Return to vbaparam.h CVS log

Up to [Net/2] / Net2 / arch / tahoe / vba

Annotation of Net2/arch/tahoe/vba/vbaparam.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)vbaparam.h  7.3 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * Parameters related to the VERSAbus i/o configuration.
        !            38:  */
        !            39: 
        !            40: /*
        !            41:  * VERSAbus i/o devices use either memory mapped interfaces
        !            42:  * or mapped i/o register banks, or some of both.  Page tables
        !            43:  * are allocated at boot time by each device driver, as needed.
        !            44:  * VMEMmap is used to map a fixed size portion of the VERSAbus
        !            45:  * i/o space, while VMEMmap1 maps dynamically defined portions
        !            46:  * for devices which utilize shared i/o memory.  VBmap is used
        !            47:  * for mapping kernel intermediate buffers for DMA devices which
        !            48:  * are incapable of utilizing user virtual addresses or which
        !            49:  * require page aligned i/o buffers.  The size of the VMEMmap1
        !            50:  * VBmap tables must be large enough for the needs of all devices
        !            51:  * in the system.
        !            52:  */
        !            53: extern struct pte VMEMmap[], VMEMmap1[];
        !            54: extern caddr_t vmem1, vmemend;
        !            55: extern struct pte VBmap[];
        !            56: extern caddr_t vbbase, vbend; 
        !            57: 
        !            58: /*
        !            59:  * The following macros relate to the segmentation of the VERSAbus
        !            60:  * i/o space.
        !            61:  *
        !            62:  * The VERSAbus adapter segments the i/o space (as seen by the cpu)
        !            63:  * into three regions.  Cpu accesses to the upper 64Kb of the i/o space
        !            64:  * generate VERSAbus cycles with a 16-bit address and a non-privileged
        !            65:  * short i/o space address modifier.  Accesses to the next 1Mb - 64Kb
        !            66:  * generate 24-bit addresses and a non-privileged standard address
        !            67:  * modifier.  Accesses to the remainder of the 1Gb i/o space generate
        !            68:  * 32-bit addresses with a non-privileged extended address modifier.
        !            69:  * Beware that 32-bit addresses generated from this region always have
        !            70:  * zero in the upper 2 bits; e.g. a reference to physical address fe000000
        !            71:  * results in a VERSAbus address of 3e000000.
        !            72:  */
        !            73: #define        VBIO16BIT(a)    ((unsigned)0xfffe0000 <= ((unsigned)(a)))
        !            74: #define        VBIO24BIT(a)    ((unsigned)0xff000000 <= ((unsigned)(a)) && \
        !            75:                         ((unsigned)(a)) < (unsigned)0xfffe0000)
        !            76: #define        VBIO32BIT(a)    (((unsigned)(a)) < (unsigned)0xff000000)
        !            77: 
        !            78: /* 
        !            79:  * The following constants define the fixed size map of the
        !            80:  * VERSAbus i/o space.  The values should reflect the range
        !            81:  * of i/o addresses used by all the controllers unprepared
        !            82:  * to allocate and initialize their own page maps.
        !            83:  */
        !            84: #define VBIOBASE       0xfff00000      /* base of VERSAbus address space */
        !            85: #define VBIOEND                0xffffee45      /* last address in mapped space */
        !            86: /* number of entries in the system page table for i/o space */
        !            87: #define VBIOSIZE       btoc(VBIOEND-VBIOBASE)
        !            88: /* is device in mapped region */
        !            89: #define        VBIOMAPPED(a)   ((unsigned)VBIOBASE <= ((unsigned)(a)) && \
        !            90:                         ((unsigned)(a)) <= (unsigned)VBIOEND) 
        !            91: #define        vboff(addr)     ((int)(((caddr_t)(addr)) - VBIOBASE))

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.