iomd_fiq.S revision 1.1.4.2
1 1.1.4.2 nathanw /* $NetBSD: iomd_fiq.S,v 1.1.4.2 2002/01/08 00:23:15 nathanw Exp $ */ 2 1.1.4.2 nathanw 3 1.1.4.2 nathanw /* 4 1.1.4.2 nathanw * Copyright (c) 1994-1996 Mark Brinicombe. 5 1.1.4.2 nathanw * Copyright (c) 1994 Brini. 6 1.1.4.2 nathanw * All rights reserved. 7 1.1.4.2 nathanw * 8 1.1.4.2 nathanw * Redistribution and use in source and binary forms, with or without 9 1.1.4.2 nathanw * modification, are permitted provided that the following conditions 10 1.1.4.2 nathanw * are met: 11 1.1.4.2 nathanw * 1. Redistributions of source code must retain the above copyright 12 1.1.4.2 nathanw * notice, this list of conditions and the following disclaimer. 13 1.1.4.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 14 1.1.4.2 nathanw * notice, this list of conditions and the following disclaimer in the 15 1.1.4.2 nathanw * documentation and/or other materials provided with the distribution. 16 1.1.4.2 nathanw * 3. All advertising materials mentioning features or use of this software 17 1.1.4.2 nathanw * must display the following acknowledgement: 18 1.1.4.2 nathanw * This product includes software developed by Mark Brinicombe. 19 1.1.4.2 nathanw * 4. The name of the company nor the name of the author may be used to 20 1.1.4.2 nathanw * endorse or promote products derived from this software without specific 21 1.1.4.2 nathanw * prior written permission. 22 1.1.4.2 nathanw * 23 1.1.4.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 1.1.4.2 nathanw * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 1.1.4.2 nathanw * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 1.1.4.2 nathanw * IN NO EVENT SHALL HTE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 1.1.4.2 nathanw * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 1.1.4.2 nathanw * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 1.1.4.2 nathanw * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 1.1.4.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 1.1.4.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 1.1.4.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 1.1.4.2 nathanw * SUCH DAMAGE. 34 1.1.4.2 nathanw * 35 1.1.4.2 nathanw * RiscBSD kernel project 36 1.1.4.2 nathanw * 37 1.1.4.2 nathanw * fiq.S 38 1.1.4.2 nathanw * 39 1.1.4.2 nathanw * Low level fiq handlers 40 1.1.4.2 nathanw * 41 1.1.4.2 nathanw * Created : 27/09/94 42 1.1.4.2 nathanw */ 43 1.1.4.2 nathanw 44 1.1.4.2 nathanw #include <machine/asm.h> 45 1.1.4.2 nathanw #include <machine/cpu.h> 46 1.1.4.2 nathanw 47 1.1.4.2 nathanw 48 1.1.4.2 nathanw /* 49 1.1.4.2 nathanw * if NOFDFIQLOOPS is defined only 1 byte is transferred per 50 1.1.4.2 nathanw * FIQ. The new default behaviour is to keep looping 51 1.1.4.2 nathanw * until there are no FD FIQ's pending. 52 1.1.4.2 nathanw */ 53 1.1.4.2 nathanw 54 1.1.4.2 nathanw /* 55 1.1.4.2 nathanw * These registers needs to be consistent with fd 56 1.1.4.2 nathanw * driver's assignment. 57 1.1.4.2 nathanw * 58 1.1.4.2 nathanw * r8 - scratch 59 1.1.4.2 nathanw * r9 - IOMD_FIQRQ 60 1.1.4.2 nathanw * r10 - transfer size 61 1.1.4.2 nathanw * r11 - data address 62 1.1.4.2 nathanw * r12 - floppy controller DACK address (+ 0x18000 for TC) 63 1.1.4.2 nathanw * r13 - scratch (loop counter) 64 1.1.4.2 nathanw */ 65 1.1.4.2 nathanw 66 1.1.4.2 nathanw ENTRY_NP(floppy_read_fiq) 67 1.1.4.2 nathanw subs r10, r10, #0x00000001 68 1.1.4.2 nathanw addeq r12, r12, #0x00018000 69 1.1.4.2 nathanw ldrb r8, [r12] 70 1.1.4.2 nathanw strb r8, [r11], #0x0001 71 1.1.4.2 nathanw #ifndef NOFDFIQLOOPS 72 1.1.4.2 nathanw subeqs pc, lr, #0x00000004 73 1.1.4.2 nathanw ldrb r8, [r9] 74 1.1.4.2 nathanw tst r8, #0x01 75 1.1.4.2 nathanw addne r13, r13, #0x00000001 76 1.1.4.2 nathanw bne _C_LABEL(floppy_read_fiq) 77 1.1.4.2 nathanw #endif 78 1.1.4.2 nathanw subs pc, lr, #0x00000004 79 1.1.4.2 nathanw 80 1.1.4.2 nathanw .global _C_LABEL(floppy_read_fiq_end) 81 1.1.4.2 nathanw _C_LABEL(floppy_read_fiq_end): 82 1.1.4.2 nathanw 83 1.1.4.2 nathanw 84 1.1.4.2 nathanw /* 85 1.1.4.2 nathanw * These registers needs to be consistent with fd 86 1.1.4.2 nathanw * driver's assignment. 87 1.1.4.2 nathanw * 88 1.1.4.2 nathanw * r8 - scratch 89 1.1.4.2 nathanw * r9 - IOMD_FIQRQ 90 1.1.4.2 nathanw * r10 - transfer size 91 1.1.4.2 nathanw * r11 - data address 92 1.1.4.2 nathanw * r12 - floppy controller DACK address (+ 0x18000 for TC) 93 1.1.4.2 nathanw * r13 - scratch (loop counter) 94 1.1.4.2 nathanw */ 95 1.1.4.2 nathanw 96 1.1.4.2 nathanw ENTRY_NP(floppy_write_fiq) 97 1.1.4.2 nathanw subs r10, r10, #0x00000001 98 1.1.4.2 nathanw addeq r12, r12, #0x00018000 99 1.1.4.2 nathanw ldrb r8, [r11], #0x0001 100 1.1.4.2 nathanw strb r8, [r12] 101 1.1.4.2 nathanw #ifndef NOFDFIQLOOPS 102 1.1.4.2 nathanw subeqs pc, lr, #0x00000004 103 1.1.4.2 nathanw ldrb r8, [r9] 104 1.1.4.2 nathanw tst r8, #0x01 105 1.1.4.2 nathanw addne r13, r13, #0x00000001 106 1.1.4.2 nathanw bne _C_LABEL(floppy_write_fiq) 107 1.1.4.2 nathanw #endif 108 1.1.4.2 nathanw subs pc, lr, #0x00000004 109 1.1.4.2 nathanw 110 1.1.4.2 nathanw .global _C_LABEL(floppy_write_fiq_end) 111 1.1.4.2 nathanw _C_LABEL(floppy_write_fiq_end): 112
Indexes created Fri Oct 31 11:10:07 GMT 2025