[U-Boot] [PATCH v2] powerpc/85xx: select -mcpu=8540 to match -Wa, e500
Andy Fleming
afleming at gmail.com
Thu Jan 24 09:07:29 CET 2013
Scott, I reverted this patch, and it fixed some build errors:
20001122-1.c:1:0: error: E500 and FPRs not supported
20010114-2.c:1:0: error: E500 and FPRs not supported
make[2]: ***
[/local/afleming/u-boot/build/P2020DS/post/lib_powerpc/fpu/20001122-1.o]
Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: ***
[/local/afleming/u-boot/build/P2020DS/post/lib_powerpc/fpu/20010114-2.o]
Error 1
make[1]: *** [postdeps] Error 2
make: *** [/local/afleming/u-boot/build/P2020DS/post/libpost.o] Error 2
make: INTERNAL: Exiting with 4 jobserver tokens available; should be 3!
Similar errors were seen on all these boards:
P2041RDB_SRIO_PCIE_BOOT P5020DS
P3041DS P5020DS_NAND
P2020DS P3041DS_NAND P5020DS_SDCARD
P2020DS_36BIT P3041DS_SDCARD P5020DS_SECURE_BOOT
P2020DS_DDR2 P3041DS_SECURE_BOOT P5020DS_SPIFLASH
P2020DS_SDCARD P3041DS_SPIFLASH P5020DS_SRIO_PCIE_BOOT
P2020DS_SPIFLASH P3041DS_SRIO_PCIE_BOOT P5040DS
P2041RDB P4080DS xpedite520x
P2041RDB_NAND P4080DS_SDCARD xpedite537x
P2041RDB_SDCARD P4080DS_SECURE_BOOT xpedite550x
P2041RDB_SECURE_BOOT P4080DS_SPIFLASH
P2041RDB_SPIFLASH P4080DS_SRIO_PCIE_BOOT
On Fri, Jan 18, 2013 at 7:38 PM, Scott Wood <scottwood at freescale.com> wrote:
> This allows building with toolchains that by default target e6500.
>
> When targetting e6500, GCC generates a two-operand form of mfcr which gas
> normally maps to mfocr. However, when we tell gas to target e500 rather
> than e6500, it rejects two-operand mfcr. Tell GCC to target a
> least-common-denominator e500 to match what we tell the assembler.
>
> -misel and -mno-strict-align are added to keep the code size from growing
> (it actually ends up shrinking a bit compared to -mcpu=603e, which was
> the default on my old toolchain).
>
> Signed-off-by: Scott Wood <scottwood at freescale.com>
> ---
> v2: add -misel and -mno-strict-align
>
> arch/powerpc/cpu/mpc85xx/config.mk | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/cpu/mpc85xx/config.mkb/arch/powerpc/cpu/mpc85xx/
> config.mk
> index f36d823..450d511 100644
> --- a/arch/powerpc/cpu/mpc85xx/config.mk
> +++ b/arch/powerpc/cpu/mpc85xx/config.mk
> @@ -23,7 +23,8 @@
>
> PLATFORM_RELFLAGS += -meabi
>
> -PLATFORM_CPPFLAGS += -ffixed-r2 -Wa,-me500 -msoft-float -mno-string
> +PLATFORM_CPPFLAGS += -ffixed-r2 -mcpu=8540 -misel -mno-strict-align \
> + -Wa,-me500 -msoft-float -mno-string
>
> # -mspe=yes is needed to have -mno-spe accepted by a buggy GCC;
> # see "[PATCH,rs6000] make -mno-spe work as expected" on
> --
> 1.7.9.5
>
>
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