINGIFY(x)
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#define ALIGN(x, amt) \
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(((x) & ~((amt) - 1)) + ((((x) & ((amt) - 1)) == 0) ? 0 : (amt)))
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/** Wrappers for the assembly 'out' instruction. */
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void outb(uint16_t port, uint8_t val);
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void outl(uint16_t port, uint32_t val);
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/** Wrappers for the assembly 'in' instruction */
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uint8_t inb(uint16_t port);
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uint32_t inl(uint16_t port);
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#endif /* HELPERS_H */
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