fdi_spll.c

来自「Flash file system」· C语言 代码 · 共 1,894 行 · 第 1/5 页

   if (size == 0)
   {
      return HW_ERR_NONE;
   }


   /* align addresses & determine buffer offset */
   dst_data_ptr = (FLASH_DATA_PTR) ALIGN_ADDRESS(dst_address);
   dst_offset   = UNALIGNED_BYTES(dst_address);
   dst_byte_ptr = (BYTE_PTR) temp_buffer + dst_offset;
   data_size    = BUFFER_SIZE - dst_offset;
   src_byte_ptr = (BYTE_PTR) src_address;


   /* take flash write mutex and perform hardware precondition */
   SEM_MTX_WAIT(SEM_FlashWrite);
   HARDWARE_PRECONDITION;

   while ((size > 0) && (status == HW_ERR_NONE))
   {
      /**/
      byte_size = GET_MIN(data_size, size);
      data_size = (byte_size + dst_offset + sizeof(FLASH_DATA) - 1) /
                  sizeof(FLASH_DATA);

      /**/
      if (byte_size != BUFFER_SIZE)
      {
         /*temp_buffer[0] = ALL_F;*/
         /*temp_buffer[data_size] = ALL_F;*/
         MemorySet((BYTE_PTR) temp_buffer, 0xff, BUFFER_SIZE);
      }
      MemoryMove(dst_byte_ptr, src_byte_ptr, (WORD) byte_size);

      /* data_size = (byte_size + dst_offset + sizeof(FLASH_DATA) - 1) /
                  sizeof(FLASH_DATA); */

      /* write buffer */
      do
      {
#if (TIME_MONITOR_ENABLED == TRUE)
         TIME_MONITOR(key0, key1);
#else
         DISABLE_INTERRUPTS(key0, key1);
#endif
         status = PtrLowLvlWrite(dst_data_ptr, temp_buffer, data_size);
         ENABLE_INTERRUPTS(key0, key1);
      } while ((status == HW_ERR_SUSPEND) || (status == HW_ERR_ABORT));

      /* update pointers/variables */
      dst_data_ptr += data_size;
      dst_byte_ptr = (BYTE_PTR) temp_buffer;
      src_byte_ptr += byte_size;
      size -= byte_size;
      data_size = BUFFER_SIZE;
      dst_offset = 0;
   }

   /* perform hardware postcondition, post flash write mutex, and return */
   HARDWARE_POSTCONDITION;
   SEM_MTX_POST(SEM_FlashWrite);
   return status;
}



#else /* BUFFER_SIZE == 0 */
/*#############################################################################
  ### FlashDevCopy
  ###
  ### DESCRIPTION:
  ###   This function is used to copy valid data during reclaim and during
  ###   updates to copy data that is not changing.  The Background Manager,
  ###   Reclaim Task, and Code Manager determine the relative address by
  ###   using the FDI mapping structures.  This function reads and writes
  ###   data by calling FlashDevRead() and FlashDevWrite().
  ###
  ### PARAMETERS:
  ###    IN:  dst_address (DWORD) - The starting address within flash to copy
  ###          data to.
  ###         src_address (DWORD) - The starting address within flash to read
  ###          the data from.
  ###         size (DWORD) - The amount of data, in bytes, to copy.
  ###
  ### RETURNS:
  ###   If the source and destination buffers do not lie entirely within the
  ###   data managed area (or code managed area if DAV is enabled), the
  ###   function returns HW_ERR_PARAM.  If an error occurred while writing
  ###   to the flash hardware, the function returns HW_ERR_WRITE.  Finally,
  ###   if all parameters are within the appropriate ranges and the buffer
  ###   was successfully copied, the funciton returns HW_ERR_NONE.
  ###
 */

HW_ERROR FlashDevCopy(DWORD dst_address, DWORD src_address, DWORD size)
{
   FLASH_DATA_PTR src_data_ptr, dst_data_ptr;
   BYTE_PTR       src_byte_ptr, dst_byte_ptr;
   DWORD          src_offset,   dst_offset;

   DWORD init_unaligned_bytes;
   DWORD key0, key1;
   FLASH_DATA temp_data;
   HW_ERROR status = HW_ERR_NONE;


   /* power loss simulation for testing purposes */
   mDEBUG_PLR_SIMULATION(size);

   /* address validation */
   dst_address += LOWLVL_FLASH_START_ADDRESS;
   VALIDATE_ADDRESS(dst_address, size);
   src_address += LOWLVL_FLASH_START_ADDRESS;
   VALIDATE_ADDRESS(src_address, size);

   /* return if nothing to write */
   if (size == 0)
   {
      return HW_ERR_NONE;
   }

   /* align addresses & determine address offset */
   dst_data_ptr = (FLASH_DATA_PTR) ALIGN_ADDRESS(dst_address);
   src_offset   = UNALIGNED_BYTES(src_address);
   dst_offset   = UNALIGNED_BYTES(dst_address);
   dst_byte_ptr = (BYTE_PTR) &temp_data + dst_offset;

   /* calculate the number of initial unaligned bytes */
   if (src_offset == dst_offset)
   {
      if (dst_offset == 0)
      {
         init_unaligned_bytes = 0;
      }
      else
      {
         init_unaligned_bytes = GET_MIN(size, sizeof(FLASH_DATA) - dst_offset);
      }
   }
   else
   {
      init_unaligned_bytes = size;
   }
   size -= init_unaligned_bytes;

   /* take flash write mutex and perform hardware precondition */
   SEM_MTX_WAIT(SEM_FlashWrite);
   HARDWARE_PRECONDITION;

   /*
    * write initial unaligned data, or all data if source and destination
    * addresses do not have the same offset
    */
   src_byte_ptr = (BYTE_PTR) src_address;
   while ((init_unaligned_bytes > 0) && (status == HW_ERR_NONE))
   {
      /* fill temp buffer with data */
      /* temp_data = ALL_F; */ /* commented by jjs - replaced with the following two IFs*/
	  if(dst_offset != 0) /* added by jjs */
	  {
		  MemoryMove((BYTE_PTR)(&temp_data), (BYTE_PTR)dst_data_ptr, dst_offset);
	  }
      while ((dst_offset < sizeof(FLASH_DATA)) && (init_unaligned_bytes > 0))
      {
         *dst_byte_ptr = *src_byte_ptr;
         dst_byte_ptr++;
         src_byte_ptr++;
         init_unaligned_bytes--;
         dst_offset++;
      }
	  if(dst_offset < sizeof(FLASH_DATA)) /* added by jjs */
	  {
		  MemoryMove((BYTE_PTR)dst_byte_ptr, 
					 ((BYTE_PTR)dst_data_ptr) + dst_offset,
					 sizeof(FLASH_DATA) - dst_offset);
	  }

      /* write to flash */
      do
      {
#if (TIME_MONITOR_ENABLED == TRUE)
         TIME_MONITOR(key0, key1);
#else
         DISABLE_INTERRUPTS(key0, key1);
#endif
         status = PtrLowLvlWrite(dst_data_ptr, &temp_data);
         ENABLE_INTERRUPTS(key0, key1);
      } while (status == HW_ERR_SUSPEND);

      /* update pointers */
      dst_data_ptr++;
      dst_offset = 0;
      dst_byte_ptr = (BYTE_PTR) &temp_data;
   }


   /* write aligned data */
   src_data_ptr = (FLASH_DATA_PTR) src_byte_ptr;
   while ((size >= sizeof(FLASH_DATA)) && (status == HW_ERR_NONE))
   {
      /* write to flash */
      do
      {
         temp_data = *src_data_ptr;

#if (TIME_MONITOR_ENABLED == TRUE)
         TIME_MONITOR(key0, key1);
#else
         DISABLE_INTERRUPTS(key0, key1);
#endif
         status = PtrLowLvlWrite(dst_data_ptr, &temp_data);
         ENABLE_INTERRUPTS(key0, key1);
      } while (status == HW_ERR_SUSPEND);

      /* update pointers */
      dst_data_ptr++;
      src_data_ptr++;
      size -= sizeof(FLASH_DATA);
   }

   /* write remaining unaligned bytes */
   if ((size > 0) && (status == HW_ERR_NONE))
   {
      src_byte_ptr = (BYTE_PTR) src_data_ptr;
      dst_byte_ptr = (BYTE_PTR) &temp_data;

      /* temp_data = ALL_F; */ /* commented by jjs */

	  MemoryMove((BYTE_PTR)dst_byte_ptr + size, 
				 ((BYTE_PTR)dst_data_ptr) + size, 
				 sizeof(FLASH_DATA) - size); /* added by jjs */

      /* fill temp buffer with data */
      while (size > 0)
      {
         *dst_byte_ptr = *src_byte_ptr;
         dst_byte_ptr++;
         src_byte_ptr++;
         size--;
      }

      /* write to flash */
      do
      {
#if (TIME_MONITOR_ENABLED == TRUE)
         TIME_MONITOR(key0, key1);
#else
         DISABLE_INTERRUPTS(key0, key1);
#endif
         status = PtrLowLvlWrite(dst_data_ptr, &temp_data);
         ENABLE_INTERRUPTS(key0, key1);
      } while (status == HW_ERR_SUSPEND);
   }

   /* perform hardware postcondition, post flash write mutex, and return */
   HARDWARE_POSTCONDITION;
   SEM_MTX_POST(SEM_FlashWrite);
   return status;
}
#endif /* BUFFER_SIZE */
/* E5.0.480 END */



/*#############################################################################
  ### FlashDevRead
  ###
  ### DESCRIPTION:
  ###   Fills the specified buffer with the number of bytes defined by 'size'
  ###   from the device's absolute physical address.  The Background Manager,
  ###   Reclaim Task, and Foreground Manager determine the relative address
  ###   by using the FDI mapping structure.  The FlashDevRead() function
  ###   translates the relative address into a physical system address and
  ###   verifies the address range.  The function reads the data into the
  ###   buffer and returns the appropriate value.
  ###
  ### PARAMETERS:
  ###    IN:  buffer_ptr (BYTE_PTR) - The buffer to use while reading data.
  ###         address (DWORD) - The starting address within flash to read from.
  ###         size (DWORD) - The amount of data, in bytes, to read.
  ###    OUT: buffer_ptr - Contains the contents read.
  ###
  ### RETURNS:
  ###   If the entire source buffer does not lie within the data managed area
  ###   (or code managed area if DAV is enabled), the function returns
  ###   HW_ERR_PARAM.  Otherwise, the function returns HW_ERR_NONE.
  ###
 */

HW_ERROR FlashDevRead(BYTE_PTR buffer_ptr, DWORD address, DWORD size)
{
   BYTE_PTR       src_byte_ptr, dst_byte_ptr;
   FLASH_DATA_PTR src_data_ptr, dst_data_ptr;
   DWORD          src_offset,   dst_offset;


   /* validate address */
   address += LOWLVL_FLASH_START_ADDRESS;
   VALIDATE_ADDRESS(address, size);

   /* return if nothing to read */
   if (size == 0)
   {
      return HW_ERR_NONE;
   }

   /* determine address offsets */
   src_offset = UNALIGNED_BYTES(address);
   dst_offset = UNALIGNED_BYTES((DWORD) buffer_ptr);
   src_byte_ptr = (BYTE_PTR) address;
   dst_byte_ptr = buffer_ptr;

   /*
    * determine if source and destination addresses allow the reading on
    * aligned addresses
    */
   if ((src_offset == dst_offset) && (size > sizeof(FLASH_DATA)))
   {
      /* read initial unaligned bytes */
      if (src_offset != 0)
      {
         while (src_offset < sizeof(FLASH_DATA))
         {
            *dst_byte_ptr = *src_byte_ptr;
            dst_byte_ptr++;
            src_byte_ptr++;
            size--;
            src_offset++;
         }
      }

      /* read aligned data */
      dst_data_ptr = (FLASH_DATA_PTR) dst_byte_ptr;
      src_data_ptr = (FLASH_DATA_PTR) src_byte_ptr;
      while (size >= sizeof(FLASH_DATA))
      {
         *dst_data_ptr = *src_data_ptr;
         dst_data_ptr++;
         src_data_ptr++;
         size -= sizeof(FLASH_DATA);
      }

      /* read remaining unaligned bytes */
      if (size > 0)
      {
         dst_byte_ptr = (BYTE_PTR) dst_data_ptr;
         src_byte_ptr = (BYTE_PTR) src_data_ptr;

         while (size > 0)
         {
            *dst_byte_ptr = *src_byte_ptr;
            dst_byte_ptr++;
            src_byte_ptr++;
            size--;
         }
      }
   }

   /*
    * source and destination addresses do not allow the reading on aligned
    * addresses; therefore, a byte-by-byte copy needs to be done
    */
   else
   {
      while (size > 0)
      {
         *dst_byte_ptr = *src_byte_ptr;
         dst_byte_ptr++;
         src_byte_ptr++;
         size--;
      }
   }

   return HW_ERR_NONE;
}



#if (CONSISTENT_ACCESS_TIME == TRUE)