2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>.
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 ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
40 #include <sys/types.h>
43 #include <sys/ioctl.h>
44 #include <sys/ioccom.h>
45 #include <sys/cpuctl.h>
47 #include <machine/cpufunc.h>
48 #include <machine/specialreg.h>
50 #include "cpucontrol.h"
53 #define DEFAULT_UCODE_SIZE 2000 /* Size of update data if not specified. */
60 cpuctl_cpuid_args_t idargs = {
64 error = ioctl(fd, CPUCTL_CPUID, &idargs);
69 ((uint32_t *)vendor)[0] = idargs.data[1];
70 ((uint32_t *)vendor)[1] = idargs.data[3];
71 ((uint32_t *)vendor)[2] = idargs.data[2];
73 if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) != 0)
79 intel_update(const struct ucode_update_params *params)
82 const char *dev, *path;
83 const uint32_t *fw_image;
88 const intel_fw_header_t *fw_header;
89 const intel_cpu_signature_t *ext_table;
90 const intel_ext_header_t *ext_header;
91 uint32_t sig, signature, flags;
94 size_t ext_table_size;
96 size_t data_size, total_size;
97 cpuctl_msr_args_t msrargs = {
101 cpuctl_cpuid_args_t idargs = {
102 .level = 1, /* Signature. */
104 cpuctl_update_args_t args;
107 dev = params->dev_path;
108 path = params->fw_path;
109 devfd = params->devfd;
110 fw_image = params->fwimage;
118 error = ioctl(devfd, CPUCTL_WRMSR, &msrargs);
120 WARN(0, "ioctl(%s)", dev);
123 error = ioctl(devfd, CPUCTL_CPUID, &idargs);
125 WARN(0, "ioctl(%s)", dev);
128 signature = idargs.data[0];
129 msrargs.msr = MSR_IA32_PLATFORM_ID;
130 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
132 WARN(0, "ioctl(%s)", dev);
137 * MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50.
139 flags = 1 << ((msrargs.data >> 50) & 7);
140 msrargs.msr = MSR_BIOS_SIGN;
141 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
143 WARN(0, "ioctl(%s)", dev);
146 revision = msrargs.data >> 32; /* Revision in the high dword. */
147 WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.",
148 (signature >> 12) & 0x03, (signature >> 8) & 0x0f,
149 (signature >> 4) & 0x0f, (signature >> 0) & 0x0f);
151 * Open firmware image.
153 if (params->fwsize < sizeof(*fw_header)) {
154 WARNX(2, "file too short: %s", path);
158 fw_header = (const intel_fw_header_t *)fw_image;
159 if (fw_header->header_version != INTEL_HEADER_VERSION ||
160 fw_header->loader_revision != INTEL_LOADER_REVISION) {
161 WARNX(2, "%s is not a valid intel firmware: version mismatch",
166 * According to spec, if data_size == 0, then size of ucode = 2000.
168 if (fw_header->data_size == 0)
169 data_size = DEFAULT_UCODE_SIZE;
171 data_size = fw_header->data_size;
172 if (fw_header->total_size == 0)
173 total_size = data_size + sizeof(*fw_header);
175 total_size = fw_header->total_size;
176 if (total_size > params->fwsize) {
177 WARNX(2, "file too short: %s", path);
180 payload_size = data_size + sizeof(*fw_header);
183 * Check the primary checksum.
186 for (i = 0; i < (payload_size / sizeof(uint32_t)); i++)
187 sum += *((const uint32_t *)fw_image + i);
189 WARNX(2, "%s: update data checksum invalid", path);
194 * Check if there is an extended signature table.
196 ext_size = total_size - payload_size;
199 if (ext_size > (signed)sizeof(*ext_header)) {
200 ext_header = (const intel_ext_header_t *)
201 ((const char *)fw_image + payload_size);
202 ext_table = (const intel_cpu_signature_t *)(ext_header + 1);
205 * Check the extended table size.
207 ext_table_size = sizeof(*ext_header) +
208 ext_header->sig_count * sizeof(*ext_table);
209 if (ext_table_size + payload_size > total_size) {
210 WARNX(2, "%s: broken extended signature table", path);
215 * Check the extended table signature.
218 for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++)
219 sum += *((const uint32_t *)ext_header + i);
222 "%s: extended signature table checksum invalid",
230 fw_data = fw_header + 1; /* Pointer to the update data. */
233 * Check if the given image is ok for this cpu.
235 if (signature == fw_header->cpu_signature &&
236 (flags & fw_header->cpu_flags) != 0)
238 else if (have_ext_table != 0) {
239 for (i = 0; i < ext_header->sig_count; i++) {
240 sig = ext_table[i].cpu_signature;
241 if (signature == sig &&
242 (flags & ext_table[i].cpu_flags) != 0)
249 if (revision >= fw_header->revision) {
250 WARNX(1, "skipping %s of rev %#x: up to date",
251 path, fw_header->revision);
254 fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ",
255 path, dev, revision, fw_header->revision);
256 args.data = __DECONST(void *, fw_data);
257 args.size = data_size;
258 error = ioctl(devfd, CPUCTL_UPDATE, &args);
261 fprintf(stderr, "failed.\n");
266 fprintf(stderr, "done.\n");