Re: [U-Boot] Bottleneck of NAND copy speed

2011-09-13 Thread Scott Wood
On 09/12/2011 06:21 AM, Simon Schwarz wrote: > Hi List, > > ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in > my SPL. > > I’m searching for the speed bottleneck of the MT29F1G16ABBHC-ET > NAND-Flash on the devkit8000 (OMAP3). > > From the timings I set on the GPMC I ca

Re: [U-Boot] Bottleneck of NAND copy speed

2011-09-13 Thread Simon Schwarz
On 09/12/2011 02:55 PM, Nick Thompson wrote: > On 12/09/11 12:21, Simon Schwarz wrote: >> Hi List, >> >> ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in >> my SPL. >> >> I’m searching for the speed bottleneck of the MT29F1G16ABBHC-ET >> NAND-Flash on the devkit8000 (OMAP3).

Re: [U-Boot] Bottleneck of NAND copy speed

2011-09-13 Thread Simon Schwarz
Dear Wolfgang, caches are on. Regards Simon On 09/12/2011 01:43 PM, Wolfgang Denk wrote: > Dear Simon Schwarz, > > In message<4e6deb26.4020...@gmail.com> you wrote: >> >> ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in >> my SPL. > ... >> Does anyone has an idea where t

Re: [U-Boot] Bottleneck of NAND copy speed

2011-09-12 Thread Nick Thompson
On 12/09/11 12:21, Simon Schwarz wrote: > Hi List, > > ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in > my SPL. > > I’m searching for the speed bottleneck of the MT29F1G16ABBHC-ET > NAND-Flash on the devkit8000 (OMAP3). > > From the timings I set on the GPMC I calced a m

Re: [U-Boot] Bottleneck of NAND copy speed

2011-09-12 Thread Wolfgang Denk
Dear Simon Schwarz, In message <4e6deb26.4020...@gmail.com> you wrote: > > ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in > my SPL. ... > Does anyone has an idea where the bottleneck could be? Is my calculation > wrong? Caches still turned off? Best regards, Wolfgang

[U-Boot] Bottleneck of NAND copy speed

2011-09-12 Thread Simon Schwarz
Hi List, ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in my SPL. I’m searching for the speed bottleneck of the MT29F1G16ABBHC-ET NAND-Flash on the devkit8000 (OMAP3). From the timings I set on the GPMC I calced a max. speed of around 26 MiB/s. In my measurements I hav