Initial commit of source code.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/simulator/main.c

@@ -0,0 +1,102 @@
+// Main starting point for host simulator.
+//
+// Copyright (C) 2016  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "sched.h" // sched_main
+
+uint8_t Interrupt_off;
+
+
+/****************************************************************
+ * Timers
+ ****************************************************************/
+
+uint32_t
+timer_from_ms(uint32_t ms)
+{
+    return 0; // XXX
+}
+
+void
+timer_periodic(void)
+{
+}
+
+uint32_t
+timer_read_time(void)
+{
+    return 0; // XXX
+}
+
+uint8_t
+timer_set_next(uint32_t next)
+{
+    return 0;
+}
+
+uint8_t
+timer_try_set_next(uint32_t next)
+{
+    return 1;
+}
+
+
+/****************************************************************
+ * Turn stdin/stdout into serial console
+ ****************************************************************/
+
+// XXX
+char *
+console_get_input(uint8_t *plen)
+{
+    *plen = 0;
+    return NULL;
+}
+
+void
+console_pop_input(uint8_t len)
+{
+}
+
+// Return an output buffer that the caller may fill with transmit messages
+char *
+console_get_output(uint8_t len)
+{
+    return NULL;
+}
+
+// Accept the given number of bytes added to the transmit buffer
+void
+console_push_output(uint8_t len)
+{
+}
+
+
+/****************************************************************
+ * Startup
+ ****************************************************************/
+
+// Periodically sleep so we don't consume all CPU
+static void
+simu_pause(void)
+{
+    // XXX - should check that no timers are present.
+    usleep(1);
+}
+DECL_TASK(simu_pause);
+
+// Main entry point for simulator.
+int
+main(void)
+{
+    // Make stdin non-blocking
+    fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL, 0) | O_NONBLOCK);
+
+    sched_main();
+    return 0;
+}