example.c

motorola 针对coldfire 5275 评估板的Dbug bootloader源程序

/*
 * File:        example.c
 * Purpose:     Template for <project>.c which contains the board-specific
 *              routines that are required by dBUG
 *
 * Notes:
 *
 */

#include "src/include/dbug.h"

#ifdef DBUG_NETWORK
/* put network specific includes/defines here */
#endif

/********************************************************************/
/* 
 * Global BSP variables referenced by dBUG 
 */
const char BRD_STR[]        = "EXAMPLE";
const int  BRD_VER_MAJOR    = 1;
const char BRD_VER_MINOR    = 'a';
const char COPYRIGHT2[]     = "";

/********************************************************************/
void
board_init (void)
{
    extern REGISTERS context;

    /* 
     * Good for detecting NULL dereferences 
     */
    *(ADDRESS *)(0) = 0;

    /*
     * Set dBUG user stack to top of SDRAM
     */ 
    context.a7 = (SDRAM_ADDRESS + SDRAM_SIZE);
}

/********************************************************************/
void
board_init2 (void)
{
    /* More board-specific initialization here */   
}

/********************************************************************/
void
board_init3 (void)
{
    /* More board-specific initialization here */   
}

/********************************************************************/
char
board_getchar (void)
{
    return CHARACTER_INPUT;
}

/********************************************************************/
void
board_putchar (char ch)
{
    CHARACTER_OUTPUT(ch);
}

/********************************************************************/
int
board_getchar_present (void)
{
    return TEST_FOR_CHAR_INPUT;
}

/********************************************************************/
void
board_putchar_flush (void)
{
    FLUSH_CHARACTER_OUTPUT;
}

/********************************************************************/
int
board_dlio_init (void)
{
#ifdef DBUG_NETWORK
    /*  
     * Download initialization routine 
     */
#endif
    return TRUE;
}

/********************************************************************/
void
board_dlio_done (void)
{
#ifdef DBUG_NETWORK
    /*
     * Download complete, clean up
     */
#endif
}

/********************************************************************/
int
board_dlio_getchar (void)
{
    /* Download character input routine */
    int ch;
 
    switch (uif_dlio)
    {
#ifdef DBUG_NETWORK
        case UIF_DLIO_NETWORK:
            ch = tftp_in_char();
            break;
#endif
        case UIF_DLIO_CONSOLE:
        default:
            ch = board_getchar();
            break;
    }
    return ch;
}
 
/********************************************************************/
int
board_dlio_vda (ADDRESS addr)
{
    /*  Determines if the given address is valid for downloads */

    if (((addr >= USER_SPACE) && 
            (addr < SDRAM_SIZE))
        || ((addr >= EXT_SRAM_ADDRESS) &&
            (addr < (EXT_SRAM_ADDRESS + EXT_SRAM_SIZE)))
        || ((addr >= SRAM_ADDRESS) && 
            (addr < (SRAM_ADDRESS + SRAM_SIZE))))
        return 1;
    else
        return 0;
}

/********************************************************************/
#ifdef DBUG_NETWORK
int
board_dlio_filetype (char *filename, char *ext)
{
    (void)filename;
    (void)ext;

    return UIF_DLIO_UNKNOWN;
}
#endif

/********************************************************************/
void
board_reset (void)
{
    /*
     * Initiate software reset
     */
}

/********************************************************************/
void
board_irq_enable (void)
{
    /*
     * Enable Interrupts
     */
}

/********************************************************************/
void
board_irq_disable (void)
{
    /*
     * Disable Interrupts
     */
}
/********************************************************************/