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320 lines
8.1 KiB
C
320 lines
8.1 KiB
C
/*-
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* Copyright (c) 2000 by Matthew Jacob
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Autoconfiguration and support routines for the main backplane bus
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* for Rawhide (Alpha 4100) systems.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <machine/cpuconf.h>
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#include <machine/md_var.h>
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#include <machine/rpb.h>
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#include <alpha/mcbus/mcbusreg.h>
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#include <alpha/mcbus/mcbusvar.h>
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#include <alpha/mcbus/mcpciavar.h>
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struct mcbus_device *mcbus_primary_cpu = NULL;
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#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
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#define NO_MCPCIA_AT(mid, gid) \
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(badaddr((void *)KV(MCPCIA_BRIDGE_ADDR(gid, mid)), sizeof (u_int32_t)))
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struct mcbus_softc {
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device_t mcbus_dev;
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driver_intr_t * sub_intr;
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u_int8_t mcbus_types[MCBUS_MID_MAX];
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};
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static void mcbus_add_child(struct mcbus_softc *, struct mcbus_device *);
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static void mcbus_intr(void *, u_long);
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static struct mcbus_softc * mcbus0_softc = NULL;
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static devclass_t mcbus_devclass;
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/*
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* Device methods
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*/
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static int mcbus_probe(device_t);
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static int mcbus_print_child(device_t, device_t);
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static int mcbus_read_ivar(device_t, device_t, int, u_long *);
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static int mcbus_setup_intr(device_t, device_t, struct resource *, int,
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driver_intr_t *, void *, void **);
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static int
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mcbus_teardown_intr(device_t, device_t, struct resource *, void *);
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static device_method_t mcbus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, mcbus_probe),
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DEVMETHOD(device_attach, bus_generic_attach),
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DEVMETHOD(device_detach, bus_generic_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* Bus interface */
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DEVMETHOD(bus_print_child, mcbus_print_child),
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DEVMETHOD(bus_read_ivar, mcbus_read_ivar),
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DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
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DEVMETHOD(bus_setup_intr, mcbus_setup_intr),
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DEVMETHOD(bus_teardown_intr, mcbus_teardown_intr),
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{ 0, 0 }
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};
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static driver_t mcbus_driver = {
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"mcbus", mcbus_methods, sizeof (struct mcbus_softc),
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};
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/*
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* Tru64 UNIX (formerly Digital UNIX (formerly DEC OSF/1)) probes for MCPCIAs
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* in the following order:
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*
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* 5, 4, 7, 6
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*
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* This is so that the built-in CD-ROM on the internal 53c810 is always
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* dka500. We probe them in the same order, for consistency.
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*/
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static const int mcbus_mcpcia_probe_order[] = { 5, 4, 7, 6 };
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/*
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* Early console support requires us to partially probe the bus to
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* find the ISA bus resources.
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*/
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void
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mcbus_init(void)
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{
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static int initted = 0;
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int i, mid, gid;
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if (initted) return;
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initted = 1;
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/*
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* We only look at the first two mids because at this point,
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* badaddr() doesn't work so we can't call NO_MCPCIA_AT().
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*/
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gid = MCBUS_GID_FROM_INSTANCE(0);
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for (i = 0; i < 2; ++i) {
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mid = mcbus_mcpcia_probe_order[i];
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if (NO_MCPCIA_AT(mid, gid)) {
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continue;
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}
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mcpcia_init(gid, mid);
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}
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}
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/*
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* At 'probe' time, we add all the devices which we know about to the
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* bus. The generic attach routine will probe and attach them if they
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* are alive.
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*/
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static int
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mcbus_probe(device_t dev)
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{
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struct mcbus_softc *sc = device_get_softc(dev);
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struct mcbus_device *mdev;
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int i, mid, gid;
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device_set_desc(dev, "MCBUS Backplane Bus");
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/*
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* XXX A note about GIDs...
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* XXX If we ever support more than one MCBUS, we'll
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* XXX have to probe for them, and map them to unit
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* XXX numbers.
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*/
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sc->mcbus_dev = dev;
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mcbus0_softc = sc;
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set_iointr(mcbus_intr);
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gid = MCBUS_GID_FROM_INSTANCE(0);
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mcbus0_softc->mcbus_types[0] = MCBUS_TYPE_RES;
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for (mid = 1; mid <= MCBUS_MID_MAX; mid++) {
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mcbus0_softc->mcbus_types[mid] = MCBUS_TYPE_UNK;
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}
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/*
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* First, add 'memory' children to probe.
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*/
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mdev = (struct mcbus_device *)
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malloc(sizeof (struct mcbus_device), M_DEVBUF, M_NOWAIT);
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if (!mdev) {
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printf("mcbus_probe: unable to malloc softc for memory dev\n");
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return (ENOMEM);
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}
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mdev->ma_gid = gid;
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mdev->ma_mid = 1;
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mdev->ma_order = MCPCIA_PER_MCBUS;
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mdev->ma_type = MCBUS_TYPE_MEM;
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mcbus0_softc->mcbus_types[1] = MCBUS_TYPE_MEM;
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mcbus_add_child(sc, mdev);
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/*
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* Now add I/O (MCPCIA) modules to probe (but only if they're there).
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*/
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for (i = 0; i < MCPCIA_PER_MCBUS; ++i) {
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mid = mcbus_mcpcia_probe_order[i];
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if (NO_MCPCIA_AT(mid, gid)) {
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continue;
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}
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mdev = (struct mcbus_device *)
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malloc(sizeof (struct mcbus_device), M_DEVBUF, M_NOWAIT);
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if (!mdev) {
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printf("mcbus_probe: unable to malloc for MCPCIA\n");
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continue;
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}
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mdev->ma_gid = gid;
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mdev->ma_mid = mid;
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mdev->ma_order = i;
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mdev->ma_type = MCBUS_TYPE_PCI;
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mcbus0_softc->mcbus_types[1] = MCBUS_TYPE_PCI;
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mcbus_add_child(sc, mdev);
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}
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/*
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* XXX: ToDo Add CPU nodes.
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*/
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return (0);
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}
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static int
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mcbus_print_child(device_t dev, device_t child)
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{
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struct mcbus_device *mdev = DEVTOMCBUS(child);
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int retval = 0;
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retval += bus_print_child_header(dev, child);
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retval += printf(" at %s gid %d mid %d\n",
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device_get_nameunit(dev), mdev->ma_gid, mdev->ma_mid);
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return (retval);
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}
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static int
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mcbus_read_ivar(device_t dev, device_t child, int index, u_long *result)
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{
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struct mcbus_device *mdev = DEVTOMCBUS(child);
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switch (index) {
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case MCBUS_IVAR_MID:
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*result = mdev->ma_mid;
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break;
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case MCBUS_IVAR_GID:
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*result = mdev->ma_gid;
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break;
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case MCBUS_IVAR_TYPE:
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*result = mdev->ma_type;
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break;
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}
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return (ENOENT);
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}
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static int
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mcbus_setup_intr(device_t dev, device_t child, struct resource *r, int f,
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driver_intr_t *intr, void *a, void **ac)
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{
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if (strncmp(device_get_name(child), "pcib", 6) == 0) {
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if (mcbus0_softc->sub_intr == NULL)
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mcbus0_softc->sub_intr = intr;
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return (0);
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} else {
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return (ENXIO);
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}
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}
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static int
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mcbus_teardown_intr(device_t dev, device_t child, struct resource *i, void *c)
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{
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if (strncmp(device_get_name(child), "pcib", 6) == 0) {
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mcbus0_softc->sub_intr = NULL;
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return (0);
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} else {
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return (ENXIO);
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}
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}
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static void
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mcbus_intr(void *frame, u_long vector)
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{
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if (vector && mcbus0_softc->sub_intr)
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(*mcbus0_softc->sub_intr)((void *)vector);
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}
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static void
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mcbus_add_child(struct mcbus_softc *mcbus, struct mcbus_device *mdev)
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{
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static int mcpciaproto, memproto, cpuproto;
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device_t cd;
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int un;
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char *dn, *ds;
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switch (mdev->ma_type) {
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case MCBUS_TYPE_PCI:
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dn = "pcib";
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ds = "MCPCIA PCI Bus Bridge";
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un = mcpciaproto++;
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break;
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case MCBUS_TYPE_MEM:
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dn = "mcmem";
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un = memproto++;
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ds = "MCBUS Memory Module";
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break;
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case MCBUS_TYPE_CPU:
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dn = "mccpu";
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un = cpuproto++;
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ds = "MCBUS Processor Module";
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break;
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default:
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printf("mcbus_add_child: unknown MCBUS type 0x%x\n",
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mdev->ma_type);
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return;
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}
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cd = device_add_child_ordered(mcbus->mcbus_dev, mdev->ma_type, dn, un);
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if (cd == NULL) {
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return;
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}
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device_set_ivars(cd, mdev);
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device_set_desc(cd, ds);
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}
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DRIVER_MODULE(mcbus, root, mcbus_driver, mcbus_devclass, 0, 0);
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