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/* $NetBSD: ixp425_a4x_io.S,v 1.2 2005/12/11 12:16:51 christos Exp $ */
/*
* Copyright 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Steve C. Woodford for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* There are simple bus space functions for IO registers mapped at
* 32-bit aligned positions. offset is multiplied by 4.
*
* Based loosely on pxa2x0_a2x_io.S
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/arm/xscale/ixp425/ixp425_a4x_io.S 164426 2006-11-19 23:55:23Z sam $");
/*
* bus_space I/O functions with offset*4
*/
/*
* Read single
*/
ENTRY(a4x_bs_r_1)
ldr r0, [r1, r2, LSL #2]
and r0, r0, #0xff
mov pc, lr
ENTRY(a4x_bs_r_2)
ldr r0, [r1, r2, LSL #2]
mov r1, #0xff
orr r1, r1, r1, lsl #8
and r0, r0, r1
mov pc, lr
ENTRY(a4x_bs_r_4)
ldr r0, [r1, r2, LSL #2]
mov pc, lr
/*
* Write single
*/
ENTRY(a4x_bs_w_1)
and r3, r3, #0xff
str r3, [r1, r2, LSL #2]
mov pc, lr
ENTRY(a4x_bs_w_2)
mov r0, #0xff
orr r0, r0, r0, lsl #8
and r3, r3, r0
str r3, [r1, r2, LSL #2]
mov pc, lr
ENTRY(a4x_bs_w_4)
str r3, [r1, r2, LSL #2]
mov pc, lr
/*
* Read multiple
*/
ENTRY(a4x_bs_rm_1)
add r0, r1, r2, lsl #2
ldr r2, [sp, #0]
mov r1, r3
teq r2, #0
moveq pc, lr
1: ldr r3, [r0]
subs r2, r2, #1
strb r3, [r1], #1
bne 1b
mov pc, lr
ENTRY(a4x_bs_rm_2)
add r0, r1, r2, lsl #2
ldr r2, [sp, #0]
mov r1, r3
teq r2, #0
moveq pc, lr
1: ldr r3, [r0]
subs r2, r2, #1
strh r3, [r1], #2
bne 1b
mov pc, lr
/*
* Write multiple
*/
ENTRY(a4x_bs_wm_1)
add r0, r1, r2, lsl #2
ldr r2, [sp, #0]
mov r1, r3
teq r2, #0
moveq pc, lr
1: ldrb r3, [r1], #1
subs r2, r2, #1
str r3, [r0]
bne 1b
mov pc, lr
ENTRY(a4x_bs_wm_2)
add r0, r1, r2, lsl #2
ldr r2, [sp, #0]
mov r1, r3
teq r2, #0
moveq pc, lr
1: ldrh r3, [r1], #2
subs r2, r2, #1
str r3, [r0]
bne 1b
mov pc, lr