/* $OpenBSD: crossreg.h,v 1.4 1996/11/28 23:33:07 niklas Exp $ */ /* * Copyright (c) 1994, 1996 Niklas Hallqvist, Carsten Hammer * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Niklas Hallqvist. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _CROSSREG_H_ #define _CROSSREG_H_ /*** * * * Hardware description: * * The CrossLink board is a 64K autoconfig device. The board address can be * read from the xlink.resource structure instead of searching with the * expansion library. In this way, the manufacturer ID is not required by * the software developer. * * Address mapping is as follows: * XL_ROM 16K of byte wide ROM appearing at even locations. * Used to hold the xlink.resource, and any autobooting * devices. * XL_MEM Memory space. For 8 bit cards, bytes appear at even * locations, (ie multiply address by 2). For 16 bit cards, * words appear at long word boundaries (ie multiply by * 2). You can read bytes from 16 bit cards - odd bytes * will appear at odd locations. SBHE must be set to the * appropriate value for this. Multiple pages are accessible * via the page register (see MemPage register). * XL_IO I/O space. 8K of I/O space is supported by the hardware, * however only 1K is managed by this resource (as IBM's * *never* have cards which decode more I/O space than this). * You should AllocPortSpace() the area you want to use to * get exclusive access before using the I/O. 8/16 bit cards * read/write bytes/words at word boundaries. (You should know * whether the port is 8 or 16 bits wide). * * Within the 1K I/O space, there are some 8 and 16 bit registers on the * xlink board itself. These registers are normally only accessed by * the xlink.resource, they are only described here for completeness. * Later revisions of the CrossLink board may move/change the meaning * of these registers. They are as follows: * (actual address = SBP_xxxx + SB_IO + board address) * * XLP_LATCH (Write Only) (offset = 2) * Latches most significant address lines. D0-D6 contain the * values for the most significant 7 address lines (A13-A19). * D7 contains data for SBHE line (always 1 for 8 bit transfers * on 8 bit boards, and 16 bit transfers on 16 bit boards. * Set SBHE to 0 to perform 8 bit transfers on 16 bit boards). * * XLP_INTABLE (Write Only) (offset = 0) * Interrupt Enable & Disable. Bits map to the interrupts in * the following manner: * Data Interrupt Data Interrupt * 2 10 10 2 * 3 11 11 3 * 4 12 12 4 * 5 Master 13 5 * 6 14 14 6 * 7 15 15 7 * Unused bits should not be interpreted in any way. When * writing to this register, unused bits should be zero. This * register should only be used by the xlink.resource. * * XLP_INTSTAT (Read Only) (offset = 0) * Interrupt Status. Bit mapping is the same as the * XLP_INTABLE location. Normally you only need to add your * interrupt handler to the appropriate port, and not worry * about this register. However, it can be also used to * determine which interrupt a board is connected to. **/ /* hardware offsets from config address */ #define CROSS_XL_ROM 0x8000 #define CROSS_XL_MEM 0x4000 #define CROSS_XL_IO 0x0000 #define CROSS_BANK_SIZE (CROSS_XL_ROM - CROSS_XL_MEM) #define CROSS_XLP_INTSTAT 0 #define CROSS_XLP_INTABLE 0 #define CROSS_XLP_LATCH 2 #define CROSS_HANDLE_TO_XLP_LATCH(va) \ ((volatile u_int16_t *)(((va) & 0xffff) | CROSS_XLP_LATCH)) #define CROSS_MEMORY_OFFSET (CROSS_XL_MEM - 2 * 0x90000) #define CROSS_SBHE 0x40 #define CROSS_STATUS_ADDR(va) \ ((volatile u_int16_t *)((va) + CROSS_XLP_INTSTAT)) #define CROSS_MASTER 5 #define CROSS_IRQ9 10 /* IRQ9 is an alias of IRQ2 */ #define CROSS_IRQ3 11 #define CROSS_IRQ4 12 #define CROSS_IRQ5 13 #define CROSS_IRQ6 14 #define CROSS_IRQ7 15 #define CROSS_IRQ10 2 #define CROSS_IRQ11 3 #define CROSS_IRQ12 4 #define CROSS_IRQ14 6 #define CROSS_IRQ15 7 #define CROSS_IRQMASK 0xfcdc #define CROSS_GET_INT_STATUS(va) (CROSS_GET_STATUS(va) & CROSS_IRQMASK) #define CROSS_ENABLE_INTS(va, ints) \ (*(volatile u_int16_t *)((va) + CROSS_XLP_INTABLE) = ints) #endif