Add code from NetBSD to print CIA capabilities and try to detect Pyxis bugs.
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Doug Rabson
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@ -23,8 +23,73 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: cia.c,v 1.5 1998/08/07 08:18:44 dfr Exp $
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* $Id: cia.c,v 1.6 1998/08/10 07:53:59 dfr Exp $
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*/
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include "opt_cpu.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -38,12 +103,14 @@
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#include <machine/swiz.h>
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#include <machine/intr.h>
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#include <machine/cpuconf.h>
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#include <machine/rpb.h>
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#define KV(pa) ALPHA_PHYS_TO_K0SEG(pa)
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static devclass_t cia_devclass;
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static device_t cia0; /* XXX only one for now */
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static u_int32_t cia_hae_mem;
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static int cia_rev, cia_ispyxis, cia_config;
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struct cia_softc {
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int junk; /* no softc */
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@ -499,8 +566,31 @@ cia_init()
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if (initted) return;
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initted = 1;
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cia_rev = REGVAL(CIA_CSR_REV) & REV_MASK;
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/*
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* Determine if we have a Pyxis. Only two systypes can
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* have this: the EB164 systype (AlphaPC164LX and AlphaPC164SX)
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* and the DEC_ST550 systype (Miata).
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*/
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if ((hwrpb->rpb_type == ST_EB164 &&
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(hwrpb->rpb_variation & SV_ST_MASK) >= SV_ST_ALPHAPC164LX_400) ||
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hwrpb->rpb_type == ST_DEC_550)
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cia_ispyxis = TRUE;
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else
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cia_ispyxis = FALSE;
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/*
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* ALCOR/ALCOR2 Revisions >= 2 and Pyxis have the CNFG register.
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*/
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if (cia_rev >= 2 || cia_ispyxis)
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cia_config = REGVAL(CIA_CSR_CNFG);
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else
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cia_config = 0;
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if (alpha_implver() != ALPHA_IMPLVER_EV5
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|| alpha_amask(ALPHA_AMASK_BWX))
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|| alpha_amask(ALPHA_AMASK_BWX)
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|| !(cia_config & CNFG_BWEN))
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chipset = cia_swiz_chipset;
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else
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chipset = cia_bwx_chipset;
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@ -531,10 +621,59 @@ static int
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cia_attach(device_t dev)
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{
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struct cia_softc* sc = CIA_SOFTC(dev);
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char* name;
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int pass;
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cia_init();
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chipset.intrdev = dev;
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name = cia_ispyxis ? "Pyxis" : "ALCOR/ALCOR2";
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if (cia_ispyxis) {
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name = "Pyxis";
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pass = cia_rev;
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} else {
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name = "ALCOR/ALCOR2";
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pass = cia_rev+1;
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}
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printf("cia0: %s, pass %d\n", name, pass);
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if (cia_config)
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printf("cia0: extended capabilities: %b\n",
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cia_config, CIA_CSR_CNFG_BITS);
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#ifdef DEC_ST550
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if (hwrpb->rpb_type == ST_DEC_550 &&
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(hwrpb->rpb_variation & SV_ST_MASK) < SV_ST_MIATA_1_5) {
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/*
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* Miata 1 systems have a bug: DMA cannot cross
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* an 8k boundary! Make sure PCI read prefetching
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* is disabled on these chips. Note that secondary
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* PCI busses don't have this problem, because of
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* the way PPBs handle PCI read requests.
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*
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* In the 21174 Technical Reference Manual, this is
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* actually documented as "Pyxis Pass 1", but apparently
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* there are chips that report themselves as "Pass 1"
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* which do not have the bug! Miatas with the Cypress
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* PCI-ISA bridge (i.e. Miata 1.5 and Miata 2) do not
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* have the bug, so we use this check.
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*
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* XXX We also need to deal with this boundary constraint
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* XXX in the PCI bus 0 (and ISA) DMA tags, but some
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* XXX drivers are going to need to be changed first.
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*/
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u_int32_t ctrl;
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/* XXX no bets... */
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printf("cia0: WARNING: Pyxis pass 1 DMA bug; no bets...\n");
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alpha_mb();
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ctrl = REGVAL(CIA_CSR_CTRL);
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ctrl &= ~(CTRL_RD_TYPE|CTRL_RL_TYPE|CTRL_RM_TYPE);
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REGVAL(CIA_CSR_CTRL) = ctrl;
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alpha_mb();
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}
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#endif
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if (!platform.iointr) /* XXX */
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set_iointr(alpha_dispatch_intr);
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