- Cleanedup toolchain

Committed on the Free edition of March Hare Software CVSNT Server.
Upgrade to CVS Suite for more features and support:
http://march-hare.com/cvsnt/


git-svn-id: http://moon:8086/svn/vhdl/trunk@381 cc03376c-175c-47c8-b038-4cd826a8556b

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

@@ -1,15 +1,50 @@
 		.file	"startup.S"
 	
-		.section .etext,"ax"
+		.section .rodata
+		.data
+argv0:		.asciz		"\"This-MIPS-program\""
+argv:		.word		argv0	
+
+		.text
+		.section .start, "ax"
 		.extern _init
 		.align	2
 		.globl _start
 _start:
 		.set	noreorder
 
-		# jump init
-		la $8, _init
-		jr $8
+		# Set stack pointer 
+		la $sp, stack_ptr
+		# Set global pointer 
+		la $gp, _gp
+
+		# zero bss
+		la $8, __bss_start
+		la $9, _end
+$zeroise:		
+		sw $0, 0($8)
+		bne $8, $9, $zeroise
+		addiu	$8, 4
+
+		# Call _init
+		la $k0, _init
+		jalr $k0
 		nop
 		
+		# Set environment
+		li	$a0, 1
+		la	$a1, argv
+
+		# Call main
+		la $k0, main
+		jalr $k0
+		nop
+
+		# Terminate after main returns
+_terminate:	
+		nop
+		la $t0, exit
+		jalr $t0
+		move $a0, $v0
+		
 		.set	reorder