- bootloader build with LTO

- switch between debugger from rom or from app
- gdb_stub: added debug output to stdout

git-svn-id: http://moon:8086/svn/mips@104 a8ebac50-d88d-4704-bea3-6648445a41b3

src/libsys/boards/denano/board.c

@@ -11,9 +11,19 @@
 #include "../../console.h"
 #include "../../regdef.h"
 
-const fp_xcpt_t dbg_func = (fp_xcpt_t)0xbfc01f00;
-
 extern uart_if_t uart_if[];
+extern void handle_exception (unsigned long *registers);
+
+int gdb_stub(struct xcptcontext * xcp)
+{
+	handle_exception((unsigned long *)xcp);
+	return 0;
+}
+#ifdef WITH_ROM_GDBSTUB
+const fp_xcpt_t dbg_func = (fp_xcpt_t)0xbfc01f00;
+#else
+const fp_xcpt_t dbg_func = (fp_xcpt_t)gdb_stub;
+#endif
 
 #define ARRAYSIZE(a)	(sizeof(a)/sizeof(a[0]))
 
@@ -48,9 +58,7 @@ void dbg_uart_isr(struct xcptcontext *xcp)
 void dbg_uart_setup()
 {
 	const int UART_INT = SYS_INT_UART1;
-	dbg_uart = (uart_if_t*)con_getInterfaceByName("UART-1")->pInst;
-	
-	*dbg_uart->pCTRL = SYS_UART_BIT_RX_INTEN;
+	*uart_if[UART_DEBUGGER].pCTRL = SYS_UART_BIT_RX_INTEN;
 	interrupt_register(UART_INT, dbg_uart_isr);
 	interrupt_enable(UART_INT);
 }
@@ -88,3 +96,26 @@ void board_init(void)
 
 	// Do some initializations here
 }
+
+void dbg_putchar(char c)
+{
+	if (c == 0x0A)
+	{
+		UART_writechar(&uart_if[UART_DEBUGGER], 0x0D);
+	}
+	UART_writechar(&uart_if[UART_DEBUGGER], c);
+}
+
+char dbg_getchar()
+{
+	int c;
+
+	// busy read
+	do
+	{
+		c = UART_readchar(&uart_if[UART_DEBUGGER]);
+		
+	} while(c < 0);
+	
+	return (char)c;
+}