da1b038af9
On some architectures, u_long isn't large enough for resource definitions. Particularly, powerpc and arm allow 36-bit (or larger) physical addresses, but type `long' is only 32-bit. This extends rman's resources to uintmax_t. With this change, any resource can feasibly be placed anywhere in physical memory (within the constraints of the driver). Why uintmax_t and not something machine dependent, or uint64_t? Though it's possible for uintmax_t to grow, it's highly unlikely it will become 128-bit on 32-bit architectures. 64-bit architectures should have plenty of RAM to absorb the increase on resource sizes if and when this occurs, and the number of resources on memory-constrained systems should be sufficiently small as to not pose a drastic overhead. That being said, uintmax_t was chosen for source clarity. If it's specified as uint64_t, all printf()-like calls would either need casts to uintmax_t, or be littered with PRI*64 macros. Casts to uintmax_t aren't horrible, but it would also bake into the API for resource_list_print_type() either a hidden assumption that entries get cast to uintmax_t for printing, or these calls would need the PRI*64 macros. Since source code is meant to be read more often than written, I chose the clearest path of simply using uintmax_t. Tested on a PowerPC p5020-based board, which places all device resources in 0xfxxxxxxxx, and has 8GB RAM. Regression tested on qemu-system-i386 Regression tested on qemu-system-mips (malta profile) Tested PAE and devinfo on virtualbox (live CD) Special thanks to bz for his testing on ARM. Reviewed By: bz, jhb (previous) Relnotes: Yes Sponsored by: Alex Perez/Inertial Computing Differential Revision: https://reviews.freebsd.org/D4544
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*-
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* Copyright (c) 2015 Marcel Moolenaar
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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, 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.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 <machine/resource.h>
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#include <sys/sbuf.h>
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#include <isa/isavar.h>
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#include <isa/pnpvar.h>
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#include <dev/proto/proto.h>
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static int proto_isa_probe(device_t dev);
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static int proto_isa_attach(device_t dev);
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static device_method_t proto_isa_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, proto_isa_probe),
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DEVMETHOD(device_attach, proto_isa_attach),
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DEVMETHOD(device_detach, proto_detach),
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DEVMETHOD_END
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};
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static driver_t proto_isa_driver = {
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proto_driver_name,
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proto_isa_methods,
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sizeof(struct proto_softc),
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};
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static char proto_isa_prefix[] = "isa";
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static char **proto_isa_devnames;
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static int
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proto_isa_probe(device_t dev)
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{
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struct sbuf *sb;
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struct resource *res;
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int rid, type;
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rid = 0;
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type = SYS_RES_IOPORT;
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res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
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if (res == NULL) {
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type = SYS_RES_MEMORY;
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res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
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}
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if (res == NULL)
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return (ENODEV);
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sb = sbuf_new_auto();
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sbuf_printf(sb, "%s:%#jx", proto_isa_prefix, rman_get_start(res));
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sbuf_finish(sb);
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device_set_desc_copy(dev, sbuf_data(sb));
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sbuf_delete(sb);
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bus_release_resource(dev, type, rid, res);
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return (proto_probe(dev, proto_isa_prefix, &proto_isa_devnames));
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}
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static int
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proto_isa_alloc(device_t dev, int type, int nrids)
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{
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struct resource *res;
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struct proto_softc *sc;
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int count, rid;
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sc = device_get_softc(dev);
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count = 0;
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for (rid = 0; rid < nrids; rid++) {
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res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
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if (res == NULL)
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break;
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proto_add_resource(sc, type, rid, res);
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count++;
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}
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if (type == SYS_RES_DRQ && count > 0)
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proto_add_resource(sc, PROTO_RES_BUSDMA, 0, NULL);
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return (count);
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}
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static int
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proto_isa_attach(device_t dev)
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{
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proto_isa_alloc(dev, SYS_RES_IRQ, ISA_NIRQ);
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proto_isa_alloc(dev, SYS_RES_DRQ, ISA_NDRQ);
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proto_isa_alloc(dev, SYS_RES_IOPORT, ISA_NPORT);
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proto_isa_alloc(dev, SYS_RES_MEMORY, ISA_NMEM);
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return (proto_attach(dev));
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}
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DRIVER_MODULE(proto, acpi, proto_isa_driver, proto_devclass, NULL, NULL);
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DRIVER_MODULE(proto, isa, proto_isa_driver, proto_devclass, NULL, NULL);
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