Hi, I hope I can also ask a question about the redboot bootloader in this newsgroup. We`re using this bootloader for your ecos o/s on a mips target.
My question is regarding the first file which will be executed running redboot bootloader in RAM mode from ddr ram: located int: ecos/packages/dev/flash/hal/mips/arch/current/src/vectors.s [ la k0,INITIAL_CONFIG0 # Set up config0 register mtc0 k0,config0 # to disable cache ] Compared to the redboot RAMROM version, the cache (KO & MM value from config0 register) will be disabled by executing the above instructions. Is there any specific reason for disabling the cache running from RAM? And if there`s such a reason, where could I enable the cache after the init for example? Because after the bootloader is running, I want to download some files by the serial port to the ddr ram and in a second step I want to program these files into the spi flash. Regarding the spi flash, I noticed the missing cache, because it takes much longer to download the code to the flash device. If I set the KO (0x3 cache/no coh./wr-bck/wr-alloc) and MM (enable) it`s as fast as running the RAMROM bootloader version. best regards Bernd -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
