Add toolchain definition for coreboot-sdk

Add a toolchain definition for coreboot-sdk, so that volteer can build
with coreboot-sdk instead by adding -t coreboot-sdk to the "zmake
configure".

BUG=b:175248887
TEST=zmake configure -b -t coreboot-sdk -B $(mktemp -d) \
         projects/experimental/volteer

Change-Id: I1ac9dbf96d893846077e9a7cdc970f57d7a4890d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/zephyr-chrome/+/2583409
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2630159
Reviewed-by: Simon Glass <sjg@chromium.org>

7 files changed, 83 insertions, 0 deletions

diff --git a/zephyr/cmake/bintools/gnu/target.cmake b/zephyr/cmake/bintools/gnu/target.cmake
new file mode 100644
index 0000000000..2ec9d075dc
--- /dev/null
+++ b/zephyr/cmake/bintools/gnu/target.cmake
@@ -0,0 +1,7 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Zephyr cmake system looks into ${TOOLCHAIN_ROOT}, but we just send
+# this out to the copy in ${ZEPHYR_BASE}.
+include("${ZEPHYR_BASE}/cmake/bintools/gnu/target.cmake")
diff --git a/zephyr/cmake/compiler/gcc/compiler_flags.cmake b/zephyr/cmake/compiler/gcc/compiler_flags.cmake
new file mode 100644
index 0000000000..125f909c87
--- /dev/null
+++ b/zephyr/cmake/compiler/gcc/compiler_flags.cmake
@@ -0,0 +1,7 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Zephyr cmake system looks into ${TOOLCHAIN_ROOT}, but we just send
+# this out to the copy in ${ZEPHYR_BASE}.
+include("${ZEPHYR_BASE}/cmake/compiler/gcc/compiler_flags.cmake")
diff --git a/zephyr/cmake/compiler/gcc/target.cmake b/zephyr/cmake/compiler/gcc/target.cmake
new file mode 100644
index 0000000000..39e5839eba
--- /dev/null
+++ b/zephyr/cmake/compiler/gcc/target.cmake
@@ -0,0 +1,7 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Zephyr cmake system looks into ${TOOLCHAIN_ROOT}, but we just send
+# this out to the copy in ${ZEPHYR_BASE}.
+include("${ZEPHYR_BASE}/cmake/compiler/gcc/target.cmake")
diff --git a/zephyr/cmake/linker/ld/linker_flags.cmake b/zephyr/cmake/linker/ld/linker_flags.cmake
new file mode 100644
index 0000000000..c80d1d2452
--- /dev/null
+++ b/zephyr/cmake/linker/ld/linker_flags.cmake
@@ -0,0 +1,7 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Zephyr cmake system looks into ${TOOLCHAIN_ROOT}, but we just send
+# this out to the copy in ${ZEPHYR_BASE}.
+include("${ZEPHYR_BASE}/cmake/linker/ld/linker_flags.cmake")
diff --git a/zephyr/cmake/linker/ld/target.cmake b/zephyr/cmake/linker/ld/target.cmake
new file mode 100644
index 0000000000..0e2ad1f4d7
--- /dev/null
+++ b/zephyr/cmake/linker/ld/target.cmake
@@ -0,0 +1,7 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Zephyr cmake system looks into ${TOOLCHAIN_ROOT}, but we just send
+# this out to the copy in ${ZEPHYR_BASE}.
+include("${ZEPHYR_BASE}/cmake/linker/ld/target.cmake")
diff --git a/zephyr/cmake/toolchain/coreboot-sdk/generic.cmake b/zephyr/cmake/toolchain/coreboot-sdk/generic.cmake
new file mode 100644
index 0000000000..7f5f6d3df5
--- /dev/null
+++ b/zephyr/cmake/toolchain/coreboot-sdk/generic.cmake
@@ -0,0 +1,17 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# generic.cmake is used for host-side compilation and preprocessing
+# (e.g., for device-tree).  Thus, we should use LLVM for this
+# actually, as that's what's currently supported compiler-wise in the
+# chroot right now.
+
+set(CMAKE_C_COMPILER "/usr/bin/x86_64-pc-linux-gnu-clang")
+
+set(CMAKE_AR         "/usr/bin/llvm-ar")
+set(CMAKE_NM         "/usr/bin/llvm-nm")
+set(CMAKE_OBJCOPY    "/usr/bin/llvm-objcopy")
+set(CMAKE_OBJDUMP    "/usr/bin/llvm-objdump")
+set(CMAKE_RANLIB     "/usr/bin/llvm-ar")
+set(CMAKE_READELF    "/usr/bin/llvm-readelf")
diff --git a/zephyr/cmake/toolchain/coreboot-sdk/target.cmake b/zephyr/cmake/toolchain/coreboot-sdk/target.cmake
new file mode 100644
index 0000000000..cf3a6ec736
--- /dev/null
+++ b/zephyr/cmake/toolchain/coreboot-sdk/target.cmake
@@ -0,0 +1,31 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Coreboot SDK uses GCC
+set(COMPILER gcc)
+set(LINKER ld)
+set(BINTOOLS gnu)
+
+# Mapping of Zephyr architecture -> coreboot-sdk toolchain
+set(CROSS_COMPILE_TARGET_arm    arm-eabi)
+set(CROSS_COMPILE_TARGET_riscv  riscv64-elf)
+set(CROSS_COMPILE_TARGET_x86    i386-elf)
+
+set(CROSS_COMPILE_TARGET        ${CROSS_COMPILE_TARGET_${ARCH}})
+
+if("${ARCH}" STREQUAL "arm" AND CONFIG_ARM64)
+  set(CROSS_COMPILE_TARGET      aarch64-elf)
+elseif("${ARCH}" STREQUAL "x86" AND CONFIG_X86_64)
+  set(CROSS_COMPILE_TARGET      x86_64-elf)
+endif()
+
+set(CC gcc)
+set(CROSS_COMPILE "/opt/coreboot-sdk/bin/${CROSS_COMPILE_TARGET}-")
+
+set(CMAKE_AR         "${CROSS_COMPILE}ar")
+set(CMAKE_NM         "${CROSS_COMPILE}nm")
+set(CMAKE_OBJCOPY    "${CROSS_COMPILE}objcopy")
+set(CMAKE_OBJDUMP    "${CROSS_COMPILE}objdump")
+set(CMAKE_RANLIB     "${CROSS_COMPILE}ranlib")
+set(CMAKE_READELF    "${CROSS_COMPILE}readelf")