/*-
* Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>.
* 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 ``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 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 <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/ioccom.h>
#include <sys/cpuctl.h>
#include <machine/cpufunc.h>
#include <machine/specialreg.h>
#include "cpucontrol.h"
#include "amd.h"
int
amd_probe(int fd)
{
char vendor[13];
int error;
cpuctl_cpuid_args_t idargs = {
.level = 0,
};
error = ioctl(fd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl()");
return (1);
}
((uint32_t *)vendor)[0] = idargs.data[1];
((uint32_t *)vendor)[1] = idargs.data[3];
((uint32_t *)vendor)[2] = idargs.data[2];
vendor[12] = '\0';
if (strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
return (1);
return (0);
}
void
amd_update(const char *dev, const char *path)
{
int fd, devfd;
unsigned int i;
struct stat st;
uint32_t *fw_image;
amd_fw_header_t *fw_header;
uint32_t sum;
uint32_t signature;
uint32_t *fw_data;
size_t fw_size;
cpuctl_cpuid_args_t idargs = {
.level = 1, /* Request signature. */
};
cpuctl_update_args_t args;
int error;
assert(path);
assert(dev);
fd = -1;
fw_image = MAP_FAILED;
devfd = open(dev, O_RDWR);
if (devfd < 0) {
WARN(0, "could not open %s for writing", dev);
return;
}
error = ioctl(devfd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl()");
goto fail;
}
signature = idargs.data[0];
WARNX(2, "found cpu family %#x model %#x "
"stepping %#x extfamily %#x extmodel %#x.",
(signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
(signature >> 0) & 0x0f, (signature >> 20) & 0xff,
(signature >> 16) & 0x0f);
/*
* Open the firmware file.
*/
fd = open(path, O_RDONLY, 0);
if (fd < 0) {
WARN(0, "open(%s)", path);
goto fail;
}
error = fstat(fd, &st);
if (error != 0) {
WARN(0, "fstat(%s)", path);
goto fail;
}
if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) {
WARNX(2, "file too short: %s", path);
goto fail;
}
/*
* mmap the whole image.
*/
fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ,
MAP_PRIVATE, fd, 0);
if (fw_image == MAP_FAILED) {
WARN(0, "mmap(%s)", path);
goto fail;
}
fw_header = (amd_fw_header_t *)fw_image;
if ((fw_header->magic >> 8) != AMD_MAGIC) {
WARNX(2, "%s is not a valid amd firmware: version mismatch",
path);
goto fail;
}
fw_data = (uint32_t *)(fw_header + 1);
fw_size = (st.st_size - sizeof(*fw_header)) / sizeof(uint32_t);
/*
* Check the primary checksum.
*/
sum = 0;
for (i = 0; i < fw_size; i++)
sum += fw_data[i];
if (sum != fw_header->checksum) {
WARNX(2, "%s: update data checksum invalid", path);
goto fail;
}
if (signature == fw_header->signature) {
fprintf(stderr, "%s: updating cpu %s... ", path, dev);
args.data = fw_image;
args.size = st.st_size;
error = ioctl(devfd, CPUCTL_UPDATE, &args);
if (error < 0) {
fprintf(stderr, "failed.\n");
warn("ioctl()");
goto fail;
}
fprintf(stderr, "done.\n");
}
fail:
if (fd >= 0)
close(fd);
if (devfd >= 0)
close(devfd);
if (fw_image != MAP_FAILED)
if(munmap(fw_image, st.st_size) != 0)
warn("munmap(%s)", path);
return;
}
