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U-BOOT Port for FSForth ModNET50 Board
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author: Thomas Elste <info@elste.org>
The port based upon an early (partial complete)
armboot-port from Stephan Linz for the ModNET50 Board.
Overview:
- board with Netsilicon NET+50 ARM7TDMI CPU without MMU
- 16 MB SDRAM
- 2 MB Flash (MBL29LV160BE)
- 10/100 Ethernet PHY (LXT971A)
Current Configuration (include/configs/modnet50.h):
Memory Map: 0x00000000 - 0x00FFFFFF 16M SDRAM
The Flash uses a BB-Architectur with 35 sectors
(0:16K; 1,2:8K; 3:32K; 4-34:64K). U-Boot is located in
the first 5 sectors.
The environment is located at the end of the 4th Flash
sector (0x1001C000-0x1001FFFF).
Build:
U-boot should be build by using the ELDK Toolchain (arm-linux-*).
make modnet50_config
make
Status:
Everything seems to work fine. Booting images was tested by
booting uCLinux (with and without a separate ramdisk image) from
flash.
Files:
cpu/arm720t/serial_netarm.c .. serial I/O for the cpu
board/modnet50/lowlevel_init.S .. memory setup for ModNET50
board/modnet50/flash.c .. flash routines
board/modnet50/modnet50.c .. some board init stuff
drivers/net/netarm_eth.c .. ethernet driver for the NET+50 CPU
drivers/net/netarm_eth.h .. header for ethernet driver
include/configs/modnet50.h .. configuration file for ModNET50
include/netarm_*.h .. register and macro definitions for
the NETARM CPU family
doc/README.modnet50 .. this readme