Initial version

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git-svn-id: http://moon:8086/svn/vhdl/trunk@272 cc03376c-175c-47c8-b038-4cd826a8556b

lib/CPUs/MIPS/bsp/examples/init.S

@@ -0,0 +1,44 @@
+		.file	"init.S"
+	
+		.text
+		.align	2
+		.globl _init
+		.extern end
+	
+_init:
+		.set	noreorder
+
+		# set uart
+		la	$8, sys_uart_baud
+		addiu	$9, $0, baudrate
+		sb	$9, 0($8)
+		
+		# set stack pointer 
+		la $sp, stack_ptr
+		
+		# zero bss
+		la $8, __bss_start
+		la $9, __bss_end
+$zeroise:		
+		sw $0, 0($8)
+		bne $8, $9, $zeroise
+		addiu	$8, 4
+		
+		# zero sbss
+#		la $8, __sbss_start
+#		la $9, __sbss_end
+#$szeroise:		
+#		sw $0, 0($8)
+#		bne $8, $9, $szeroise
+#		addiu	$8, 4
+
+		# jump main
+		la $8, main
+		jalr $8
+
+_terminate:
+		nop
+		j		_terminate
+		nop
+		
+		.set	reorder