1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2007 Bruce M. Simpson. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * Driver to swallow up memory ranges reserved by CFE platform firmware. 31 * CFE on Sentry5 doesn't specify reserved ranges, so this is not useful 32 * at the present time. 33 * TODO: Don't attach this off nexus. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/socket.h> 40 41 #include <sys/module.h> 42 #include <sys/bus.h> 43 44 #include <machine/bus.h> 45 #include <machine/resource.h> 46 #include <sys/rman.h> 47 48 #include <dev/cfe/cfe_api.h> 49 #include <dev/cfe/cfe_error.h> 50 51 #define MAX_CFE_RESERVATIONS 16 52 53 struct cferes_softc { 54 int rnum; 55 int rid[MAX_CFE_RESERVATIONS]; 56 struct resource *res[MAX_CFE_RESERVATIONS]; 57 }; 58 59 static int 60 cferes_probe(device_t dev) 61 { 62 63 return (BUS_PROBE_NOWILDCARD); 64 } 65 66 static int 67 cferes_attach(device_t dev) 68 { 69 70 return (0); 71 } 72 73 static void 74 cferes_identify(driver_t* driver, device_t parent) 75 { 76 device_t child; 77 int i; 78 struct resource *res; 79 int result; 80 int rid; 81 struct cferes_softc *sc; 82 uint64_t addr, len, type; 83 84 child = BUS_ADD_CHILD(parent, 100, "cferes", -1); 85 device_set_driver(child, driver); 86 sc = device_get_softc(child); 87 88 sc->rnum = 0; 89 for (i = 0; i < ~0U; i++) { 90 result = cfe_enummem(i, CFE_FLG_FULL_ARENA, &addr, &len, &type); 91 if (result < 0) 92 break; 93 if (type != CFE_MI_RESERVED) { 94 if (bootverbose) 95 printf("%s: skipping non reserved range 0x%0jx(%jd)\n", 96 device_getnameunit(child), 97 (uintmax_t)addr, (uintmax_t)len); 98 continue; 99 } 100 101 bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, addr, len); 102 rid = sc->rnum; 103 res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid, 0); 104 if (res == NULL) { 105 bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum); 106 continue; 107 } 108 sc->rid[sc->rnum] = rid; 109 sc->res[sc->rnum] = res; 110 111 sc->rnum++; 112 if (sc->rnum == MAX_CFE_RESERVATIONS) 113 break; 114 } 115 116 if (sc->rnum == 0) { 117 device_delete_child(parent, child); 118 return; 119 } 120 121 device_set_desc(child, "CFE reserved memory"); 122 } 123 124 static int 125 cferes_detach(device_t dev) 126 { 127 int i; 128 struct cferes_softc *sc = device_get_softc(dev); 129 130 for (i = 0; i < sc->rnum; i++) { 131 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i], 132 sc->res[i]); 133 } 134 135 return (0); 136 } 137 138 static device_method_t cferes_methods[] = { 139 /* Device interface */ 140 DEVMETHOD(device_identify, cferes_identify), 141 DEVMETHOD(device_probe, cferes_probe), 142 DEVMETHOD(device_attach, cferes_attach), 143 DEVMETHOD(device_detach, cferes_detach), 144 DEVMETHOD(device_shutdown, bus_generic_shutdown), 145 DEVMETHOD(device_suspend, bus_generic_suspend), 146 DEVMETHOD(device_resume, bus_generic_resume), 147 { 0, 0 } 148 }; 149 150 static driver_t cferes_driver = { 151 "cferes", 152 cferes_methods, 153 sizeof (struct cferes_softc) 154 }; 155 156 static devclass_t cferes_devclass; 157 158 DRIVER_MODULE(cfe, nexus, cferes_driver, cferes_devclass, 0, 0); 159