RE: [U-Boot-Users] Re: [Question About NAND BOOT In SMDK2410
-----Original Message----- From: Wolfgang Denk [mailto:wd@denx.de] Sent: Wednesday, October 29, 2003 2:39 PM To: choigi@samsung.com Cc: u-boot-users@lists.sourceforge.net Subject: [U-Boot-Users] Re: [Question About NAND BOOT In SMDK2410
What do you have in mind? Boot U-Boot from a Smart Media Card? [Can't be done.]
Wolfgang it is code and with code anything can be done I have written code to read and write to a SmartMedia card from an 8051 8-bit micro. If I had a need to read a kernel out of SmartMedia then I could do that just as eaisly. At 50MHz processor I could even do an effective ECC and still read it out. It would be just a bit more work from the u-boot perspective and maybe a new command Eg smboot. I have not done this but I can not think of a reason why it cannot be done.
Regards, Rod Boyce
In message 8D7C5F56B409554D9D46AC22195807F3061DD3@exchwenz01.dmcwave.co.nz you wrote:
What do you have in mind? Boot U-Boot from a Smart Media Card? [Can't be done.]
[Dear Rod, please stick with standard quotin rules - read the Netiquette if necessary.]
Wolfgang it is code and with code anything can be done I have written code
Arghhh... I have yet to see any processor that can "boot" (i. e. start fetching instructions out or reset) from an NAND flash device. So far, all of them need some software to do this, which must be loaded from a _real_ boot device.
to read and write to a SmartMedia card from an 8051 8-bit micro. If I had a
But I guess the first instruction the 8051 executed was NOT loaded from the SmartMedia card? I guess there was some ROM which you used as boot device, right?
need to read a kernel out of SmartMedia then I could do that just as eaisly.
Please read again what I posted. What does "boot" mean? Is it bootstrapping a processor out of the reset condition into some sort of software (typeically a monitor program like U-Boot), or is it using a bootloader to bootstrap an operating system?
At 50MHz processor I could even do an effective ECC and still read it out.
Can't be done. It won't start fetching instructions from SmartMedia when you relese the reset pin.
I have not done this but I can not think of a reason why it cannot be done.
Think again. Read again. Read before posting, please.
Wolfgang Denk
participants (2)
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Rod Boyce -
Wolfgang Denk