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/* $OpenBSD: lca.c,v 1.9 2001/02/16 05:17:31 jason Exp $ */
/* $NetBSD: lca.c,v 1.14 1996/12/05 01:39:35 cgd Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Authors: Jeffrey Hsu and Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <vm/vm.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/lcareg.h>
#include <alpha/pci/lcavar.h>
#ifdef DEC_AXPPCI_33
#include <alpha/pci/pci_axppci_33.h>
#endif
int lcamatch __P((struct device *, void *, void *));
void lcaattach __P((struct device *, struct device *, void *));
struct cfattach lca_ca = {
sizeof(struct lca_softc), lcamatch, lcaattach,
};
struct cfdriver lca_cd = {
NULL, "lca", DV_DULL,
};
int lcaprint __P((void *, const char *pnp));
/* There can be only one. */
int lcafound;
struct lca_config lca_configuration;
int
lcamatch(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct mainbus_attach_args *ma = aux;
/* Make sure that we're looking for a LCA. */
if (strcmp(ma->ma_name, lca_cd.cd_name) != 0)
return (0);
if (lcafound)
return (0);
return (1);
}
/*
* Set up the chipset's function pointers.
*/
void
lca_init(lcp, mallocsafe)
struct lca_config *lcp;
int mallocsafe;
{
/*
* The LCA HAE register is WRITE-ONLY, so we can't tell where
* the second sparse window is actually mapped. Therefore,
* we have to guess where it is. This seems to be the normal
* address.
*/
lcp->lc_s_mem_w2_masked_base = 0x80000000;
if (!lcp->lc_initted) {
/* don't do these twice since they set up extents */
lcp->lc_iot = lca_bus_io_init(lcp);
lcp->lc_memt = lca_bus_mem_init(lcp);
}
lcp->lc_mallocsafe = mallocsafe;
lca_pci_init(&lcp->lc_pc, lcp);
/*
* Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors
* Hardware Reference Manual''.
* ...
*/
/*
* According to section 6.4.1, all bits of the IOC_HAE register are
* undefined after reset. Bits <31:27> are write-only. However, we
* cannot blindly set it to zero. The serial ROM code that initializes
* the PCI devices' address spaces, allocates sparse memory blocks in
* the range that must use the IOC_HAE register for address translation,
* and sets this register accordingly (see section 6.4.14).
*
* IOC_HAE left AS IS.
*/
/* According to section 6.4.2, all bits of the IOC_CONF register are
* undefined after reset. Bits <1:0> are write-only. Set them to
* 0x00 for PCI Type 0 configuration access.
*
* IOC_CONF set to ZERO.
*/
REGVAL64(LCA_IOC_CONF) = 0;
lcp->lc_initted = 1;
}
void
lcaattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct lca_softc *sc = (struct lca_softc *)self;
struct lca_config *lcp;
struct pcibus_attach_args pba;
/* note that we've attached the chipset; can't have 2 LCAs. */
/* Um, not sure about this. XXX JH */
lcafound = 1;
/*
* set up the chipset's info; done once at console init time
* (maybe), but we must do it twice to take care of things
* that need to use memory allocation.
*/
lcp = sc->sc_lcp = &lca_configuration;
lca_init(lcp, 1);
/* XXX print chipset information */
printf("\n");
lca_dma_init(lcp);
switch (hwrpb->rpb_type) {
#ifdef DEC_AXPPCI_33
case ST_DEC_AXPPCI_33:
pci_axppci_33_pickintr(lcp);
break;
#endif
default:
panic("lcaattach: shouldn't be here, really...");
}
pba.pba_busname = "pci";
pba.pba_iot = lcp->lc_iot;
pba.pba_memt = lcp->lc_memt;
pba.pba_dmat = alphabus_dma_get_tag(&lcp->lc_dmat_direct,
ALPHA_BUS_PCI);
pba.pba_pc = &lcp->lc_pc;
pba.pba_bus = 0;
#ifdef notyet
pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
#endif
config_found(self, &pba, lcaprint);
}
int
lcaprint(aux, pnp)
void *aux;
const char *pnp;
{
register struct pcibus_attach_args *pba = aux;
/* only PCIs can attach to LCAes; easy. */
if (pnp)
printf("%s at %s", pba->pba_busname, pnp);
printf(" bus %d", pba->pba_bus);
return (UNCONF);
}
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