From 28fd88e0dd66728b22cd792deb5a1e8636f36ed3 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sat, 13 Dec 2025 23:21:03 +0800
Subject: feat: add preemptive scheduling, SBI timer support and FDT parser.

---
 src/drivers/uart.cc | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src/drivers')

diff --git a/src/drivers/uart.cc b/src/drivers/uart.cc
index a81ba3f..367f442 100644
--- a/src/drivers/uart.cc
+++ b/src/drivers/uart.cc
@@ -1,7 +1,8 @@
 #include "drivers/uart.h"
 #include "common/types.h"
+#include "kernel/config.h"
 
-#define UART0_BASE          0x10000000L
+// #define UART0_BASE          0x10000000L
 
 #define UART_RBR            0x00 // Receiver Buffer Register (Read)
 #define UART_THR            0x00 // Transmitter Holding Register (Write)
@@ -16,11 +17,15 @@
 namespace Drivers{
     inline volatile uint8_t &reg(uint32_t offset)
     {
-        return *reinterpret_cast<volatile uint8_t *>(UART0_BASE + offset);
+        return *reinterpret_cast<volatile uint8_t *>(g_uart_base + offset);
     }
 
     void uart_init()
     {
+        
+        if (g_uart_base == 0)
+            return;
+
         reg(UART_IER) = 0x00;
 
         reg(UART_LCR) = 0x80;
-- 
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