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- /*
- * Copyright (c) 1988 Regents of the University of California.
- * 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 the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
- *
- * @(#)vbaparam.h 7.3 (Berkeley) 6/28/90
- */
-
- /*
- * Parameters related to the VERSAbus i/o configuration.
- */
-
- /*
- * VERSAbus i/o devices use either memory mapped interfaces
- * or mapped i/o register banks, or some of both. Page tables
- * are allocated at boot time by each device driver, as needed.
- * VMEMmap is used to map a fixed size portion of the VERSAbus
- * i/o space, while VMEMmap1 maps dynamically defined portions
- * for devices which utilize shared i/o memory. VBmap is used
- * for mapping kernel intermediate buffers for DMA devices which
- * are incapable of utilizing user virtual addresses or which
- * require page aligned i/o buffers. The size of the VMEMmap1
- * VBmap tables must be large enough for the needs of all devices
- * in the system.
- */
- extern struct pte VMEMmap[], VMEMmap1[];
- extern caddr_t vmem1, vmemend;
- extern struct pte VBmap[];
- extern caddr_t vbbase, vbend;
-
- /*
- * The following macros relate to the segmentation of the VERSAbus
- * i/o space.
- *
- * The VERSAbus adapter segments the i/o space (as seen by the cpu)
- * into three regions. Cpu accesses to the upper 64Kb of the i/o space
- * generate VERSAbus cycles with a 16-bit address and a non-privileged
- * short i/o space address modifier. Accesses to the next 1Mb - 64Kb
- * generate 24-bit addresses and a non-privileged standard address
- * modifier. Accesses to the remainder of the 1Gb i/o space generate
- * 32-bit addresses with a non-privileged extended address modifier.
- * Beware that 32-bit addresses generated from this region always have
- * zero in the upper 2 bits; e.g. a reference to physical address fe000000
- * results in a VERSAbus address of 3e000000.
- */
- #define VBIO16BIT(a) ((unsigned)0xfffe0000 <= ((unsigned)(a)))
- #define VBIO24BIT(a) ((unsigned)0xff000000 <= ((unsigned)(a)) && \
- ((unsigned)(a)) < (unsigned)0xfffe0000)
- #define VBIO32BIT(a) (((unsigned)(a)) < (unsigned)0xff000000)
-
- /*
- * The following constants define the fixed size map of the
- * VERSAbus i/o space. The values should reflect the range
- * of i/o addresses used by all the controllers unprepared
- * to allocate and initialize their own page maps.
- */
- #define VBIOBASE 0xfff00000 /* base of VERSAbus address space */
- #define VBIOEND 0xffffee45 /* last address in mapped space */
- /* number of entries in the system page table for i/o space */
- #define VBIOSIZE btoc(VBIOEND-VBIOBASE)
- /* is device in mapped region */
- #define VBIOMAPPED(a) ((unsigned)VBIOBASE <= ((unsigned)(a)) && \
- ((unsigned)(a)) <= (unsigned)VBIOEND)
- #define vboff(addr) ((int)(((caddr_t)(addr)) - VBIOBASE))
-