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      1 /*	$NetBSD: romread.S,v 1.2 2017/05/22 17:00:19 ragge Exp $ */
      2 /*
      3  * Copyright (c) 1995 Ludd, University of Lule}, Sweden.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to Ludd by
      7  * Bertram Barth.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30  /* All bugs are subject to removal without further notice */
     31 
     32 
     33 
     34 #include "../include/asm.h"
     35 
     36 /*
     37  * read750 (int block, int *regs)
     38  */
     39 ENTRY(read750, 0xFFE)
     40 	movl	8(%ap), %r8
     41 	movl	4(%r8), %r1
     42 	movl	8(%r8), %r2
     43 	movl	12(%r8), %r3
     44 	movl	24(%r8), %r6
     45 	clrl	%r5
     46 	movl	4(%ap), %r8
     47 	pushl	$0
     48 	movl	$0, 4(%sp)
     49 	movl    %fp, 0xf0000	# ragge ???
     50 	jsb	(%r6)
     51 	movl    0xf0000, %fp
     52 	ret
     53 
     54 /*
     55  * romread_uvax (int lbn, int size, void *buf, struct rpb *rpb)
     56  */
     57 ENTRY(romread_uvax, 0xFFE)
     58 	movl	16(%ap),%r11	# restore boot-contents of %r11 (rpb)
     59 	movl    52(%r11), %r7     # load iovec/bqo into %r7
     60 	addl3   (%r7), %r7, %r6	# load qio into %r6
     61 	pushl	%r11		# base of rpb
     62 	pushl	$0		# virtual-flag
     63 	pushl	$33		# read-logical-block
     64 	pushl	4(%ap)		# lbn to start reading
     65 	pushl	8(%ap)		# number of bytes to read
     66 	pushl	12(%ap)		# buffer-address
     67 	calls	$6, (%r6)	# call the qio-routine
     68 	ret			# %r0 holds the result
     69 
     70 /*
     71  * romwrite_uvax (int lbn, int size, void *buf, struct rpb *rpb)
     72  */
     73 ENTRY(romwrite_uvax, 0xFFE)
     74 	movl    16(%ap), %r11	# restore boot-contents of %r11 (rpb)
     75 	movl    52(%r11), %r7     # load iovec/bqo into %r7
     76 	addl3   (%r7), %r7, %r6    # load qio into %r6
     77 	pushl   %r11             # base of rpb
     78 	pushl   $0              # virtual-flag
     79 	pushl   $32             # write-logical-block
     80 	pushl   4(%ap)           # lbn to start reading
     81 	pushl   8(%ap)           # number of bytes to read
     82 	pushl   12(%ap)          # buffer-address
     83 	calls   $6, (%r6)        # call the qio-routine
     84 	ret                     # %r0 holds the result
     85 
     86