static int flash_erase32(flash_info_t *info, int s_first, int s_last)
{
    int flag, sect;
    ulong start, now, last;
    int prot = 0;

    /* Validate arguments */
    if ((s_first < 0) || (s_first > s_last)) {
        if (info->flash_id == FLASH_UNKNOWN)
            printf ("- missing\n");
        else
            printf ("- no sectors to erase\n");
        return 1;
    }

    /* Check for KNOWN flash type */
    if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
        printf ("Can erase only Intel flash types - aborted\n");
        return 1;
    }

    /* Check for protected sectors */
    for (sect = s_first; sect <= s_last; ++sect) {
        if (info->protect[sect])
            prot++;
    }
    if (prot)
        printf ("- Warning: %d protected sectors will not be erased!\n", prot);
    else
        printf ("\n");

    start = get_timer (0);
    last  = start;
    /* Start erase on unprotected sectors */
    for (sect = s_first; sect <= s_last; sect++) {
        WATCHDOG_RESET();
        if (info->protect[sect] == 0) {      /* not protected */
            vu_long *addr = (vu_long *)(info->start[sect]);
            unsigned long status;

            /* Disable interrupts which might cause a timeout here */
            flag = disable_interrupts();

            *addr = 0x00500050;              /* clear status register */
            *addr = 0x00200020;              /* erase setup */
            *addr = 0x00D000D0;              /* erase confirm */

            /* re-enable interrupts if necessary */
            if (flag)
                enable_interrupts();

            /* Wait at least 80us - let's wait 1 ms */
            udelay (1000);

            while (((status = *addr) & 0x00800080) != 0x00800080) {
                if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
                    printf ("Timeout\n");
                    *addr = 0x00B000B0;      /* suspend erase      */
                    *addr = 0x00FF00FF;      /* reset to read mode */
                    return 1;
                }

                /* show that we're waiting */
                if ((now - last) > 990) {   /* every second */
                    putc ('.');
                    last = now;
                }
            }
            *addr = 0x00FF00FF;              /* reset to read mode */
        }
    }
    printf (" done\n");
    return 0;
} /* end flash_erase32() */