Jared Hulbert wrote: > > I think the "fast" in "fast synchronous" gives it away :-) > > Yes, I suppose it does. > > > I'm using Spansion MirrorBit S29GL128N, which reads at about 0.6 MByte/s. > > I think you should get more like an order of magnitude higher.... Get > an expert to look at your timings in the bootloader. Make sure things > are cached too. ioremap_cached()... Yes, looking at the Spansion datasheet, if it were interfaced properly it should be quite fast. (25ns access time for in-page 16-bit reads, 100ns for random reads). I'll see if ioremap_cached() makes a difference to streaming read performance. The BSP suppliers have been quite cautious in places, flushing cache a bit too often. (I'm not surprised - we had disk ext3 filesystem corruption due to insufficient cache flushing in places too.) > > Oh, and it's a 166MHz ARM, so it's quite capable of decompressing > > faster than the NOR can deliver. > > Depends on how you are measuring it. You ought to be able to get at > least 2 orders of magnitude higher read speeds with a good sync Flash. > Some of the newer stuff is even faster. Thanks. Oh, how I look forward to the day of working with current kernels and current hardware. -- Jamie -- 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
