278 lines
6.3 KiB
C
278 lines
6.3 KiB
C
/*-
|
|
* Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/resource.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/pmap.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/pc/bios.h>
|
|
|
|
/*
|
|
* System Management BIOS Reference Specification, v2.4 Final
|
|
* http://www.dmtf.org/standards/published_documents/DSP0134.pdf
|
|
*/
|
|
|
|
/*
|
|
* SMBIOS Entry Point Structure
|
|
*/
|
|
struct smbios_eps {
|
|
u_int8_t Anchor[4]; /* '_SM_' */
|
|
u_int8_t Checksum;
|
|
u_int8_t Length;
|
|
|
|
u_int8_t SMBIOS_Major;
|
|
u_int8_t SMBIOS_Minor;
|
|
u_int16_t Max_Size;
|
|
u_int8_t Revision;
|
|
u_int8_t Formatted_Area[5];
|
|
|
|
u_int8_t Intermediate_Anchor[5]; /* '_DMI_' */
|
|
u_int8_t Intermediate_Checksum;
|
|
|
|
u_int16_t Structure_Table_Length;
|
|
u_int32_t Structure_Table_Address;
|
|
u_int16_t Structure_Count;
|
|
|
|
u_int8_t SMBIOS_BCD_Revision;
|
|
} __packed;
|
|
|
|
struct smbios_softc {
|
|
device_t dev;
|
|
struct resource * res;
|
|
int rid;
|
|
|
|
struct smbios_eps * eps;
|
|
};
|
|
|
|
#define SMBIOS_START 0xf0000
|
|
#define SMBIOS_STEP 0x10
|
|
#define SMBIOS_OFF 0
|
|
#define SMBIOS_LEN 4
|
|
#define SMBIOS_SIG "_SM_"
|
|
|
|
#define RES2EPS(res) ((struct smbios_eps *)rman_get_virtual(res))
|
|
#define ADDR2EPS(addr) ((struct smbios_eps *)BIOS_PADDRTOVADDR(addr))
|
|
|
|
static devclass_t smbios_devclass;
|
|
|
|
static void smbios_identify (driver_t *, device_t);
|
|
static int smbios_probe (device_t);
|
|
static int smbios_attach (device_t);
|
|
static int smbios_detach (device_t);
|
|
static int smbios_modevent (module_t, int, void *);
|
|
|
|
static int smbios_cksum (struct smbios_eps *);
|
|
|
|
static void
|
|
smbios_identify (driver_t *driver, device_t parent)
|
|
{
|
|
device_t child;
|
|
u_int32_t addr;
|
|
int length;
|
|
int rid;
|
|
|
|
if (!device_is_alive(parent))
|
|
return;
|
|
|
|
addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
|
|
SMBIOS_STEP, SMBIOS_OFF);
|
|
if (addr != 0) {
|
|
rid = 0;
|
|
length = ADDR2EPS(addr)->Length;
|
|
|
|
if (length != 0x1f) {
|
|
u_int8_t major, minor;
|
|
|
|
major = ADDR2EPS(addr)->SMBIOS_Major;
|
|
minor = ADDR2EPS(addr)->SMBIOS_Minor;
|
|
|
|
/* SMBIOS v2.1 implementation might use 0x1e. */
|
|
if (length == 0x1e && major == 2 && minor == 1)
|
|
length = 0x1f;
|
|
else
|
|
return;
|
|
}
|
|
|
|
child = BUS_ADD_CHILD(parent, 0, "smbios", -1);
|
|
device_set_driver(child, driver);
|
|
bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
|
|
device_set_desc(child, "System Management BIOS");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int
|
|
smbios_probe (device_t dev)
|
|
{
|
|
struct resource *res;
|
|
int rid;
|
|
int error;
|
|
|
|
error = 0;
|
|
rid = 0;
|
|
res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
|
|
if (res == NULL) {
|
|
device_printf(dev, "Unable to allocate memory resource.\n");
|
|
error = ENOMEM;
|
|
goto bad;
|
|
}
|
|
|
|
if (smbios_cksum(RES2EPS(res))) {
|
|
device_printf(dev, "SMBIOS checksum failed.\n");
|
|
error = ENXIO;
|
|
goto bad;
|
|
}
|
|
|
|
bad:
|
|
if (res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
smbios_attach (device_t dev)
|
|
{
|
|
struct smbios_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
error = 0;
|
|
|
|
sc->dev = dev;
|
|
sc->rid = 0;
|
|
sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
|
|
RF_ACTIVE);
|
|
if (sc->res == NULL) {
|
|
device_printf(dev, "Unable to allocate memory resource.\n");
|
|
error = ENOMEM;
|
|
goto bad;
|
|
}
|
|
sc->eps = RES2EPS(sc->res);
|
|
|
|
device_printf(dev, "Version: %u.%u",
|
|
sc->eps->SMBIOS_Major, sc->eps->SMBIOS_Minor);
|
|
if (bcd2bin(sc->eps->SMBIOS_BCD_Revision))
|
|
printf(", BCD Revision: %u.%u",
|
|
bcd2bin(sc->eps->SMBIOS_BCD_Revision >> 4),
|
|
bcd2bin(sc->eps->SMBIOS_BCD_Revision & 0x0f));
|
|
printf("\n");
|
|
|
|
return (0);
|
|
bad:
|
|
if (sc->res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
smbios_detach (device_t dev)
|
|
{
|
|
struct smbios_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (sc->res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
smbios_modevent (mod, what, arg)
|
|
module_t mod;
|
|
int what;
|
|
void * arg;
|
|
{
|
|
device_t * devs;
|
|
int count;
|
|
int i;
|
|
|
|
switch (what) {
|
|
case MOD_LOAD:
|
|
break;
|
|
case MOD_UNLOAD:
|
|
devclass_get_devices(smbios_devclass, &devs, &count);
|
|
for (i = 0; i < count; i++) {
|
|
device_delete_child(device_get_parent(devs[i]), devs[i]);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t smbios_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_identify, smbios_identify),
|
|
DEVMETHOD(device_probe, smbios_probe),
|
|
DEVMETHOD(device_attach, smbios_attach),
|
|
DEVMETHOD(device_detach, smbios_detach),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t smbios_driver = {
|
|
"smbios",
|
|
smbios_methods,
|
|
sizeof(struct smbios_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(smbios, nexus, smbios_driver, smbios_devclass, smbios_modevent, 0);
|
|
MODULE_VERSION(smbios, 1);
|
|
|
|
static int
|
|
smbios_cksum (struct smbios_eps *e)
|
|
{
|
|
u_int8_t *ptr;
|
|
u_int8_t cksum;
|
|
int i;
|
|
|
|
ptr = (u_int8_t *)e;
|
|
cksum = 0;
|
|
for (i = 0; i < e->Length; i++) {
|
|
cksum += ptr[i];
|
|
}
|
|
|
|
return (cksum);
|
|
}
|