flash.c

eCos操作系统源码

        stat = (*_flash_program_buf)(addr, data, size, 
                                     flash_info.block_mask, flash_info.buffer_size);
        stat = flash_hwr_map_error(stat);
#ifdef CYGSEM_IO_FLASH_VERIFY_PROGRAM
        if (0 == stat) // Claims to be OK
            if (memcmp(addr, data, size) != 0) {                
                stat = 0x0BAD;
#ifdef CYGSEM_IO_FLASH_CHATTER
                (*flash_info.pf)("V");
#endif
            }
#endif
        if (stat) {
            *err_addr = (void *)addr;
            break;
        }
#ifdef CYGSEM_IO_FLASH_CHATTER
        (*flash_info.pf)(".");
#endif
        len -= size;
        addr += size/sizeof(*addr);
        data += size/sizeof(*data);
    }
    FLASH_Disable((unsigned short*)addr, (unsigned short *)(addr+len));
    HAL_FLASH_CACHES_ON(d_cache, i_cache);
#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("\n");
#endif
    return (stat);
}

int
flash_read(void *_addr, void *_data, int len, void **err_addr)
{
#ifdef CYGSEM_IO_FLASH_READ_INDIRECT
    int stat = 0;
    int size;
    typedef int code_fun(void *, void *, int, unsigned long, int);
    code_fun *_flash_read_buf;
    unsigned char *addr = (unsigned char *)_addr;
    unsigned char *data = (unsigned char *)_data;
    CYG_ADDRESS tmp;
    int d_cache, i_cache;

    if (!flash_info.init) {
        return FLASH_ERR_NOT_INIT;
    }

#ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
    if (plf_flash_query_soft_wp(addr,len))
        return FLASH_ERR_PROTECT;
#endif

    _flash_read_buf = (code_fun*) __anonymizer(&flash_read_buf);

#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("... Read from %p-%p at %p: ", (void*)data, 
                     (void*)(((CYG_ADDRESS)data)+len), (void*)addr);
#endif

    HAL_FLASH_CACHES_OFF(d_cache, i_cache);
    FLASH_Enable((unsigned short*)addr, (unsigned short *)(addr+len));
    while (len > 0) {
        size = len;
        if (size > flash_info.block_size) size = flash_info.block_size;

        tmp = (CYG_ADDRESS)addr & ~flash_info.block_mask;
        if (tmp) {
                tmp = flash_info.block_size - tmp;
                if (size>tmp) size = tmp;

        }

        stat = (*_flash_read_buf)(addr, data, size, 
                                     flash_info.block_mask, flash_info.buffer_size);
        stat = flash_hwr_map_error(stat);
#ifdef CYGSEM_IO_FLASH_VERIFY_PROGRAM_
        if (0 == stat) // Claims to be OK
            if (memcmp(addr, data, size) != 0) {                
                stat = 0x0BAD;
#ifdef CYGSEM_IO_FLASH_CHATTER
                (*flash_info.pf)("V");
#endif
            }
#endif
        if (stat) {
            *err_addr = (void *)addr;
            break;
        }
#ifdef CYGSEM_IO_FLASH_CHATTER
        (*flash_info.pf)(".");
#endif
        len -= size;
        addr += size/sizeof(*addr);
        data += size/sizeof(*data);
    }
    FLASH_Disable((unsigned short*)addr, (unsigned short *)(addr+len));
    HAL_FLASH_CACHES_ON(d_cache, i_cache);
#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("\n");
#endif
    return (stat);
#else // CYGSEM_IO_FLASH_READ_INDIRECT
    // Direct access to FLASH memory is possible - just move the requested bytes
    if (!flash_info.init) {
        return FLASH_ERR_NOT_INIT;
    }
    memcpy(_data, _addr, len);
    return FLASH_ERR_OK;
#endif
}

#ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING

int
flash_lock(void *addr, int len, void **err_addr)
{
    unsigned short *block, *end_addr;
    int stat = 0;
    typedef int code_fun(unsigned short *);
    code_fun *_flash_lock_block;
    int d_cache, i_cache;

    if (!flash_info.init) {
        return FLASH_ERR_NOT_INIT;
    }

#ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
    if (plf_flash_query_soft_wp(addr,len))
        return FLASH_ERR_PROTECT;
#endif

    _flash_lock_block = (code_fun*) __anonymizer(&flash_lock_block);

    block = (unsigned short *)((CYG_ADDRESS)addr & flash_info.block_mask);
    end_addr = (unsigned short *)((CYG_ADDRESS)addr+len);

    /* Check to see if end_addr overflowed */
    if( (end_addr < block) && (len > 0) ){
        end_addr = (unsigned short *) ((CYG_ADDRESS) flash_info.end - 1);
    }

#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("... Lock from %p-%p: ", block, end_addr);
#endif

    HAL_FLASH_CACHES_OFF(d_cache, i_cache);
    FLASH_Enable(block, end_addr);
    while (block < end_addr) {
        unsigned short *tmp_block;
        stat = (*_flash_lock_block)(block);
        stat = flash_hwr_map_error(stat);
        if (stat) {
            *err_addr = (void *)block;
            break;
        }

        // Check to see if block will overflow
        tmp_block = block + flash_info.block_size / sizeof(*block);
        if(tmp_block < block){
            // If block address overflows, set block value to end on this loop
            block = end_addr;
        }
        else{
            block = tmp_block;
        }
#ifdef CYGSEM_IO_FLASH_CHATTER
        (*flash_info.pf)(".");
#endif
    }
    FLASH_Disable(block, end_addr);
    HAL_FLASH_CACHES_ON(d_cache, i_cache);
#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("\n");
#endif
    return (stat);
}

int
flash_unlock(void *addr, int len, void **err_addr)
{
    unsigned short *block, *end_addr;
    int stat = 0;
    typedef int code_fun(unsigned short *, int, int);
    code_fun *_flash_unlock_block;
    int d_cache, i_cache;

    if (!flash_info.init) {
        return FLASH_ERR_NOT_INIT;
    }

#ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
    if (plf_flash_query_soft_wp(addr,len))
        return FLASH_ERR_PROTECT;
#endif

    _flash_unlock_block = (code_fun*) __anonymizer(&flash_unlock_block);

    block = (unsigned short *)((CYG_ADDRESS)addr & flash_info.block_mask);
    end_addr = (unsigned short *)((CYG_ADDRESS)addr+len);

    /* Check to see if end_addr overflowed */
    if( (end_addr < block) && (len > 0) ){
        end_addr = (unsigned short *) ((CYG_ADDRESS) flash_info.end - 1);
    }

#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("... Unlock from %p-%p: ", block, end_addr);
#endif

    HAL_FLASH_CACHES_OFF(d_cache, i_cache);
    FLASH_Enable(block, end_addr);
    while (block < end_addr) {
        unsigned short *tmp_block;
        stat = (*_flash_unlock_block)(block, flash_info.block_size, flash_info.blocks);
        stat = flash_hwr_map_error(stat);
        if (stat) {
            *err_addr = (void *)block;
            break;
        }

        tmp_block = block + flash_info.block_size / sizeof(*block);
        if(tmp_block < block){
            // If block address overflows, set block value to end on this loop
            block = end_addr;
        }
        else{
            block = tmp_block;
        }
#ifdef CYGSEM_IO_FLASH_CHATTER
        (*flash_info.pf)(".");
#endif
    }
    FLASH_Disable(block, end_addr);
    HAL_FLASH_CACHES_ON(d_cache, i_cache);
#ifdef CYGSEM_IO_FLASH_CHATTER
    (*flash_info.pf)("\n");
#endif
    return (stat);
}
#endif

char *
flash_errmsg(int err)
{
    switch (err) {
    case FLASH_ERR_OK:
        return "No error - operation complete";
    case FLASH_ERR_ERASE_SUSPEND:
        return "Device is in erase suspend state";
    case FLASH_ERR_PROGRAM_SUSPEND:
        return "Device is in program suspend state";
    case FLASH_ERR_INVALID:
        return "Invalid FLASH address";
    case FLASH_ERR_ERASE:
        return "Error trying to erase";
    case FLASH_ERR_LOCK:
        return "Error trying to lock/unlock";
    case FLASH_ERR_PROGRAM:
        return "Error trying to program";
    case FLASH_ERR_PROTOCOL:
        return "Generic error";
    case FLASH_ERR_PROTECT:
        return "Device/region is write-protected";
    case FLASH_ERR_NOT_INIT:
        return "FLASH sub-system not initialized";
    case FLASH_ERR_DRV_VERIFY:
        return "Data verify failed after operation";
    case FLASH_ERR_DRV_TIMEOUT:
        return "Driver timed out waiting for device";
    case FLASH_ERR_DRV_WRONG_PART:
        return "Driver does not support device";
    case FLASH_ERR_LOW_VOLTAGE:
        return "Device reports low voltage";
    default:
        return "Unknown error";
    }
}

// EOF io/flash/..../flash.c