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

     /* Copyright (c) 2008-2012 Freescale Semiconductor, Inc
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     *       derived from this software without specific prior written permission.
     *
     *
     * ALTERNATIVELY, this software may be distributed under the terms of the
     * GNU General Public License ("GPL") as published by the Free Software
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     * later version.
     *
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    /**************************************************************************//**
    
     @File          memcpy_ext.h
    
     @Description   Efficient functions for copying and setting blocks of memory.
    *//***************************************************************************/
    
    #ifndef __MEMCPY_EXT_H
    #define __MEMCPY_EXT_H
    
    #include "std_ext.h"
    
    
    /**************************************************************************//**
     @Group         etc_id   Utility Library Application Programming Interface
    
     @Description   External routines.
    
     @{
    *//***************************************************************************/
    
    /**************************************************************************//**
     @Group         mem_cpy Memory Copy
    
     @Description   Memory Copy module functions,definitions and enums.
    
     @{
    *//***************************************************************************/
    
    /**************************************************************************//**
     @Function      MemCpy32
    
     @Description   Copies one memory buffer into another one in 4-byte chunks!
                    Which should be more efficient than byte by byte.
    
                    For large buffers (over 60 bytes) this function is about 4 times
                    more efficient than the trivial memory copy. For short buffers
                    it is reduced to the trivial copy and may be a bit worse.
    
     @Param[in]     pDst    - The address of the destination buffer.
     @Param[in]     pSrc    - The address of the source buffer.
     @Param[in]     size    - The number of bytes that will be copied from pSrc to pDst.
    
     @Return        pDst (the address of the destination buffer).
    
     @Cautions      There is no parameter or boundary checking! It is up to the user
                    to supply non-null parameters as source & destination and size
                    that actually fits into the destination buffer.
    *//***************************************************************************/
    void * MemCpy32(void* pDst,void* pSrc, uint32_t size);
    void * IO2IOCpy32(void* pDst,void* pSrc, uint32_t size);
    void * IO2MemCpy32(void* pDst,void* pSrc, uint32_t size);
    void * Mem2IOCpy32(void* pDst,void* pSrc, uint32_t size);
    
    /**************************************************************************//**
     @Function      MemCpy64
    
     @Description   Copies one memory buffer into another one in 8-byte chunks!
                    Which should be more efficient than byte by byte.
    
                    For large buffers (over 60 bytes) this function is about 8 times
                    more efficient than the trivial memory copy. For short buffers
                    it is reduced to the trivial copy and may be a bit worse.
    
                    Some testing suggests that MemCpy32() preforms better than
                    MemCpy64() over small buffers. On average they break even at
                   100 byte buffers. For buffers larger than that MemCpy64 is
                   superior.
   
    @Param[in]     pDst    - The address of the destination buffer.
    @Param[in]     pSrc    - The address of the source buffer.
    @Param[in]     size    - The number of bytes that will be copied from pSrc to pDst.
   
    @Return        pDst (the address of the destination buffer).
   
    @Cautions      There is no parameter or boundary checking! It is up to the user
                   to supply non null parameters as source & destination and size
                   that actually fits into their buffer.
   
                   Do not use under Linux.
   *//***************************************************************************/
   void * MemCpy64(void* pDst,void* pSrc, uint32_t size);
   
   /**************************************************************************//**
    @Function      MemSet32
   
    @Description   Sets all bytes of a memory buffer to a specific value, in
                   4-byte chunks.
   
    @Param[in]     pDst    - The address of the destination buffer.
    @Param[in]     val     - Value to set destination bytes to.
    @Param[in]     size    - The number of bytes that will be set to val.
   
    @Return        pDst (the address of the destination buffer).
   
    @Cautions      There is no parameter or boundary checking! It is up to the user
                   to supply non null parameter as destination and size
                   that actually fits into the destination buffer.
   *//***************************************************************************/
   void * MemSet32(void* pDst, uint8_t val, uint32_t size);
   void * IOMemSet32(void* pDst, uint8_t val, uint32_t size);
   
   /**************************************************************************//**
    @Function      MemSet64
   
    @Description   Sets all bytes of a memory buffer to a specific value, in
                   8-byte chunks.
   
    @Param[in]     pDst    - The address of the destination buffer.
    @Param[in]     val     - Value to set destination bytes to.
    @Param[in]     size    - The number of bytes that will be set to val.
   
    @Return        pDst (the address of the destination buffer).
   
    @Cautions      There is no parameter or boundary checking! It is up to the user
                   to supply non null parameter as destination and size
                   that actually fits into the destination buffer.
   *//***************************************************************************/
   void * MemSet64(void* pDst, uint8_t val, uint32_t size);
   
   /**************************************************************************//**
    @Function      MemDisp
   
    @Description   Displays a block of memory in chunks of 32 bits.
   
    @Param[in]     addr    - The address of the memory to display.
    @Param[in]     size    - The number of bytes that will be displayed.
   
    @Return        None.
   
    @Cautions      There is no parameter or boundary checking! It is up to the user
                   to supply non null parameter as destination and size
                   that actually fits into the destination buffer.
   *//***************************************************************************/
   void MemDisp(uint8_t *addr, int size);
   
   /**************************************************************************//**
    @Function      MemCpy8
   
    @Description   Trivial copy one memory buffer into another byte by byte
   
    @Param[in]     pDst    - The address of the destination buffer.
    @Param[in]     pSrc    - The address of the source buffer.
    @Param[in]     size    - The number of bytes that will be copied from pSrc to pDst.
   
    @Return        pDst (the address of the destination buffer).
   
    @Cautions      There is no parameter or boundary checking! It is up to the user
                   to supply non-null parameters as source & destination and size
                   that actually fits into the destination buffer.
   *//***************************************************************************/
   void * MemCpy8(void* pDst,void* pSrc, uint32_t size);
   
   /**************************************************************************//**
    @Function      MemSet8
   
    @Description   Sets all bytes of a memory buffer to a specific value byte by byte.
   
    @Param[in]     pDst    - The address of the destination buffer.
    @Param[in]     c       - Value to set destination bytes to.
    @Param[in]     size    - The number of bytes that will be set to val.
   
    @Return        pDst (the address of the destination buffer).
   
    @Cautions      There is no parameter or boundary checking! It is up to the user
                   to supply non null parameter as destination and size
                   that actually fits into the destination buffer.
   *//***************************************************************************/
   void * MemSet8(void* pDst, int c, uint32_t size);
   
   /** @} */ /* end of mem_cpy group */
   /** @} */ /* end of etc_id group */
   
   
   #endif /* __MEMCPY_EXT_H */

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