blocking serial messages

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mmio.zig b/src/mmio.zig
new file mode 100644
index 0000000..7233733
--- /dev/null
+++ b/src/mmio.zig
@@ -0,0 +1,9 @@
+pub fn write(reg: comptime_int, val: u32) void {
+    const mmio_ptr: *volatile u32 = @ptrFromInt(reg);
+    mmio_ptr.* = val;
+}
+
+pub fn read(reg: comptime_int) u32 {
+    const mmio_ptr: *volatile u32 = @ptrFromInt(reg);
+    return mmio_ptr.*;
+}