jlaitine commented on code in PR #8026: URL: https://github.com/apache/nuttx/pull/8026#discussion_r1064457337
########## mm/map/mm_map.c: ########## @@ -0,0 +1,327 @@ +/**************************************************************************** + * mm/map/mm_map.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/mm/map.h> +#include <stdbool.h> +#include <stddef.h> +#include <nuttx/sched.h> +#include <nuttx/kmalloc.h> +#include <assert.h> + +#if defined(CONFIG_BUILD_FLAT) || defined(__KERNEL__) + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +static bool in_range(FAR const void *start, size_t length, + FAR const void *range_start, size_t range_length) +{ + char *u_start = (char *)start; + char *u_end = u_start + length; + char *r_start = (char *)range_start; + char *r_end = r_start + range_length; + + return (u_start >= r_start && u_start < r_end && /* start is in range */ + u_end >= r_start && u_end <= r_end); /* end is in range */ +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: mm_map_lock + * + * Description: + * Get exclusive access to task_group's mm_map + * + ****************************************************************************/ + +int mm_map_lock(void) +{ + return nxrmutex_lock(&nxsched_self()->group->tg_mm_map.mm_map_mutex); +} + +/**************************************************************************** + * Name: mm_map_unlock + * + * Description: + * Relinquish exclusive access to task_group's mm_map + * + ****************************************************************************/ + +void mm_map_unlock(void) +{ + DEBUGVERIFY( + nxrmutex_unlock(&nxsched_self()->group->tg_mm_map.mm_map_mutex) + ); +} + +/**************************************************************************** + * Name: mm_map_initialize + * + * Description: + * Allocates a task group specific mm_map stucture. Called when the group + * is initialized + * + ****************************************************************************/ + +void mm_map_initialize(FAR struct mm_map_s *mm) +{ + sq_init(&mm->mm_map_sq); + nxrmutex_init(&mm->mm_map_mutex); +} + +/**************************************************************************** + * Name: mm_map_destroy + * + * Description: + * De-allocates a task group specific mm_map stucture and the mm_map_mutex + * + ****************************************************************************/ + +void mm_map_destroy(FAR struct mm_map_s *mm) Review Comment: removed task_group_s, only using mm_map_s * where needed ########## include/nuttx/mm/map.h: ########## @@ -73,11 +73,155 @@ struct mm_map_entry_s struct mm_map_s { sq_queue_t mm_map_sq; - mutex_t mm_map_mutex; + rmutex_t mm_map_mutex; }; /**************************************************************************** * Public Function Prototypes ****************************************************************************/ -#endif /* __INCLUDE_NUTTX_MM_MM_MAP_H */ +/**************************************************************************** + * Name: mm_map_lock + * + * Description: + * Get exclusive access to task_group's mm_map + * + * Input Parameters: + * mm - Pointer to the mm_map_s + * + * Returned Value: + * OK on success + * A negated errno value on failure + * + ****************************************************************************/ + +int mm_map_lock(FAR struct task_group_s *group); + +/**************************************************************************** + * Name: mm_map_unlock + * + * Description: + * Relinquish exclusive access to task_group's mm_map + * + * Input Parameters: + * mm - Pointer to the mm_map_s + * + * Returned Value: + * None + * + ****************************************************************************/ + +void mm_map_unlock(FAR struct task_group_s *group); + +/**************************************************************************** + * Name: mm_map_initialize + * + * Description: + * Initialization function, called only by group_initialize + * + * Input Parameters: + * mm - Pointer to the mm_map structure to be initialized + * + * Returned Value: + * None + * + ****************************************************************************/ + +void mm_map_initialize(FAR struct mm_map_s *mm); + +/**************************************************************************** + * Name: mm_map_destroy + * + * Description: + * Uninitialization function, called only by group_release + * + * Input Parameters: + * mm - Pointer to the mm_map structure to be initialized + * + * Returned Value: + * None + * + ****************************************************************************/ + +void mm_map_destroy(FAR struct mm_map_s *mm); + +/**************************************************************************** + * Name: mm_map_add + * + * Description: + * Adds a virtual memory area into the list of mappings + * + * Input Parameters: + * entry - A pointer to mm_map_entry_s, mapping info to be added + * + * Returned Value: + * OK Added successfully + * -EINVAL: Invalid attempt to get the semaphore + * -EINTR: The wait was interrupted by the receipt of a signal. + * -ENOMEM: Out of memory + * + ****************************************************************************/ + +int mm_map_add(FAR struct mm_map_entry_s *entry); + +/**************************************************************************** + * Name: mm_map_next + * + * Description: + * Returns the next mapping in the list, following the argument. + * Can be used to iterate through all the mappings. Returns the first + * mapping when the argument "entry" is NULL. + * + * Input Parameters: + * entry - Pointer to a single mapping in this task group or NULL to get + * the first one + * + * Returned Value: + * Pointer to the next mapping + * + ****************************************************************************/ + +FAR struct mm_map_entry_s *mm_map_next( + FAR const struct mm_map_entry_s *entry); + +/**************************************************************************** + * Name: mm_map_find + * + * Description: + * Find the first mapping matching address and length + * + * Input Parameters: + * vaddr - Start address of the mapped area + * length - Length of the mapping + * + * Returned Value: + * Pointer to the mapping, NULL if not found + * + ****************************************************************************/ + +FAR struct mm_map_entry_s *mm_map_find(FAR const void *vaddr, + size_t length); + +/**************************************************************************** + * Name: mm_map_remove + * + * Description: + * Removes a virtual memory area from the list of mappings + * Sets the given pointer argument to NULL after successful removal + * + * Input Parameters: + * group - Pointer to current task_group_s. NULL in process exit case + * map - Pointer to a pointer to the mapping to be removed + * + * Returned Value: + * OK: Removed successfully + * -EINVAL: Invalid attempt to get the semaphore + * -EINTR: The wait was interrupted by the receipt of a signal. + * -ENOENT: Memory area not found + * + ****************************************************************************/ + +int mm_map_remove(FAR struct task_group_s *group, + FAR struct mm_map_entry_s **map); Review Comment: done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
