clkint.S

;
; Copyright (c) 2007-21, Kalopa Robotics Limited.  All rights reserved.
;
; This is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2, or (at your option)
; any later version.  It is distributed in the hope that it will be
; useful, but WITHOUT ANY WARRANTY; without even the implied warranty
; of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this product; see the file COPYING.  If not, write to the
; Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;
; ABSTRACT
;
#include <avr/io.h>
;
; void _clk_int();
;
; Clock timer tick. Just call the main C routine.
	.section .init6,"ax",@progbits
	.global	_clk_int
	.func	_clk_int
_clk_int:
	push	r24					; Save the status register
	in		r24,_SFR_IO_ADDR(SREG)
	push	r24
	push	r25
;
	push	r18					; Save the temporary regs
	push	r19
	push	r20
	push	r21
	push	r26
	push	r27
	push	r30
	push	r31
#ifdef __AVR_HAVE_JMP_CALL__
	call	clocktick			; Call the main clock tick
#else
	rcall	clocktick			; Call the main clock tick
#endif
	pop		r31					; Restore the registers
	pop		r30
	pop		r27
	pop		r26
	pop		r21
	pop		r20
	pop		r19
	pop		r18
;
	pop		r25					; Restore the status register
	pop		r24
	out		_SFR_IO_ADDR(SREG),r24
	pop		r24
	reti						; Return from interrupt
	.endfunc
;
; Fin.