flash.c

来自「eCos操作系统源码」· C语言 代码 · 共 574 行 · 第 1/2 页

int clear_all_lock_bits(ADDR addr)
{
    void *err_addr;
    int stat;

    if ((stat = flash_unlock((void *)0, eeprom_size, (void **)&err_addr)) != 0)
	return stat;
    return OK;
}


/********************************************************/
/* ERASE EEPROM						*/
/*							*/
/* returns OK if erase was successful,			*/
/* otherwise returns ERROR				*/
/* and sets cmd_stat to an error code			*/
/*							*/
/********************************************************/
int erase_eeprom(ADDR addr, unsigned long length)
{
    void *err_addr;
    int num_blocks;

    /********************************************************/
    /* The 28F640J3A is divided into 64, 128Kbyte blocks    */
    /* each of which must be individually erased.	    */
    /* This routine and erases a whole number of blocks     */
    /********************************************************/

    /* don't erase boot area even if entire eeprom is specified */
    if (addr == NO_ADDR) {
	addr = FLASH_BLK4_BASE_ADDR;
	length = eeprom_size - RESERVED_AREA_SIZE;
    }

    if (length == 0) {
	/* 10/06/00 */
	printf( "erase_eeprom, return OK, length=0\n");
	return OK;
    }

    /* start address must be block-aligned */
    if ((addr % FLASH_BLOCK_SIZE) != 0)	{
	cmd_stat = E_EEPROM_ADDR;
	printf( "erase_eeprom, addr = 0x%x\n", addr);
	printf( "erase_eeprom, FLASH_BLOCK_SIZE = 0x%x\n", FLASH_BLOCK_SIZE);
	printf( "erase_eeprom, return ERR, (addr %% FLASH_BLOCK_SIZE) = %d\n", addr % FLASH_BLOCK_SIZE);

	return ERR;
    }

    /* figure out how many blocks require erasure - round up using integer division */
    if (length % FLASH_BLOCK_SIZE)		/* non-multiple, round up */
	num_blocks = (length + FLASH_BLOCK_SIZE) / FLASH_BLOCK_SIZE;
    else					/* multiple number of blocks */
	num_blocks = length / FLASH_BLOCK_SIZE;

    if (eeprom_size == 0) {
	cmd_stat = E_NO_FLASH;
	return ERR;
    }

    if (flash_erase((void *)addr, num_blocks * FLASH_BLOCK_SIZE, (void **)&err_addr) != 0) {
	cmd_stat = E_EEPROM_FAIL;
	return ERR;
    }

    return OK;
}


/********************************************************/
/* WRITE EEPROM                				*/
/*                     					*/
/* returns OK if successful; otherwise returns ERROR    */
/* and sets cmd_stat to an error code		 	*/
/*							*/
/********************************************************/
int
write_eeprom(ADDR start_addr, const void *data_arg, int data_size)
{
    void *err_addr;

    if (flash_program((void *)start_addr, data_arg, data_size, &err_addr) != 0) {
	cmd_stat = E_EEPROM_FAIL;
	return ERR;
    }
    return OK;
}


/*****************************************************************************
*
* flash_test - System Flash ROM diagnostics
*
* A destructive Flash ROM Read/Write test.  Note that the area of Flash
* which is tested changes based on whether the diagnostic is being invoked
* from the System code or from the Factory code (can't write over MON960).
*
* This test basically does a Longword Address test to the Flash area.
*
*/
void flash_test(MENU_ARG arg)
{

    ADDR start_addr = (ADDR)FLASH_ADDR;	/* Original */

    int i;
    unsigned long *f_ptr = (unsigned long *)FLASH_ADDR;
    int bytes_written = 0;
    unsigned long flash_data;
    char answer[20];

/* 10/31/00 */
    int status;

    init_eeprom();

    printf("***********************************\n");
    printf("***           WARNING           ***\n");
    printf("*** This test is destructive to ***\n");
    printf("*** all contents of the FLASH!  ***\n");
    printf("***********************************\n");

    printf("\nDo you wish to continue? (y/n)\n");
    sgets(answer);
    printf("\n\n");
    if ((answer[0] != 'y') && (answer[0] != 'Y'))
	return; 

    printf ("FLASH begins at 0x%X\n", FLASH_ADDR);
    printf ("Total FLASH size = 0x%X\n\n", eeprom_size);
    printf ("Checking FLASH ...\n");
    if (check_eeprom(NO_ADDR, 0) == OK)
        printf("FLASH is erased\n\n");
    else
        printf("FLASH is programmed between 0x%X and 0x%X\n\n",
                eeprom_prog_first, eeprom_prog_last);

    printf ("\nClearing Block Lock Bits... \n");
    if(clear_all_lock_bits(NO_ADDR)==OK)
        printf("Done!\n\n");
    else
        printf("Error!\n\n");
	
    printf ("Erasing FLASH...\n");
    if (erase_eeprom(NO_ADDR, 0) != OK)
        printf("Error on erase_eeprom()\n\n");
    else
        printf("Done Erasing FLASH!\n\n");
 
    (ADDR)start_addr = (ADDR)FLASH_BLK4_BASE_ADDR;

    printf ("Writing Longword Data to FLASH...\n");
 
    /* write to all of available Flash ROM.  Don't do this thousands of times
       since the Flash has only 100,000 write cycles in its lifespan */

    while (bytes_written < (eeprom_size - RESERVED_AREA_SIZE)) {
	flash_data = (unsigned long)start_addr;
    	for (i=0; i<TEST_BUF_LONGS; i++) {
            flash_buffer[i] = flash_data;	/* put address in buffer */
	    flash_data += 4;			/* increment address     */
	}
        if (write_eeprom (start_addr, (void *)flash_buffer, TEST_BUF_CHARS) != OK) {
            printf("Error on write_eeprom()\n");
            goto finish;
        }
        start_addr = (unsigned long)start_addr + TEST_BUF_CHARS;
        bytes_written += TEST_BUF_CHARS;
    }

    printf ("Write Complete, Verifying Data...\n");
    bytes_written = 0;
 
    f_ptr = (unsigned long *)FLASH_BLK4_BASE_ADDR;
    
    while (bytes_written < (eeprom_size - RESERVED_AREA_SIZE)) {
        if (*f_ptr != (unsigned long)f_ptr) {
            printf ("Data verification error at 0x%X\n", (unsigned long)f_ptr);
            printf ("Expected 0x%X Got 0x%X\n", (unsigned long)f_ptr, *f_ptr);
            goto finish;
        }
        f_ptr++;
        bytes_written += 4;
    }
    printf ("Done Verifying Longword Data!\n\n");

    printf ("Checking FLASH...\n");
    if (check_eeprom(NO_ADDR, 0) == OK)
        printf("FLASH is erased\n\n");
    else
        printf("FLASH is programmed between 0x%X and 0x%X\n\n",
                eeprom_prog_first, eeprom_prog_last);

    printf ("Erasing FLASH...\n");
    if (erase_eeprom(NO_ADDR, 0) != OK)
        printf("Error on erase_eeprom()\n\n");
    else
        printf("Done Erasing FLASH!\n\n");

    printf ("Checking FLASH...\n");
    if (check_eeprom(NO_ADDR, 0) == OK)
        printf("FLASH is erased\n\n");
    else
        printf("FLASH is programmed between 0x%X and 0x%X\n\n",
	       eeprom_prog_first, eeprom_prog_last);

    /* reinitialize variables */
    bytes_written = 0;
 
    start_addr = (ADDR)FLASH_BLK4_BASE_ADDR;
    f_ptr = (unsigned long *)FLASH_BLK4_BASE_ADDR;

    printf ("Writing Inverted Longword Data to FLASH...\n");
 
    /* write to all of available Flash ROM.  Don't do this thousands of times
       since the Flash has only 100,000 write cycles in its lifespan */

    while (bytes_written < (eeprom_size - RESERVED_AREA_SIZE)) {
	flash_data = (unsigned long)start_addr;
    	for (i=0; i<TEST_BUF_LONGS; i++) {
            flash_buffer[i] = ~flash_data;	/* put address BAR in buffer */
	    flash_data += 4;			/* increment address     */
	}
        if (write_eeprom (start_addr, (void *)flash_buffer, TEST_BUF_CHARS) != OK) {
            printf("Error on write_eeprom()\n");
            goto finish;
        }
        start_addr = (unsigned long)start_addr + TEST_BUF_CHARS;
        bytes_written += TEST_BUF_CHARS;
    }
 
    printf ("Write Complete, Verifying Data...\n");
    bytes_written = 0;
 
    while (bytes_written < (eeprom_size - RESERVED_AREA_SIZE)) {
        if (*f_ptr != (~(unsigned long)f_ptr)) {
            printf ("Data verification error at 0x%X\n", (unsigned long)f_ptr);
            printf ("Expected 0x%X Got 0x%X\n", (~(unsigned long)f_ptr), *f_ptr);
            goto finish;
        }
        f_ptr++;
        bytes_written += 4;
    }
    printf ("Done Verifying Inverted Longword Data!\n\n");


    printf ("Checking FLASH...\n");
    if (check_eeprom(NO_ADDR, 0) == OK)
        printf("FLASH is erased\n\n");
    else {
        printf("FLASH is programmed between 0x%X and 0x%X\n\n",
	       eeprom_prog_first, eeprom_prog_last);
    }

    printf ("Erasing FLASH...\n");
    if (erase_eeprom(NO_ADDR, 0) != OK)
        printf("Error on erase_eeprom()\n\n");
    else
        printf("Done Erasing FLASH!\n\n");

    printf ("Checking FLASH...\n");
    if (check_eeprom(NO_ADDR, 0) == OK)
        printf("FLASH is erased\n\n");
    else
        printf("FLASH is programmed between 0x%X and 0x%X\n\n",
	       eeprom_prog_first, eeprom_prog_last);

/* 11/02/00 */
    printf ("Setting Lock Bits for Blocks 0-3... \n");
    if( (status = set_all_lock_bits() ) == OK )
        printf("Done!\n");
    else
        printf("Error! status =0x%x\n", status);

finish:
    _flushICache();

    printf ("\nHit <CR> to Continue...\n");
    (void)hexIn();
    return;
}

#endif // CYGPKG_IO_FLASH