Following the procedures of "Serial Boot and Flash Loading Utility for OMAP-L137",
the command line was issued to programming evm spi flash.
>> sfh_OMAP-L137.exe -flash_dsp -targetType OMAPL137_v1 -p com2 -baud 230400 dsp-spi-ais.bin ubl-spi.bin u-boot.bin
The spi flash failed to boot. However, same ubl files programmed with "nand_writer_ccsv3.out" was OK.
After dumping the spi memory, I found different header was put before u-boot.bin at 0x8000 location.
I think different arm ubl may be required for sfh_OMAP-L137.exe and nand_writer_ccsv3.out.
But I couldn't find it out.