# Copyright 2022 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

import("//build_overrides/pi_pico.gni")
import("//build_overrides/pigweed.gni")

import("$dir_pw_build/target_types.gni")
import("$dir_pw_docgen/docs.gni")
import("$dir_pw_system/system_target.gni")
import("$dir_pw_toolchain/arm_gcc/toolchains.gni")
import("$dir_pw_toolchain/generate_toolchain.gni")

declare_args() {
  pw_targets_ENABLE_RP2040_TEST_RUNNER = false
}

if (current_toolchain != default_toolchain) {
  pw_source_set("pre_init") {
    remove_configs = [ "$dir_pw_build:strict_warnings" ]

    deps = [
      "$PICO_ROOT/src/common/pico_base",
      "$PICO_ROOT/src/common/pico_stdlib",
      "$PICO_ROOT/src/rp2_common/pico_malloc",
      "$dir_pw_string",
      "$dir_pw_system",
      "$dir_pw_third_party/freertos",
      "$dir_pw_third_party/freertos:support",
    ]
    sources = [ "boot.cc" ]
  }

  config("config_includes") {
    include_dirs = [ "config" ]
  }

  config("module_config_include") {
    cflags = [
      "-include",
      rebase_path("config/pigweed_module_config.h", root_build_dir),
    ]
    visibility = [ ":*" ]
  }

  pw_source_set("module_config") {
    public_configs = [ ":module_config_include" ]
  }

  config("rp2040_hal_config") {
    inputs = [ "config/rp2040_hal_config.h" ]
    cflags = [ "-include" +
               rebase_path("config/rp2040_hal_config.h", root_build_dir) ]
  }

  pw_source_set("rp2040_freertos_config") {
    public_configs = [ ":config_includes" ]
    public_deps = [ "$dir_pw_third_party/freertos:config_assert" ]
    public = [ "config/FreeRTOSConfig.h" ]
  }

  pw_source_set("unit_test_app") {
    sources = [ "unit_test_app.cc" ]
    deps = [
      "$dir_pw_status",
      "$dir_pw_system",
      "$dir_pw_unit_test:rpc_service",
    ]
  }

  # We don't want this linked into the boot_stage2 binary, so make the printf
  # float config a source set added to pw_build_LINK_DEPS (which is dropped on
  # the boot_stage2 binary) rather than as a default_config.
  pw_source_set("float_printf_adapter") {
    all_dependent_configs = [ "$dir_pw_toolchain/arm_gcc:enable_float_printf" ]
  }
}

pw_system_target("rp2040") {
  cpu = PW_SYSTEM_CPU.CORTEX_M0PLUS
  scheduler = PW_SYSTEM_SCHEDULER.FREERTOS
  use_pw_malloc = false
  global_configs = [ ":rp2040_hal_config" ]

  build_args = {
    pw_build_DEFAULT_MODULE_CONFIG = get_path_info(":module_config", "abspath")
    pw_build_EXECUTABLE_TARGET_TYPE = "pico_executable"
    pw_build_EXECUTABLE_TARGET_TYPE_FILE =
        get_path_info("$dir_pigweed/targets/rp2040/pico_executable.gni",
                      "abspath")

    pw_log_BACKEND = dir_pw_log_tokenized
    pw_log_tokenized_HANDLER_BACKEND = "$dir_pw_system:log_backend.impl"

    pw_third_party_freertos_CONFIG =
        "$dir_pigweed/targets/rp2040:rp2040_freertos_config"
    pw_third_party_freertos_PORT = "$dir_pw_third_party/freertos:arm_cm0"

    pw_sys_io_BACKEND = dir_pw_sys_io_stdio
    pw_build_LINK_DEPS += [
      "$dir_pigweed/targets/rp2040:pre_init",
      "$dir_pw_assert:impl",
      "$dir_pw_log:impl",
      get_path_info(":float_printf_adapter", "abspath"),
    ]

    # ONLY RELEVANT FOR UNIT TESTS.
    if (pw_targets_ENABLE_RP2040_TEST_RUNNER) {
      _test_runner_script =
          "//targets/rp2040/py/rp2040_utils/unit_test_client.py"
      pw_unit_test_AUTOMATIC_RUNNER =
          get_path_info(_test_runner_script, "abspath")
    }
    pw_unit_test_MAIN = "$dir_pigweed/targets/rp2040:unit_test_app"
  }
}

pw_doc_group("target_docs") {
  sources = [ "target_docs.rst" ]
}