# Copyright 2023 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/pigweed.gni")

import("$dir_pigweed/third_party/ambiq/ambiq.gni")
import("$dir_pw_build/error.gni")
import("$dir_pw_build/linker_script.gni")
import("$dir_pw_build/target_types.gni")
import("$dir_pw_cpu_exception/backend.gni")
import("$dir_pw_docgen/docs.gni")
import("$dir_pw_malloc/backend.gni")
import("$dir_pw_system/backend.gni")
import("$dir_pw_toolchain/generate_toolchain.gni")
import("target_toolchains.gni")

generate_toolchains("target_toolchains") {
  toolchains = pw_target_toolchain_apollo4_list
}

pw_build_assert("check_ambiq_product_defined") {
  condition = pw_third_party_ambiq_PRODUCT == "apollo4p" ||
              pw_third_party_ambiq_PRODUCT == "apollo4b"
  message = "Build argument pw_third_party_ambiq_PRODUCT must be one of " +
            "the following values: 'apollo4p' or 'apollo4b'."
  visibility = [ ":*" ]
}

config("disable_warnings") {
  cflags = [ "-Wno-undef" ]
  visibility = [ ":*" ]
}

config("pw_malloc_active") {
  if (pw_malloc_BACKEND != "") {
    defines = [ "PW_MALLOC_ACTIVE=1" ]
  } else {
    defines = [ "PW_MALLOC_ACTIVE=0" ]
  }
}

config("pw_system_active") {
  if (pw_system_TARGET_HOOKS_BACKEND != "") {
    ldflags = [
      "-Wl,--defsym=SysTick_Handler=xPortSysTickHandler",
      "-Wl,--defsym=PendSV_Handler=xPortPendSVHandler",
      "-Wl,--defsym=SVC_Handler=vPortSVCHandler",
    ]
  }
}

config("pw_cpu_exception_active") {
  if (pw_cpu_exception_ENTRY_BACKEND != "") {
    ldflags = [
      "-Wl,--defsym=HardFault_Handler=pw_cpu_exception_Entry",
      "-Wl,--defsym=MemManage_Handler=pw_cpu_exception_Entry",
      "-Wl,--defsym=BusFault_Handler=pw_cpu_exception_Entry",
      "-Wl,--defsym=UsageFault_Handler=pw_cpu_exception_Entry",
      "-Wl,--defsym=NMI_Handler=pw_cpu_exception_Entry",
    ]
  }
}

if (current_toolchain != default_toolchain) {
  pw_source_set("boot") {
    public_configs = [ ":pw_malloc_active" ]

    all_dependent_configs = [
      ":pw_system_active",
      ":pw_cpu_exception_active",
    ]

    public_deps = [ "$dir_pw_third_party/ambiq:sdk" ]

    deps = [
      ":check_ambiq_product_defined",
      "$dir_pw_boot",
      "$dir_pw_boot_cortex_m",
      "$dir_pw_preprocessor",
      "$dir_pw_sys_io_ambiq_sdk",
    ]

    if (pw_malloc_BACKEND != "") {
      deps += [ "$dir_pw_malloc" ]
    }

    sources = [
      "boot.cc",
      "vector_table.c",
    ]
  }
}

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