; ***********************************************************************
; *									*
; *       C Start-up Routines for the DSLMU Microcontroller Board       *
; *									*
; ***********************************************************************

; Author:   John Zaitseff <J.Zaitseff@unsw.edu.au>
; Date:     26th March, 2003
; Version:  1.3

; This file contains the necessary "glue logic" to allow simple C programs
; to be run on the DSLMU Microcontroller Board.  Such C programs must NOT
; use the C Library or the C Math Library, as these start-up routines do
; not support that.


; -----------------------------------------------------------------------
; Assembly-language preamble for the main module

	.text

	.global	_start		; "_start" is the initial entry point
	.extern	main		; "main" is main() in the C program
	.global	__stack_top	; Defines the top of stack

_start:
	ldr	sp,=__stack_top	; Initialise the stack pointer SP
	bl	main		; Start running the main program

exit:	b	exit		; The DSLMU Microcontroller Board does
				; not have an operating system, so just
				; loop forever.


; -----------------------------------------------------------------------
; Uninitialised stack space

	.bss

; Technically, the stack should appear in its own stack segment called
; ".stack".  Doing this way (using the ".bss" segment), however, is
; easier.  See /usr/local/arm-elf/ldscripts/armelf.x for more information.

	.skip	8192		; Allow 8KB for the stack
__stack_top:
	.skip	4


; -----------------------------------------------------------------------

	.end