u-boot

upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support

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			 Nios Development Kit
			   Cyclone Editions

		    Last Update: October 4, 2003
====================================================================

This file contains information regarding U-Boot and the Altera
Nios Development Kit, Cyclone Edition (DK-1C20). For general Nios
information see doc/README.nios.

For those interested in contributing ... see HELP WANTED section
in doc/README.nios.


Files
------
	board/dk1c20/*
	include/configs/DK1C20.h

Memory Organization
--------------------

  	-The heap is placed below the monitor (U-Boot code).
  	-Global data is placed below the heap.
  	-The stack is placed below global data (&grows down).

Misc
-----

The hello_world example works fine.


Programming U-Boot into FLASH with GERMS
-----------------------------------------
The current version of the DK-1C20 port occupies less than
60 KByte. So everything will fit into a single Flash sector.
To program U-Boot into the DK-1C20 flash using GERMS do the
following:

1. From the command line, download U-Boot using the nios-run:

	$ nios-run -r u-boot.srec

This takes about 45 seconds (GERMS is not very speedy here).
After u-boot is downloaded it will be executed. You should
see the following:

    U-Boot 1.0.0-pre (Oct  4 2003 - 07:39:24)

    CPU: Nios-32 Rev. 3.08 (0x3018)
    Reg file size: 256 LO_LIMIT/HI_LIMIT: 2/14
    Board: Altera Nios 1C20 Development Kit
    In:    serial
    Out:   serial
    Err:   serial
    ==>


2. Quit nios-run and start your terminal application (e.g. start
Hyperterminal or minicom).

3. From the U-Boot command prompt, erase a sector of flash at 0x40000:

    ==> erase 40000 4ffff

4. Download the u-boot code to RAM. When using Hyperterminal, do the
following:

 --From the u-boot command prompt start a binary download to SRAM:

    ==> loadb 800000

 --Download u-boot.bin using kermit.

5. Copy the binary image from SRAM to flash:

    ==> cp.b 800000 40000 10000

U-Boot will now automatically start when the board is powered on or
reset using the Standard-32 configuration. To start U-Boot with the
Safe-32 configuration, enter the following GERMS command:

    + g 40000

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