Home | History | Annotate | Line # | Download | only in eisa
eisareg.h revision 1.2 
      1 /*	$NetBSD: eisareg.h,v 1.2 1996/02/27 00:21:02 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Christopher G. Demetriou
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Christopher G. Demetriou
     18  *      for the NetBSD Project.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef __DEV_EISA_EISAREG_H__
     35 #define	__DEV_EISA_EISAREG_H__
     36 
     37 /*
     38  * Register (etc.) descriptions for the EISA bus.
     39 
     40  * Mostly culled from EISA chipset descriptions in:
     41  *	Intel Peripheral Components Databook (1992)
     42  */
     43 
     44 /*
     45  * Max number of EISA slots in a machine.  64K I/O space total.
     46  */
     47 #define	EISA_MAX_SLOT		16	/* number of slots.  0 -> 0xf */
     48 
     49 /*
     50  * Slot I/O space size, and I/O address of a given slot.
     51  */
     52 #define	EISA_SLOT_SIZE		0x1000
     53 #define	EISA_SLOT_ADDR(s)	((s) * EISA_SLOT_SIZE)
     54 
     55 /*
     56  * Slot offsets for important/standard registers.
     57  */
     58 #define	EISA_SLOTOFF_VID	0xc80		/* offset of vendor id regs */
     59 #define	EISA_NVIDREGS		2
     60 #define	EISA_SLOTOFF_PID	0xc82		/* offset of product id regs */
     61 #define	EISA_NPIDREGS		2
     62 
     63 
     64 /*
     65  * EISA ID functions, used to manipulate and decode EISA ID registers.
     66  * ``Somebody was let out without adult supervision.''
     67  */
     68 
     69 #define	EISA_IDSTRINGLEN	8	/* length of ID string, incl. NUL */
     70 
     71 /*
     72  * Vendor ID: three characters, encoded in 16 bits.
     73  *
     74  * EISA_VENDID_NODEV returns true if there's no device in the slot.
     75  * EISA_VENDID_IDDELAY returns true if there's a device in the slot,
     76  *	but that device hasn't been configured by system firmware.
     77  * EISA_VENDID_n returns the "n"th character of the vendor ID.
     78  */
     79 #define	EISA_VENDID_NODEV(vid)						\
     80 	    (((vid)[0] & 0x80) != 0)
     81 #define	EISA_VENDID_IDDELAY(vid)					\
     82 	    (((vid)[0] & 0xf0) == 0x70)
     83 #define	EISA_VENDID_0(vid)						\
     84 	    ((((vid)[0] & 0x7c) >> 2) + '@')
     85 #define	EISA_VENDID_1(vid)						\
     86 	    (((((vid)[0] & 0x03) << 3) | (((vid)[1] & 0xe0) >> 5)) + '@')
     87 #define	EISA_VENDID_2(vid)						\
     88 	    (((vid)[1] & 0x1f) + '@')
     89 
     90 /*
     91  * Product ID: four hex digits, encoded in 16 bits (normal, sort of).
     92  *
     93  * EISA_PRIDID_n returns the "n"th hex digit of the product ID.
     94  */
     95 #define	__EISA_HEX_MAP	"0123456789ABCDEF"
     96 #define	EISA_PRODID_0(pid)						\
     97 	    (__EISA_HEX_MAP[(((pid)[0] >> 4) & 0xf)])
     98 #define	EISA_PRODID_1(pid)						\
     99 	    (__EISA_HEX_MAP[(((pid)[0] >> 0) & 0xf)])
    100 #define	EISA_PRODID_2(pid)						\
    101 	    (__EISA_HEX_MAP[(((pid)[1] >> 4) & 0xf)])
    102 #define	EISA_PRODID_3(pid)						\
    103 	    (__EISA_HEX_MAP[(((pid)[1] >> 0) & 0xf)])
    104 
    105 #endif /* !__DEV_EISA_EISAREG_H__ */
    106