mirror of
https://github.com/OpenAMP/libmetal.git
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d3a27c1454
- start by "/**", - fix file relative path, - fix typos, Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
137 lines
3.0 KiB
C
137 lines
3.0 KiB
C
/*
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* Copyright (c) 2015, Xilinx Inc. and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/**
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* @file linux/sys.h
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* @brief Linux system primitives for libmetal.
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*/
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#ifndef __METAL_SYS__H__
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#error "Include metal/sys.h instead of metal/linux/sys.h"
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#endif
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#ifndef __METAL_LINUX_SYS__H__
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#define __METAL_LINUX_SYS__H__
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#include <fcntl.h>
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#include <libgen.h>
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#include <limits.h>
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#include <metal/cpu.h>
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#include <metal/errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <syslog.h>
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#include <sys/file.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <linux/futex.h>
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#include <sysfs/libsysfs.h>
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#ifdef HAVE_HUGETLBFS_H
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#include <hugetlbfs.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define METAL_INVALID_VADDR NULL
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#define MAX_PAGE_SIZES 32
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#define metal_yield() metal_cpu_yield()
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struct metal_device;
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/** Structure of shared page or hugepage sized data. */
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struct metal_page_size {
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/** Page size. */
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size_t page_size;
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/** Page shift. */
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unsigned long page_shift;
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/** Path to hugetlbfs (or tmpfs) mount point. */
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char path[PATH_MAX];
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/** Flags to use for mmap. */
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int mmap_flags;
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};
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/** Structure of linux specific libmetal runtime state. */
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struct metal_state {
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/** Common (system independent) data. */
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struct metal_common_state common;
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/** file descriptor for shared data. */
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int data_fd;
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/** system page size. */
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unsigned long page_size;
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/** system page shift. */
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unsigned long page_shift;
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/** sysfs mount point. */
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const char *tmp_path;
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/** available page sizes. */
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struct metal_page_size page_sizes[MAX_PAGE_SIZES];
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/** number of available page sizes. */
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int num_page_sizes;
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/** File descriptor for /proc/self/pagemap (or -1). */
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int pagemap_fd;
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};
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#ifdef METAL_INTERNAL
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int metal_linux_bus_init(void);
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void metal_linux_bus_finish(void);
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int metal_open(const char *path, int shm);
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int metal_map(int fd, off_t offset, size_t size, int expand,
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int flags, void **result);
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int metal_unmap(void *mem, size_t size);
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/**
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* @brief Read a device tree property of a device
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*
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* @param[in] device metal_device of the intended DT node
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* @param[in] property_name name of the property to be read
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* @param[out] output output buffer to store read data
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* @param[in] len number of bytes to be read
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* @return 0 on success, or -errno on error.
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*/
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int metal_linux_get_device_property(struct metal_device *device,
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const char *property_name,
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void *output, int len);
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#define metal_for_each_page_size_up(ps) \
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for ((ps) = &_metal.page_sizes[0]; \
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(ps) <= &_metal.page_sizes[_metal.num_page_sizes - 1]; \
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(ps)++)
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#define metal_for_each_page_size_down(ps) \
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for ((ps) = &_metal.page_sizes[_metal.num_page_sizes - 1]; \
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(ps) >= &_metal.page_sizes[0]; \
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(ps)--)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* __METAL_LINUX_SYS__H__ */
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