Merge pull request #964 from abrodkin/topic-arc

Add ARC architecture support

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

samples/arc-arc700-linux-uclibc/crosstool.config

@@ -0,0 +1,7 @@
+CT_ARCH_ARC=y
+CT_TARGET_ALIAS="arc-linux"
+CT_TARGET_CFLAGS="-matomic"
+CT_TARGET_VENDOR="snps"
+CT_KERNEL_LINUX=y
+CT_LIBC_UCLIBC=y
+CT_ARCH_CPU="arc700"

samples/arc-arc700-linux-uclibc/reported.by

@@ -0,0 +1,3 @@
+reporter_name="Alexey Brodkin"
+reporter_url="http://embarc.org"
+reporter_comment="ARCompact default Linux toolchain"

samples/arc-archs-linux-uclibc/crosstool.config

@@ -0,0 +1,7 @@
+CT_ARCH_ARC=y
+CT_TARGET_ALIAS="arc-linux"
+CT_TARGET_CFLAGS="-matomic"
+CT_TARGET_VENDOR="snps"
+CT_KERNEL_LINUX=y
+CT_LIBC_UCLIBC=y
+CT_ARCH_CPU="hs38"

samples/arc-archs-linux-uclibc/reported.by

@@ -0,0 +1,3 @@
+reporter_name="Alexey Brodkin"
+reporter_url="http://embarc.org"
+reporter_comment="ARCv2 default Linux toolchain"

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
+}