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arch/arm: add the Cortex-A78 core

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This commit adds the Cortex-A78 core, which is a armv8.2a ISA.
See: [1] [2].

This CPU support was added in GCC 11. See [3] [4].

Buildroot commit 771da1dd9 "configs/nvidia_bf3_defconfig: new
defconfig" [5] added the first defconfig for a board including
this CPU.

[1] https://developer.arm.com/Processors/Cortex-A78
[2] https://developer.arm.com/documentation/101430/0102/Functional-description/Introduction/About-the-core
[3] https://gcc.gnu.org/gcc-11/changes.html
[4] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/aarch64/aarch64-cores.def;hb=releases/gcc-11.1.0#l98
[5] 771da1dd9b

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Julien Olivain
2024-11-03 22:30:01 +01:00
committed by Thomas Petazzoni
parent 073ea145df
commit f4690c2bfd
1 changed files with 9 additions and 0 deletions
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9
arch/Config.in.arm
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@@ -466,6 +466,14 @@ config BR2_cortex_a76_a55
select BR2_ARM_CPU_HAS_FP_ARMV8
select BR2_ARM_CPU_ARMV8A
select BR2_ARCH_NEEDS_GCC_AT_LEAST_9
config BR2_cortex_a78
bool "cortex-A78"
select BR2_ARM_CPU_HAS_ARM if !BR2_ARCH_IS_64
select BR2_ARM_CPU_HAS_NEON if !BR2_ARCH_IS_64
select BR2_ARM_CPU_HAS_THUMB2 if !BR2_ARCH_IS_64
select BR2_ARM_CPU_HAS_FP_ARMV8
select BR2_ARM_CPU_ARMV8A
select BR2_ARCH_NEEDS_GCC_AT_LEAST_11
config BR2_neoverse_n1
bool "neoverse-N1 (aka ares)"
select BR2_ARM_CPU_HAS_ARM if !BR2_ARCH_IS_64
@@ -876,6 +884,7 @@ config BR2_GCC_TARGET_CPU
default "cortex-a75.cortex-a55" if BR2_cortex_a75_a55
default "cortex-a76" if BR2_cortex_a76
default "cortex-a76.cortex-a55" if BR2_cortex_a76_a55
default "cortex-a78" if BR2_cortex_a78
default "neoverse-n1" if BR2_neoverse_n1
default "tsv110" if BR2_tsv110
# armv8.4a