[Bootloader]

- use full featured exception handler
- cleaned up Linker script
- added exception and interrupt processing


git-svn-id: http://moon:8086/svn/mips@26 a8ebac50-d88d-4704-bea3-6648445a41b3

src/bootloader/test.c

@@ -3,6 +3,7 @@ void main()
 {
 	uint32_t i;
 	
+	volatile uint32_t *pUART0_stat = (uint32_t*)SYS_UART_STAT;
 	volatile uint32_t *pGPIO = (uint32_t*)SYS_GPIO_0_DATA;
 	volatile uint32_t *pGPIODIR = (uint32_t*)SYS_GPIO_0_DIR;
 	volatile uint32_t *pRAM = (uint32_t*)SDRAM_BASE;
@@ -10,21 +11,23 @@ void main()
 	*pGPIODIR = GPIO_0_DFLT_DIR;
 	uint8_t led = 0;
 
+	// UART: enable RX interrupt
+	*pUART0_stat |= (1 << 6);
+	interrupt_enable(3);
+
 	sputs("Hello, world!\n");
 	while(1)
 	{
 		sputs("Iteration # ");print_word(led);sputs("\n");
+		sputs("Uart status : ");print_word(*pUART0_stat);sputs("\n");
+		sputs("CPU status  : ");print_word(CP0_SR_read());sputs("\n");
 
+		*pGPIO = led;
 		if(led == 0)
 		{
 			memdump((uint8_t*)pRAM, 0, 16, 256);
 		}
 
-		*pGPIO = led;
-		for (i=0; i < 1024*1024; i++)
-		{
-			pRAM[i] = i;
-		}
 		led = (led+1) % 64;
 	}
 	*pGPIO = 1;