396 lines
12 KiB
C
396 lines
12 KiB
C
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/* $NetBSD: if_ie_vme.c,v 1.1 1997/11/01 22:56:21 pk Exp $ */
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/*-
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* Copyright (c) 1995 Charles D. Cranor
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Converted to SUN ie driver by Charles D. Cranor,
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* October 1994, January 1995.
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*/
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/*
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* The i82586 is a very painful chip, found in sun3's, sun-4/100's
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* sun-4/200's, and VME based suns. The byte order is all wrong for a
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* SUN, making life difficult. Programming this chip is mostly the same,
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* but certain details differ from system to system. This driver is
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* written so that different "ie" interfaces can be controled by the same
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* driver.
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*/
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/*
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* programming notes:
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*
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* the ie chip operates in a 24 bit address space.
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*
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* most ie interfaces appear to be divided into two parts:
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* - generic 586 stuff
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* - board specific
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*
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* generic:
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* the generic stuff of the ie chip is all done with data structures
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* that live in the chip's memory address space. the chip expects
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* its main data structure (the sys conf ptr -- SCP) to be at a fixed
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* address in its 24 bit space: 0xfffff4
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*
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* the SCP points to another structure called the ISCP.
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* the ISCP points to another structure called the SCB.
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* the SCB has a status field, a linked list of "commands", and
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* a linked list of "receive buffers". these are data structures that
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* live in memory, not registers.
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*
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* board:
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* to get the chip to do anything, you first put a command in the
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* command data structure list. then you have to signal "attention"
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* to the chip to get it to look at the command. how you
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* signal attention depends on what board you have... on PC's
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* there is an i/o port number to do this, on sun's there is a
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* register bit you toggle.
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*
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* to get data from the chip you program it to interrupt...
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*
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*
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* sun issues:
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*
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* there are 3 kinds of sun "ie" interfaces:
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* 1 - a VME/multibus card
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* 2 - an on-board interface (sun3's, sun-4/100's, and sun-4/200's)
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* 3 - another VME board called the 3E
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*
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* the VME boards lives in vme16 space. only 16 and 8 bit accesses
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* are allowed, so functions that copy data must be aware of this.
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*
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* the chip is an intel chip. this means that the byte order
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* on all the "short"s in the chip's data structures is wrong.
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* so, constants described in the intel docs are swapped for the sun.
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* that means that any buffer pointers you give the chip must be
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* swapped to intel format. yuck.
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*
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* VME/multibus interface:
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* for the multibus interface the board ignores the top 4 bits
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* of the chip address. the multibus interface seems to have its
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* own MMU like page map (without protections or valid bits, etc).
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* there are 256 pages of physical memory on the board (each page
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* is 1024 bytes). there are 1024 slots in the page map. so,
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* a 1024 byte page takes up 10 bits of address for the offset,
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* and if there are 1024 slots in the page that is another 10 bits
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* of the address. that makes a 20 bit address, and as stated
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* earlier the board ignores the top 4 bits, so that accounts
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* for all 24 bits of address.
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*
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* note that the last entry of the page map maps the top of the
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* 24 bit address space and that the SCP is supposed to be at
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* 0xfffff4 (taking into account allignment). so,
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* for multibus, that entry in the page map has to be used for the SCP.
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*
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* the page map effects BOTH how the ie chip sees the
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* memory, and how the host sees it.
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*
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* the page map is part of the "register" area of the board
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*
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* on-board interface:
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*
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* <fill in useful info later>
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*
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*
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* VME3E interface:
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*
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* <fill in useful info later>
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_dl.h>
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#include <net/if_ether.h>
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#include <vm/vm.h>
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#include <machine/bus.h>
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#include <dev/vme/vmevar.h>
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#include <dev/ic/i82586reg.h>
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#include <dev/ic/i82586var.h>
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/*
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* VME/multibus definitions
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*/
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#define IEVME_PAGESIZE 1024 /* bytes */
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#define IEVME_PAGSHIFT 10 /* bits */
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#define IEVME_NPAGES 256 /* number of pages on chip */
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#define IEVME_MAPSZ 1024 /* number of entries in the map */
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/*
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* PTE for the page map
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*/
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#define IEVME_SBORDR 0x8000 /* sun byte order */
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#define IEVME_IBORDR 0x0000 /* intel byte ordr */
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#define IEVME_P2MEM 0x2000 /* memory is on P2 */
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#define IEVME_OBMEM 0x0000 /* memory is on board */
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#define IEVME_PGMASK 0x0fff /* gives the physical page frame number */
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struct ievme {
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u_int16_t pgmap[IEVME_MAPSZ];
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u_int16_t xxx[32]; /* prom */
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u_int16_t status; /* see below for bits */
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u_int16_t xxx2; /* filler */
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u_int16_t pectrl; /* parity control (see below) */
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u_int16_t peaddr; /* low 16 bits of address */
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};
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/*
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* status bits
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*/
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#define IEVME_RESET 0x8000 /* reset board */
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#define IEVME_ONAIR 0x4000 /* go out of loopback 'on-air' */
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#define IEVME_ATTEN 0x2000 /* attention */
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#define IEVME_IENAB 0x1000 /* interrupt enable */
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#define IEVME_PEINT 0x0800 /* parity error interrupt enable */
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#define IEVME_PERR 0x0200 /* parity error flag */
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#define IEVME_INT 0x0100 /* interrupt flag */
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#define IEVME_P2EN 0x0020 /* enable p2 bus */
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#define IEVME_256K 0x0010 /* 256kb rams */
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#define IEVME_HADDR 0x000f /* mask for bits 17-20 of address */
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/*
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* parity control
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*/
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#define IEVME_PARACK 0x0100 /* parity error ack */
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#define IEVME_PARSRC 0x0080 /* parity error source */
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#define IEVME_PAREND 0x0040 /* which end of the data got the error */
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#define IEVME_PARADR 0x000f /* mask to get bits 17-20 of parity address */
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/*
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* the 3E board not supported (yet?)
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*/
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static void ie_vmereset __P((struct ie_softc *));
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static void ie_vmeattend __P((struct ie_softc *));
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static void ie_vmerun __P((struct ie_softc *));
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static int ie_vmeintr __P((struct ie_softc *));
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static caddr_t ie_align __P((caddr_t));
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int ie_vme_match __P((struct device *, struct cfdata *, void *));
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void ie_vme_attach __P((struct device *, struct device *, void *));
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struct cfattach ie_vme_ca = {
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sizeof(struct ie_softc), ie_vme_match, ie_vme_attach
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};
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/*
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* MULTIBUS/VME support routines
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*/
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void
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ie_vmereset(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (struct ievme *) sc->sc_reg;
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iev->status = IEVME_RESET;
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delay(100); /* XXX could be shorter? */
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iev->status = 0;
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}
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void
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ie_vmeattend(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (struct ievme *) sc->sc_reg;
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iev->status |= IEVME_ATTEN; /* flag! */
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iev->status &= ~IEVME_ATTEN; /* down. */
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}
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void
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ie_vmerun(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (struct ievme *) sc->sc_reg;
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iev->status |= (IEVME_ONAIR | IEVME_IENAB | IEVME_PEINT);
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}
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int
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ie_vmeintr(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (volatile struct ievme *)sc->sc_reg;
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/*
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* check for parity error
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*/
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if (iev->status & IEVME_PERR) {
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printf("%s: parity error (ctrl 0x%x @ 0x%02x%04x)\n",
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sc->sc_dev.dv_xname, iev->pectrl,
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iev->pectrl & IEVME_HADDR, iev->peaddr);
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iev->pectrl = iev->pectrl | IEVME_PARACK;
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}
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return (0);
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}
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caddr_t
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ie_align(ptr)
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caddr_t ptr;
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{
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u_long l = (u_long)ptr;
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l = (l + 3) & ~3L;
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return (caddr_t)l;
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}
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int
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ie_vme_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct vme_attach_args *va = aux;
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vme_chipset_tag_t ct = va->vma_chipset_tag;
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bus_space_tag_t bt = va->vma_bustag;
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int mod;
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mod = VMEMOD_A24 | VMEMOD_S | VMEMOD_D;
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if (vme_bus_probe(ct, bt, va->vma_reg[0], 2, mod))
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return (1);
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return (0);
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}
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void
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ie_vme_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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u_int8_t myaddr[ETHER_ADDR_LEN];
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extern void myetheraddr(u_char *); /* should be elsewhere */
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struct ie_softc *sc = (void *) self;
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struct vme_attach_args *va = aux;
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vme_chipset_tag_t ct = va->vma_chipset_tag;
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bus_space_tag_t bt = va->vma_bustag;
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bus_space_handle_t bh;
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vme_intr_handle_t ih;
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volatile struct ievme *iev;
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u_long rampaddr;
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int lcv;
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vme_size_t sz;
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int mod;
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/*
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* *note*: we don't detect the difference between a VME3E and
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* a multibus/vme card. if you want to use a 3E you'll have
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* to fix this.
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*/
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mod = VMEMOD_A24 | VMEMOD_S | VMEMOD_D;
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#if 0
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sc->dmat = va->vma_dmatag;
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#endif
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sc->bt = bt;
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sc->hwreset = ie_vmereset;
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sc->hwinit = ie_vmerun;
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sc->chan_attn = ie_vmeattend;
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sc->align = ie_align;
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sc->intrhook = ie_vmeintr;
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sc->memcopy = wcopy;
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sc->memzero = wzero;
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sc->sc_msize = 4*65536; /* XXX */
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sz = sizeof(struct ievme);
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if (vme_bus_map(ct, va->vma_reg[0], sz, mod, bt, &bh) != 0)
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panic("if_ie: vme_map");
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sc->sc_reg = (caddr_t)bh;
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iev = (volatile struct ievme *) sc->sc_reg;
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/* top 12 bits */
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rampaddr = (u_long)va->vma_reg[0] & 0xfff00000;
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/* 4 more */
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rampaddr = rampaddr | ((iev->status & IEVME_HADDR) << 16);
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sz = sc->sc_msize;
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if (vme_bus_map(ct, rampaddr, sz, mod, bt, &bh) != 0)
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panic("if_ie: vme_map");
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sc->sc_maddr = (caddr_t)bh;
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sc->sc_iobase = sc->sc_maddr;
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iev->pectrl = iev->pectrl | IEVME_PARACK; /* clear to start */
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/*
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* Set up mappings, direct map except for last page
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* which is mapped at zero and at high address (for scp)
|
||
|
|
*/
|
||
|
|
for (lcv = 0; lcv < IEVME_MAPSZ - 1; lcv++)
|
||
|
|
iev->pgmap[lcv] = IEVME_SBORDR | IEVME_OBMEM | lcv;
|
||
|
|
iev->pgmap[IEVME_MAPSZ - 1] = IEVME_SBORDR | IEVME_OBMEM | 0;
|
||
|
|
|
||
|
|
/* Clear all ram */
|
||
|
|
(sc->memzero)(sc->sc_maddr, sc->sc_msize);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* set up pointers to data structures and buffer area.
|
||
|
|
* scp is in double mapped page... get offset into page
|
||
|
|
* and add to sc_maddr.
|
||
|
|
*/
|
||
|
|
sc->scp = (volatile struct ie_sys_conf_ptr *)
|
||
|
|
(sc->sc_maddr + (IE_SCP_ADDR & (IEVME_PAGESIZE - 1)));
|
||
|
|
|
||
|
|
/* iscp at location zero */
|
||
|
|
sc->iscp = (volatile struct ie_int_sys_conf_ptr *)sc->sc_maddr;
|
||
|
|
|
||
|
|
/* scb follows iscp */
|
||
|
|
sc->scb = (volatile struct ie_sys_ctl_block *)
|
||
|
|
sc->sc_maddr + sizeof(struct ie_int_sys_conf_ptr);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Rest of first page is unused; rest of ram for buffers.
|
||
|
|
*/
|
||
|
|
sc->buf_area = sc->sc_maddr + IEVME_PAGESIZE;
|
||
|
|
sc->buf_area_sz = sc->sc_msize - IEVME_PAGESIZE;
|
||
|
|
|
||
|
|
myetheraddr(myaddr);
|
||
|
|
ie_attach(sc, "multibus/vme", myaddr);
|
||
|
|
|
||
|
|
vme_intr_map(ct, va->vma_vec, va->vma_pri, &ih);
|
||
|
|
vme_intr_establish(ct, ih, ieintr, sc);
|
||
|
|
}
|