Merge branch 'fmorgner/develop-SA-FS26/kernel-bht' into 'develop-BA-FS26'

Add experimental support for kernel tests

See merge request teachos/kernel!20

1 files changed, 41 insertions, 0 deletions

diff --git a/kernel/src/test_support/kapi/cpu.cpp b/kernel/src/test_support/kapi/cpu.cpp
new file mode 100644
index 0000000..6592d15
--- /dev/null
+++ b/kernel/src/test_support/kapi/cpu.cpp
@@ -0,0 +1,41 @@
+#include "kernel/test_support/cpu.hpp"
+
+#include <kapi/cpu.hpp>
+
+#include <atomic>
+#include <stdexcept>
+
+namespace kapi::cpu
+{
+
+  namespace
+  {
+    auto static initialized = std::atomic_flag{};
+  }
+
+  auto reset() -> void
+  {
+    if (!initialized.test())
+    {
+      throw std::logic_error{"kapi::cpu::reset() called before kapi::cpu::init()"};
+    }
+
+    initialized.clear();
+  }
+
+  auto init() -> void
+  {
+    if (initialized.test_and_set())
+    {
+      throw std::logic_error("kapi::cpu::init() called more than once");
+    }
+
+    // TODO: make sure that simulated interrupt can run.
+  }
+
+  auto halt() -> void
+  {
+    throw kernel::tests::cpu::halt{};
+  }
+
+}  // namespace kapi::cpu
\ No newline at end of file