On Sat, Feb 19, 2022 at 09:16:27AM +0300, Ivan Bornyakov wrote: > On Sat, Feb 19, 2022 at 12:05:55AM +0800, Xu Yilun wrote: > > > > Maybe the bitstream info at the head of the image could be parsed in > > write_init(), and this requires the driver fill the > > fpga_manager_ops.initial_header_size > > > > Header size is not known beforehand and is stored in 25th byte of the > image. > Actually I was not quite accurate here. The header itself seems to be of constant size according to https://coredocs.s3.amazonaws.com/DirectC/2021_2/spi_directc.pdf (4. Data File Format) But the lookup table is definitely of a variable size. Moreover bitstream start and size both are somewhere in the image and needed to be located through lookup table.
