/*	$NetBSD: consio2.S,v 1.2 2017/05/22 16:59:32 ragge Exp $ */
/*
 * Copyright (c) 1994, 1998 Ludd, University of Lule}, Sweden.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <machine/asm.h>

/*
 * int rom_putchar (int c)	==> putchar() using ROM-routines
 */
ENTRY(rom_putchar, 0x0004)		# save-mask: R2
	movl	4(%ap), %r2		# move argument to R2
	jsb	*_C_LABEL(rom_putc)	# write it
	ret				# that is all


/*
 * int rom_getchar (void)	==> getchar() using ROM-routines
 */
ENTRY(rom_getchar, 0x0002)		# save-mask: R1
loop:					# do {
	jsb	*_C_LABEL(rom_getc)	#   call the getc-routine
	tstl	%r0			#   check if char ready
	beql	loop			# } while (R0 == 0)
	movl	%r1, %r0			# R1 holds char
	ret				# we are done

ENTRY(rom_testchar, 0)
	mnegl	$1,%r0
	jsb	*_C_LABEL(rom_getc)
	tstl	%r0
	beql	1f
	movl	%r1,%r0
1:	ret

ENTRY(_rtt, 0)
	halt


/*
 * int ka630_rom_getchar (void) ==> getchar() using ROM-routines on KA630
 */
ENTRY(ka630_rom_getchar, 0x0802)	# save-mask: R1, R11
	movl	_C_LABEL(ka630_conspage),%r11  # load location of console page
1:					# do {
	jsb	*0x1C(%r11)		#   call the getc-routine (KA630_GETC)
	blbc	%r0,1b			# } while (R0 == 0)
	movl	%r1,%r0			# R1 holds char
	ret				# we are done

ENTRY(ka630_rom_testchar, 0)
	movl	_C_LABEL(ka630_conspage),%r3
	jsb	*0x1C(%r3)
	blbc	%r0,1f
	movl	%r1,%r0
1:	ret

/*
 * int ka630_rom_putchar (int c) ==> putchar() using ROM-routines on KA630
 */
ENTRY(ka630_rom_putchar, 0x802)	# save-mask: R1, R11
	movl	_C_LABEL(ka630_conspage),%r11
				# load location of console page
1:				# do {
	jsb	*0x20(%r11)	#   is rom ready? (KA630_PUTC_POLL)
	blbc	%r0,1b		# } while (R0 == 0)
	movl	4(%ap),%r1	# R1 holds char
	jsb	*0x24(%r11)	# output character (KA630_PUTC)
	ret			# we are done

/*
 * int ka53_rom_getchar (void)	==> getchar() using ROM-routines on KA53
 */
ENTRY(ka53_rom_getchar, 0x0802)	# save-mask: R1, R11
	movl	_C_LABEL(ka53_conspage),%r11
				# load location of console page
1:				# do {
	jsb	*0x64(%r11)	#   test for char
	blbc	%r0,1b		# } while (R0 == 0)
	jsb	*0x6c(%r11)	# get the char
	ret			# we are done

ENTRY(ka53_rom_testchar, 0)
	movl	_C_LABEL(ka53_conspage),%r3
	jsb	*0x64(%r3)
	blbc	%r0,1f
	jsb	*0x6c(%r3)	# get the char
1:	ret

/*
 * int ka53_rom_putchar (int c) ==> putchar() using ROM-routines on KA53
 */
ENTRY(ka53_rom_putchar, 0x0802)	# save-mask: R1, R11
	movl	_C_LABEL(ka53_conspage),%r11
				# load location of console page
1:				# do {
	jsb	*0x20(%r11)	#   is rom ready?
	blbc	%r0,1b		# } whi	le (R0 == 0)
	movl	4(%ap),%r1	# R1 holds char
	jsb	*0x24(%r11)	# output character
	ret			# we are done