Hi Anthony, On 27 February 2014 09:09, Anthony Mahar <anthony.j.ma...@gmail.com> wrote:
> How can I make the ethernet connection persistent (after first use), rather > than reconnecting/re initializing on each reuse? > > I'm working with a Xilinx Zynq zc706 board and am up and running u-boot > quite successfully. My main use case is to store u-boot in on-board flash, > and have u-boot tftp get / boot the bitstream, kernel image, devicetree, > and > ramdisk image. The following script functions well: > "qspiboot=echo Configure PL and booting Linux from TFTP... && " \ > "fpga info 0;" > \ > "tftp 0x1000000 system.bin;" > \ > "fpga load 0 0x1000000 cb44bc;" \ > "tftp 0x3000000 ${kernel_image};" \ > "tftp 0x2A00000 ${devicetree_image};" \ > "tftp 0x2000000 ${ramdisk_image};" \ > "bootm 0x3000000 0x2000000 0x2A00000\0" \ > > > The ethernet (Zynq's gem.e000b000) will get initialized on first use, as > appropriate, however the Ethernet is reinitialized and auto negotiated > again > for each subsequent tftp request which shouldn't be necessary. A snippet > is > listed below. Each 'reconnection' takes several seconds... a few to auto > negotiate, then a few more for the Windows based TFTP server to recognize > the connection and allow connections to the server. Multiply this by the > number of transfers and it takes a very long time to transfer a very little > amount of data. > Yes as Michal says you should use FIT and put everything in one file, or less than 4. I'm not sure if we have a command to load your FPGA image from FIT though. We could add one fairly easily now that we have fit_image_load(). Also take a look at asix_init() in drivers/usb/eth, which does not re-init the link if it is already up. This speeds things up. Regards, Simon
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