Path: utzoo!attcan!uunet!husc6!mailrus!ames!ubvax!lll-winken!lll-crg.llnl.gov!bowles
From: bowles@lll-crg.llnl.gov (Jeff Bowles)
Newsgroups: comp.unix.microport
Subject: Re: Physical Memory allocation
Keywords: allocation of memory at a particular place.
Message-ID: <8866@lll-winken.llnl.gov>
Date: 20 Jun 88 16:01:18 GMT
References: <4490@killer.UUCP>
Sender: usenet@lll-winken.llnl.gov
Reply-To: bowles@lll-crg.llnl.gov.UUCP (Jeff Bowles)
Organization: Lawrence Livermore National Laboratory
Lines: 38

In article <4490@killer.UUCP> egs@killer.UUCP (Eric Schnoebelen) writes:

>	I need to allocate a particular piece of memory for a driver.  The
>card has an onboard buffer in ROM space on the PC that the driver needs to
>be able to read and write....

#include <sys/types.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <sys/immu.h>
#include <sys/file.h>
#include <sys/region.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <sys/sysmacros.h>
#include <sys/stream.h>
#include <sys/strlog.h>
#include <sys/stropts.h>
#include <sys/user.h>
#include <sys/errno.h>
#include <sys/cmn_err.h>

	{
	char *p = (struct cmm_regs *)sptalloc( btoc(WORKSIZE),
		PG_RW | PG_P , pfnum(BOARDADDR), 0);
	
**********************************

For me, this worked on the Bell Tech Unix SVR3; I believe it's consistent
with all things ported from the 3B2 - BOARDADDR in this case was something
like 0xE00000 and WORKSIZE was something like 8192, but I don't remember.

You can guess the arguments - "I need a workspace of size <arg1> in clicks
to be mapped into kernel space with permissions RW (read/write) and P (present).
The address is page frame number <pfnum(<arg3>. I don't know about the
last arg."

	Jeff Bowles