commit - 986015452b0226be1a802ce0d713871752e3de04
commit + 8b3b29b72611d5dc8b7eaf9afa06539c1f244950
blob - 210d8e6b2ecb429b7112ce6106163429f7816805
blob + 99e101c743e11449079a4ce05b4f19a5025f8839
--- Makefile
+++ Makefile
@@ -11,7 +11,7 @@ ASFILES		= boot.o
 CXX			= ${BIN}clang++
 CXXFLAGS	= -target ${TARGET} -Wall -Wextra -nostdlib -fno-exceptions
 CXXFLAGS    += -ffreestanding -mgeneral-regs-only
-CXXFLAGS    += -Iinclude -DBOARD_${BOARD}
+CXXFLAGS    += -Iinclude
 CXXFILES	= kernel.cc uart_${BOARD}.cc
 
 OBJS        = ${ASFILES:.S=.o} ${CXXFILES:.cc=.o}
blob - /dev/null
blob + 68fc2f5a6027ee720e39076492517add5595bdc7 (mode 644)
--- /dev/null
+++ include/uart.h
@@ -0,0 +1,24 @@
+// uart.h
+
+#pragma once
+
+#include <stdint.h>
+
+
+namespace Board
+{
+namespace Uart
+{
+
+void
+initialize();
+
+void
+send(uint8_t value);
+
+uint8_t
+recv();
+
+
+}   // namespace Uart
+}   // namespace Board
blob - d7a104bbfdcf25e3c85f03e5e252d47860b12dd2
blob + e36dbd2dd0cb445249dc0ce911795ab47e383191
--- kernel.cc
+++ kernel.cc
@@ -1,23 +1,21 @@
 // kernel.cc
 
-#ifdef BOARD_qemu_virt
-#include "uart_qemu_virt.h"
-#endif // BOARD_
+#include <uart.h>
 
 
 namespace 
 {
 
-/*
+
 void
-uart_send_string(Board::Uart &uart, const char *szContent)
+uart_send_string(const char *szContent)
 {
     const char *szCurrent = szContent;
     while (*szCurrent)
-        uart.send(*szCurrent);
+        Board::Uart::send(*szCurrent);
 }
-*/
 
+
 }
 
 
@@ -25,9 +23,11 @@ extern "C"
 void
 kernel_entry_point()
 {
-    Board::Uart uart;
-    // uart_send_string(uart, "Test ECHO mode\r\n");
+    Board::Uart::initialize();
 
+
+    uart_send_string("Test ECHO mode\r\n");
+
     for (; ; )
-        ; // uart.send(uart.recv());
+        Board::Uart::send(Board::Uart::recv());
 }
blob - 635fccb4acd8223f03c3600f2f9a0252178222c2
blob + 2c204bd74ac532abd15db2c11e2ca91fc87dd4d2
--- linker.ld
+++ linker.ld
@@ -2,7 +2,7 @@ SECTIONS
 {
     .text.boot : { *(.text.boot) }
     .text      : { *(.text) }
-    .rodata    : { *(.rodata) }
+    .rodata    : { *(.rodata*) }
     .data      : { *(.data) }
     .          = ALIGN(32);
     bss_begin  = .;
blob - cd825d51e1f10e3a4fd945438eb19be7fadb115d
blob + 820aadda2dab2213e682641d7a460988c84a4047
--- uart_qemu_virt.cc
+++ uart_qemu_virt.cc
@@ -2,11 +2,13 @@
 
 
 #include <hw.h>
-#include "uart_qemu_virt.h"
+#include <uart.h>
 
 
 namespace Board
 {
+namespace Uart
+{
 
 
 namespace
@@ -17,21 +19,21 @@ namespace
 }
 
 
-Uart::Uart()
+void initialize()
 {
 }
 
 
-// void
-// Uart::send(uint8_t value)
-// {
-// }
+void send(uint8_t /*value*/)
+{
+}
 
 
-// uint8_t
-// Uart::recv()
-// {
-// }
+uint8_t recv()
+{
+    return 0;
+}
 
 
+}   // namespace Uart
 }   // namespace Board
blob - 3cc750465caea9040243a244ec1f82092b16806e (mode 644)
blob + /dev/null
--- uart_qemu_virt.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// uart_qemu_virt.h
-
-#pragma once
-
-#include <stdint.h>
-
-
-namespace Board
-{
-
-
-class Uart
-{
-public:
-    Uart();
-
-    void send(uint8_t value);
-    uint8_t recv();
-};
-
-
-}   // namespace Board