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Re: [PATCH] arch/aarch64: Add aarch64 support


On 31 December 2013 06:08, Yann E. MORIN <yann.morin.1998@free.fr> wrote:
> Zhenqiang, All,
>
> On 2013-12-17 10:12 +0800, Zhenqiang Chen spake thusly:
>> # HG changeset patch
>> # User Zhenqiang Chen <zhenqiang.chen@linaro.org>
>> # Date 1387172069 -28800
>> # Node ID 2cdf83834419f2918e36f7eae5915aa32c3254b6
>> # Parent  032ebcc89c96f29873070f2d9af6a0260cf2e40e
>> arch/aarch64: Add aarch64 support
>
> I think it'd be better if that was added as the 64-bit variant for the
> ARM architecture.
>
> But that would first need that:
>   - we define CT_LINUX_ARCH globally, default to CT_ARCH
>   - we add the 64-bit variant to both arn.in and arm.sh
>
> I'll handle this.

Thank you!

> I guess this requires very recent versions of gcc/binutils/glibc, right?

Yip.
gcc: 4.8 or later
binutils: 2.23 or later
eglibc: 2.17 or later
linux: 3.7 or later
Newlib: 2.0.0 or later

Thanks!
-Zhenqiang

> Thanks for the submission! :-)
>
> Regards,
> Yann E. MORIN.
>
>> Signed-off-by: Michael Hope <michael.hope@linaro.org>
>> Signed-off-by: Zhenqiang Chen <zhenqiang.chen@linaro.org>
>>
>> diff -r 032ebcc89c96 -r 2cdf83834419 config/arch/aarch64.in
>> --- /dev/null    Thu Jan 01 00:00:00 1970 +0000
>> +++ b/config/arch/aarch64.in    Mon Dec 16 13:34:29 2013 +0800
>> @@ -0,0 +1,13 @@
>> +# ARM AArch64 specific configuration file
>> +
>> +## select ARCH_SUPPORTS_64
>> +## select ARCH_DEFAULT_64
>> +## select ARCH_DEFAULT_HAS_MMU
>> +## select ARCH_SUPPORTS_BOTH_ENDIAN
>> +## select ARCH_DEFAULT_LE
>> +## select ARCH_SUPPORTS_WITH_ARCH
>> +## select ARCH_SUPPORTS_WITH_CPU
>> +## select ARCH_SUPPORTS_WITH_TUNE
>> +##
>> +## help The ARM AArch64 architecture, as defined by:
>> +## help     http://www.arm.com/
>> diff -r 032ebcc89c96 -r 2cdf83834419 scripts/build/arch/aarch64.sh
>> --- /dev/null    Thu Jan 01 00:00:00 1970 +0000
>> +++ b/scripts/build/arch/aarch64.sh    Mon Dec 16 13:34:29 2013 +0800
>> @@ -0,0 +1,11 @@
>> +# Compute ARM-specific values
>> +
>> +CT_DoArchTupleValues() {
>> +    # The architecture part of the tuple:
>> +    [ "${CT_ARCH_BE}" = "y" ] && target_endian_eb="_be"
>> +    CT_TARGET_ARCH="${CT_ARCH}${target_endian_eb}"
>> +    CT_ARCH_WITH_FLOAT=
>> +    CT_ARCH_FLOAT_CFLAG=
>> +    # On Linux the architecture is arm64
>> +    CT_LINUX_ARCH=arm64
>> +}
>> diff -r 032ebcc89c96 -r 2cdf83834419 scripts/build/kernel/linux.sh
>> --- a/scripts/build/kernel/linux.sh    Fri Nov 22 00:34:49 2013 +0100
>> +++ b/scripts/build/kernel/linux.sh    Mon Dec 16 13:34:29 2013 +0800
>> @@ -97,6 +97,7 @@
>>  # Install kernel headers using headers_install from kernel sources.
>>  do_kernel_install() {
>>      local kernel_path
>> +    local arch=${CT_LINUX_ARCH:-${CT_ARCH}}
>>
>>      CT_DoLog DEBUG "Using kernel's headers_install"
>>
>> @@ -112,7 +113,7 @@
>>      CT_DoExecLog ALL                                    \
>>      make -C "${kernel_path}"                            \
>>           O="${CT_BUILD_DIR}/build-kernel-headers"       \
>> -         ARCH=${CT_ARCH}                                \
>> +         ARCH=${arch}                                   \
>>           INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \
>>           ${V_OPT}                                       \
>>           headers_install
>> @@ -122,7 +123,7 @@
>>          CT_DoExecLog ALL                                    \
>>          make -C "${kernel_path}"                            \
>>               O="${CT_BUILD_DIR}/build-kernel-headers"       \
>> -             ARCH=${CT_ARCH}                                \
>> +             ARCH=${arch}                                   \
>>               INSTALL_HDR_PATH="${CT_SYSROOT_DIR}/usr"       \
>>               ${V_OPT}                                       \
>>               headers_check
>
> --
> .-----------------.--------------------.------------------.--------------------.
> |  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
> | +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
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> | http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
> '------------------------------^-------^------------------^--------------------'

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