1/* $NetBSD: mainbus_io_asm.S,v 1.1 2001/02/24 19:38:02 reinoud Exp $ */ 2 3/* 4 * Copyright (c) 1997 Mark Brinicombe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe. 18 * 4. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <machine/asm.h> 36 37/* 38 * bus_space I/O functions for mainbus 39 */ 40 41 42/* 43 * read single 44 */ 45 46ENTRY(mainbus_bs_r_1) 47 ldrb r0, [r1, r2, lsl #2] 48 mov pc, lr 49 50ENTRY(mainbus_bs_r_2) 51 ldr r0, [r1, r2, lsl #2] 52 bic r0, r0, #0xff000000 53 bic r0, r0, #0x00ff0000 54 mov pc, lr 55 56ENTRY(mainbus_bs_r_4) 57 ldr r0, [r1, r2, lsl #2] 58 mov pc, lr 59 60/* 61 * write single 62 */ 63 64ENTRY(mainbus_bs_w_1) 65 strb r3, [r1, r2, lsl #2] 66 mov pc, lr 67 68ENTRY(mainbus_bs_w_2) 69 mov r3, r3, lsl #16 70 orr r3, r3, r3, lsr #16 71 str r3, [r1, r2, lsl #2] 72 mov pc, lr 73 74ENTRY(mainbus_bs_w_4) 75 str r3, [r1, r2, lsl #2] 76 mov pc, lr 77 78/* 79 * read multiple 80 */ 81 82ENTRY(mainbus_bs_rm_2) 83 add r0, r1, r2, lsl #2 84 mov r1, r3 85 ldr r2, [sp, #0] 86 b _C_LABEL(insw16) 87 88/* 89 * write multiple 90 */ 91 92ENTRY(mainbus_bs_wm_1) 93 add r0, r1, r2, lsl #2 94 ldr r2, [sp, #0] 95 96 /* Make sure that we have a positive length */ 97 cmp r2, #0x00000000 98 movle pc, lr 99 100mainbus_wm_1_loop: 101 ldrb r1, [r3], #0x0001 102 str r1, [r0] 103 subs r2, r2, #0x00000001 104 bgt mainbus_wm_1_loop 105 106 mov pc, lr 107 108ENTRY(mainbus_bs_wm_2) 109 add r0, r1, r2, lsl #2 110 mov r1, r3 111 ldr r2, [sp, #0] 112 b _C_LABEL(outsw16) 113