sunscpalreg.h revision 1.1.2.2
1 1.1.2.2 bouyer /* $NetBSD: sunscpalreg.h,v 1.1.2.2 2001/04/23 09:42:20 bouyer Exp $ */ 2 1.1.2.2 bouyer 3 1.1.2.2 bouyer /*- 4 1.1.2.2 bouyer * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.1.2.2 bouyer * All rights reserved. 6 1.1.2.2 bouyer * 7 1.1.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 bouyer * by Matthew Fredette. 9 1.1.2.2 bouyer * 10 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 12 1.1.2.2 bouyer * are met: 13 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 18 1.1.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 bouyer * must display the following acknowledgement: 20 1.1.2.2 bouyer * This product includes software developed by the NetBSD 21 1.1.2.2 bouyer * Foundation, Inc. and its contributors. 22 1.1.2.2 bouyer * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.2 bouyer * contributors may be used to endorse or promote products derived 24 1.1.2.2 bouyer * from this software without specific prior written permission. 25 1.1.2.2 bouyer * 26 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.2 bouyer */ 38 1.1.2.2 bouyer 39 1.1.2.2 bouyer /* 40 1.1.2.2 bouyer * Macros for accessing the registers in the Sun "Sun-2" "sc" 41 1.1.2.2 bouyer * PAL+logic sequencer chips. 42 1.1.2.2 bouyer */ 43 1.1.2.2 bouyer 44 1.1.2.2 bouyer /* 45 1.1.2.2 bouyer * Interface Control Register. 46 1.1.2.2 bouyer * 47 1.1.2.2 bouyer * This register pretty much just reflects the state of the SCSI 48 1.1.2.2 bouyer * bus, directly. For example, the _COMMAND_DATA, _MESSAGE, 49 1.1.2.2 bouyer * and _INPUT_OUTPUT bits and their values correspond directly 50 1.1.2.2 bouyer * to SCSI bus signals. 51 1.1.2.2 bouyer * 52 1.1.2.2 bouyer * Note: 53 1.1.2.2 bouyer * (r) indicates bit is read only. 54 1.1.2.2 bouyer * (rw) indicates bit is read or write. 55 1.1.2.2 bouyer */ 56 1.1.2.2 bouyer #define SUNSCPAL_ICR_PARITY_ERROR 0x8000 /* (r) parity error */ 57 1.1.2.2 bouyer #define SUNSCPAL_ICR_BUS_ERROR 0x4000 /* (r) bus error */ 58 1.1.2.2 bouyer #define SUNSCPAL_ICR_ODD_LENGTH 0x2000 /* (r) odd length */ 59 1.1.2.2 bouyer #define SUNSCPAL_ICR_INTERRUPT_REQUEST 0x1000 /* (r) interrupt request */ 60 1.1.2.2 bouyer #define SUNSCPAL_ICR_REQUEST 0x0800 /* (r) request */ 61 1.1.2.2 bouyer #define SUNSCPAL_ICR_MESSAGE 0x0400 /* (r) message */ 62 1.1.2.2 bouyer #define SUNSCPAL_ICR_COMMAND_DATA 0x0200 /* (r) 1=command, 0=data */ 63 1.1.2.2 bouyer #define SUNSCPAL_ICR_INPUT_OUTPUT 0x0100 /* (r) 1=input (initiator should read), 0=output */ 64 1.1.2.2 bouyer #define SUNSCPAL_ICR_PARITY 0x0080 /* (r) parity */ 65 1.1.2.2 bouyer #define SUNSCPAL_ICR_BUSY 0x0040 /* (r) busy */ 66 1.1.2.2 bouyer #define SUNSCPAL_ICR_SELECT 0x0020 /* (rw) select */ 67 1.1.2.2 bouyer #define SUNSCPAL_ICR_RESET 0x0010 /* (rw) reset */ 68 1.1.2.2 bouyer #define SUNSCPAL_ICR_PARITY_ENABLE 0x0008 /* (rw) enable parity */ 69 1.1.2.2 bouyer #define SUNSCPAL_ICR_WORD_MODE 0x0004 /* (rw) word mode */ 70 1.1.2.2 bouyer #define SUNSCPAL_ICR_DMA_ENABLE 0x0002 /* (rw) enable DMA */ 71 1.1.2.2 bouyer #define SUNSCPAL_ICR_INTERRUPT_ENABLE 0x0001 /* (rw) enable interrupts */ 72 1.1.2.2 bouyer 73 1.1.2.2 bouyer /* 74 1.1.2.2 bouyer * This chip keeps its DMA count with its bits flipped. Normally, you 75 1.1.2.2 bouyer * would just use the ~ operator everywhere. However, apparently that 76 1.1.2.2 bouyer * operator doesn't always work as you would expect, i.e.: 77 1.1.2.2 bouyer * 78 1.1.2.2 bouyer * #include <stdio.h> 79 1.1.2.2 bouyer * int main() { 80 1.1.2.2 bouyer * unsigned short x; 81 1.1.2.2 bouyer * int y; 82 1.1.2.2 bouyer * x = 0; 83 1.1.2.2 bouyer * y = ~x; 84 1.1.2.2 bouyer * printf("%d\n", y); 85 1.1.2.2 bouyer * } 86 1.1.2.2 bouyer * 87 1.1.2.2 bouyer * prints -1, not 65535. So this macro does the bit-flipping 88 1.1.2.2 bouyer * carefully for you. 89 1.1.2.2 bouyer */ 90 1.1.2.2 bouyer #define SUNSCPAL_DMA_COUNT_FLIP(x) (((unsigned short) (x)) ^ 0xFFFF) 91
Indexes created Sat Oct 25 10:09:55 GMT 2025