u-boot/board/trab
Wolfgang Denk 64134f0112 Fix linker scripts: add NOLOAD atribute to .bss/.sbss sections
With recent toolchain versions, some boards would not build because
or errors like this one (here for ocotea board when building with
ELDK 4.2 beta):
ppc_4xx-ld: section .bootpg [fffff000 -> fffff23b] overlaps section .bss [fffee900 -> fffff8ab]

For many boards, the .bss section is big enough that it wraps around
at the end of the address space (0xFFFFFFFF), so the problem will not
be visible unless you use a 64 bit tool chain for development. On
some boards however, changes to the code size (due to different
optimizations) we bail out with section overlaps like above.

The fix is to add the NOLOAD attribute to the .bss and .sbss
sections, telling the linker that .bss does not consume any space in
the image.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-01-12 20:31:39 +01:00
..
auto_update.c Adapt board configuration and fix kernel crash on MCC200 board. 2007-08-12 15:11:38 +02:00
cmd_trab.c board/[j-z]*: Remove lingering references to CFG_CMD_* symbols. 2007-07-10 10:48:22 -05:00
config.mk Add support for a saving build objects in a separate directory. 2006-09-01 19:49:50 +02:00
flash.c Fix some bugs in TRAB board flash driver. 2006-07-19 14:13:02 +02:00
lowlevel_init.S Prepare for SoC rework of ARM code: 2005-04-02 23:52:25 +00:00
Makefile Add functions to list of exported functions 2007-08-06 00:45:40 +02:00
memory.c Cleanup trab board for GCC-4.x 2006-06-26 10:54:52 +02:00
Pt1000_temp_data.h * Patch by Martin Krause, 11 Sep 2003: 2003-09-11 23:06:34 +00:00
README.kbd Initial revision 2002-11-03 00:24:07 +00:00
rs485.c * Patch by Martin Krause, 09 Oct 2003: 2003-10-09 13:16:55 +00:00
rs485.h Move TRAB burn-in tests to TRAB board directory 2003-09-12 15:35:15 +00:00
trab.c Fix compiler warning for TRAB board. 2006-08-10 01:58:22 +02:00
trab_fkt.c board/[j-z]*: Remove lingering references to CFG_CMD_* symbols. 2007-07-10 10:48:22 -05:00
tsc2000.c Fix TRAB channel switching delay for trab_fkt.bin standalone applikation 2006-06-16 16:14:28 +02:00
tsc2000.h * Patches by Xianghua Xiao, 15 Oct 2003: 2003-10-15 23:53:47 +00:00
u-boot.lds Fix linker scripts: add NOLOAD atribute to .bss/.sbss sections 2008-01-12 20:31:39 +01:00
vfd.c Bugfix in VFD routine on TRAB board. 2006-07-19 14:23:12 +02:00

The TRAB keyboard implementation is similar to that for LWMON and
R360MPI boards. The only difference concerns key naming. There are 4
keys on TRAB: 1, 2, 3, 4.

1) The "kbd" command provides information about the current state of
   the keys. For example,

	TRAB # kbd
	Keys: 1 0 1 0

   means that keys 1 and 3 are pressed. The keyboard status is also
   stored in the "keybd" environment variable. In this example we get

	keybd=1010

2) The "preboot" variable is set according to current environment
   settings and keys pressed. This is an example:

	TRAB # setenv magic_keys XY
	TRAB # setenv key_magicX 12
	TRAB # setenv key_cmdX echo ## Keys 1 + 2 pressed ##\;echo
	TRAB # setenv key_magicY 13
	TRAB # setenv key_cmdY echo ## Keys 1 + 3 pressed ##\;echo

   Here "magic_keys=XY" means that the "key_magicX" and "key_magicY"
   variables will be checked for a match. Each variable "key_magic*"
   defines a set of keys. In the our example, if keys 1 and 3 are
   pressed during reset, then "key_magicY" matches, so the "preboot"
   variable will be set to the contents of "key_cmdY":

	preboot=echo ## Keys 1 + 3 pressed ##;echo

3) The TRAB board has optional modem support. When a certain key
   combination is pressed on the keyboard at power-on, the firmware
   performs the necessary initialization of the modem and allows for
   dial-in. The key combination is specified in the
   "include/configs/trab.h" file. For example:

	#define        CONFIG_MODEM_KEY_MAGIC  "23"

   means that modem will be initialized if and only if both keys 2, 3
   are pressed. Note that the format of this string is similar to the
   format of "key_magic*" environment variables described above.