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arch/arm: add big.LITTLE cpu variants

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The big.LITTLE configurations can be optimised for by gcc, and a few
users wonder what they should choose when they have such CPUs.

Add new entries for those big.LITTLE configurations.

Note: the various combos were added in various gcc versions, but only
really worked in later versions:

    Variant   | Introduced in | First built in
    ----------+---------------+----------------
    a15-a7    | 4.9           | 4.9
    a17-a7    | 5             | 5
    a57-a53   | 4.9           | 6
    a72-a53   | 5             | 6

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN
2017-07-09 11:30:00 +02:00
committed by Thomas Petazzoni
parent e734c63387
commit 78c2a9f763
4 changed files with 48 additions and 1 deletions
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5
package/gcc/Config.in.host
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@@ -25,7 +25,8 @@ config BR2_GCC_VERSION_4_9_X
# Broken or unsupported architectures
depends on !BR2_arc && !BR2_bfin && !BR2_or1k
# Broken or unsupported ARM cores
depends on !BR2_cortex_a17 && !BR2_cortex_a72
depends on !BR2_cortex_a17 && !BR2_cortex_a17_a7
depends on !BR2_cortex_a72 && !BR2_cortex_a72_a53
# Unsupported MIPS cores
depends on !BR2_mips_interaptiv
# Unsupported for MIPS R5
@@ -45,6 +46,8 @@ config BR2_GCC_VERSION_5_X
bool "gcc 5.x"
# Broken or unsupported architectures
depends on !BR2_arc && !BR2_bfin && !BR2_or1k
# Broken or unsupported ARM cores
depends on !BR2_cortex_a57_a53 && !BR2_cortex_a72_a53
# musl ppc64 unsupported
depends on !(BR2_TOOLCHAIN_USES_MUSL && (BR2_powerpc64 || BR2_powerpc64le))
# Unsupported MIPS cores