114 lines
3.3 KiB
ArmAsm
114 lines
3.3 KiB
ArmAsm
/* $NetBSD: iomd_fiq.S,v 1.5 1998/04/01 22:53:32 mark Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1994-1996 Mark Brinicombe.
|
|
* Copyright (c) 1994 Brini.
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Mark Brinicombe.
|
|
* 4. The name of the company nor the name of the author may be used to
|
|
* endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* 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 HTE AUTHOR OR CONTRIBUTORS 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.
|
|
*
|
|
* RiscBSD kernel project
|
|
*
|
|
* fiq.S
|
|
*
|
|
* Low level fiq handlers
|
|
*
|
|
* Created : 27/09/94
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
#include <machine/cpu.h>
|
|
|
|
|
|
/*
|
|
* if NOFDFIQLOOPS is defined only 1 byte is transferred per
|
|
* FIQ. The new default behaviour is to keep looping
|
|
* until there are no FD FIQ's pending.
|
|
*/
|
|
|
|
/*
|
|
* These registers needs to be consistent with fd
|
|
* driver's assignment.
|
|
*
|
|
* r8 - scratch
|
|
* r9 - IOMD_FIQRQ
|
|
* r10 - transfer size
|
|
* r11 - data address
|
|
* r12 - floppy controller DACK address (+ 0x18000 for TC)
|
|
* r13 - scratch (loop counter)
|
|
*/
|
|
|
|
ENTRY_NP(floppy_read_fiq)
|
|
subs r10, r10, #0x00000001
|
|
addeq r12, r12, #0x00018000
|
|
ldrb r8, [r12]
|
|
strb r8, [r11], #0x0001
|
|
#ifndef NOFDFIQLOOPS
|
|
subeqs pc, lr, #0x00000004
|
|
ldrb r8, [r9]
|
|
tst r8, #0x01
|
|
addne r13, r13, #0x00000001
|
|
bne _floppy_read_fiq
|
|
#endif
|
|
subs pc, lr, #0x00000004
|
|
|
|
.global _floppy_read_fiq_end
|
|
_floppy_read_fiq_end:
|
|
|
|
|
|
/*
|
|
* These registers needs to be consistent with fd
|
|
* driver's assignment.
|
|
*
|
|
* r8 - scratch
|
|
* r9 - IOMD_FIQRQ
|
|
* r10 - transfer size
|
|
* r11 - data address
|
|
* r12 - floppy controller DACK address (+ 0x18000 for TC)
|
|
* r13 - scratch (loop counter)
|
|
*/
|
|
|
|
ENTRY_NP(floppy_write_fiq)
|
|
subs r10, r10, #0x00000001
|
|
addeq r12, r12, #0x00018000
|
|
ldrb r8, [r11], #0x0001
|
|
strb r8, [r12]
|
|
#ifndef NOFDFIQLOOPS
|
|
subeqs pc, lr, #0x00000004
|
|
ldrb r8, [r9]
|
|
tst r8, #0x01
|
|
addne r13, r13, #0x00000001
|
|
bne _floppy_write_fiq
|
|
#endif
|
|
subs pc, lr, #0x00000004
|
|
|
|
.global _floppy_write_fiq_end
|
|
_floppy_write_fiq_end:
|
|
|
|
/* End of fiq.S */
|