123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
/****************************************************************************
|
|
* mm/mm_gran/mm_gran.h
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __MM_MM_GRAN_MM_GRAN_H
|
|
#define __MM_MM_GRAN_MM_GRAN_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <arch/types.h>
|
|
#include <nuttx/mm/gran.h>
|
|
#include <nuttx/mutex.h>
|
|
#include <nuttx/spinlock.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Sizes of things */
|
|
|
|
#define SIZEOF_GAT(n) \
|
|
((n + 31) >> 5)
|
|
#define SIZEOF_GRAN_S(n) \
|
|
(sizeof(struct gran_s) + sizeof(uint32_t) * (SIZEOF_GAT(n) - 1))
|
|
|
|
/* Debug */
|
|
|
|
#ifdef CONFIG_DEBUG_GRAM
|
|
# define granerr _err
|
|
# define granwarn _warn
|
|
# define graninfo _info
|
|
#else
|
|
# define granerr merr
|
|
# define granwarn mwarn
|
|
# define graninfo minfo
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
/* This structure represents the state of one granule allocation */
|
|
|
|
struct gran_s
|
|
{
|
|
uint8_t log2gran; /* Log base 2 of the size of one granule */
|
|
uint16_t ngranules; /* The total number of (aligned) granules in the heap */
|
|
#ifdef CONFIG_GRAN_INTR
|
|
irqstate_t irqstate; /* For exclusive access to the GAT */
|
|
spinlock_t lock;
|
|
#else
|
|
mutex_t lock; /* For exclusive access to the GAT */
|
|
#endif
|
|
uintptr_t heapstart; /* The aligned start of the granule heap */
|
|
uint32_t gat[1]; /* Start of the granule allocation table */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: gran_enter_critical and gran_leave_critical
|
|
*
|
|
* Description:
|
|
* Critical section management for the granule allocator.
|
|
*
|
|
* Input Parameters:
|
|
* priv - Pointer to the gran state
|
|
*
|
|
* Returned Value:
|
|
* gran_enter_critical() may return any error reported by
|
|
* nxsem_wait_uninterruptible()
|
|
*
|
|
****************************************************************************/
|
|
|
|
int gran_enter_critical(FAR struct gran_s *priv);
|
|
void gran_leave_critical(FAR struct gran_s *priv);
|
|
|
|
/****************************************************************************
|
|
* Name: gran_mark_allocated
|
|
*
|
|
* Description:
|
|
* Mark a range of granules as allocated.
|
|
*
|
|
* Input Parameters:
|
|
* priv - The granule heap state structure.
|
|
* alloc - The address of the allocation.
|
|
* ngranules - The number of granules allocated
|
|
*
|
|
* Returned Value:
|
|
* On success, a non-NULL pointer to the allocated memory is returned;
|
|
* NULL is returned on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR void *gran_mark_allocated(FAR struct gran_s *priv, uintptr_t alloc,
|
|
unsigned int ngranules);
|
|
|
|
#endif /* __MM_MM_GRAN_MM_GRAN_H */
|