Problems compiling Linux for MPC8272ADS

Josh Boyer jwboyer at
Tue Sep 25 02:56:08 EST 2007

On Mon, 24 Sep 2007 12:26:24 -0400
"Manil Gaouar" <mgaouar at> wrote:

> Hi there,
> I am trying to compile the latest Linux from the git repos: git clone
> git:// linux-2.6-denx, I checked out
> the code a few weeks ago and was able to build my uImage no problems. I
> did a git pull this morning and I can not compile anymore, here is the
> error message I have:
>   BOOTCC  arch/powerpc/boot/ps3.o
>   BOOTCC  arch/powerpc/boot/treeboot-bamboo.o
>   BOOTCC  arch/powerpc/boot/cuboot-sequoia.o
>   BOOTCC  arch/powerpc/boot/treeboot-walnut.o
> {standard input}: Assembler messages:
> {standard input}:184: Error: Unrecognized opcode: `mfdcr'
> {standard input}:185: Error: Unrecognized opcode: `mfdcr'
> {standard input}:186: Error: Unrecognized opcode: `mfdcr'
> {standard input}:217: Error: Unrecognized opcode: `mtdcr'
> make[1]: *** [arch/powerpc/boot/treeboot-walnut.o] Error 1
> make: *** [uImage] Error 2
> here are the commands I am using:
> make mrproper
> make ARCH=powerpc CROSS_COMPILE=ppc_6xx- mpc8272_ads_defconfig
> make ARCH=powerpc CROSS_COMPILE=ppc_6xx- uImage
> Do you have any ideas, or I should check out the 2.6.22 stable release
> instead and try again???

Apply this:

    [POWERPC] 4xx: Fix Walnut wrapper compile errors
    Pass the appropriate -mcpu flag to the treeboot-walnut.o object to prevent
    some toolchains from erroring out with unknown opcodes
    Signed-off-by: Josh Boyer <jwboyer at>

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index c1582b6..ac516a1 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -33,6 +33,7 @@ BOOTCFLAGS    += -I$(obj) -I$(srctree)/$(obj)
 $(obj)/4xx.o: BOOTCFLAGS += -mcpu=440
 $(obj)/ebony.o: BOOTCFLAGS += -mcpu=440
+$(obj)/treeboot-walnut.o: BOOTCFLAGS += -mcpu=405
 zlib       := inffast.c inflate.c inftrees.c
 zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h

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