build: factor out kernel API

5 files changed, 85 insertions, 0 deletions

diff --git a/kapi/CMakeLists.txt b/kapi/CMakeLists.txt
new file mode 100644
index 0000000..a3cd040
--- /dev/null
+++ b/kapi/CMakeLists.txt
@@ -0,0 +1,27 @@
+add_library("kapi" OBJECT)
+add_library("api::kapi" ALIAS "kapi")
+
+target_sources("kapi" PUBLIC
+    FILE_SET HEADERS
+    BASE_DIRS "include"
+    FILES
+    "include/kapi/io.hpp"
+    "include/kapi/memory.hpp"
+    "include/kapi/system.hpp"
+)
+
+target_sources("kapi" PRIVATE
+    "src/system.cpp"
+)
+
+target_include_directories("kapi" PUBLIC
+    "include"
+)
+
+target_link_libraries("kapi" PUBLIC
+    "libs::kstd"
+
+    "c"
+    "gcc"
+    "stdc++"
+)
diff --git a/kapi/include/kapi/io.hpp b/kapi/include/kapi/io.hpp
new file mode 100644
index 0000000..764738f
--- /dev/null
+++ b/kapi/include/kapi/io.hpp
@@ -0,0 +1,17 @@
+#ifndef TEACHOS_KAPI_IO_HPP
+#define TEACHOS_KAPI_IO_HPP
+
+#include <string_view>
+
+namespace teachos::io
+{
+  auto init() -> void;
+
+  auto print(std::string_view text) -> void;
+  auto println(std::string_view text) -> void;
+
+  auto print_error(std::string_view text) -> void;
+  auto println_error(std::string_view text) -> void;
+}  // namespace teachos::io
+
+#endif
diff --git a/kapi/include/kapi/memory.hpp b/kapi/include/kapi/memory.hpp
new file mode 100644
index 0000000..842a2fa
--- /dev/null
+++ b/kapi/include/kapi/memory.hpp
@@ -0,0 +1,9 @@
+#ifndef TEACHOS_KAPI_MEMORY_HPP
+#define TEACHOS_KAPI_MEMORY_HPP
+
+namespace teachos::memory
+{
+  auto init() -> void;
+}
+
+#endif
diff --git a/kapi/include/kapi/system.hpp b/kapi/include/kapi/system.hpp
new file mode 100644
index 0000000..0d4f2c9
--- /dev/null
+++ b/kapi/include/kapi/system.hpp
@@ -0,0 +1,14 @@
+#ifndef TEACHOS_KAPI_SYSTEM_HPP
+#define TEACHOS_KAPI_SYSTEM_HPP
+
+#include <source_location>
+#include <string_view>
+
+namespace teachos::system
+{
+  [[noreturn]] auto halt() -> void;
+
+  [[noreturn]] auto panic(std::string_view message, std::source_location = std::source_location::current()) -> void;
+}  // namespace teachos::system
+
+#endif
diff --git a/kapi/src/system.cpp b/kapi/src/system.cpp
new file mode 100644
index 0000000..c3b1c5e
--- /dev/null
+++ b/kapi/src/system.cpp
@@ -0,0 +1,18 @@
+#include "kapi/system.hpp"
+
+#include "kapi/io.hpp"
+
+namespace teachos::system
+{
+
+  auto panic(std::string_view message, std::source_location location) -> void
+  {
+    io::println_error("!!!Kernel Panic!!! ");
+    io::println_error(message);
+    io::println_error(location.file_name());
+    io::println_error(location.function_name());
+
+    halt();
+  }
+
+}  // namespace teachos::system