sys_dma_it.c

手机GSM TI 平台 dma 驱动 源代码

/*                @(#) nom : sys_dma_it.c SID: 1.2 date : 05/23/03            */
/* Filename:      sys_dma_it.c                                                */
/* Version:       1.2                                                         */
/******************************************************************************
 *                   WIRELESS COMMUNICATION SYSTEM DEVELOPMENT
 *
 *             (C) 2002 Texas Instruments France. All rights reserved
 *
 *                          Author : Guillaume Leterrier
 *                                   Francois Amand
 *
 *
 *  Important Note
 *  --------------
 *
 *  This S/W is a preliminary version. It contains information on a product 
 *  under development and is issued for evaluation purposes only. Features 
 *  characteristics, data and other information are subject to change.
 *
 *  The S/W is furnished under Non Disclosure Agreement and may be used or
 *  copied only in accordance with the terms of the agreement. It is an offence
 *  to copy the software in any way except as specifically set out in the 
 *  agreement. No part of this document may be reproduced or transmitted in any
 *  form or by any means, electronic or mechanical, including photocopying and
 *  recording, for any purpose without the express written permission of Texas
 *  Instruments Inc.
 *
 ******************************************************************************
 *
 *  FILE NAME: sys_dma_it.c
 *
 *
 *  PURPOSE:  Interruption DMA drivers for CALYPSO PLUS.
 *    
 *
 *
 *  FILE REFERENCES:
 *
 *  Name                  IO      Description
 *  -------------         --      ---------------------------------------------
 *  
 *
 *
 *  EXTERNAL VARIABLES:
 *
 *  Source:
 *
 *  Name                  Type              IO   Description
 *  -------------         ---------------   --   ------------------------------
 *
 *
 *
 *  EXTERNAL REFERENCES:
 *
 *  Name                Description
 *  ------------------  -------------------------------------------------------
 *
 *
 *
 *  ABNORMAL TERMINATION CONDITIONS, ERROR AND WARNING MESSAGES:
 *  
 *
 *
 *  ASSUMPTION, CONSTRAINTS, RESTRICTIONS:
 *  
 *
 *
 *  NOTES:
 *  
 *
 *
 *  REQUIREMENTS/FUNCTIONAL SPECIFICATION REFERENCES:
 *
 *
 *
 *
 *  DEVELOPMENT HISTORY:
 *
 *  Date         Name(s)         Version  Description
 *  -----------  --------------  -------  -------------------------------------
 *  23-Oct-2002  G.Leterrier    0.0.1    First implementation
 *
 *  ALGORITHM: 
 *
 *
 *****************************************************************************/

#include "chipset.cfg"

#if (CHIPSET == 12)

    #include "dma/sys_dma.h"


    /*****************************************************************************/
    /* global variable definition */
    /***************************************************************************/


     /* Array of pointer on call back function with argument SYS_UWORD16. */
    /* This argument is the value of the status IT register of the channel which has generated the IT event. */
    /* The size of the array is defined by the number of DMA channel available on the device */



    T_DMA_CALL_BACK pf_dma_call_back_address[C_DMA_NUMBER_OF_CHANNEL]=
          {f_dma_default_call_back_it,
          f_dma_default_call_back_it,
          f_dma_default_call_back_it,
          f_dma_default_call_back_it,
          f_dma_default_call_back_it,
          f_dma_default_call_back_it,
          };



    /******************************************************************************
    *
    *  FUNCTION NAME:f_dma_interrupt_manager
    *    The function is called when a DMA interrupt event occurs on the ARM interrupt handler. 
    *
    *  ARGUMENT LIST:
    *
    *  Argument     Type         IO  Description
    *  ----------   ----------   --  -------------------------------------------
    *  none
    *
    *
    * RETURN VALUE: none
    *
    *****************************************************************************/
    void f_dma_interrupt_manager(void)
         {

         SYS_UWORD16 d_dma_isr;
         SYS_UWORD8  d_dma_index=0;
        /* MASK to eliminate interruption from channel allocation to DSP and secure channel allocated to ARM */
        d_dma_isr=C_DMA_ISR_REG & (~C_DMA_CAR_REG) & (~C_DMA_SCR_REG);    



        /* shift ISR register from channel 0 to channel n in order to determine the channel with interrrupt active*/

        for (d_dma_index;d_dma_index<C_DMA_NUMBER_OF_CHANNEL;d_dma_index++)  /* end condition need to be checked */
            {
            if ((d_dma_isr & 0x0001)==1)
              { 
              pf_dma_call_back_address[d_dma_index](F_DMA_GET_CHANNEL_IT_STATUS(d_dma_index));
              } /* JUMP to the call back function with the status register in argument */
            d_dma_isr >>=1;
            }

        }


    /******************************************************************************
    *
    *  FUNCTION NAME:f_dma_secure_interrupt_manager
    *    The function is called when a secure DMA interrupt event occurs on the ARM interrupt handler. 
    *
    *  ARGUMENT LIST:
    *
    *   Argument     Type         IO  Description
    *  ----------   ----------   --  -------------------------------------------
    *  none
    *
    *
    * RETURN VALUE: none
    *
    *****************************************************************************/
    void f_dma_secure_interrupt_manager(void)
        {

        SYS_UWORD16 d_dma_isr;
        SYS_UWORD8  d_dma_index=0;
        /* MASK to eliminate interruption from channel allocation to DSP and non-secure channel allocated to ARM */
        d_dma_isr=C_DMA_ISR_REG & (~C_DMA_CAR_REG) & (C_DMA_SCR_REG);      

        /* shift ISR register from channel 0 to channel n in order to determine the channel with interrrupt active*/

        for (d_dma_index;d_dma_index<C_DMA_NUMBER_OF_CHANNEL;d_dma_index++)  /* end condition need to be checked */
            {
            if ((d_dma_isr & 0x0001)==1) 
              { 
              pf_dma_call_back_address[d_dma_index](F_DMA_GET_CHANNEL_IT_STATUS(d_dma_index));
              } /* JUMP to the call back function with the status register in argument */
            d_dma_isr >>=1;
            }

        } 


    /******************************************************************************
   *
   *  FUNCTION NAME:f_dma_default_call_back_it
   *    The address of that function will be called by default
   *    by the DMA interrupt handler, if no call-back function has been defined yet on this channel
   *
   *  ARGUMENT LIST:
   *
   *  Argument          Type         IO  Description
   *  ----------        ----------   --  -------------------------------------------
   *  d_dma_channel_status_it  SYS_UWORD16    I    contains a default IT status of the channel from which the event occurs.
   *
   *
   * RETURN VALUE: none
   *
   *****************************************************************************/
    void f_dma_default_call_back_it(SYS_UWORD16 d_dma_channel_it_status)
        {
        }
    





  #endif /* (CHIPSET == 12) */