/* $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 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/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)); }
