feat: initial

kernel/include/init/print.h

@@ -0,0 +1,38 @@
+#pragma once
+#include <stdint.h>
+
+enum class Color : uint8_t {
+    Black        =  0,
+    Blue         =  1,
+    Green        =  2,
+    Cyan         =  3,
+    Red          =  4,
+    Magenta      =  5,
+    Brown        =  6,
+    LightGray    =  7,
+    DarkGray     =  8,
+    LightBlue    =  9,
+    LightGreen   = 10,
+    LightCyan    = 11,
+    LightRed     = 12,
+    LightMagenta = 13,
+    Yellow       = 14,
+    White        = 15,
+};
+
+struct TextAttr {
+    Color fg;
+    Color bg;
+
+    constexpr TextAttr(Color fg = Color::White, Color bg = Color::Black) : fg(fg), bg(bg) {}
+
+    // Returns the attribute in the high byte, ready to OR with a character value.
+    constexpr uint16_t word() const {
+        return (uint16_t)(((uint8_t)bg << 4) | (uint8_t)fg) << 8;
+    }
+};
+
+void clear();
+void print(const char* str, TextAttr attr = {});
+void print_dec(uint64_t value, TextAttr attr = {});
+void print_hex(uint64_t value, TextAttr attr = {});