1 /* $NetBSD: iomd_fiq.S,v 1.5 2013/08/18 16:09:50 matt Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1996 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL HTE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * RiscBSD kernel project 36 * 37 * fiq.S 38 * 39 * Low level fiq handlers 40 * 41 * Created : 27/09/94 42 */ 43 44 #include <arm/asm.h> 45 #include <arm/locore.h> 46 47 48 /* 49 * if NOFDFIQLOOPS is defined only 1 byte is transferred per 50 * FIQ. The new default behaviour is to keep looping 51 * until there are no FD FIQ's pending. 52 */ 53 54 /* 55 * These registers needs to be consistent with fd 56 * driver's assignment. 57 * 58 * r8 - scratch 59 * r9 - IOMD_FIQRQ 60 * r10 - transfer size 61 * r11 - data address 62 * r12 - floppy controller DACK address (+ 0x18000 for TC) 63 * r13 - scratch (loop counter) 64 */ 65 66 ENTRY_NP(floppy_read_fiq) 67 subs r10, r10, #0x00000001 68 addeq r12, r12, #0x00018000 69 ldrb r8, [r12] 70 strb r8, [r11], #0x0001 71 #ifndef NOFDFIQLOOPS 72 subseq pc, lr, #0x00000004 73 ldrb r8, [r9] 74 tst r8, #0x01 75 addne r13, r13, #0x00000001 76 bne _C_LABEL(floppy_read_fiq) 77 #endif 78 subs pc, lr, #0x00000004 79 END(floppy_read_fiq) 80 81 .global _C_LABEL(floppy_read_fiq_end) 82 _C_LABEL(floppy_read_fiq_end): 83 84 85 /* 86 * These registers needs to be consistent with fd 87 * driver's assignment. 88 * 89 * r8 - scratch 90 * r9 - IOMD_FIQRQ 91 * r10 - transfer size 92 * r11 - data address 93 * r12 - floppy controller DACK address (+ 0x18000 for TC) 94 * r13 - scratch (loop counter) 95 */ 96 97 ENTRY_NP(floppy_write_fiq) 98 subs r10, r10, #0x00000001 99 addeq r12, r12, #0x00018000 100 ldrb r8, [r11], #0x0001 101 strb r8, [r12] 102 #ifndef NOFDFIQLOOPS 103 subseq pc, lr, #0x00000004 104 ldrb r8, [r9] 105 tst r8, #0x01 106 addne r13, r13, #0x00000001 107 bne _C_LABEL(floppy_write_fiq) 108 #endif 109 subs pc, lr, #0x00000004 110 END(floppy_write_fiq) 111 112 .global _C_LABEL(floppy_write_fiq_end) 113 _C_LABEL(floppy_write_fiq_end): 114
Indexes created Sun Sep 28 16:09:52 GMT 2025