/*      $NetBSD: romread.S,v 1.2 2017/05/22 17:00:19 ragge Exp $ */
/*
* Copyright (c) 1995 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* This code is derived from software contributed to Ludd by
* Bertram Barth.
*
* 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.
*/

/* All bugs are subject to removal without further notice */



#include "../include/asm.h"

/*
* read750 (int block, int *regs)
*/
ENTRY(read750, 0xFFE)
       movl    8(%ap), %r8
       movl    4(%r8), %r1
       movl    8(%r8), %r2
       movl    12(%r8), %r3
       movl    24(%r8), %r6
       clrl    %r5
       movl    4(%ap), %r8
       pushl   $0
       movl    $0, 4(%sp)
       movl    %fp, 0xf0000    # ragge ???
       jsb     (%r6)
       movl    0xf0000, %fp
       ret

/*
* romread_uvax (int lbn, int size, void *buf, struct rpb *rpb)
*/
ENTRY(romread_uvax, 0xFFE)
       movl    16(%ap),%r11    # restore boot-contents of %r11 (rpb)
       movl    52(%r11), %r7     # load iovec/bqo into %r7
       addl3   (%r7), %r7, %r6 # load qio into %r6
       pushl   %r11            # base of rpb
       pushl   $0              # virtual-flag
       pushl   $33             # read-logical-block
       pushl   4(%ap)          # lbn to start reading
       pushl   8(%ap)          # number of bytes to read
       pushl   12(%ap)         # buffer-address
       calls   $6, (%r6)       # call the qio-routine
       ret                     # %r0 holds the result

/*
* romwrite_uvax (int lbn, int size, void *buf, struct rpb *rpb)
*/
ENTRY(romwrite_uvax, 0xFFE)
       movl    16(%ap), %r11   # restore boot-contents of %r11 (rpb)
       movl    52(%r11), %r7     # load iovec/bqo into %r7
       addl3   (%r7), %r7, %r6    # load qio into %r6
       pushl   %r11             # base of rpb
       pushl   $0              # virtual-flag
       pushl   $32             # write-logical-block
       pushl   4(%ap)           # lbn to start reading
       pushl   8(%ap)           # number of bytes to read
       pushl   12(%ap)          # buffer-address
       calls   $6, (%r6)        # call the qio-routine
       ret                     # %r0 holds the result