142 lines
3.3 KiB
ArmAsm
142 lines
3.3 KiB
ArmAsm
/* $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>
|
|
|
|
/*
|
|
* 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
|