add (not yet fully working - it can only send through uart now) interrupt-driven uart together with "scheduler"

1 files changed, 32 insertions, 0 deletions

diff --git a/scheduler.h b/scheduler.h
new file mode 100644
index 0000000..8c0f569
--- /dev/null
+++ b/scheduler.h
@@ -0,0 +1,32 @@
+#ifndef SCHEDULER_H
+#define SCHEDULER_H
+
+#include <stdint.h>
+
+#include "psr.h"
+
+extern PSR_t PL1_PSR;
+
+void setup_scheduler_structures(void);
+
+// to be called by irq handler when respective uart interrupt happens
+void scheduler_try_output(void);
+
+// to be called by irq handler when respective uart interrupt happens
+void scheduler_try_input(void);
+
+void __attribute__((noreturn))
+schedule_wait_for_output(uint32_t regs[14], char c);
+
+void __attribute__((noreturn))
+schedule_wait_for_input(uint32_t regs[14]);
+
+void __attribute__((noreturn))
+schedule_save_context(uint32_t regs[14]);
+
+void __attribute__((noreturn)) schedule(void);
+
+void __attribute__((noreturn))
+schedule_new(uint32_t pc, uint32_t sp);
+
+#endif