On Wed, Feb 27, 2008 at 12:37 PM, maxime louvel <
m.louvel@gmail.com> wrote:
Hi,
I am still trying to make a 2.6.25-rc3 vanilla kernel boot (an work fine in a second time) on a mpc8548amc board.
I
have add the platform
specific stuff from the sources of the current kernel running on the
cards.
What I have basically add is:
- arch/powerpc/platforms/85xx/mpc85xx_amc.c
- arch/powerpc/boot/dts/mpc8548amc.dts
I have also changed the Kconfig and Makefile in the arch/powerpc/platforms/85xx to make the kernel try to support my board
I have encountered some problem when compiling a uImage that I have basically solve like this (in arch/powerpc/boot/Makefile)
#$(obj)/4xx.o: BOOTCFLAGS += -mcpu=405
#$(obj)/ebony.o: BOOTCFLAGS += -mcpu=405
#$(obj)/cuboot-taishan.o: BOOTCFLAGS += -mcpu=405
#$(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=405
#$(obj)/treeboot-walnut.o: BOOTCFLAGS += -mcpu=405
I have a gcc-3.4.3 embedded compiler with some stuff specific to the platform.
After the previous hack, I have been able to compile a uImage.
I have tried to boot it and this is what I got:
AMC=> bootm 0x1000000
## Booting image at 01000000 ...
Image Name: Linux-2.6.24
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 1802038 Bytes = 1.7 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
No further messages...
I have recently updated the uboot of the cards (to support the new image version) and I am capable of booting a 2.6.23.6 image.
This last image has been compiled from a vanilla kernel where I have add the platform specific stuff (cf beginning of this mail).
Since my 2.6.23.6 image works fine, I have tried to adapt the file I have added to the 2.6.25-rc3 kernel.
I have made some changes in the arch/powerpc/platforms/85xx/mpc85xx_amc.c file and in the mpc8548amc.dts file.
I have attached the changes I have done on both files.
Do you have an idea ?
cheers,
Maxime
--
Maxime Louvel
0044 7964 5555 80
43 Allen road
Whitemore reans
WV60AW Wolverhampton
United Kingdom