2 * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
34 #include <sys/socket.h>
36 #include <sys/module.h>
39 #include <machine/bus.h>
40 #include <machine/resource.h>
44 #include <vm/vm_param.h>
46 #include <machine/md_var.h>
47 #include <machine/pc/bios.h>
50 * System Management BIOS Reference Specification, v2.4 Final
51 * http://www.dmtf.org/standards/published_documents/DSP0134.pdf
56 struct resource * res;
59 struct smbios_eps * eps;
62 #define RES2EPS(res) ((struct smbios_eps *)rman_get_virtual(res))
63 #define ADDR2EPS(addr) ((struct smbios_eps *)BIOS_PADDRTOVADDR(addr))
65 static devclass_t smbios_devclass;
67 static void smbios_identify (driver_t *, device_t);
68 static int smbios_probe (device_t);
69 static int smbios_attach (device_t);
70 static int smbios_detach (device_t);
71 static int smbios_modevent (module_t, int, void *);
73 static int smbios_cksum (struct smbios_eps *);
76 smbios_identify (driver_t *driver, device_t parent)
83 if (!device_is_alive(parent))
86 addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
87 SMBIOS_STEP, SMBIOS_OFF);
90 length = ADDR2EPS(addr)->length;
93 u_int8_t major, minor;
95 major = ADDR2EPS(addr)->major_version;
96 minor = ADDR2EPS(addr)->minor_version;
98 /* SMBIOS v2.1 implementation might use 0x1e. */
99 if (length == 0x1e && major == 2 && minor == 1)
105 child = BUS_ADD_CHILD(parent, 5, "smbios", -1);
106 device_set_driver(child, driver);
107 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
108 device_set_desc(child, "System Management BIOS");
115 smbios_probe (device_t dev)
117 struct resource *res;
123 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
125 device_printf(dev, "Unable to allocate memory resource.\n");
130 if (smbios_cksum(RES2EPS(res))) {
131 device_printf(dev, "SMBIOS checksum failed.\n");
138 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
143 smbios_attach (device_t dev)
145 struct smbios_softc *sc;
148 sc = device_get_softc(dev);
153 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
155 if (sc->res == NULL) {
156 device_printf(dev, "Unable to allocate memory resource.\n");
160 sc->eps = RES2EPS(sc->res);
162 device_printf(dev, "Version: %u.%u",
163 sc->eps->major_version, sc->eps->minor_version);
164 if (bcd2bin(sc->eps->BCD_revision))
165 printf(", BCD Revision: %u.%u",
166 bcd2bin(sc->eps->BCD_revision >> 4),
167 bcd2bin(sc->eps->BCD_revision & 0x0f));
173 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
178 smbios_detach (device_t dev)
180 struct smbios_softc *sc;
182 sc = device_get_softc(dev);
185 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
191 smbios_modevent (mod, what, arg)
204 devclass_get_devices(smbios_devclass, &devs, &count);
205 for (i = 0; i < count; i++) {
206 device_delete_child(device_get_parent(devs[i]), devs[i]);
217 static device_method_t smbios_methods[] = {
218 /* Device interface */
219 DEVMETHOD(device_identify, smbios_identify),
220 DEVMETHOD(device_probe, smbios_probe),
221 DEVMETHOD(device_attach, smbios_attach),
222 DEVMETHOD(device_detach, smbios_detach),
226 static driver_t smbios_driver = {
229 sizeof(struct smbios_softc),
232 DRIVER_MODULE(smbios, nexus, smbios_driver, smbios_devclass, smbios_modevent, 0);
233 MODULE_VERSION(smbios, 1);
236 smbios_cksum (struct smbios_eps *e)
244 for (i = 0; i < e->length; i++) {