Add DMA header file which defines the DMA registers and add

testing_harness with fake environment to allow testing on x86
development machines.

1 files changed, 82 insertions, 0 deletions

diff --git a/02-usart/test_harness/test_harness.c b/02-usart/test_harness/test_harness.c
new file mode 100644
index 0000000..9f7dd79
--- /dev/null
+++ b/02-usart/test_harness/test_harness.c
@@ -0,0 +1,82 @@
+#include "test_harness.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <setjmp.h>
+
+
+static jmp_buf jmpbuf;
+
+volatile test_t dummy
+  __attribute((__section__("tests")))
+  __attribute((__used__)) = {
+  "dummy",
+  "dummy",
+  NULL
+};
+
+extern test_t __start_tests;
+extern test_t __stop_tests;
+
+test_t* iter = &__start_tests;
+
+static int execute_test(test_t* test);
+
+int main() {
+  for( ; iter < &__stop_tests; ++ iter) {
+    if (iter->fn_ptr != NULL) {
+      execute_test(iter);
+    }
+  }
+}
+
+void test_harness_abort(int ec)
+{
+  longjmp(jmpbuf, ec);
+  assert("Long jump failed.\n");
+}
+
+static int execute_test(test_t* test)
+{
+  char fullname[512];
+  int status;
+  int ec;
+  pid_t pid;
+  const char* note = "";
+
+  snprintf(
+      fullname, sizeof(fullname), "%s::%s", iter->test_suite, iter->test_name);
+
+  if (!(pid = fork())) {
+    // child
+
+    if ((ec = setjmp(jmpbuf))) {
+      exit(ec);
+    } else {
+      test->fn_ptr();
+      exit(0);
+    }
+  } else {
+    if (waitpid(pid, &status, 0) == -1) {
+      fprintf(stderr, "waitpid() failed\n");
+      return 1;
+    }
+
+    ec = WEXITSTATUS(status);
+    switch (ec) {
+      case 0:
+        printf("%s " GREEN "[PASS]" RESET "\n", fullname);
+        return 0;
+      case 11:
+        note = " (SIGSEGV)";
+        break;
+    }
+
+    printf("%s " RED "[FAIL] %d%s" RESET "\n", fullname, ec, note);
+    return ec;
+  }
+}