/* $NetBSD: lca.c,v 1.58 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.
*
* 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
[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: lca.c,v 1.58 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 <uvm/uvm_extern.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/lcareg.h>
#include <alpha/pci/lcavar.h>
static int lcamatch(device_t, cfdata_t, void *);
static void lcaattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(lca, sizeof(struct lca_softc),
lcamatch, lcaattach, NULL, NULL);
extern struct cfdriver lca_cd;
static int lca_bus_get_window(int, int,
struct alpha_bus_space_translation *);
/* There can be only one. */
struct lca_config lca_configuration;
static int lcafound;
static const u_int lca_bcache_sizes[__SHIFTOUT(MEMC_CAR_BCS, MEMC_CAR_BCS)] = {
[BCS_64K] = 64 * 1024,
[BCS_128K] = 128 * 1024,
[BCS_256K] = 256 * 1024,
[BCS_512K] = 512 * 1024,
[BCS_1M] = 1024 * 1024,
[BCS_2M] = 2048 * 1024,
/* Other values are reserved and we treat them as 0. */
};
static int
lcamatch(device_t parent, cfdata_t 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);
}
/*
* Probe the memory controller's Bcache configuration.
*/
void
lca_probe_bcache(void)
{
const uint64_t car = REGVAL64(LCA_MEMC_CAR);
if (lca_configuration.lc_bcache_size != 0) {
/* Already done. */
return;
}
if (car & MEMC_CAR_BCE) {
lca_configuration.lc_bcache_size =
lca_bcache_sizes[__SHIFTOUT(car, MEMC_CAR_BCS)];
} else {
lca_configuration.lc_bcache_size = 0;
}
if (lca_configuration.lc_bcache_size) {
uvmexp.ncolors = atop(lca_configuration.lc_bcache_size);
}
}
/*
* Set up the chipset's function pointers.
*/
void
lca_init(struct lca_config *lcp)
{
/*
* 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 */
lca_bus_io_init(&lcp->lc_iot, lcp);
lca_bus_mem_init(&lcp->lc_memt, lcp);
/*
* We have 1 I/O window and 3 MEM windows.
*/
alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1;
alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
alpha_bus_get_window = lca_bus_get_window;
}
lca_pci_init(&lcp->lc_pc, lcp);
alpha_pci_chipset = &lcp->lc_pc;
/*
* 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;
}
static void
lcaattach(device_t parent, device_t self, void *aux)
{
struct lca_softc *sc = device_private(self);
struct lca_config *lcp;
struct pcibus_attach_args pba;
/* note that we've attached the chipset; can't have 2 LCAs. */
lcafound = 1;
sc->sc_dev = self;
/*
* 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);
/* XXX print chipset information */
aprint_normal("\n");
if (lcp->lc_bcache_size != 0) {
char buf[sizeof("256 KB")];
if (format_bytes(buf, sizeof(buf), lcp->lc_bcache_size) > 0) {
aprint_normal_dev(self, "%s Bcache detected\n", buf);
}
}
lca_dma_init(lcp);
alpha_pci_intr_init(lcp, &lcp->lc_iot, &lcp->lc_memt, &lcp->lc_pc);
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_dmat64 = NULL;
pba.pba_pc = &lcp->lc_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
lca_bus_get_window(int type, int window,
struct alpha_bus_space_translation *abst)
{
struct lca_config *lcp = &lca_configuration;
bus_space_tag_t st;
switch (type) {
case ALPHA_BUS_TYPE_PCI_IO:
st = &lcp->lc_iot;
break;
case ALPHA_BUS_TYPE_PCI_MEM:
st = &lcp->lc_memt;
break;
default:
panic("lca_bus_get_window");
}
return (alpha_bus_space_get_window(st, window, abst));
}
