sys/arch/alpha/tlsb/gbus.c

   1 /* $NetBSD: gbus.c,v 1.20 2009/03/14 14:45:54 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997 by Matthew Jacob
   5  * NASA AMES Research Center.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice immediately at the beginning of the file, without modification,
  13  *    this list of conditions, and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  24  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Autoconfiguration and support routines for the Gbus: the internal
  35  * bus on AlphaServer CPU modules.
  36  */
  37
  38 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  39
  40 __KERNEL_RCSID(0, "$NetBSD: gbus.c,v 1.20 2009/03/14 14:45:54 dsl Exp $");
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/device.h>
  45
  46 #include <machine/rpb.h>
  47 #include <machine/pte.h>
  48
  49 #include <alpha/tlsb/gbusreg.h>
  50 #include <alpha/tlsb/gbusvar.h>
  51
  52 #include <alpha/tlsb/tlsbreg.h>
  53 #include <alpha/tlsb/tlsbvar.h>
  54
  55 #include "locators.h"
  56
  57 #define KV(_addr)       ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
  58
  59 struct gbus_softc {
  60         struct device   sc_dev;
  61         int             sc_tlsbnode;    /* node on the TurboLaser */
  62 };
  63
  64 static int      gbusmatch(struct device *, struct cfdata *, void *);
  65 static void     gbusattach(struct device *, struct device *, void *);
  66
  67 CFATTACH_DECL(gbus, sizeof(struct gbus_softc),
  68     gbusmatch, gbusattach, NULL, NULL);
  69
  70 static int      gbusprint(void *, const char *);
  71
  72 struct gbus_attach_args gbus_children[] = {
  73         { "zsc",        GBUS_DUART0_OFFSET },
  74         { "zsc",        GBUS_DUART1_OFFSET },
  75         { "mcclock",    GBUS_CLOCK_OFFSET },
  76         { NULL,         0 },
  77 };
  78
  79 static int
  80 gbusprint(void *aux, const char *pnp)
  81 {
  82         struct gbus_attach_args *ga = aux;
  83
  84         if (pnp)
  85                 aprint_normal("%s at %s", ga->ga_name, pnp);
  86         aprint_normal(" offset 0x%lx", ga->ga_offset);
  87         return (UNCONF);
  88 }
  89
  90 static int
  91 gbusmatch(struct device *parent, struct cfdata *cf, void *aux)
  92 {
  93         struct tlsb_dev_attach_args *ta = aux;
  94
  95         /*
  96          * Make sure we're looking for a Gbus.  The Gbus only
  97          * "exists" on the CPU module that holds the primary CPU.
  98          *
  99          * Compute which node this should exist on by dividing the
 100          * primary CPU by 2 (since there are up to 2 CPUs per CPU
 101          * module).
 102          */
 103         if (TLDEV_ISCPU(ta->ta_dtype) &&
 104             ta->ta_node == (hwrpb->rpb_primary_cpu_id / 2))
 105                 return (1);
 106
 107         return (0);
 108 }
 109
 110 static void
 111 gbusattach(struct device *parent, struct device *self, void *aux)
 112 {
 113         struct gbus_softc *sc = (struct gbus_softc *)self;
 114         struct tlsb_dev_attach_args *ta = aux;
 115         struct gbus_attach_args *ga;
 116         int locs[GBUSCF_NLOCS];
 117
 118         printf("\n");
 119
 120         sc->sc_tlsbnode = ta->ta_node;
 121
 122         /* Attach the children. */
 123         for (ga = gbus_children; ga->ga_name != NULL; ga++) {
 124                 locs[GBUSCF_OFFSET] = ga->ga_offset;
 125                 (void) config_found_sm_loc(self, "gbus", locs, ga,
 126                                            gbusprint, config_stdsubmatch);
 127         }
 128 }