/* $NetBSD: mcbus.c,v 1.22 2012/02/06 02:14:14 matt Exp $ */ /* * Copyright (c) 1998 by Matthew Jacob * NASA AMES Research Center. * All rights reserved. * * 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 immediately at the beginning of the file, without modification, * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ /* * Autoconfiguration routines for the MCBUS system * bus found on AlphaServer 4100 systems. */ #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: mcbus.c,v 1.22 2012/02/06 02:14:14 matt Exp $"); #include #include #include #include #include #include #include #include #include #include #include "locators.h" #define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr))) #define MCPCIA_EXISTS(mid, gid) \ (!badaddr((void *)KV(MCPCIA_BRIDGE_ADDR(gid, mid)), sizeof (uint32_t))) extern struct cfdriver mcbus_cd; struct mcbus_cpu_busdep mcbus_primary; static int mcbusmatch(device_t, cfdata_t, void *); static void mcbusattach(device_t, device_t, void *); static int mcbusprint(void *, const char *); static const char *mcbus_node_type_str(uint8_t); typedef struct { uint8_t mcbus_types[MCBUS_MID_MAX]; } mcbus_softc_t; CFATTACH_DECL_NEW(mcbus, sizeof (mcbus_softc_t), mcbusmatch, mcbusattach, NULL, NULL); /* * Tru64 UNIX (formerly Digital UNIX (formerly DEC OSF/1)) probes for MCPCIAs * in the following order: * * 5, 4, 7, 6 * * This is so that the built-in CD-ROM on the internal 53c810 is always * dka500. We probe them in the same order, for consistency. */ const int mcbus_mcpcia_probe_order[] = { 5, 4, 7, 6 }; extern void mcpcia_config_cleanup(void); static int mcbusprint(void *aux, const char *cp) { struct mcbus_dev_attach_args *tap = aux; aprint_normal(" mid %d: %s", tap->ma_mid, mcbus_node_type_str(tap->ma_type)); return (UNCONF); } static int mcbusmatch(device_t parent, cfdata_t cf, void *aux) { struct mainbus_attach_args *ma = aux; /* Make sure we're looking for a MCBUS. */ if (strcmp(ma->ma_name, mcbus_cd.cd_name) != 0) return (0); /* * Only available on 4100 processor type platforms. */ if (cputype != ST_DEC_4100) return (0); return (1); } static void mcbusattach(device_t parent, device_t self, void *aux) { static const char * const bcs[CPU_BCacheMask + 1] = { "No", "1MB", "2MB", "4MB", }; struct mcbus_dev_attach_args ta; mcbus_softc_t *mbp = device_private(self); int i, mid; int locs[MCBUSCF_NLOCS]; printf(": %s BCache\n", mcbus_primary.mcbus_valid ? bcs[mcbus_primary.mcbus_bcache] : "Unknown"); mbp->mcbus_types[0] = MCBUS_TYPE_RES; for (mid = 1; mid < MCBUS_MID_MAX; ++mid) mbp->mcbus_types[mid] = MCBUS_TYPE_UNK; /* * Find and "configure" memory. */ /* * XXX If we ever support more than one MCBUS, we'll * XXX have to probe for them, and map them to unit * XXX numbers. */ ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0); ta.ma_mid = 1; ta.ma_type = MCBUS_TYPE_MEM; mbp->mcbus_types[1] = MCBUS_TYPE_MEM; locs[MCBUSCF_MID] = 1; (void) config_found_sm_loc(self, "mcbus", locs, &ta, mcbusprint, config_stdsubmatch); /* * Now find PCI busses. */ for (i = 0; i < MCPCIA_PER_MCBUS; i++) { mid = mcbus_mcpcia_probe_order[i]; /* * XXX If we ever support more than one MCBUS, we'll * XXX have to probe for them, and map them to unit * XXX numbers. */ ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0); ta.ma_mid = mid; ta.ma_type = MCBUS_TYPE_PCI; locs[MCBUSCF_MID] = mid; if (MCPCIA_EXISTS(ta.ma_mid, ta.ma_gid)) (void) config_found_sm_loc(self, "mcbus", locs, &ta, mcbusprint, config_stdsubmatch); } #if 0 /* * Deal with hooking CPU instances to MCBUS module ids. * * Note that we do this here because it's the read of * stupid MCPCIA WHOAMI register that can get us the * module ID and type of the configuring CPU. */ if (mcbus_primary.mcbus_valid) { mid = mcbus_primary.mcbus_cpu_mid; printf("%s mid %d: %s %s\n", device_xname(self), mid, mcbus_node_type_str(MCBUS_TYPE_CPU), bcs[mcbus_primary.mcbus_bcache & 0x7]); /* * XXX If we ever support more than one MCBUS, we'll * XXX have to probe for them, and map them to unit * XXX numbers. */ ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0); ta.ma_mid = mid; ta.ma_type = MCBUS_TYPE_CPU; mbp->mcbus_types[mid] = MCBUS_TYPE_CPU; locs[MCBUSCF_MID] = mid; (void) config_found_sm_loc(self, "mcbus", locs, &ta, mcbusprint, config_stdsubmatch); } #endif /* * Now clean up after configuring everything. * * This is an unfortunate layering violation- but * we can't enable interrupts until *all* probing * is done, but the code and knowledge to clean * up after probing and to enable interrupts is * down in the MCPCIA layer. */ mcpcia_config_cleanup(); } static const char * mcbus_node_type_str(uint8_t type) { switch (type) { case MCBUS_TYPE_RES: panic ("RESERVED TYPE IN MCBUS_NODE_TYPE_STR"); break; case MCBUS_TYPE_UNK: panic ("UNKNOWN TYPE IN MCBUS_NODE_TYPE_STR"); break; case MCBUS_TYPE_MEM: return ("Memory"); case MCBUS_TYPE_CPU: return ("CPU"); case MCBUS_TYPE_PCI: return ("PCI Bridge"); default: panic("REALLY UNKNWON (%x) TYPE IN MCBUS_NODE_TYPE_STR", type); break; } }