[Buildroot] [PATCH next 4/4] arch/arm: add the Neoverse-V3AE core

[Julien Olivain]

This commit adds the Neoverse-V3AE (Automotive Enhanced) core, which
is an armv9.2a ISA. See: [1] [2].

This CPU support was added in GCC 15. See [3] [4] [5].

This CPU supports Aarch64 only at all exception levels (EL0 to EL3).

This CPU is present in NVIDIA Jetson Thor / Tegra T264 [6].

[1] https://developer.arm.com/Processors/Neoverse%20V3AE
[2] https://developer.arm.com/documentation/101595/0002/The-Neoverse-V3AE--core/Neoverse-V3AE--core-features
[3] https://gcc.gnu.org/gcc-15/changes.html#aarch64
[4] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/aarch64/aarch64-cores.def;hb=releases/gcc-15.1.0#l222
[5] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=7ca2a803c4a0d8e894f0b36625a2c838c54fb4cd
[6] https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-thor/

Signed-off-by: Julien Olivain <ju.o at free.fr>
---
 arch/Config.in.arm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index ff301785e5..eb5babe29b 100644
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -544,6 +544,12 @@ config BR2_neoverse_v3
 	select BR2_ARM_CPU_HAS_FP_ARMV8
 	select BR2_ARM_CPU_ARMV9A
 	select BR2_ARCH_NEEDS_GCC_AT_LEAST_15
+config BR2_neoverse_v3ae
+	bool "neoverse-V3AE (aka poseidon)"
+	depends on BR2_ARCH_IS_64
+	select BR2_ARM_CPU_HAS_FP_ARMV8
+	select BR2_ARM_CPU_ARMV9A
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_15
 endchoice
 
 config BR2_ARM_ENABLE_NEON
@@ -945,6 +951,7 @@ config BR2_GCC_TARGET_CPU
 	# armv9.2a
 	default "cortex-a720"	if BR2_cortex_a720
 	default "neoverse-v3"	if BR2_neoverse_v3
+	default "neoverse-v3ae"	if BR2_neoverse_v3ae
 
 config BR2_GCC_TARGET_ABI
 	default "aapcs-linux"	if BR2_arm || BR2_armeb
-- 
2.53.0