Merge branch 'bob' of https://repo.or.cz/RPi-MMU-example into alice

# Conflicts:
#	.gitignore
#	PL0_test.ld
#	demo_functionality.c
#	interrupt_vector.S
#	interrupts.c
#	kernel.c
#	memory.h

1 files changed, 19 insertions, 0 deletions

diff --git a/PL0_utils.c b/PL0_utils.c
new file mode 100644
index 0000000..d83edb9
--- /dev/null
+++ b/PL0_utils.c
@@ -0,0 +1,19 @@
+#include <stddef.h>
+#include <stdint.h>
+
+#include "svc_interface.h"
+#include "PL0_utils.h"
+
+// most generic definition possible
+// the actual function defined in svc.S
+uint32_t svc(enum svc_type, ...);
+
+void putchar(char character)
+{
+  svc(UART_PUTCHAR, character);
+}
+
+char getchar(void)
+{
+  return svc(UART_GETCHAR);
+}