/*      $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