Current Path : /sys/powerpc/aim/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/powerpc/aim/nexus.c |
/*- * Copyright 1998 Massachusetts Institute of Technology * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby * granted, provided that both the above copyright notice and this * permission notice appear in all copies, that both the above * copyright notice and this permission notice appear in all * supporting documentation, and that the name of M.I.T. not be used * in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. M.I.T. makes * no representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied * warranty. * * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT * SHALL M.I.T. 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. */ /*- * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 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, 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. * * 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. * * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09 */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/powerpc/aim/nexus.c 229093 2011-12-31 14:12:12Z hselasky $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/module.h> #include <sys/bus.h> #include <sys/cons.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <dev/ofw/ofw_bus_subr.h> #include <dev/ofw/openfirm.h> #include <machine/bus.h> #include <machine/frame.h> #include <machine/intr_machdep.h> #include <machine/resource.h> #include <sys/rman.h> #include "ofw_bus_if.h" #include "pic_if.h" /* * The nexus (which is a pseudo-bus actually) iterates over the nodes that * exist in Open Firmware and adds them as devices to this bus so that drivers * can be attached to them. * * Maybe this code should get into dev/ofw to some extent, as some of it should * work for all Open Firmware based machines... */ static MALLOC_DEFINE(M_NEXUS, "nexus", "nexus device information"); enum nexus_ivars { NEXUS_IVAR_NODE, NEXUS_IVAR_NAME, NEXUS_IVAR_DEVICE_TYPE, NEXUS_IVAR_COMPATIBLE, }; struct nexus_devinfo { phandle_t ndi_node; /* Some common properties. */ const char *ndi_name; const char *ndi_device_type; const char *ndi_compatible; }; struct nexus_softc { struct rman sc_rman; }; /* * Device interface */ static int nexus_probe(device_t); static int nexus_attach(device_t); /* * Bus interface */ static device_t nexus_add_child(device_t, u_int, const char *, int); static void nexus_probe_nomatch(device_t, device_t); static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); static int nexus_write_ivar(device_t, device_t, int, uintptr_t); #ifdef SMP static int nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu); #endif static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol); static int nexus_setup_intr(device_t, device_t, struct resource *, int, driver_filter_t *, driver_intr_t *, void *, void **); static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, u_long, u_long, u_long, u_int); static int nexus_activate_resource(device_t, device_t, int, int, struct resource *); static int nexus_deactivate_resource(device_t, device_t, int, int, struct resource *); static int nexus_release_resource(device_t, device_t, int, int, struct resource *); /* * OFW bus interface. */ static phandle_t nexus_ofw_get_node(device_t, device_t); static const char *nexus_ofw_get_name(device_t, device_t); static const char *nexus_ofw_get_type(device_t, device_t); static const char *nexus_ofw_get_compat(device_t, device_t); /* * Local routines */ static device_t nexus_device_from_node(device_t, phandle_t); static device_method_t nexus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_probe), DEVMETHOD(device_attach, nexus_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), /* Bus interface. Resource management is business of the children... */ DEVMETHOD(bus_add_child, nexus_add_child), DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), DEVMETHOD(bus_probe_nomatch, nexus_probe_nomatch), DEVMETHOD(bus_read_ivar, nexus_read_ivar), DEVMETHOD(bus_write_ivar, nexus_write_ivar), DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), #ifdef SMP DEVMETHOD(bus_bind_intr, nexus_bind_intr), #endif DEVMETHOD(bus_config_intr, nexus_config_intr), DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), DEVMETHOD(bus_activate_resource, nexus_activate_resource), DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), DEVMETHOD(bus_release_resource, nexus_release_resource), /* OFW bus interface */ DEVMETHOD(ofw_bus_get_node, nexus_ofw_get_node), DEVMETHOD(ofw_bus_get_name, nexus_ofw_get_name), DEVMETHOD(ofw_bus_get_type, nexus_ofw_get_type), DEVMETHOD(ofw_bus_get_compat, nexus_ofw_get_compat), DEVMETHOD_END }; static driver_t nexus_driver = { "nexus", nexus_methods, sizeof(struct nexus_softc), }; static devclass_t nexus_devclass; DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); static int nexus_probe(device_t dev) { bus_generic_probe(dev); device_set_desc(dev, "Open Firmware Nexus device"); return (0); } static int nexus_attach(device_t dev) { phandle_t root; phandle_t child; struct nexus_softc *sc; u_long start, end; sc = device_get_softc(dev); start = 0; end = MAX_PICS*INTR_VECTORS - 1; sc->sc_rman.rm_start = start; sc->sc_rman.rm_end = end; sc->sc_rman.rm_type = RMAN_ARRAY; sc->sc_rman.rm_descr = "Interrupt request lines"; if (rman_init(&sc->sc_rman) || rman_manage_region(&sc->sc_rman, start, end)) panic("nexus_probe IRQ rman"); if ((root = OF_peer(0)) == 0) return (bus_generic_attach(dev)); /* * Now walk the OFW tree to locate top-level devices */ for (child = OF_child(root); child != 0; child = OF_peer(child)) { if (child == -1) panic("nexus_probe(): OF_child failed."); (void)nexus_device_from_node(dev, child); } return (bus_generic_attach(dev)); } static void nexus_probe_nomatch(device_t dev, device_t child) { char *name, *type; if (BUS_READ_IVAR(dev, child, NEXUS_IVAR_NAME, (uintptr_t *)&name) != 0 || BUS_READ_IVAR(dev, child, NEXUS_IVAR_DEVICE_TYPE, (uintptr_t *)&type) != 0) return; if (type == NULL) type = "(unknown)"; if (bootverbose) device_printf(dev, "<%s>, type %s (no driver attached)\n", name, type); } static device_t nexus_add_child(device_t dev, u_int order, const char *name, int unit) { device_t child; struct nexus_devinfo *dinfo; child = device_add_child_ordered(dev, order, name, unit); if (child == NULL) return (NULL); dinfo = malloc(sizeof(struct nexus_devinfo), M_NEXUS, M_NOWAIT|M_ZERO); if (dinfo == NULL) return (NULL); dinfo->ndi_node = -1; dinfo->ndi_name = name; device_set_ivars(child, dinfo); return (child); } static int nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(child)) == 0) return (ENOENT); switch (which) { case NEXUS_IVAR_NODE: *result = dinfo->ndi_node; break; case NEXUS_IVAR_NAME: *result = (uintptr_t)dinfo->ndi_name; break; case NEXUS_IVAR_DEVICE_TYPE: *result = (uintptr_t)dinfo->ndi_device_type; break; case NEXUS_IVAR_COMPATIBLE: *result = (uintptr_t)dinfo->ndi_compatible; break; default: return (ENOENT); } return 0; } static int nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(child)) == 0) return (ENOENT); switch (which) { case NEXUS_IVAR_NAME: return (EINVAL); /* Identified devices may want to set these */ case NEXUS_IVAR_NODE: dinfo->ndi_node = (phandle_t)value; break; case NEXUS_IVAR_DEVICE_TYPE: dinfo->ndi_device_type = (char *)value; break; default: return (ENOENT); } return 0; } static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, driver_filter_t *filter, driver_intr_t *ihand, void *arg, void **cookiep) { int error; /* somebody tried to setup an irq that failed to allocate! */ if (res == NULL) panic("nexus_setup_intr: NULL irq resource!"); *cookiep = 0; if ((rman_get_flags(res) & RF_SHAREABLE) == 0) flags |= INTR_EXCL; /* * We depend here on rman_activate_resource() being idempotent. */ error = rman_activate_resource(res); if (error) return (error); error = powerpc_setup_intr(device_get_nameunit(child), rman_get_start(res), filter, ihand, arg, flags, cookiep); return (error); } static int nexus_teardown_intr(device_t dev, device_t child, struct resource *res, void *cookie) { return (powerpc_teardown_intr(cookie)); } #ifdef SMP static int nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) { return (powerpc_bind_intr(rman_get_start(irq), cpu)); } #endif static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol) { return (powerpc_config_intr(irq, trig, pol)); } /* * Allocate resources at the behest of a child. This only handles interrupts, * since I/O resources are handled by child busses. */ static struct resource * nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, u_long start, u_long end, u_long count, u_int flags) { struct nexus_softc *sc; struct resource *rv; if (type != SYS_RES_IRQ) { device_printf(bus, "unknown resource request from %s\n", device_get_nameunit(child)); return (NULL); } if (count == 0 || start + count - 1 != end) { device_printf(bus, "invalid IRQ allocation from %s\n", device_get_nameunit(child)); return (NULL); } sc = device_get_softc(bus); rv = rman_reserve_resource(&sc->sc_rman, start, end, count, flags, child); if (rv == NULL) { device_printf(bus, "IRQ allocation failed for %s\n", device_get_nameunit(child)); } else rman_set_rid(rv, *rid); return (rv); } static int nexus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { /* Not much to be done yet... */ return (rman_activate_resource(res)); } static int nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { /* Not much to be done yet... */ return (rman_deactivate_resource(res)); } static int nexus_release_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { if (type != SYS_RES_IRQ) { device_printf(bus, "unknown resource request from %s\n", device_get_nameunit(child)); return (EINVAL); } return (rman_release_resource(res)); } static device_t nexus_device_from_node(device_t parent, phandle_t node) { device_t cdev; struct nexus_devinfo *dinfo; char *name, *type, *compatible; OF_getprop_alloc(node, "name", 1, (void **)&name); OF_getprop_alloc(node, "device_type", 1, (void **)&type); OF_getprop_alloc(node, "compatible", 1, (void **)&compatible); cdev = device_add_child(parent, NULL, -1); if (cdev != NULL) { dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK); dinfo->ndi_node = node; dinfo->ndi_name = name; dinfo->ndi_device_type = type; dinfo->ndi_compatible = compatible; device_set_ivars(cdev, dinfo); } else free(name, M_OFWPROP); return (cdev); } static const char * nexus_ofw_get_name(device_t bus, device_t dev) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(dev)) == NULL) return (NULL); return (dinfo->ndi_name); } static phandle_t nexus_ofw_get_node(device_t bus, device_t dev) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(dev)) == NULL) return (0); return (dinfo->ndi_node); } static const char * nexus_ofw_get_type(device_t bus, device_t dev) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(dev)) == NULL) return (NULL); return (dinfo->ndi_device_type); } static const char * nexus_ofw_get_compat(device_t bus, device_t dev) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(dev)) == NULL) return (NULL); return (dinfo->ndi_compatible); }