/*- * 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. * * from: src/sys/i386/i386/nexus.c,v 1.26.2.5 2000/11/16 09:30:57 nyan * JNPR: mainbus.c,v 1.2.4.1 2007/08/16 13:02:11 girish */ /* * This code implements a `root mainbus' for Intel Architecture * machines. The function of the root mainbus is to serve as an * attachment point for both processors and buses, and to manage * resources which are common to all of them. In particular, * this code implements the core resource managers for interrupt * requests, DMA requests (which rightfully should be a part of the * ISA code but it's easier to do it here for now), I/O port addresses, * and I/O memory address space. */ #include __FBSDID("$FreeBSD$"); #include "opt_cputype.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include static struct rman irq_rman, port_rman, mem_rman; static int mainbus_probe(device_t); static int mainbus_attach(device_t); static int mainbus_print_child(device_t, device_t); static device_t mainbus_add_child(device_t bus, u_int order, const char *name, int unit); static struct resource *mainbus_alloc_resource(device_t, device_t, int, int *, u_long, u_long, u_long, u_int); static int mainbus_activate_resource(device_t, device_t, int, int, struct resource *); static int mainbus_deactivate_resource(device_t, device_t, int, int, struct resource *); static int mainbus_release_resource(device_t, device_t, int, int, struct resource *); static int mainbus_setup_intr(device_t, device_t, struct resource *, int flags, driver_filter_t, void (*)(void *), void *, void **); static int mainbus_teardown_intr(device_t, device_t, struct resource *, void *); static device_method_t mainbus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, mainbus_probe), DEVMETHOD(device_attach, mainbus_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 */ DEVMETHOD(bus_print_child, mainbus_print_child), DEVMETHOD(bus_add_child, mainbus_add_child), DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), DEVMETHOD(bus_alloc_resource, mainbus_alloc_resource), DEVMETHOD(bus_release_resource, mainbus_release_resource), DEVMETHOD(bus_activate_resource, mainbus_activate_resource), DEVMETHOD(bus_deactivate_resource, mainbus_deactivate_resource), DEVMETHOD(bus_setup_intr, mainbus_setup_intr), DEVMETHOD(bus_teardown_intr, mainbus_teardown_intr), { 0, 0 } }; static driver_t mainbus_driver = { "mainbus", mainbus_methods, 1, /* no softc */ }; static devclass_t mainbus_devclass; DRIVER_MODULE(mainbus, root, mainbus_driver, mainbus_devclass, 0, 0); static int mainbus_probe(device_t dev) { #ifdef DEBUG_BRINGUP device_verbose(dev); /* print attach message */ #else device_quiet(dev); /* suppress attach message for neatness */ #endif irq_rman.rm_start = 0; irq_rman.rm_type = RMAN_ARRAY; irq_rman.rm_descr = "Interrupt request lines"; irq_rman.rm_end = 15; if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, irq_rman.rm_start, irq_rman.rm_end)) panic("mainbus_probe irq_rman"); /* * IO ports and Memory truely are global at this level, * as are APIC interrupts (however many IO APICS there turn out * to be on large systems..) */ port_rman.rm_start = 0; port_rman.rm_end = 0xffff; port_rman.rm_type = RMAN_ARRAY; port_rman.rm_descr = "I/O ports"; if (rman_init(&port_rman) || rman_manage_region(&port_rman, 0, 0xffff)) panic("mainbus_probe port_rman"); mem_rman.rm_start = 0; mem_rman.rm_end = ~0ul; mem_rman.rm_type = RMAN_ARRAY; mem_rman.rm_descr = "I/O memory addresses"; if (rman_init(&mem_rman) || rman_manage_region(&mem_rman, 0, ~0)) panic("mainbus_probe mem_rman"); return bus_generic_probe(dev); } static int mainbus_attach(device_t dev) { /* * First, deal with the children we know about already */ bus_generic_attach(dev); return 0; } static int mainbus_print_child(device_t bus, device_t child) { int retval = 0; retval += bus_print_child_header(bus, child); retval += printf(" on motherboard\n"); return (retval); } static device_t mainbus_add_child(device_t bus, u_int order, const char *name, int unit) { return device_add_child_ordered(bus, order, name, unit); } /* * Allocate a resource on behalf of child. NB: child is usually going to be a * child of one of our descendants, not a direct child of mainbus0. * (Exceptions include npx.) */ static struct resource * mainbus_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 resource *rv; struct rman *rm; int needactivate = flags & RF_ACTIVE; flags &= ~RF_ACTIVE; switch (type) { case SYS_RES_IRQ: rm = &irq_rman; break; case SYS_RES_DRQ: return 0; case SYS_RES_IOPORT: rm = &port_rman; break; case SYS_RES_MEMORY: rm = &mem_rman; break; default: return 0; } rv = rman_reserve_resource(rm, start, end, count, flags, child); if (rv == 0) { printf("mainbus_alloc_resource: no resource is available\n"); return 0; } if (type == SYS_RES_MEMORY) { rman_set_bustag(rv, MIPS_BUS_SPACE_MEM); } else if (type == SYS_RES_IOPORT) { rman_set_bustag(rv, MIPS_BUS_SPACE_IO); /* IBM-PC: the type of bus_space_handle_t is u_int */ rman_set_bushandle(rv, rman_get_start(rv)); } if (needactivate) { if (bus_activate_resource(child, type, *rid, rv)) { rman_release_resource(rv); return 0; } } return rv; } static int mainbus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { /* * If this is a memory resource, map it into the kernel. */ #ifdef CPU_CNMIPS uint64_t temp; #endif if (rman_get_bustag(r) == MIPS_BUS_SPACE_MEM) { caddr_t vaddr = 0; { u_int32_t paddr, psize, 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 CPU_CNMIPS temp = 0x0000000000000000; temp |= (uint32_t)vaddr; rman_set_bushandle(r, (bus_space_handle_t) temp); #else rman_set_bushandle(r, (bus_space_handle_t) vaddr); #endif } return (rman_activate_resource(r)); } static int mainbus_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) == MIPS_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 mainbus_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; } 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. * * Set up handler for external interrupt events. * Use CR_INT_ to select the proper interrupt * condition to dispatch on. */ static int mainbus_setup_intr(device_t bus, device_t child, struct resource *irq, int flags, driver_filter_t filter, void (*ihand)(void *), void *arg, void **cookiep) { panic("can never mainbus_setup_intr"); } static int mainbus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) { panic("can never mainbus_teardown_intr"); }