uboot-mt623x/board/a3000
Sebastien Carlier 6d8962e814 Switch from archive libraries to partial linking
Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils.  As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".

This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.

The name of each former library archive is preserved except for
extensions which change from ".a" to ".o".  This commit updates
references accordingly where needed, in particular in some linker
scripts.

This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols.  Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.

Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
2010-11-17 21:02:18 +01:00
..
Makefile Switch from archive libraries to partial linking 2010-11-17 21:02:18 +01:00
README * Code cleanup: 2003-06-27 21:31:46 +00:00
a3000.c rename CFG_ macros to CONFIG_SYS 2008-10-18 21:54:03 +02:00
flash.c rename CFG_ macros to CONFIG_SYS 2008-10-18 21:54:03 +02:00

README

U-Boot for Artis SBC-A3000
---------------------------

Artis SBC-A3000 has one flash socket that the user uses Intel 28F128J3A (16MB)
or 28F064J3A (8MB) chips.

In board's notation, bank 0 is the one at the address of 0xFF000000.
bank 1 is the one at the address of 0xFF800000

On power-up the processor jumps to the address of 0xFFF00100, the last
megabyte of the bank 0 of flash.

Thus, U-Boot is configured to reside in flash starting at the address of
0xFFF00000.  The environment space is located in flash separately from
U-Boot, at the address of 0xFFFE0000.

There is a National ns83815 10/100M ethernet controller on-board.