2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/socket.h>
39 #include <sys/module.h>
42 #include <machine/bus.h>
43 #include <machine/resource.h>
47 #include <vm/vm_param.h>
49 #include <machine/md_var.h>
50 #if defined(__amd64__) || defined(__i386__)
51 #include <machine/pc/bios.h>
53 #include <dev/smbios/smbios.h>
56 * System Management BIOS Reference Specification, v2.4 Final
57 * http://www.dmtf.org/standards/published_documents/DSP0134.pdf
62 struct resource * res;
65 struct smbios_eps * eps;
68 #define RES2EPS(res) ((struct smbios_eps *)rman_get_virtual(res))
70 static devclass_t smbios_devclass;
72 static void smbios_identify (driver_t *, device_t);
73 static int smbios_probe (device_t);
74 static int smbios_attach (device_t);
75 static int smbios_detach (device_t);
76 static int smbios_modevent (module_t, int, void *);
78 static int smbios_cksum (struct smbios_eps *);
81 smbios_identify (driver_t *driver, device_t parent)
83 #ifdef ARCH_MAY_USE_EFI
84 struct uuid efi_smbios = EFI_TABLE_SMBIOS;
87 struct smbios_eps *eps;
93 if (!device_is_alive(parent))
96 #ifdef ARCH_MAY_USE_EFI
97 if (!efi_get_table(&efi_smbios, &addr_efi))
98 addr = (vm_paddr_t)addr_efi;
101 #if defined(__amd64__) || defined(__i386__)
103 addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
104 SMBIOS_STEP, SMBIOS_OFF);
108 eps = pmap_mapbios(addr, 0x1f);
110 length = eps->length;
112 if (length != 0x1f) {
113 u_int8_t major, minor;
115 major = eps->major_version;
116 minor = eps->minor_version;
118 /* SMBIOS v2.1 implementation might use 0x1e. */
119 if (length == 0x1e && major == 2 && minor == 1)
125 child = BUS_ADD_CHILD(parent, 5, "smbios", -1);
126 device_set_driver(child, driver);
127 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
128 device_set_desc(child, "System Management BIOS");
129 pmap_unmapbios((vm_offset_t)eps, 0x1f);
136 smbios_probe (device_t dev)
138 struct resource *res;
144 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
146 device_printf(dev, "Unable to allocate memory resource.\n");
151 if (smbios_cksum(RES2EPS(res))) {
152 device_printf(dev, "SMBIOS checksum failed.\n");
159 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
164 smbios_attach (device_t dev)
166 struct smbios_softc *sc;
169 sc = device_get_softc(dev);
174 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
176 if (sc->res == NULL) {
177 device_printf(dev, "Unable to allocate memory resource.\n");
181 sc->eps = RES2EPS(sc->res);
183 device_printf(dev, "Version: %u.%u",
184 sc->eps->major_version, sc->eps->minor_version);
185 if (bcd2bin(sc->eps->BCD_revision))
186 printf(", BCD Revision: %u.%u",
187 bcd2bin(sc->eps->BCD_revision >> 4),
188 bcd2bin(sc->eps->BCD_revision & 0x0f));
194 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
199 smbios_detach (device_t dev)
201 struct smbios_softc *sc;
203 sc = device_get_softc(dev);
206 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
212 smbios_modevent (mod, what, arg)
225 devclass_get_devices(smbios_devclass, &devs, &count);
226 for (i = 0; i < count; i++) {
227 device_delete_child(device_get_parent(devs[i]), devs[i]);
238 static device_method_t smbios_methods[] = {
239 /* Device interface */
240 DEVMETHOD(device_identify, smbios_identify),
241 DEVMETHOD(device_probe, smbios_probe),
242 DEVMETHOD(device_attach, smbios_attach),
243 DEVMETHOD(device_detach, smbios_detach),
247 static driver_t smbios_driver = {
250 sizeof(struct smbios_softc),
253 DRIVER_MODULE(smbios, nexus, smbios_driver, smbios_devclass, smbios_modevent, 0);
254 #ifdef ARCH_MAY_USE_EFI
255 MODULE_DEPEND(smbios, efirt, 1, 1, 1);
257 MODULE_VERSION(smbios, 1);
260 smbios_cksum (struct smbios_eps *e)
268 for (i = 0; i < e->length; i++) {