92ceafffd0
of 1 so that it is not probed until after acpi0 is probed and attached. - In legacy_probe(), return ENXIO if acpi0 is around and alive. - nexus_attach() is now much simpler and just lets its child drivers do all the work.
579 lines
16 KiB
C
579 lines
16 KiB
C
/*
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* Copyright 1998 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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* $FreeBSD$
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*/
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/*
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* This code implements a `root nexus' for Intel Architecture
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* machines. The function of the root nexus is to serve as an
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* attachment point for both processors and buses, and to manage
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* resources which are common to all of them. In particular,
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* this code implements the core resource managers for interrupt
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* requests, DMA requests (which rightfully should be a part of the
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* ISA code but it's easier to do it here for now), I/O port addresses,
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* and I/O memory address space.
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*/
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#include "opt_isa.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <sys/interrupt.h>
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#include <machine/vmparam.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/pmap.h>
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#include <machine/resource.h>
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#ifdef APIC_IO
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#include <machine/smp.h>
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#include <machine/mpapic.h>
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#endif
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#ifdef DEV_ISA
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#include <isa/isavar.h>
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#ifdef PC98
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#include <pc98/pc98/pc98.h>
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#else
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#include <i386/isa/isa.h>
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#endif
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#endif
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#include <i386/isa/icu.h>
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#include <i386/isa/intr_machdep.h>
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#include <sys/rtprio.h>
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static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
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struct nexus_device {
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struct resource_list nx_resources;
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};
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#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
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static struct rman irq_rman, drq_rman, port_rman, mem_rman;
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static int nexus_probe(device_t);
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static int nexus_attach(device_t);
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static int nexus_print_all_resources(device_t dev);
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static int nexus_print_child(device_t, device_t);
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static device_t nexus_add_child(device_t bus, int order, const char *name,
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int unit);
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static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
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u_long, u_long, u_long, u_int);
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static int nexus_activate_resource(device_t, device_t, int, int,
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struct resource *);
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static int nexus_deactivate_resource(device_t, device_t, int, int,
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struct resource *);
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static int nexus_release_resource(device_t, device_t, int, int,
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struct resource *);
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static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
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void (*)(void *), void *, void **);
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static int nexus_teardown_intr(device_t, device_t, struct resource *,
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void *);
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static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long);
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static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
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static void nexus_delete_resource(device_t, device_t, int, int);
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static device_method_t nexus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, nexus_probe),
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DEVMETHOD(device_attach, nexus_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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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, nexus_print_child),
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DEVMETHOD(bus_add_child, nexus_add_child),
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DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
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DEVMETHOD(bus_release_resource, nexus_release_resource),
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DEVMETHOD(bus_activate_resource, nexus_activate_resource),
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DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
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DEVMETHOD(bus_setup_intr, nexus_setup_intr),
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DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
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DEVMETHOD(bus_set_resource, nexus_set_resource),
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DEVMETHOD(bus_get_resource, nexus_get_resource),
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DEVMETHOD(bus_delete_resource, nexus_delete_resource),
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{ 0, 0 }
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};
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static driver_t nexus_driver = {
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"nexus",
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nexus_methods,
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1, /* no softc */
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};
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static devclass_t nexus_devclass;
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DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
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static int
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nexus_probe(device_t dev)
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{
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device_quiet(dev); /* suppress attach message for neatness */
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/*
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* XXX working notes:
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*
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* - IRQ resource creation should be moved to the PIC/APIC driver.
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* - DRQ resource creation should be moved to the DMAC driver.
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* - The above should be sorted to probe earlier than any child busses.
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*
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* - Leave I/O and memory creation here, as child probes may need them.
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* (especially eg. ACPI)
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*/
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/*
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* IRQ's are on the mainboard on old systems, but on the ISA part
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* of PCI->ISA bridges. There would be multiple sets of IRQs on
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* multi-ISA-bus systems. PCI interrupts are routed to the ISA
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* component, so in a way, PCI can be a partial child of an ISA bus(!).
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* APIC interrupts are global though.
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*
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* XXX We depend on the AT PIC driver correctly claiming IRQ 2
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* to prevent its reuse elsewhere in the !APIC_IO case.
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*/
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irq_rman.rm_start = 0;
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irq_rman.rm_type = RMAN_ARRAY;
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irq_rman.rm_descr = "Interrupt request lines";
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#ifdef APIC_IO
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irq_rman.rm_end = APIC_INTMAPSIZE - 1;
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#else
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irq_rman.rm_end = 15;
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#endif
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if (rman_init(&irq_rman)
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|| rman_manage_region(&irq_rman,
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irq_rman.rm_start, irq_rman.rm_end))
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panic("nexus_probe irq_rman");
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/*
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* ISA DMA on PCI systems is implemented in the ISA part of each
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* PCI->ISA bridge and the channels can be duplicated if there are
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* multiple bridges. (eg: laptops with docking stations)
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*/
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drq_rman.rm_start = 0;
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#ifdef PC98
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drq_rman.rm_end = 3;
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#else
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drq_rman.rm_end = 7;
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#endif
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drq_rman.rm_type = RMAN_ARRAY;
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drq_rman.rm_descr = "DMA request lines";
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/* XXX drq 0 not available on some machines */
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if (rman_init(&drq_rman)
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|| rman_manage_region(&drq_rman,
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drq_rman.rm_start, drq_rman.rm_end))
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panic("nexus_probe drq_rman");
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/*
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* However, IO ports and Memory truely are global at this level,
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* as are APIC interrupts (however many IO APICS there turn out
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* to be on large systems..)
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*/
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port_rman.rm_start = 0;
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port_rman.rm_end = 0xffff;
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port_rman.rm_type = RMAN_ARRAY;
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port_rman.rm_descr = "I/O ports";
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if (rman_init(&port_rman)
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|| rman_manage_region(&port_rman, 0, 0xffff))
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panic("nexus_probe port_rman");
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mem_rman.rm_start = 0;
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mem_rman.rm_end = ~0u;
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mem_rman.rm_type = RMAN_ARRAY;
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mem_rman.rm_descr = "I/O memory addresses";
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if (rman_init(&mem_rman)
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|| rman_manage_region(&mem_rman, 0, ~0))
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panic("nexus_probe mem_rman");
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return 0;
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}
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static int
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nexus_attach(device_t dev)
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{
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bus_generic_probe(dev);
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bus_generic_attach(dev);
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return 0;
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}
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static int
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nexus_print_all_resources(device_t dev)
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{
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struct nexus_device *ndev = DEVTONX(dev);
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struct resource_list *rl = &ndev->nx_resources;
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int retval = 0;
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if (SLIST_FIRST(rl))
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retval += printf(" at");
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retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
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retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
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retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
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return retval;
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}
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static int
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nexus_print_child(device_t bus, device_t child)
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{
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int retval = 0;
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retval += bus_print_child_header(bus, child);
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retval += nexus_print_all_resources(child);
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retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
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return (retval);
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}
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static device_t
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nexus_add_child(device_t bus, int order, const char *name, int unit)
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{
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device_t child;
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struct nexus_device *ndev;
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ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
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if (!ndev)
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return(0);
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resource_list_init(&ndev->nx_resources);
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child = device_add_child_ordered(bus, order, name, unit);
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/* should we free this in nexus_child_detached? */
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device_set_ivars(child, ndev);
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return(child);
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}
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/*
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* Allocate a resource on behalf of child. NB: child is usually going to be a
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* child of one of our descendants, not a direct child of nexus0.
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* (Exceptions include npx.)
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*/
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static struct resource *
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nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct nexus_device *ndev = DEVTONX(child);
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struct resource *rv;
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struct resource_list_entry *rle;
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struct rman *rm;
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int needactivate = flags & RF_ACTIVE;
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/*
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* If this is an allocation of the "default" range for a given RID, and
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* we know what the resources for this device are (ie. they aren't maintained
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* by a child bus), then work out the start/end values.
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*/
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if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
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if (ndev == NULL)
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return(NULL);
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rle = resource_list_find(&ndev->nx_resources, type, *rid);
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if (rle == NULL)
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return(NULL);
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start = rle->start;
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end = rle->end;
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count = rle->count;
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}
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flags &= ~RF_ACTIVE;
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switch (type) {
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case SYS_RES_IRQ:
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rm = &irq_rman;
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break;
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case SYS_RES_DRQ:
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rm = &drq_rman;
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break;
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case SYS_RES_IOPORT:
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rm = &port_rman;
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break;
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case SYS_RES_MEMORY:
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rm = &mem_rman;
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break;
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default:
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return 0;
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}
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rv = rman_reserve_resource(rm, start, end, count, flags, child);
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if (rv == 0)
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return 0;
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if (type == SYS_RES_MEMORY) {
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rman_set_bustag(rv, I386_BUS_SPACE_MEM);
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} else if (type == SYS_RES_IOPORT) {
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rman_set_bustag(rv, I386_BUS_SPACE_IO);
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#ifndef PC98
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rman_set_bushandle(rv, rv->r_start);
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#endif
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}
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|
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#ifdef PC98
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if ((type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) &&
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i386_bus_space_handle_alloc(rv->r_bustag, rv->r_start, count,
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&rv->r_bushandle) != 0) {
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rman_release_resource(rv);
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return 0;
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}
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#endif
|
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|
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if (needactivate) {
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if (bus_activate_resource(child, type, *rid, rv)) {
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#ifdef PC98
|
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if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
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i386_bus_space_handle_free(rv->r_bustag,
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rv->r_bushandle, rv->r_bushandle->bsh_sz);
|
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}
|
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#endif
|
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rman_release_resource(rv);
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return 0;
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}
|
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}
|
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|
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return rv;
|
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}
|
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|
|
static int
|
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nexus_activate_resource(device_t bus, device_t child, int type, int rid,
|
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struct resource *r)
|
|
{
|
|
/*
|
|
* If this is a memory resource, map it into the kernel.
|
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*/
|
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if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) {
|
|
caddr_t vaddr = 0;
|
|
|
|
if (rman_get_end(r) < 1024 * 1024) {
|
|
/*
|
|
* The first 1Mb is mapped at KERNBASE.
|
|
*/
|
|
vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r));
|
|
} else {
|
|
u_int32_t paddr;
|
|
u_int32_t psize;
|
|
u_int32_t poffs;
|
|
|
|
paddr = rman_get_start(r);
|
|
psize = rman_get_size(r);
|
|
|
|
poffs = paddr - trunc_page(paddr);
|
|
vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
|
|
}
|
|
rman_set_virtual(r, vaddr);
|
|
#ifdef PC98
|
|
/* PC-98: the type of bus_space_handle_t is the structure. */
|
|
r->r_bushandle->bsh_base = (bus_addr_t) vaddr;
|
|
#else
|
|
/* IBM-PC: the type of bus_space_handle_t is u_int */
|
|
rman_set_bushandle(r, (bus_space_handle_t) vaddr);
|
|
#endif
|
|
}
|
|
return (rman_activate_resource(r));
|
|
}
|
|
|
|
static int
|
|
nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
/*
|
|
* If this is a memory resource, unmap it.
|
|
*/
|
|
if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) &&
|
|
(rman_get_end(r) >= 1024 * 1024)) {
|
|
u_int32_t psize;
|
|
|
|
psize = rman_get_size(r);
|
|
pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
|
|
}
|
|
|
|
return (rman_deactivate_resource(r));
|
|
}
|
|
|
|
static int
|
|
nexus_release_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
if (rman_get_flags(r) & RF_ACTIVE) {
|
|
int error = bus_deactivate_resource(child, type, rid, r);
|
|
if (error)
|
|
return error;
|
|
}
|
|
#ifdef PC98
|
|
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
|
|
i386_bus_space_handle_free(r->r_bustag, r->r_bushandle,
|
|
r->r_bushandle->bsh_sz);
|
|
}
|
|
#endif
|
|
return (rman_release_resource(r));
|
|
}
|
|
|
|
/*
|
|
* Currently this uses the really grody interface from kern/kern_intr.c
|
|
* (which really doesn't belong in kern/anything.c). Eventually, all of
|
|
* the code in kern_intr.c and machdep_intr.c should get moved here, since
|
|
* this is going to be the official interface.
|
|
*/
|
|
static int
|
|
nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
|
|
int flags, void (*ihand)(void *), void *arg, void **cookiep)
|
|
{
|
|
driver_t *driver;
|
|
int error;
|
|
|
|
/* somebody tried to setup an irq that failed to allocate! */
|
|
if (irq == NULL)
|
|
panic("nexus_setup_intr: NULL irq resource!");
|
|
|
|
*cookiep = 0;
|
|
if ((irq->r_flags & RF_SHAREABLE) == 0)
|
|
flags |= INTR_EXCL;
|
|
|
|
driver = device_get_driver(child);
|
|
|
|
/*
|
|
* We depend here on rman_activate_resource() being idempotent.
|
|
*/
|
|
error = rman_activate_resource(irq);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = inthand_add(device_get_nameunit(child), irq->r_start,
|
|
ihand, arg, flags, cookiep);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
|
|
{
|
|
return (inthand_remove(ih));
|
|
}
|
|
|
|
static int
|
|
nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
|
|
{
|
|
struct nexus_device *ndev = DEVTONX(child);
|
|
struct resource_list *rl = &ndev->nx_resources;
|
|
|
|
/* XXX this should return a success/failure indicator */
|
|
resource_list_add(rl, type, rid, start, start + count - 1, count);
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
|
|
{
|
|
struct nexus_device *ndev = DEVTONX(child);
|
|
struct resource_list *rl = &ndev->nx_resources;
|
|
struct resource_list_entry *rle;
|
|
|
|
rle = resource_list_find(rl, type, rid);
|
|
device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
|
|
type, rid, startp, countp, rle);
|
|
if (!rle)
|
|
return(ENOENT);
|
|
if (startp)
|
|
*startp = rle->start;
|
|
if (countp)
|
|
*countp = rle->count;
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
nexus_delete_resource(device_t dev, device_t child, int type, int rid)
|
|
{
|
|
struct nexus_device *ndev = DEVTONX(child);
|
|
struct resource_list *rl = &ndev->nx_resources;
|
|
|
|
resource_list_delete(rl, type, rid);
|
|
}
|
|
|
|
#ifdef DEV_ISA
|
|
/*
|
|
* Placeholder which claims PnP 'devices' which describe system
|
|
* resources.
|
|
*/
|
|
static struct isa_pnp_id sysresource_ids[] = {
|
|
{ 0x010cd041 /* PNP0c01 */, "System Memory" },
|
|
{ 0x020cd041 /* PNP0c02 */, "System Resource" },
|
|
{ 0 }
|
|
};
|
|
|
|
static int
|
|
sysresource_probe(device_t dev)
|
|
{
|
|
int result;
|
|
|
|
if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) {
|
|
device_quiet(dev);
|
|
}
|
|
return(result);
|
|
}
|
|
|
|
static int
|
|
sysresource_attach(device_t dev)
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
static device_method_t sysresource_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, sysresource_probe),
|
|
DEVMETHOD(device_attach, sysresource_attach),
|
|
DEVMETHOD(device_detach, bus_generic_detach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
DEVMETHOD(device_suspend, bus_generic_suspend),
|
|
DEVMETHOD(device_resume, bus_generic_resume),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t sysresource_driver = {
|
|
"sysresource",
|
|
sysresource_methods,
|
|
1, /* no softc */
|
|
};
|
|
|
|
static devclass_t sysresource_devclass;
|
|
|
|
DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0);
|
|
#endif /* DEV_ISA */
|