csl_emifgetbaseaddress.c

TI达芬奇dm644x各硬件模块测试代码

/*  ============================================================================
 *   Copyright (c) Texas Instruments Inc 2002, 2003, 2004, 2005                 
 *                                                                              
 *   Use of this software is controlled by the terms and conditions found in the
 *   license agreement under which this software has been supplied.             
 *   ===========================================================================
 */

/** @file csl_emifGetBaseAddress.c
 *
 *    @brief File for functional layer of CSL API @a CSL_emifGetBaseAddress()
 *
 *   Path: \\(CSLPATH)\\soc\\davinci\\arm9\\src
 *
 *  Description
 *    - The @a CSL_emifGetBaseAddress() function definition & it's associated functions
 *
 */
 
/* =============================================================================
 *  Revision History
 *  ===============
 *  30-Aug-2004 brn File Created.
 *  11-Oct-2004 brn File updated with the code review comments
 * =============================================================================
 */

#include <csl_emif.h>

/** ============================================================================
 *   @n@b CSL_emifGetBaseAddress
 *
 *   @b Description
 *   @n  This function gets the base address of the given External memory 
 *       interface instance. 
 *
 *   @b Arguments
 *   @verbatim      
            emifNum         Specifies the instance of the external memory 
                            interface to be opened.
 
            pEmifParam      external memory interface module specific parameters

            pBaseAddress    Pointer to base address structure containing base 
                            address details.
            
     @endverbatim
 *
 *   <b> Return Value </b>  CSL_Status
 *   @li                    CSL_OK            Open call is successful
 *   @li                    CSL_ESYS_FAIL     external memory interface instance 
 *                                            is not available.
 *
 *   <b> Pre Condition </b>
 *   @n  None
 *
 *   <b> Post Condition </b>
 *   @n  Base address structure is populated
 *
 *   @b Modifies
 *   @n    1. The status variable
 *
 *         2. Base address structure is modified.
 *
 *   @b Example
 *   @verbatim
        CSL_Status            status;
        CSL_EmifBaseAddress    baseAddress;

        ...
        
        status = CSL_emifGetBaseAddress(CSL_EMIF, NULL, &baseAddress);
        
        ...
        
    @endverbatim
 * ===========================================================================
 */
#pragma CODE_SECTION (CSL_emifGetBaseAddress, ".text:csl_section:emif");
CSL_Status CSL_emifGetBaseAddress (
    CSL_InstNum             emifNum,
    CSL_EmifParam           *pEmifParam,
    CSL_EmifBaseAddress     *pBaseAddress 
)
{
    CSL_Status status = CSL_SOK;
    
    /* Added the code with the review comments */
    *pEmifParam         = *pEmifParam;
    if(pBaseAddress == NULL) {
        status = CSL_ESYS_INVPARAMS;
    }

    switch (emifNum) {
    case CSL_EMIF:
        pBaseAddress->regs = (CSL_EmifRegsOvly)CSL_EMIF_1_REGS;
        break;
    
    default:
        pBaseAddress->regs = (CSL_EmifRegsOvly)NULL;
        status = CSL_ESYS_FAIL;
        break;
    }

    return status;
}