1 files changed, 54 insertions, 0 deletions
diff --git a/src/arm64/arm64-uart.c b/src/arm64/arm64-uart.c
new file mode 100644
index 0000000..fff3bbf
--- /dev/null
+++ b/src/arm64/arm64-uart.c
@@ -0,0 +1,54 @@
+/* -------------------------------------------
+
+    Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#include <lib/boot.h>
+#include <lib/string.h>
+
+/// BUGS: 0
+
+#define ARM64_MMIO_REG(addr) (*(volatile uint32_t*)(mp_uart_ptr + addr))
+
+/* this file handles the UART */
+
+static uint32_t* mp_uart_ptr = (uint32_t*)SYS_UART_BASE;
+
+// we need that one, to avoid sending mutliple chars to UART.
+static boolean mp_locked_put_char = no;
+
+utf_char_t mp_get_char(void)
+{
+	while ((ARM64_MMIO_REG(0x018) & (1 << 4)))
+	{
+	}
+
+	return (utf_char_t)*mp_uart_ptr;
+}
+
+void mp_put_char(utf_char_t ch)
+{
+	while ((ARM64_MMIO_REG(0x018) & (1 << 5)))
+	{
+	}
+
+	*mp_uart_ptr = ch;
+}
+
+/// @brief UART put string
+/// @param text the input text.
+size_t mp_put_string(const char* text)
+{
+	if (text == nil)
+		return 0;
+
+	size_t i = 0;
+
+	for (; i < strlen(text); i++)
+	{
+		mp_put_char(text[i]);
+	}
+
+	return i;
+}