Hi, Spencer Oliver wrote: >> >> I am successfully loading elf images via jtag into systems >> >> RAM (load_image foobar.elf). However, as I am using a simple >> >> DLC5 cable that action takes ages for just a couple of kilobytes. >> >> Is it possible to load a elf image that is stored in flash into RAM? >> >> > > > > What target are you connecting too?
I am working with a Sigma SMP8634 chip which has a MIPS 4Kce core. > > The ejtag system has speed issues when compared to arm debug. the initial > > tests i have done the usb dongles are slower than the parallel port type. I just have the simple Xilinx DLC5 cable which is basically a one-to-one connections with 5 resistors. > > This is due to each memory read/write instruction is fetched from the > > debugger (openocd) for load_image. dma speeds things up if it is supported. I guess DMA is not supported in my case. > > One question if you have the image in flash, can you not debug from flash? Well, at the moment I don't have it in flash, I am currently downloading it via jtag. The elf image is a executable with a entry point in RAM. Sure, I can try to change the linker scripts and everything else to run it out of flash like everybody else does, but using exactly that image would be very nice. My idea is to tell the load_image command (or any other command) to not load the entire elf-image via jtag but directly from a flash address. This should be faster since I don't have to transfer the bytes via jtag as running a set of mww commands should to the trick, right? Is this possible or am I getting something completely wrong? Best regards, Andi _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
