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From: caspi!strod@apollo.com (Eran Strod)
Newsgroups: comp.sys.sun
Subject: Question about mapin kernel function on the Sun 3x
Keywords: SunOS
Message-ID: <7291@brazos.Rice.edu>
Date: 1 May 90 14:06:07 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 33
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 147, message 7

This code is meant to execute as part of a device driver for a memory
mapped device on a Sun 3/470 (Sun 3X).  However, I'm not able to see the
device's memory.  What is wrong with this mapin call?  My device is
located at 0x5e000000.  Is the physpagenum argument wrong?  I got this
call working on a Sun3.

***************************************************************

unsigned long kmx; 	
struct pte *ppte;
unsigned int  vpagenum, physpagenum;
int    sizeinpages, access;
int	*access_AP; 	        
int     value;       

kmx = rmalloc ( kernelmap, (long) 1 );
ppte = &Sysmap[kmx];
vpagenum = btoc((Sysbase)) + kmx;
sizeinpages = 1;
access = PG_V | PG_W ;
access_AP = (int *) kmxtob ( kmx );
physpagenum = 0x5e000000 + 0x80000000; 
mapin (ppte, vpagenum, physpagenum, sizeinpages, access);

if ( peek ( access_AP, &value ) != -1 )
    printf ("Successfully mapped into the device\n");


***************************************************************

Eran Strod
cspi\!strod@apollo.com
decwrl!decvax!cspi!strod