machine/corstone1000: Add Cortex‑A320 support

Enable the Corstone‑1000 Cortex‑A320 variant by:

- Introduce `machine/include/corstone1000-a320.inc` to configure the
  default Ethos‑U MAC count when `cortexa320` is in MACHINE_FEATURES,
  and allow override via `ETHOSU_NUM_MACS`.
- Add a KAS profile at `kas/corstone1000-a320.yml` for Cortex‑A320
  FVP-based builds.
- Extend corstone1000.inc to detect MACHINE_FEATURES (cortexa320) and
  pull in the matching tune-<core>.inc (default still Cortex-A35).
- Add the `meta-ethos` layer as a dependency of `meta-arm-bsp` for
  Cortex‑A320 builds and define a new KMachine override to pull in
  the Ethos‑U driver recipe.
- In `conf/machine/corstone1000-fvp.conf`, inspect `MACHINE_FEATURES`
  and set `FVP_EXE` to `FVP_Corstone-1000_with_Cortex-A320` when
  `cortexa320` is enabled, otherwise fall back to `FVP_Corstone-1000`.
- In `recipes-devtools/fvp/fvp-corstone1000.bb`, add a
  `SRC_URI:cortexa320` entry (with checksums) for the Cortex‑A320 FVP
  build archive.
- Disable the rootfs CPIO file compression so it is not compressed
  twice when bundled with the kernel

Signed-off-by: Michael Safwat <michael.safwat@arm.com>
Signed-off-by: Frazer Carsley <frazer.carsley@arm.com>
Signed-off-by: Hugues KAMBA MPIANA <hugues.kambampiana@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-bsp/conf/layer.conf

@@ -14,6 +14,7 @@ LAYERSERIES_COMPAT_meta-arm-bsp = "walnascar whinlatter"
 LAYERDEPENDS_meta-arm-bsp = "core meta-arm"
 # This won't be used by layerindex-fetch, but works everywhere else
 LAYERDEPENDS_meta-arm-bsp:append:corstone1000 = " meta-python openembedded-layer efi-secure-boot"
+LAYERDEPENDS_meta-arm-bsp:append:corstone1000:cortexa320 = " meta-ethos"
 LAYERDEPENDS_meta-arm-bsp:append:musca-b1 = " meta-python"
 LAYERDEPENDS_meta-arm-bsp:append:musca-s1 = " meta-python"
 

meta-arm-bsp/conf/machine/corstone1000-fvp.conf

@@ -6,6 +6,9 @@ require conf/machine/include/corstone1000.inc
 require ${@bb.utils.contains('MACHINE_FEATURES', 'corstone1000-extsys', \
     'conf/machine/include/corstone1000-extsys.inc', '', d)}
 
+require ${@bb.utils.contains('MACHINE_FEATURES', 'cortexa320', \
+    'conf/machine/include/corstone1000-a320.inc', '', d)}
+
 TFA_TARGET_PLATFORM = "fvp"
 
 TFM_PLATFORM_IS_FVP = "TRUE"
@@ -20,6 +23,7 @@ DEFAULT_TEST_SUITES:append = " fvp_boot fvp_devices"
 # FVP Config
 FVP_PROVIDER ?= "fvp-corstone1000-native"
 FVP_EXE ?= "FVP_Corstone-1000"
+FVP_EXE:cortexa320 = "FVP_Corstone-1000-A320"
 FVP_CONSOLES[default] = "host_terminal_0"
 FVP_CONSOLES[tf-a] = "host_terminal_1"
 FVP_CONSOLES[se] = "secenc_terminal"

meta-arm-bsp/conf/machine/include/corstone1000-a320.inc

@@ -0,0 +1,5 @@
+ETHOSU_NUM_MACS ?= "256"
+
+FVP_CONFIG[host.ethosu.num_macs] = "${ETHOSU_NUM_MACS}"
+
+IMAGE_INSTALL:append = " arm-npu-ethosu"

meta-arm-bsp/conf/machine/include/corstone1000.inc

@@ -1,4 +1,6 @@
-require conf/machine/include/arm/armv8a/tune-cortexa35.inc
+TUNE_FILE = "conf/machine/include/arm/armv8a/tune-cortexa35.inc"
+TUNE_FILE:cortexa320 = "conf/machine/include/arm/arch-armv9-2a.inc"
+require ${TUNE_FILE}
 
 MACHINEOVERRIDES =. "corstone1000:"
 

meta-arm-bsp/recipes-kernel/linux/files/corstone1000/defconfig

@@ -122,3 +122,4 @@ CONFIG_EXT4_FS=y
 # CONFIG_EXT4_FS_POSIX_ACL is not set
 # CONFIG_EXT4_FS_SECURITY is not set
 # CONFIG_EXT4_DEBUG is not set
+CONFIG_INITRAMFS_COMPRESSION_NONE=y

meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc

@@ -24,8 +24,6 @@ COMPATIBLE_MACHINE:corstone1000 = "${MACHINE}"
 KCONFIG_MODE:corstone1000 = "--alldefconfig"
 KMACHINE:corstone1000 = "corstone1000"
 LINUX_KERNEL_TYPE:corstone1000 = "standard"
-#disabling the rootfs cpio file compression so it is not compressed twice when bundled with the kernel
-KERNEL_EXTRA_ARGS:corstone1000 += "CONFIG_INITRAMFS_COMPRESSION_NONE=y"
 SRC_URI:append:corstone1000 = " \
            file://defconfig  \
         "
@@ -57,6 +55,26 @@ SRC_URI:append:corstone1000 = " \
 KERNEL_EXTRA_FEATURES:corstone1000 = ""
 KERNEL_FEATURES:corstone1000 = ""
 
+#
+# Corstone1000 with CORTEX-A320 KMACHINE
+#
+FILESEXTRAPATHS:prepend:cortexa320 := "${ARMBSPFILESPATHS}"
+COMPATIBLE_MACHINE:corstone1000:cortexa320 = "${MACHINE}"
+KCONFIG_MODE:corstone1000:cortexa320 = "--alldefconfig"
+KMACHINE:corstone1000:cortexa320 = "corstone1000-a320"
+LINUX_KERNEL_TYPE:corstone1000:cortexa320 = "standard"
+SRC_URI:append:corstone1000:cortexa320 = " \
+    file://defconfig  \
+"
+
+# Default kernel features not needed for Corstone-1000 with
+# Cortex-A320; otherwise the extra kernel modules will
+# increase the rootfs size but the board has limited flash
+# memory constraints
+KERNEL_EXTRA_FEATURES:corstone1000:cortexa320 = ""
+KERNEL_FEATURES:corstone1000:cortexa320 = ""
+
+
 #
 # FVP BASE KMACHINE
 #