On Wednesday, August 16, 2017 1, Nicolas Pitre wrote: > > Just FYI, > > I'm running an xipImage with all the RZ/A1 upstream drivers enabled and > > only using about 4.5MB of total system RAM. > > That's pretty good. Of course for a real application, you would trim off > > the drivers and subsystems you don't plan on using, thus lowering your > > RAM usage. > > On my MMU-less test target I'm going under the 1MB mark now. Show off ;) > Given that I also applied the device table patch to mkcramfs (that > allows for the creation of device nodes and arbitrary > user/group/permission without being root) it would be possible to extend > this mechanism to implement other XIP patterns such as for > uncompressible media files for example. Good, I was going to ask about that. I made an example once were all the graphics were RAW and uncompressed and marked as XIP in AXFS. The result was a large saving of RAM because as the graphics framework (DirectFB) would copy directly from Flash whenever it needed to do a background erase or image re-draw (button press animations). Same went for playing MP3 files. The MP3 files were XIP in flash, so mpg123 pulled from flash directly. Chris -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
