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>
Modifications are based on the linux kernel approach and
support two use cases:
1) Add O= to the make command line
'make O=/tmp/build all'
2) Set environement variable BUILD_DIR to point to the desired location
'export BUILD_DIR=/tmp/build'
'make'
The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'
Command line 'O=' setting overrides BUILD_DIR environent variable.
When none of the above methods is used the local build is performed and
the object files are placed in the source directory.
Problems have been seen in the linux kernel's smc91x network driver
due to improper bus timings. The latest 2.6 OMAP kernels currently
have a workaround, but this fix belongs in u-boot.
Patch by Kevin Hilman, 13 Oct 2005
- Fix OMAP support that omap5912osk compiles in current source tree
- Update with code from "http://omap.spectrumdigital.com/osk5912"
to fix problems with DDR initialization
- Fix timer setup
- Use CFI flash driver and support complete 32MB of onboard flash
- Add "print_cpuinfo()" and "checkboard()" functions to display
CPU (with frequency) and Board infos
Patch by Stefan Roese, 10 May 2006
Use drivers/cfi_flash.c instead of private flash driver;
Remove hardcoded personalized settings from omap5912osk.h;
Fix spacing with (RO) marks in 'flinfo' output.
Patch by Michael Bendzick, 14 Jan 2005
