Ulf Samuelson wrote: > There are no Atmel AT91SAM9 dev boards which uses a parallel flash.
This is not quite true. I'm able to boot a AT91SAM9263-EK board via EBI NOR flash and an AT91Bootstrap/Atmel modified U-Boot right now. Did I misunderstand your statement above? One needs only to solder an appropriate EBI NOR chip to the AT91SAM9263-EK board and install the BMS jumper to allow parallel flash booting. Unfortunately, the boards in the AT91SAM9260-EK and AT91SAM9261-EK can't support an EBI NOR flash due to intentional design limitations. Sincerely, Ken Fuchs > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Ulf Samuelsson > Sent: Wednesday, February 13, 2008 15:16 > To: E Robertson; u-boot-users@lists.sourceforge.net > Subject: Re: [U-Boot-Users] AT91 Bootstrap in U-boot > > > > Hi, > > Is their a reason why the AT91 Bootstrap code was never ported to > > U-boot? > > Yes, Integrating AT91Bootstrap only makes sense if you have a > parallel flash. > > There are no Atmel AT91SAM9 dev boards which uses a parallel flash. > The AT91RM9200 boards uses parallel flash, but they do not > use AT91Bootstrap. > > The SAM9 boards all have an AT45 dataflash which has an SPI interface. > The BMS pin needs to be configured to make the CPU boot from > the internal BootROM. > The BootROM copies the initial application at address 0 of > the dataflash to internal SRAM. > The SRAM can be as small as 4 kB (in the AT91SAM9260) and > that limits the functionality. > U-Boot does not fit, so you have AT91bootstrap. > > AT91bootstrap needs to run BEFORE U-Boot is started. > > > Best Regards > Ulf Samuelsson > > -------------------------------------------------------------- > ----------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > U-Boot-Users mailing list > U-Boot-Users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/u-boot-users > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
