cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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gpio-utils.h (1953B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * GPIO tools - utility helpers library for the GPIO tools
      4 *
      5 * Copyright (C) 2015 Linus Walleij
      6 *
      7 * Portions copied from iio_utils and lssio:
      8 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
      9 * Copyright (c) 2008 Jonathan Cameron
     10 * *
     11 */
     12#ifndef _GPIO_UTILS_H_
     13#define _GPIO_UTILS_H_
     14
     15#include <stdbool.h>
     16#include <string.h>
     17#include <linux/types.h>
     18
     19#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
     20
     21static inline int check_prefix(const char *str, const char *prefix)
     22{
     23	return strlen(str) > strlen(prefix) &&
     24		strncmp(str, prefix, strlen(prefix)) == 0;
     25}
     26
     27int gpiotools_request_line(const char *device_name,
     28			   unsigned int *lines,
     29			   unsigned int num_lines,
     30			   struct gpio_v2_line_config *config,
     31			   const char *consumer);
     32int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values);
     33int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values);
     34int gpiotools_release_line(const int fd);
     35
     36int gpiotools_get(const char *device_name, unsigned int line);
     37int gpiotools_gets(const char *device_name, unsigned int *lines,
     38		   unsigned int num_lines, unsigned int *values);
     39int gpiotools_set(const char *device_name, unsigned int line,
     40		  unsigned int value);
     41int gpiotools_sets(const char *device_name, unsigned int *lines,
     42		   unsigned int num_lines, unsigned int *values);
     43
     44/* helper functions for gpio_v2_line_values bits */
     45static inline void gpiotools_set_bit(__u64 *b, int n)
     46{
     47	*b |= _BITULL(n);
     48}
     49
     50static inline void gpiotools_change_bit(__u64 *b, int n)
     51{
     52	*b ^= _BITULL(n);
     53}
     54
     55static inline void gpiotools_clear_bit(__u64 *b, int n)
     56{
     57	*b &= ~_BITULL(n);
     58}
     59
     60static inline int gpiotools_test_bit(__u64 b, int n)
     61{
     62	return !!(b & _BITULL(n));
     63}
     64
     65static inline void gpiotools_assign_bit(__u64 *b, int n, bool value)
     66{
     67	if (value)
     68		gpiotools_set_bit(b, n);
     69	else
     70		gpiotools_clear_bit(b, n);
     71}
     72
     73#endif /* _GPIO_UTILS_H_ */