dd8a410eaf
The variable 'KERNEL_ARCH' is actually a normalized version of
'ARCH'/'BR2_ARCH'. For example, 'arcle' and 'arceb' both become 'arc', just
as all powerpc variants become 'powerpc'.
It is presumably called 'KERNEL_ARCH' because the Linux kernel is typically
the first place where support for a new architecture is added, and thus is
the entity that defines the normalized name.
However, the term 'KERNEL_ARCH' can also be interpreted as 'the architecture
used by the kernel', which need not be exactly the same as 'the normalized
name for a certain arch'. In particular, for cases where a 64-bit
architecture is running a 64-bit kernel but 32-bit userspace. Examples
include:
* aarch64 architecture, with aarch64 kernel and 32-bit (ARM) userspace
* x86_64 architecture, with x86_64 kernel and 32-bit (i386) userspace
In such cases, the 'architecture used by the kernel' needs to refer to the
64-bit name (aarch64, x86_64), whereas all userspace applications need to
refer the, potentially normalized, 32-bit name.
This means that there need to be two different variables:
KERNEL_ARCH: the architecture used by the kernel
NORMALIZED_ARCH: the normalized name for the current userspace architecture
At this moment, both will actually have the same content. But a subsequent
patch will add basic support for situations described above, in which
KERNEL_ARCH may become overwritten to the 64-bit architecture, while
NORMALIZED_ARCH needs to remain the same (32-bit) case.
This commit replaces use of KERNEL_ARCH where actually the userspace arch is
needed. Places that use KERNEL_ARCH in combination with building of kernel
modules are not touched.
There may be cases where a package builds both a kernel module as userspace,
in which case it may need to know about both KERNEL_ARCH and
NORMALIZED_ARCH, for the case where they differ. But this is to be fixed on
a per-need basis.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
[Arnout: Also rename BR2_KERNEL_ARCH to BR2_NORMALIZED_ARCH]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
213 lines
5.3 KiB
Plaintext
213 lines
5.3 KiB
Plaintext
config BR2_POWERPC_CPU_HAS_ALTIVEC
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bool
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config BR2_POWERPC_CPU_HAS_SPE
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bool
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choice
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prompt "Target Architecture Variant"
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default BR2_generic_powerpc
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help
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Specific CPU variant to use
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config BR2_generic_powerpc
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bool "generic"
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config BR2_powerpc_401
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bool "401"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_403
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bool "403"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_405
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bool "405"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_405fp
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bool "405 with FPU"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_440
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bool "440"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_440fp
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bool "440 with FPU"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_464
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bool "464"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_464fp
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bool "464 with FPU"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_476
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bool "476"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_476fp
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bool "476 with FPU"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_505
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bool "505"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_602
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bool "602"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_603
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bool "603"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_603e
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bool "603e"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_604
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bool "604"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_604e
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bool "604e"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_620
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bool "620"
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config BR2_powerpc_630
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bool "630"
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config BR2_powerpc_740
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bool "740"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_7400
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bool "7400"
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depends on !BR2_ARCH_IS_64
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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config BR2_powerpc_7450
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bool "7450"
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depends on !BR2_ARCH_IS_64
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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config BR2_powerpc_750
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bool "750"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_821
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bool "821"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_823
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bool "823"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_860
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bool "860"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_970
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bool "970"
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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config BR2_powerpc_8540
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bool "8540 / e500v1"
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depends on !BR2_ARCH_IS_64
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select BR2_POWERPC_CPU_HAS_SPE
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config BR2_powerpc_8548
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bool "8548 / e500v2"
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depends on !BR2_ARCH_IS_64
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select BR2_POWERPC_CPU_HAS_SPE
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config BR2_powerpc_e300c2
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bool "e300c2"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_e300c3
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bool "e300c3"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_e500mc
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bool "e500mc"
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depends on !BR2_ARCH_IS_64
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config BR2_powerpc_e5500
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bool "e5500"
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depends on !BR2_powerpc64le
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config BR2_powerpc_e6500
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bool "e6500"
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depends on !BR2_powerpc64le
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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config BR2_powerpc_power4
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bool "power4"
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config BR2_powerpc_power5
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bool "power5"
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config BR2_powerpc_power6
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bool "power6"
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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config BR2_powerpc_power7
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bool "power7"
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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config BR2_powerpc_power8
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bool "power8"
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select BR2_POWERPC_CPU_HAS_ALTIVEC
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endchoice
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choice
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prompt "Target ABI"
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default BR2_powerpc_SPE if BR2_POWERPC_CPU_HAS_SPE
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default BR2_powerpc_CLASSIC
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help
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Application Binary Interface to use
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config BR2_powerpc_CLASSIC
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bool "Classic"
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depends on !BR2_POWERPC_CPU_HAS_SPE
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config BR2_powerpc_SPE
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bool "SPE"
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depends on BR2_POWERPC_CPU_HAS_SPE
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endchoice
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config BR2_POWERPC_SOFT_FLOAT
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bool "Use soft-float"
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select BR2_SOFT_FLOAT
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help
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If your target CPU does not have a Floating Point Unit (FPU)
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or a kernel FPU emulator, but you still wish to support
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floating point functions, then everything will need to be
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compiled with soft floating point support (-msoft-float).
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config BR2_ARCH
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default "powerpc" if BR2_powerpc
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default "powerpc64" if BR2_powerpc64
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default "powerpc64le" if BR2_powerpc64le
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config BR2_NORMALIZED_ARCH
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default "powerpc"
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config BR2_ENDIAN
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default "BIG" if BR2_powerpc || BR2_powerpc64
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default "LITTLE" if BR2_powerpc64le
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config BR2_GCC_TARGET_CPU
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default "401" if BR2_powerpc_401
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default "403" if BR2_powerpc_403
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default "405" if BR2_powerpc_405
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default "405fp" if BR2_powerpc_405fp
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default "440" if BR2_powerpc_440
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default "440fp" if BR2_powerpc_440fp
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default "464" if BR2_powerpc_464
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default "464fp" if BR2_powerpc_464fp
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default "476" if BR2_powerpc_476
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default "476fp" if BR2_powerpc_476fp
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default "505" if BR2_powerpc_505
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default "602" if BR2_powerpc_602
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default "603" if BR2_powerpc_603
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default "603e" if BR2_powerpc_603e
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default "604" if BR2_powerpc_604
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default "604e" if BR2_powerpc_604e
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default "620" if BR2_powerpc_620
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default "630" if BR2_powerpc_630
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default "740" if BR2_powerpc_740
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default "7400" if BR2_powerpc_7400
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default "7450" if BR2_powerpc_7450
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default "750" if BR2_powerpc_750
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default "821" if BR2_powerpc_821
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default "823" if BR2_powerpc_823
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default "860" if BR2_powerpc_860
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default "970" if BR2_powerpc_970
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default "8540" if BR2_powerpc_8540
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default "8548" if BR2_powerpc_8548
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default "e300c2" if BR2_powerpc_e300c2
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default "e300c3" if BR2_powerpc_e300c3
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default "e500mc" if BR2_powerpc_e500mc
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default "e5500" if BR2_powerpc_e5500
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default "e6500" if BR2_powerpc_e6500
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default "power4" if BR2_powerpc_power4
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default "power5" if BR2_powerpc_power5
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default "power6" if BR2_powerpc_power6
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default "power7" if BR2_powerpc_power7
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default "power8" if BR2_powerpc_power8
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config BR2_READELF_ARCH_NAME
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default "PowerPC" if BR2_powerpc
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default "PowerPC64" if BR2_powerpc64 || BR2_powerpc64le
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# vim: ft=kconfig
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# -*- mode:kconfig; -*-
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