In message 877aabc4040817045975185242@mail.gmail.com you wrote:
My situation is a bit similar as well. I too have a PCI card. However, we do have flash, so I use u-boot to initialize the SDRAM and UART on the board. After this is done, some binary (evenutally, a uImage) is to be loaded and run. How to synchroize these things? How to stop
Implement a protocol. I have no ideahow your hardware is designed, but if you have some kind of shared memory you will probably also have thought about ways to synchronize access to it?
u-boot so that image from the PCI can be transferred? Better would be
Why stop U-Boot? Just run a command that puts it into "wait for download completed" state.
to interrupt the host, and the driver then signals some userspace program to transfer the image. After this, signal the MV64360 that the binary is loaded, so that u-boot can then continue and transfer execution to the binary / uImage.
This is a design issue. As far as U-Boot on the PCI card is concerned it should make no difference if the download is done by Linux driver or application code.
Best regards,
Wolfgang Denk