kev75401_relocate_init.c

sharp s Lh75401 PWM audio的例子

/*********************************************************************** 
 * $Workfile:   board_relocate_init.c  $ 
 * $Revision:   1.0  $ 
 * $Author:   AnvikE  $ 
 * $Date:   Jul 03 2003 17:32:14  $ 
 * 
 * Project:     kev75401 BSP (board support package)
 * 
 * Description: 
 *  
 * 
 * Revision History: 
 * $Log:
 *********************************************************************** 
 * 
 *  Copyright (c) 2002 Sharp Microelectronics of the Americas 
 * 
 *  All rights reserved 
 * 
 *  SHARP MICROELECTRONICS OF THE AMERICAS MAKES NO REPRESENTATION 
 *  OR WARRANTIES WITH RESPECT TO THE PERFORMANCE OF THIS SOFTWARE, 
 *  AND SPECIFICALLY DISCLAIMS ANY RESPONSIBILITY FOR ANY DAMAGES, 
 *  SPECIAL OR CONSEQUENTIAL, CONNECTED WITH THE USE OF THIS SOFTWARE. 
 * 
 *  SHARP MICROELECTRONICS OF THE AMERICAS PROVIDES THIS SOFTWARE SOLELY 
 *  FOR THE PURPOSE OF SOFTWARE DEVELOPMENT INCORPORATING THE USE OF A 
 *  SHARP MICROCONTROLLER OR SYSTEM-ON-CHIP PRODUCT. USE OF THIS SOURCE 
 *  FILE IMPLIES ACCEPTANCE OF THESE CONDITIONS. 
 * 
 **********************************************************************/

#include "kev75401_relocate.h"

/* external linker symbols - see crt0 for details */

/* first load region */
extern int load_sram_base; 
/* first text section */
extern int text_sram_start;
extern int text_sram_end;
/* first data section */
extern int data_sram_start;
extern int data_sram_end;
/* first bss section */
extern int bss_sram_start;
extern int bss_sram_end;

/* second load region */
extern int load_fram_base; 
/* second text section */
extern int text_fram_start;
extern int text_fram_end;
/* second data section */
extern int data_fram_start;
extern int data_fram_end;
/* second bss section */
extern int bss_fram_start;
extern int bss_fram_end;

/************************************************************************
*
* Function: relocate_init
*
* Purpose:
*    Sets up the segment table - note this is defined by the user.
*
* Processing:
*     
* Parameters: 
*     None
*
* Outputs: 
*     None
*
* Returns: 
*     None
*
* Notes:
*     see the linker script for section details. 
*
************************************************************************/

void relocate_init (void)
{
    SECTIONS_T sections;
    int* dst = (int*)TBUF_ADDR;
    int* end = (int*)(TBUF_ADDR+sizeof(sections));
    int* src = (int*)&sections;

    /* Set up the section for the first text region */
    sections.text[0].load_baddr = load_sram_base;
    sections.text[0].exec_baddr = text_sram_start;
    sections.text[0].exec_eaddr = text_sram_end;

    /* Set up the section for the first data region */
    sections.data[0].load_baddr = load_sram_base+
        (data_sram_start-text_sram_start);
    sections.data[0].exec_baddr = data_sram_start;
    sections.data[0].exec_eaddr = data_sram_end;

    /* Set up the section for the first bss region */
    sections.bss[0].exec_baddr = bss_sram_start;
    sections.bss[0].exec_eaddr = bss_sram_end;

    /* Set up the section for the second text region */
    sections.text[1].load_baddr = load_fram_base;
    sections.text[1].exec_baddr = text_fram_start;
    sections.text[1].exec_eaddr = text_fram_end;

    /* Set up the section for the second data region */
    sections.data[1].load_baddr = load_fram_base+
        (data_fram_start-text_fram_start);
    sections.data[1].exec_baddr = data_fram_start;
    sections.data[1].exec_eaddr = data_fram_end;

    /* Set up the section for the second bss region */
    sections.bss[1].exec_baddr = bss_fram_start;
    sections.bss[1].exec_eaddr = bss_fram_end;

    /* copy the config structure to a temporary memory location */
    mmove (dst, end, src);
}

/* EOF */