FreeBSD/Linux Kernel Cross Reference
sys/contrib/ncsw/inc/etc/mm_ext.h

     /* Copyright (c) 2008-2012 Freescale Semiconductor, Inc
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    /**************************************************************************//**
     @File          mm_ext.h
    
     @Description   Memory Manager Application Programming Interface
    *//***************************************************************************/
    #ifndef __MM_EXT
    #define __MM_EXT
    
    #include "std_ext.h"
    
    #define MM_MAX_ALIGNMENT    20  /* Alignments from 2 to 128 are available
                                       where maximum alignment defined as
                                       MM_MAX_ALIGNMENT power of 2 */
    
    #define MM_MAX_NAME_LEN     32
    
    /**************************************************************************//**
     @Group         etc_id   Utility Library Application Programming Interface
    
     @Description   External routines.
    
     @{
    *//***************************************************************************/
    
    /**************************************************************************//**
     @Group         mm_grp Flexible Memory Manager
    
     @Description   Flexible Memory Manager module functions,definitions and enums.
                    (All of the following functions,definitions and enums can be found in mm_ext.h)
    
     @{
    *//***************************************************************************/
    
    
    /**************************************************************************//**
     @Function      MM_Init
    
     @Description   Initializes a new MM object.
    
                    It initializes a new memory block consisting of base address
                    and size of the available memory by calling to MemBlock_Init
                    routine. It is also initializes a new free block for each
                    by calling FreeBlock_Init routine, which is pointed to
                    the almost all memory started from the required alignment
                    from the base address and to the end of the memory.
                    The handle to the new MM object is returned via "MM"
                    argument (passed by reference).
    
     @Param[in]     h_MM    - Handle to the MM object.
     @Param[in]     base    - Base address of the MM.
     @Param[in]     size    - Size of the MM.
    
     @Return        E_OK is returned on success. E_NOMEMORY is returned if the new MM object or a new free block can not be initialized.
    *//***************************************************************************/
    t_Error     MM_Init(t_Handle *h_MM, uint64_t base, uint64_t size);
    
    /**************************************************************************//**
     @Function      MM_Get
    
     @Description   Allocates a block of memory according to the given size and the alignment.
    
                    The Alignment argument tells from which
                    free list allocate a block of memory. 2^alignment indicates
                    the alignment that the base address of the allocated block
                    should have. So, the only values 1, 2, 4, 8, 16, 32 and 64
                    are available for the alignment argument.
                   The routine passes through the specific free list of free
                   blocks and seeks for a first block that have anough memory
                   that  is required (best fit).
                   After the block is found and data is allocated, it calls
                   the internal MM_CutFree routine to update all free lists
                   do not include a just allocated block. Of course, each
                   free list contains a free blocks with the same alignment.
                   It is also creates a busy block that holds
                   information about an allocated block.
   
    @Param[in]     h_MM        - Handle to the MM object.
    @Param[in]     size        - Size of the MM.
    @Param[in]     alignment   - Index as a power of two defines a required
                                 alignment (in bytes); Should be 1, 2, 4, 8, 16, 32 or 64
    @Param[in]     name        - The name that specifies an allocated block.
   
    @Return        base address of an allocated block ILLEGAL_BASE if can't allocate a block
   *//***************************************************************************/
   uint64_t    MM_Get(t_Handle h_MM, uint64_t size, uint64_t alignment, char *name);
   
   /**************************************************************************//**
    @Function      MM_GetBase
   
    @Description   Gets the base address of the required MM objects.
   
    @Param[in]     h_MM - Handle to the MM object.
   
    @Return        base address of the block.
   *//***************************************************************************/
   uint64_t    MM_GetBase(t_Handle h_MM);
   
   /**************************************************************************//**
    @Function      MM_GetForce
   
    @Description   Force memory allocation.
   
                   It means to allocate a block of memory of the given
                   size from the given base address.
                   The routine checks if the required block can be allocated
                   (that is it is free) and then, calls the internal MM_CutFree
                   routine to update all free lists do not include that block.
   
    @Param[in]     h_MM    - Handle to the MM object.
    @Param[in]     base    - Base address of the MM.
    @Param[in]     size    - Size of the MM.
    @Param[in]     name    - Name that specifies an allocated block.
   
    @Return        base address of an allocated block, ILLEGAL_BASE if can't allocate a block.
   *//***************************************************************************/
   uint64_t    MM_GetForce(t_Handle h_MM, uint64_t base, uint64_t size, char *name);
   
   /**************************************************************************//**
    @Function      MM_GetForceMin
   
    @Description   Allocates a block of memory according to the given size, the alignment and minimum base address.
   
                   The Alignment argument tells from which
                   free list allocate a block of memory. 2^alignment indicates
                   the alignment that the base address of the allocated block
                   should have. So, the only values 1, 2, 4, 8, 16, 32 and 64
                   are available for the alignment argument.
                   The minimum baser address forces the location of the block
                   to be from a given address onward.
                   The routine passes through the specific free list of free
                   blocks and seeks for the first base address equal or smaller
                   than the required minimum address and end address larger than
                   than the required base + its size - i.e. that may contain
                   the required block.
                   After the block is found and data is allocated, it calls
                   the internal MM_CutFree routine to update all free lists
                   do not include a just allocated block. Of course, each
                   free list contains a free blocks with the same alignment.
                   It is also creates a busy block that holds
                   information about an allocated block.
   
    @Param[in]     h_MM        - Handle to the MM object.
    @Param[in]     size        - Size of the MM.
    @Param[in]     alignment   - Index as a power of two defines a required
                                 alignment (in bytes); Should be 1, 2, 4, 8, 16, 32 or 64
    @Param[in]     min         - The minimum base address of the block.
    @Param[in]     name        - Name that specifies an allocated block.
   
    @Return        base address of an allocated block,ILLEGAL_BASE if can't allocate a block.
   *//***************************************************************************/
   uint64_t    MM_GetForceMin(t_Handle h_MM,
                              uint64_t size,
                              uint64_t alignment,
                              uint64_t min,
                              char     *name);
   
   /**************************************************************************//**
    @Function      MM_Put
   
    @Description   Puts a block of memory of the given base address back to the memory.
   
                   It checks if there is a busy block with the
                   given base address. If not, it returns 0, that
                   means can't free a block. Otherwise, it gets parameters of
                   the busy block and after it updates lists of free blocks,
                   removes that busy block from the list by calling to MM_CutBusy
                   routine.
                   After that it calls to MM_AddFree routine to add a new free
                   block to the free lists.
   
    @Param[in]     h_MM    - Handle to the MM object.
    @Param[in]     base    - Base address of the MM.
   
    @Return         The size of bytes released, 0 if failed.
   *//***************************************************************************/
   uint64_t    MM_Put(t_Handle h_MM, uint64_t base);
   
   /**************************************************************************//**
    @Function      MM_PutForce
   
    @Description   Releases a block of memory of the required size from the required base address.
   
                   First, it calls to MM_CutBusy routine
                   to cut a free block from the busy list. And then, calls to
                   MM_AddFree routine to add the free block to the free lists.
   
    @Param[in]     h_MM    - Handle to the MM object.
    @Param[in]     base    - Base address of of a block to free.
    @Param[in]     size    - Size of a block to free.
   
    @Return        The number of bytes released, 0 on failure.
   *//***************************************************************************/
   uint64_t    MM_PutForce(t_Handle h_MM, uint64_t base, uint64_t size);
   
   /**************************************************************************//**
    @Function      MM_Add
   
    @Description   Adds a new memory block for memory allocation.
   
                   When a new memory block is initialized and added to the
                   memory list, it calls to MM_AddFree routine to add the
                   new free block to the free lists.
   
    @Param[in]     h_MM    - Handle to the MM object.
    @Param[in]     base    - Base address of the memory block.
    @Param[in]     size    - Size of the memory block.
   
    @Return        E_OK on success, otherwise returns an error code.
   *//***************************************************************************/
   t_Error     MM_Add(t_Handle h_MM, uint64_t base, uint64_t size);
   
   /**************************************************************************//**
    @Function      MM_Dump
   
    @Description   Prints results of free and busy lists.
   
    @Param[in]     h_MM        - Handle to the MM object.
   *//***************************************************************************/
   void        MM_Dump(t_Handle h_MM);
   
   /**************************************************************************//**
    @Function      MM_Free
   
    @Description   Releases memory allocated for MM object.
   
    @Param[in]     h_MM - Handle of the MM object.
   *//***************************************************************************/
   void        MM_Free(t_Handle h_MM);
   
   /**************************************************************************//**
    @Function      MM_GetMemBlock
   
    @Description   Returns base address of the memory block specified by the index.
   
                   If index is 0, returns base address
                   of the first memory block, 1 - returns base address
                   of the second memory block, etc.
                   Note, those memory blocks are allocated by the
                   application before MM_Init or MM_Add and have to
                   be released by the application before or after invoking
                   the MM_Free routine.
   
    @Param[in]     h_MM    - Handle to the MM object.
    @Param[in]     index   - Index of the memory block.
   
    @Return        valid base address or ILLEGAL_BASE if no memory block specified by the index.
   *//***************************************************************************/
   uint64_t    MM_GetMemBlock(t_Handle h_MM, int index);
   
   /**************************************************************************//**
    @Function      MM_InRange
   
    @Description   Checks if a specific address is in the memory range of the passed MM object.
   
    @Param[in]     h_MM    - Handle to the MM object.
    @Param[in]     addr    - The address to be checked.
   
    @Return        TRUE if the address is in the address range of the block, FALSE otherwise.
   *//***************************************************************************/
   bool        MM_InRange(t_Handle h_MM, uint64_t addr);
   
   /**************************************************************************//**
    @Function      MM_GetFreeMemSize
   
    @Description   Returns the size (in bytes) of free memory.
   
    @Param[in]     h_MM    - Handle to the MM object.
   
    @Return        Free memory size in bytes.
   *//***************************************************************************/
   uint64_t MM_GetFreeMemSize(t_Handle h_MM);
   
   
   /** @} */ /* end of mm_grp group */
   /** @} */ /* end of etc_id group */
   
   #endif /* __MM_EXT_H */

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