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VILLASnode/include/villas/kernel/kernel.h

90 lines
2.7 KiB
C

/** Linux kernel related functions.
*
* @file
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
/** @addtogroup fpga Kernel @{ */
#pragma once
#include <string.h>
#include <stdint.h>
/* Forward declarations */
struct version;
//#include <sys/capability.h>
/** Check if current process has capability \p cap.
*
* @retval 0 If capabilty is present.
* @retval <0 If capability is not present.
*/
//int kernel_check_cap(cap_value_t cap);
/** Get number of reserved hugepages. */
int kernel_get_nr_hugepages();
/** Set number of reserved hugepages. */
int kernel_set_nr_hugepages(int nr);
/** Get kernel cmdline parameter
*
* See https://www.kernel.org/doc/Documentation/kernel-parameters.txt
*
* @param param The cmdline parameter to look for.
* @param buf The string buffer to which the parameter value will be copied to.
* @param len The length of the buffer \p value
* @retval 0 Parameter \p key was found and value was copied to \p value
* @reval <>0 Kernel was not booted with parameter \p key
*/
int kernel_get_cmdline_param(const char *param, char *buf, size_t len);
/** Get the version of the kernel. */
int kernel_get_version(struct version *v);
/** Checks if a kernel module is loaded
*
* @param module the name of the module
* @retval 0 Module is loaded.
* @reval <>0 Module is not loaded.
*/
int kernel_module_loaded(const char *module);
/** Load kernel module via modprobe */
int kernel_module_load(const char *module);
/** Set parameter of loaded kernel module */
int kernel_module_set_param(const char *module, const char *param, const char *value);
/** Get cacheline size in bytes */
int kernel_get_cacheline_size();
/** Get the size of a standard page in bytes. */
int kernel_get_page_size();
/** Get the size of a huge page in bytes. */
int kernel_get_hugepage_size();
/** Set SMP affinity of IRQ */
int kernel_irq_setaffinity(unsigned irq, uintmax_t new, uintmax_t *old);
/** @} */