1/* $NetBSD: iomd_fiq.S,v 1.2 2001/12/20 01:20:23 thorpej 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 <machine/asm.h> 45#include <machine/cpu.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 66ENTRY_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 subeqs 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 80 .global _C_LABEL(floppy_read_fiq_end) 81_C_LABEL(floppy_read_fiq_end): 82 83 84/* 85 * These registers needs to be consistent with fd 86 * driver's assignment. 87 * 88 * r8 - scratch 89 * r9 - IOMD_FIQRQ 90 * r10 - transfer size 91 * r11 - data address 92 * r12 - floppy controller DACK address (+ 0x18000 for TC) 93 * r13 - scratch (loop counter) 94 */ 95 96ENTRY_NP(floppy_write_fiq) 97 subs r10, r10, #0x00000001 98 addeq r12, r12, #0x00018000 99 ldrb r8, [r11], #0x0001 100 strb r8, [r12] 101#ifndef NOFDFIQLOOPS 102 subeqs pc, lr, #0x00000004 103 ldrb r8, [r9] 104 tst r8, #0x01 105 addne r13, r13, #0x00000001 106 bne _C_LABEL(floppy_write_fiq) 107#endif 108 subs pc, lr, #0x00000004 109 110 .global _C_LABEL(floppy_write_fiq_end) 111_C_LABEL(floppy_write_fiq_end): 112