Add ARC architecture support

Synopsys' DesignWare ARC Processors are a family of 32-bit CPUs
that SoC designers can optimize for a wide range of uses,
from deeply embedded to high-performance host applications in a variety
of market segments.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

2 files changed, 49 insertions, 0 deletions

diff --git a/config/arch/arc.in b/config/arch/arc.in
new file mode 100644
index 00000000..fc4e64fb
--- /dev/null
+++ b/config/arch/arc.in
@@ -0,0 +1,15 @@
+# ARC specific configuration file
+
+## no-package
+## select ARCH_SUPPORTS_32
+## select ARCH_DEFAULT_32
+## select ARCH_SUPPORTS_BOTH_MMU
+## select ARCH_DEFAULT_HAS_MMU
+## select ARCH_SUPPORTS_EITHER_ENDIAN
+## select ARCH_DEFAULT_LE
+## select ARCH_SUPPORTS_WITH_CPU
+## select GCC_REQUIRE_7_or_later
+## select BINUTILS_REQUIRE_2_30_or_later
+##
+## help The Synopsys DesignWare ARC architecture, see more info here:
+## help     https://www.synopsys.com/designware-ip/processor-solutions/arc-processors.html
diff --git a/scripts/build/arch/arc.sh b/scripts/build/arch/arc.sh
new file mode 100644
index 00000000..fb9d93b6
--- /dev/null
+++ b/scripts/build/arch/arc.sh
@@ -0,0 +1,34 @@
+# Compute ARC-specific values
+
+CT_DoArchTupleValues() {
+    # The architecture part of the tuple:
+    CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_SUFFIX:-${target_endian_eb}}"
+
+    # The system part of the tuple:
+    case "${CT_LIBC}" in
+        glibc)    CT_TARGET_SYS=gnu;;
+        uClibc)   CT_TARGET_SYS=uclibc;;
+    esac
+}
+
+CT_DoArchUClibcConfig() {
+    local cfg="${1}"
+
+    CT_DoArchUClibcSelectArch "${cfg}" "arc"
+}
+
+CT_DoArchUClibcCflags() {
+    local cfg="${1}"
+    local cflags="${2}"
+    local f
+
+    CT_KconfigDeleteOption "CONFIG_ARC_HAS_ATOMICS" "${cfg}"
+
+    for f in ${cflags}; do
+        case "${f}" in
+            -matomic)
+                CT_KconfigEnableOption "CONFIG_ARC_HAS_ATOMICS" "${cfg}"
+                ;;
+        esac
+    done
+}