Cleanup and get the program to a basic Hello, World program.

Add separate source file for initializing the uart for stdout.

1 files changed, 12 insertions, 5 deletions

diff --git a/src/init.c b/src/init.c
index 1d9474a..c402f17 100644
--- a/src/init.c
+++ b/src/init.c
@@ -1,6 +1,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include "io.h"
 #include "isr_vector.h"
 
 void on_reset(void);
@@ -11,9 +12,11 @@ default_irq_handler(void)
   return;
 }
 
-#define WEAK_IRQ(irq)                                                  \
-  void __attribute__((                                                 \
-      weak, alias("default_irq_handler"), __section__(".isr_vector.routines"))) \
+#define WEAK_IRQ(irq)                       \
+  void __attribute__((                      \
+      weak,                                 \
+      alias("default_irq_handler"),         \
+      __section__(".isr_vector.routines"))) \
   irq(void)
 
 WEAK_IRQ(irq_on_reset);
@@ -60,8 +63,8 @@ extern uint32_t BSS_STOP;
 
 static inline void set_mtvec(void* vector_table)
 {
-  uint32_t mtvec = (uint32_t) vector_table;
-  mtvec |= 1; // Set interrupt table mode to "VECTORED"
+  uint32_t mtvec = (uint32_t)vector_table;
+  mtvec |= 1;  // Set interrupt table mode to "VECTORED"
   asm volatile("csrw mtvec, %0" : : "r"(mtvec));
 }
 
@@ -107,6 +110,10 @@ static __attribute((__section__(".sinit.1"))) void start(void)
   init_data_segments();
   /* Set the mtvec to the isr_vector. */
   set_mtvec(&isr_vector);
+
+  /* Initialize stdout. */
+  init_uart1_for_stdout();
+
   /* Jump to main */
   main();
 }