podulebus_io_asm.S revision 1.1
1 /* $NetBSD: podulebus_io_asm.S,v 1.1 2001/10/05 22:27:58 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 podulebus 39 */ 40 41 /* 42 * read single 43 */ 44 45 ENTRY(podulebus_bs_r_1) 46 mov r2, r2, lsl r0 47 ldrb r0, [r1, r2] 48 mov pc, lr 49 50 ENTRY(podulebus_bs_r_2) 51 mov r2, r2, lsl r0 52 ldr r0, [r1, r2] 53 bic r0, r0, #0xff000000 54 bic r0, r0, #0x00ff0000 55 mov pc, lr 56 57 ENTRY(podulebus_bs_r_4) 58 mov r2, r2, lsl r0 59 ldr r0, [r1, r2] 60 mov pc, lr 61 62 /* 63 * write single 64 */ 65 66 ENTRY(podulebus_bs_w_1) 67 mov r2, r2, lsl r0 68 strb r3, [r1, r2] 69 mov pc, lr 70 71 ENTRY(podulebus_bs_w_2) 72 mov r3, r3, lsl #16 73 orr r3, r3, r3, lsr #16 74 mov r2, r2, lsl r0 75 str r3, [r1, r2] 76 mov pc, lr 77 78 ENTRY(podulebus_bs_w_4) 79 mov r2, r2, lsl r0 80 str r3, [r1, r2] 81 mov pc, lr 82 83 /* 84 * read multiple 85 */ 86 87 ENTRY(podulebus_bs_rm_1) 88 add r0, r1, r2, lsl r0 89 ldr r2, [sp, #0] 90 91 /* Make sure that we have a positive length */ 92 cmp r2, #0x00000000 93 movle pc, lr 94 95 podulebus_rm_1_loop: 96 ldrb r1, [r0] 97 strb r1, [r3], #0x0001 98 subs r2, r2, #0x00000001 99 bgt podulebus_rm_1_loop 100 101 mov pc, lr 102 103 ENTRY(podulebus_bs_rm_2) 104 add r0, r1, r2, lsl r0 105 mov r1, r3 106 ldr r2, [sp, #0] 107 b _C_LABEL(insw) 108 109 /* 110 * write multiple 111 */ 112 113 ENTRY(podulebus_bs_wm_1) 114 add r0, r1, r2, lsl r0 115 ldr r2, [sp, #0] 116 117 /* Make sure that we have a positive length */ 118 cmp r2, #0x00000000 119 movle pc, lr 120 121 podulebus_wm_1_loop: 122 ldrb r1, [r3], #0x0001 123 strb r1, [r0] 124 subs r2, r2, #0x00000001 125 bgt podulebus_wm_1_loop 126 127 mov pc, lr 128 129 ENTRY(podulebus_bs_wm_2) 130 add r0, r1, r2, lsl r0 131 mov r1, r3 132 ldr r2, [sp, #0] 133 b _C_LABEL(outsw) 134
Indexes created Wed Oct 01 12:09:54 GMT 2025