/* $NetBSD: apecs.c,v 1.60 2023/12/04 00:32:10 thorpej Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: 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
[email protected]
* 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/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: apecs.c,v 1.60 2023/12/04 00:32:10 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <machine/sysarch.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/apecsreg.h>
#include <alpha/pci/apecsvar.h>
static int apecsmatch(device_t, cfdata_t, void *);
static void apecsattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(apecs, 0, apecsmatch, apecsattach, NULL, NULL);
extern struct cfdriver apecs_cd;
static int apecs_bus_get_window(int, int,
struct alpha_bus_space_translation *);
/* There can be only one. */
static int apecsfound;
struct apecs_config apecs_configuration;
static int
apecsmatch(device_t parent, cfdata_t match, void *aux)
{
struct mainbus_attach_args *ma = aux;
/* Make sure that we're looking for an APECS. */
if (strcmp(ma->ma_name, apecs_cd.cd_name) != 0)
return (0);
if (apecsfound)
return (0);
return (1);
}
/*
* Set up the chipset's function pointers.
*/
void
apecs_init(struct apecs_config *acp)
{
acp->ac_comanche_pass2 =
(REGVAL(COMANCHE_ED) & COMANCHE_ED_PASS2) != 0;
acp->ac_memwidth =
(REGVAL(COMANCHE_GCR) & COMANCHE_GCR_WIDEMEM) != 0 ? 128 : 64;
acp->ac_epic_pass2 =
(REGVAL(EPIC_DCSR) & EPIC_DCSR_PASS2) != 0;
acp->ac_haxr1 = REGVAL(EPIC_HAXR1);
acp->ac_haxr2 = REGVAL(EPIC_HAXR2);
if (!acp->ac_initted) {
/* don't do these twice since they set up extents */
apecs_bus_io_init(&acp->ac_iot, acp);
apecs_bus_mem_init(&acp->ac_memt, acp);
/*
* We have two I/O windows and 3 MEM windows.
*/
alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 2;
alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
alpha_bus_get_window = apecs_bus_get_window;
}
apecs_pci_init(&acp->ac_pc, acp);
alpha_pci_chipset = &acp->ac_pc;
acp->ac_initted = 1;
}
static void
apecsattach(device_t parent, device_t self, void *aux)
{
struct apecs_config *acp;
struct pcibus_attach_args pba;
/* note that we've attached the chipset; can't have 2 APECSes. */
apecsfound = 1;
/*
* set up the chipset's info; done once at console init time
* (maybe), but doesn't hurt to do twice.
*/
acp = &apecs_configuration;
apecs_init(acp);
apecs_dma_init(acp);
aprint_normal(": DECchip %s Core Logic chipset\n",
acp->ac_memwidth == 128 ? "21072" : "21071");
aprint_normal_dev(self, "DC21071-CA pass %d, %d-bit memory bus\n",
acp->ac_comanche_pass2 ? 2 : 1, acp->ac_memwidth);
aprint_normal_dev(self, "DC21071-DA pass %d\n",
acp->ac_epic_pass2 ? 2 : 1);
/* XXX print bcache size */
if (!acp->ac_epic_pass2)
printf("WARNING: 21071-DA NOT PASS2... NO BETS...\n");
alpha_pci_intr_init(acp, &acp->ac_iot, &acp->ac_memt, &acp->ac_pc);
pba.pba_iot = &acp->ac_iot;
pba.pba_memt = &acp->ac_memt;
pba.pba_dmat =
alphabus_dma_get_tag(&acp->ac_dmat_direct, ALPHA_BUS_PCI);
pba.pba_dmat64 = NULL;
pba.pba_pc = &acp->ac_pc;
pba.pba_bus = 0;
pba.pba_bridgetag = NULL;
pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY |
PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
config_found(self, &pba, pcibusprint, CFARGS_NONE);
}
static int
apecs_bus_get_window(int type, int window,
struct alpha_bus_space_translation *abst)
{
struct apecs_config *acp = &apecs_configuration;
bus_space_tag_t st;
switch (type) {
case ALPHA_BUS_TYPE_PCI_IO:
st = &acp->ac_iot;
break;
case ALPHA_BUS_TYPE_PCI_MEM:
st = &acp->ac_memt;
break;
default:
panic("apecs_bus_get_window");
}
return (alpha_bus_space_get_window(st, window, abst));
}
