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powerpc: nexus code tidy-up
Make a pass at the various nexus implementations, fixing some very minor style issues, obsolete comments, etc. Update the top-level comment to be closer to other nexus implementations. The method declaration section has become unwieldy in many respects. Attempt to tame it by: - Using generated method typedefs - Grouping methods roughly by category, and then alphabetically. Reviewed by: jhb Differential Revision: https://reviews.freebsd.org/D38495
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@ -32,62 +32,62 @@
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* from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09
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*/
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/*
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* This code implements a `root nexus' for Power ISA 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 and I/O memory address space.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/endian.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/kdb.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 <sys/pcpu.h>
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#include <sys/rman.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/endian.h>
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#include <machine/intr_machdep.h>
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#include <machine/resource.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/bus.h>
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#include <machine/intr_machdep.h>
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#include <machine/resource.h>
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/*
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* The nexus handles root-level resource allocation requests and interrupt
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* mapping. All direct subdevices of nexus are attached by DEVICE_IDENTIFY().
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*/
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static struct rman intr_rman;
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static struct rman mem_rman;
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static device_probe_t nexus_probe;
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static device_attach_t nexus_attach;
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static bus_setup_intr_t nexus_setup_intr;
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static bus_teardown_intr_t nexus_teardown_intr;
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static bus_alloc_resource_t nexus_alloc_resource;
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static bus_activate_resource_t nexus_activate_resource;
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static bus_deactivate_resource_t nexus_deactivate_resource;
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static bus_adjust_resource_t nexus_adjust_resource;
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static bus_release_resource_t nexus_release_resource;
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static int nexus_map_resource(device_t bus, device_t child, int type,
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struct resource *r,
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struct resource_map_request *argsp,
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struct resource_map *map);
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static int nexus_unmap_resource(device_t bus, device_t child, int type,
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struct resource *r, struct resource_map *map);
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static device_probe_t nexus_probe;
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static device_attach_t nexus_attach;
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static bus_activate_resource_t nexus_activate_resource;
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static bus_adjust_resource_t nexus_adjust_resource;
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static bus_alloc_resource_t nexus_alloc_resource;
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static bus_deactivate_resource_t nexus_deactivate_resource;
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static bus_map_resource_t nexus_map_resource;
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static bus_release_resource_t nexus_release_resource;
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static bus_unmap_resource_t nexus_unmap_resource;
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static bus_space_tag_t nexus_get_bus_tag(device_t, device_t);
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#ifdef SMP
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static bus_bind_intr_t nexus_bind_intr;
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static bus_bind_intr_t nexus_bind_intr;
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#endif
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static bus_config_intr_t nexus_config_intr;
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static ofw_bus_map_intr_t nexus_ofw_map_intr;
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static bus_config_intr_t nexus_config_intr;
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static bus_setup_intr_t nexus_setup_intr;
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static bus_teardown_intr_t nexus_teardown_intr;
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static bus_get_bus_tag_t nexus_get_bus_tag;
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static ofw_bus_map_intr_t nexus_ofw_map_intr;
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static device_method_t nexus_methods[] = {
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/* Device interface */
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@ -96,19 +96,19 @@ static device_method_t nexus_methods[] = {
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/* Bus interface */
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DEVMETHOD(bus_add_child, bus_generic_add_child),
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DEVMETHOD(bus_alloc_resource, nexus_alloc_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_adjust_resource, nexus_adjust_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_alloc_resource, nexus_alloc_resource),
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DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
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DEVMETHOD(bus_map_resource, nexus_map_resource),
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DEVMETHOD(bus_release_resource, nexus_release_resource),
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DEVMETHOD(bus_unmap_resource, nexus_unmap_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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#ifdef SMP
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DEVMETHOD(bus_bind_intr, nexus_bind_intr),
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#endif
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DEVMETHOD(bus_config_intr, nexus_config_intr),
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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_get_bus_tag, nexus_get_bus_tag),
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/* ofw_bus interface */
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@ -222,7 +222,7 @@ nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
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{
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return (powerpc_config_intr(irq, trig, pol));
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}
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}
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static int
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nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
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