297 lines
8.1 KiB
C
297 lines
8.1 KiB
C
/* $NetBSD: lca.c,v 1.36 2000/06/29 08:58:47 mrg Exp $ */
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/*-
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* Copyright (c) 2000 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.
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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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* Authors: Jeffrey Hsu and 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_dec_axppci_33.h"
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#include "opt_dec_alphabook1.h"
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#include "opt_dec_eb66.h"
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: lca.c,v 1.36 2000/06/29 08:58:47 mrg Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <uvm/uvm_extern.h>
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#include <machine/autoconf.h>
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#include <machine/rpb.h>
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#include <machine/sysarch.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <alpha/pci/lcareg.h>
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#include <alpha/pci/lcavar.h>
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#ifdef DEC_AXPPCI_33
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#include <alpha/pci/pci_axppci_33.h>
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#endif
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#ifdef DEC_ALPHABOOK1
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#include <alpha/pci/pci_alphabook1.h>
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#endif
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#ifdef DEC_EB66
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#include <alpha/pci/pci_eb66.h>
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#endif
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int lcamatch __P((struct device *, struct cfdata *, void *));
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void lcaattach __P((struct device *, struct device *, void *));
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struct cfattach lca_ca = {
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sizeof(struct lca_softc), lcamatch, lcaattach,
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};
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extern struct cfdriver lca_cd;
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static int lcaprint __P((void *, const char *pnp));
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int lca_bus_get_window __P((int, int,
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struct alpha_bus_space_translation *));
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/* There can be only one. */
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int lcafound;
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struct lca_config lca_configuration;
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int
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lcamatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct mainbus_attach_args *ma = aux;
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/* Make sure that we're looking for a LCA. */
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if (strcmp(ma->ma_name, lca_cd.cd_name) != 0)
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return (0);
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if (lcafound)
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return (0);
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return (1);
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}
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/*
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* Set up the chipset's function pointers.
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*/
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void
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lca_init(lcp, mallocsafe)
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struct lca_config *lcp;
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int mallocsafe;
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{
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/*
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* The LCA HAE register is WRITE-ONLY, so we can't tell where
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* the second sparse window is actually mapped. Therefore,
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* we have to guess where it is. This seems to be the normal
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* address.
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*/
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lcp->lc_s_mem_w2_masked_base = 0x80000000;
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if (!lcp->lc_initted) {
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/* don't do these twice since they set up extents */
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lca_bus_io_init(&lcp->lc_iot, lcp);
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lca_bus_mem_init(&lcp->lc_memt, lcp);
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/*
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* We have 1 I/O window and 3 MEM windows.
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*/
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alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1;
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alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
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alpha_bus_get_window = lca_bus_get_window;
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}
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lcp->lc_mallocsafe = mallocsafe;
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lca_pci_init(&lcp->lc_pc, lcp);
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alpha_pci_chipset = &lcp->lc_pc;
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/*
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* Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors
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* Hardware Reference Manual''.
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* ...
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*/
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/*
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* According to section 6.4.1, all bits of the IOC_HAE register are
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* undefined after reset. Bits <31:27> are write-only. However, we
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* cannot blindly set it to zero. The serial ROM code that initializes
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* the PCI devices' address spaces, allocates sparse memory blocks in
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* the range that must use the IOC_HAE register for address translation,
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* and sets this register accordingly (see section 6.4.14).
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*
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* IOC_HAE left AS IS.
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*/
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/* According to section 6.4.2, all bits of the IOC_CONF register are
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* undefined after reset. Bits <1:0> are write-only. Set them to
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* 0x00 for PCI Type 0 configuration access.
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*
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* IOC_CONF set to ZERO.
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*/
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REGVAL64(LCA_IOC_CONF) = 0;
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lcp->lc_initted = 1;
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}
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void
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lcaattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct lca_softc *sc = (struct lca_softc *)self;
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struct lca_config *lcp;
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struct pcibus_attach_args pba;
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/* note that we've attached the chipset; can't have 2 LCAs. */
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/* Um, not sure about this. XXX JH */
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lcafound = 1;
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/*
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* set up the chipset's info; done once at console init time
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* (maybe), but we must do it twice to take care of things
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* that need to use memory allocation.
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*/
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lcp = sc->sc_lcp = &lca_configuration;
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lca_init(lcp, 1);
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/* XXX print chipset information */
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printf("\n");
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lca_dma_init(lcp);
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switch (cputype) {
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#ifdef DEC_AXPPCI_33
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case ST_DEC_AXPPCI_33:
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pci_axppci_33_pickintr(lcp);
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break;
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#endif
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#ifdef DEC_ALPHABOOK1
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case ST_ALPHABOOK1:
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pci_alphabook1_pickintr(lcp);
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break;
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#endif
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#ifdef DEC_EB66
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case ST_EB66:
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pci_eb66_pickintr(lcp);
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break;
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#endif
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default:
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panic("lcaattach: shouldn't be here, really...");
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}
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pba.pba_busname = "pci";
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pba.pba_iot = &lcp->lc_iot;
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pba.pba_memt = &lcp->lc_memt;
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pba.pba_dmat =
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alphabus_dma_get_tag(&lcp->lc_dmat_direct, ALPHA_BUS_PCI);
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pba.pba_pc = &lcp->lc_pc;
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pba.pba_bus = 0;
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pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
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PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
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config_found(self, &pba, lcaprint);
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}
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static int
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lcaprint(aux, pnp)
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void *aux;
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const char *pnp;
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{
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register struct pcibus_attach_args *pba = aux;
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/* only PCIs can attach to LCAes; easy. */
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if (pnp)
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printf("%s at %s", pba->pba_busname, pnp);
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printf(" bus %d", pba->pba_bus);
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return (UNCONF);
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}
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int
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lca_bus_get_window(type, window, abst)
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int type, window;
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struct alpha_bus_space_translation *abst;
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{
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struct lca_config *lcp = &lca_configuration;
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bus_space_tag_t st;
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switch (type) {
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case ALPHA_BUS_TYPE_PCI_IO:
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st = &lcp->lc_iot;
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break;
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case ALPHA_BUS_TYPE_PCI_MEM:
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st = &lcp->lc_memt;
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break;
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default:
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panic("lca_bus_get_window");
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}
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return (alpha_bus_space_get_window(st, window, abst));
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}
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