1164426Ssam/* $NetBSD: ixp425_a4x_io.S,v 1.2 2005/12/11 12:16:51 christos Exp $ */ 2164426Ssam 3164426Ssam/* 4164426Ssam * Copyright 2003 Wasabi Systems, Inc. 5164426Ssam * All rights reserved. 6164426Ssam * 7164426Ssam * Written by Steve C. Woodford for Wasabi Systems, Inc. 8164426Ssam * 9164426Ssam * Redistribution and use in source and binary forms, with or without 10164426Ssam * modification, are permitted provided that the following conditions 11164426Ssam * are met: 12164426Ssam * 1. Redistributions of source code must retain the above copyright 13164426Ssam * notice, this list of conditions and the following disclaimer. 14164426Ssam * 2. Redistributions in binary form must reproduce the above copyright 15164426Ssam * notice, this list of conditions and the following disclaimer in the 16164426Ssam * documentation and/or other materials provided with the distribution. 17164426Ssam * 3. All advertising materials mentioning features or use of this software 18164426Ssam * must display the following acknowledgement: 19164426Ssam * This product includes software developed for the NetBSD Project by 20164426Ssam * Wasabi Systems, Inc. 21164426Ssam * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22164426Ssam * or promote products derived from this software without specific prior 23164426Ssam * written permission. 24164426Ssam * 25164426Ssam * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26164426Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27164426Ssam * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28164426Ssam * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29164426Ssam * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30164426Ssam * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31164426Ssam * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32164426Ssam * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33164426Ssam * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34164426Ssam * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35164426Ssam * POSSIBILITY OF SUCH DAMAGE. 36164426Ssam */ 37164426Ssam 38164426Ssam/* 39164426Ssam * There are simple bus space functions for IO registers mapped at 40164426Ssam * 32-bit aligned positions. offset is multiplied by 4. 41164426Ssam * 42164426Ssam * Based loosely on pxa2x0_a2x_io.S 43164426Ssam */ 44164426Ssam 45164426Ssam#include <machine/asm.h> 46164426Ssam__FBSDID("$FreeBSD$"); 47164426Ssam 48164426Ssam/* 49164426Ssam * bus_space I/O functions with offset*4 50164426Ssam */ 51164426Ssam 52164426Ssam/* 53164426Ssam * Read single 54164426Ssam */ 55164426SsamENTRY(a4x_bs_r_1) 56164426Ssam ldr r0, [r1, r2, LSL #2] 57164426Ssam and r0, r0, #0xff 58164426Ssam mov pc, lr 59275519SandrewEND(a4x_bs_r_1) 60164426Ssam 61164426SsamENTRY(a4x_bs_r_2) 62164426Ssam ldr r0, [r1, r2, LSL #2] 63164426Ssam mov r1, #0xff 64164426Ssam orr r1, r1, r1, lsl #8 65164426Ssam and r0, r0, r1 66164426Ssam mov pc, lr 67275519SandrewEND(a4x_bs_r_2) 68164426Ssam 69164426SsamENTRY(a4x_bs_r_4) 70164426Ssam ldr r0, [r1, r2, LSL #2] 71164426Ssam mov pc, lr 72275519SandrewEND(a4x_bs_r_4) 73164426Ssam 74164426Ssam/* 75164426Ssam * Write single 76164426Ssam */ 77164426SsamENTRY(a4x_bs_w_1) 78164426Ssam and r3, r3, #0xff 79164426Ssam str r3, [r1, r2, LSL #2] 80164426Ssam mov pc, lr 81275519SandrewEND(a4x_bs_w_1) 82164426Ssam 83164426SsamENTRY(a4x_bs_w_2) 84164426Ssam mov r0, #0xff 85164426Ssam orr r0, r0, r0, lsl #8 86164426Ssam and r3, r3, r0 87164426Ssam str r3, [r1, r2, LSL #2] 88164426Ssam mov pc, lr 89275519SandrewEND(a4x_bs_w_2) 90164426Ssam 91164426SsamENTRY(a4x_bs_w_4) 92164426Ssam str r3, [r1, r2, LSL #2] 93164426Ssam mov pc, lr 94275519SandrewEND(a4x_bs_w_4) 95164426Ssam 96164426Ssam/* 97164426Ssam * Read multiple 98164426Ssam */ 99164426SsamENTRY(a4x_bs_rm_1) 100164426Ssam add r0, r1, r2, lsl #2 101164426Ssam ldr r2, [sp, #0] 102164426Ssam mov r1, r3 103164426Ssam teq r2, #0 104164426Ssam moveq pc, lr 105164426Ssam1: ldr r3, [r0] 106164426Ssam subs r2, r2, #1 107164426Ssam strb r3, [r1], #1 108164426Ssam bne 1b 109164426Ssam mov pc, lr 110275519SandrewEND(a4x_bs_rm_1) 111164426Ssam 112164426SsamENTRY(a4x_bs_rm_2) 113164426Ssam add r0, r1, r2, lsl #2 114164426Ssam ldr r2, [sp, #0] 115164426Ssam mov r1, r3 116164426Ssam teq r2, #0 117164426Ssam moveq pc, lr 118164426Ssam1: ldr r3, [r0] 119164426Ssam subs r2, r2, #1 120164426Ssam strh r3, [r1], #2 121164426Ssam bne 1b 122164426Ssam mov pc, lr 123275519SandrewEND(a4x_bs_rm_2) 124164426Ssam 125164426Ssam/* 126164426Ssam * Write multiple 127164426Ssam */ 128164426SsamENTRY(a4x_bs_wm_1) 129164426Ssam add r0, r1, r2, lsl #2 130164426Ssam ldr r2, [sp, #0] 131164426Ssam mov r1, r3 132164426Ssam teq r2, #0 133164426Ssam moveq pc, lr 134164426Ssam1: ldrb r3, [r1], #1 135164426Ssam subs r2, r2, #1 136164426Ssam str r3, [r0] 137164426Ssam bne 1b 138164426Ssam mov pc, lr 139275519SandrewEND(a4x_bs_wm_1) 140164426Ssam 141164426SsamENTRY(a4x_bs_wm_2) 142164426Ssam add r0, r1, r2, lsl #2 143164426Ssam ldr r2, [sp, #0] 144164426Ssam mov r1, r3 145164426Ssam teq r2, #0 146164426Ssam moveq pc, lr 147164426Ssam1: ldrh r3, [r1], #2 148164426Ssam subs r2, r2, #1 149164426Ssam str r3, [r0] 150164426Ssam bne 1b 151164426Ssam mov pc, lr 152275519SandrewEND(a4x_bs_wm_2) 153