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https://github.com/AsahiLinux/u-boot
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128 lines
4.2 KiB
Text
128 lines
4.2 KiB
Text
Xilinx ML300 platform
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=====================
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0. Introduction
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---------------
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The Xilinx ML300 board is based on the Virtex-II Pro FPGA with
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integrated AMCC PowerPC 405 core. The board is normally booted from
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System ACE CF. U-Boot is then run out of main memory.
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An FPGA is a configurable and thus very flexible device. To
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accommodate for this flexibility this port of U-Boot includes the
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required means to regenerate the drivers and configuration files if
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you decide to change the hardware design. The required steps are
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described below.
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1. Requirements
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---------------
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To compile and run U-Boot on the Xilinx ML300 platform you need the
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following items.
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- A Xilinx ML300 platform (see http://www.xilinx.com/ml300)
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- EDK and ISE development tools (shipping with ML300)
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- Parallel4 cable (shipping with ML300)
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- The EDK reference design for ML300. You can get this as design #6 from
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http://www.xilinx.com/ise/embedded/edk_examples.htm
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- A BOOTP/TFTP server
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2. Quick Start
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--------------
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To compile and run U-Boot on ML300 follow the steps below. Make sure
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to consult the documentation for U-Boot, EDK, and the EDK reference
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design for ML300 if you have any questions.
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1. Implement the EDK reference design for ML300. You can use any of
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the project files, for example from a xygwin shell:
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$ xps -nw system_linux.xmp
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XPS% run init_bram
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2. Configure and compile U-Boot. Change into the root directory of
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U-Boot and run:
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$ export CROSS_COMPILE=powerpc-eabi-
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$ make ml300_config
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$ make
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3. Set up the ML300, connect the Parallel4 and the serial cable. Start
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a terminal on your host computer and set the communication
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parameters to 9600,8N1,no handshake.
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4. Set up the BOOTP/TFTP server on your host machine. U-Boot is
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preconfigured to use a fixed HW MAC address of 00:0A:35:00:22:01.
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5. Download the bitstream to the ML300.
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6. Use XMD to download and run U-Boot on the ML300:
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$ xmd
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XMD% ppcconnect
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XMD% dow u-boot
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XMD% run
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You can now make an ACE file out of bitstream and U-Boot:
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$ xmd genace.tcl -jprog -board ml300 -hw \
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implementation/download.bit -elf u-boot -ace top.ace
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Put the ACE file onto the MicroDrive, for example into xilinx/myace,
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and reboot ML300.
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3. Generating a Custom BSP for U-Boot
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-------------------------------------
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If you decide to change the EDK reference design for ML300 or if you
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build a new design from scratch either with the Base System Builder in
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XPS or all by hand you most likely will change the base addresses for
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the Uart and the Ethernet peripheral. If you do so you will have two
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options:
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1. Edit boards/xilinx/ml300/xparameters.h to reflect the changes you
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made to your hardware.
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2. Use the MLD technology provided by Xilinx Platform Studio to make
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the changes automatically. To do so go to the root directory of the
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EDK reference design for ML300. Copy the Linux project file and the
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Linux software configuration file:
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$ cp system_linux.xmp system_uboot.xmp
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$ cp system_linux.mss system_uboot.mss
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Edit system_uboot.xmp and and have it point to system_uboot.mss for
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the software configuration.
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Then, copy the sw_services directory in
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boards/xilinx/ml300/sw_services to the root directory of the EDK
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reference design for ML300.
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$ cp -R <uboot dir>/boards/xilinx/ml300/sw_services <edk dir>
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Modify system_uboot.mss. Look for the Linux library definition
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and change it to generate a BSP for U-Boot. An example, might look
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like this:
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BEGIN LIBRARY
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PARAMETER LIBRARY_NAME = uboot
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PARAMETER LIBRARY_VER = 1.00.a
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PARAMETER CONNECTED_PERIPHS = (opb_uart16550_0,opb_ethernet_0)
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PARAMETER TARGET_DIR = <uboot dir>
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END
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Now, you are ready to generate the Xilinx ML300 BSP for U-Boot:
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$ xps -nw system_uboot.xmp
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XPS% run libs
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If all goes well the new configuration has been copied into the
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right places within the U-Boot source tree. Recompile U-Boot and
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run it on the ML300.
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4. ToDo
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-------
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- Add support for all other peripherals on ML300.
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- Read the MAC address out of the IIC EEPROM.
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- Store the bootargs in the IIC EEPROM.
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5. References
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-------------
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ML300: http://www.xilinx.com/ml300
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EDK: http://www.xilinx.com/edk
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ISE: http://www.xilinx.com/ise
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Reference Design: http://www.xilinx.com/ise/embedded/edk_examples.htm
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