[U-Boot-Users] Steps performed by Uboot!
Hi
I am new to this list. I want to use U-boot for my Intels Xscale PXA255. To start my linux OS, I want these things to be performed. Can anyone tell me what out of these steps, U-boot can perform for me?
a. Initialize the CPU Clock. b. Initialize the on chip Serial UART for debug messages. c. Initialize and set up the SDRAM. d. Check and report the FLASH and SDRAM sizes. e. Check and report the available Peripherals. f. Copy the rest of the BIOS to SDRAM and transfer control g. Invoke the OS and transfer control
Thanks in advance for any help!
Regards, Deya.
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Dear Deya,
in message 20030829054635.47900.qmail@web8205.mail.in.yahoo.com you wrote:
I am new to this list. I want to use U-boot formy Intels Xscale PXA255. To start my linux OS, I want these things to be performed. Can anyone tell me what out of these steps, U-boot can perform for me?
In a first step, you should always read the available documentation; for U-Boot the README (included with the source code) and the DULG (http://www.denx.de/twiki/bin/view/DULG/Manual) are mandatory.
a. Initialize the CPU Clock.
Check.
b. Initialize the on chip Serial UART for debug messages.
Check.
c. Initialize and set up the SDRAM.
Check.
d. Check and report the FLASH and SDRAM sizes.
Check.
e. Check and report the available Peripherals.
Check [assuming a complete port of U-Boot to your board]
f. Copy the rest of the BIOS to SDRAM and transfer control
Check [assuming with "BIOS" you mean U-Boot]
g. Invoke the OS and transfer control
Check [if you enter a command to boot the OS - either manually or automatically using the bootcmd environment variable]
Best regards,
Wolfgang Denk
participants (2)
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deya privi -
Wolfgang Denk