2 * Copyright (c) 2011 Fabien Thomas <fabient@FreeBSD.org>.
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 ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
38 #include <sys/types.h>
41 #include <sys/ioctl.h>
42 #include <sys/ioccom.h>
43 #include <sys/cpuctl.h>
45 #include <machine/cpufunc.h>
46 #include <machine/specialreg.h>
48 #include "cpucontrol.h"
56 cpuctl_cpuid_args_t idargs = {
60 error = ioctl(fd, CPUCTL_CPUID, &idargs);
65 ((uint32_t *)vendor)[0] = idargs.data[1];
66 ((uint32_t *)vendor)[1] = idargs.data[3];
67 ((uint32_t *)vendor)[2] = idargs.data[2];
69 if (strncmp(vendor, CENTAUR_VENDOR_ID, sizeof(CENTAUR_VENDOR_ID)) != 0)
72 /* TODO: detect Nano CPU. */
77 via_update(const char *dev, const char *path)
85 via_fw_header_t *fw_header;
89 size_t data_size, total_size;
90 cpuctl_msr_args_t msrargs = {
91 .msr = MSR_IA32_PLATFORM_ID,
93 cpuctl_cpuid_args_t idargs = {
94 .level = 1, /* Signature. */
96 cpuctl_update_args_t args;
104 fw_image = MAP_FAILED;
105 devfd = open(dev, O_RDWR);
107 WARN(0, "could not open %s for writing", dev);
110 error = ioctl(devfd, CPUCTL_CPUID, &idargs);
112 WARN(0, "ioctl(%s)", dev);
115 signature = idargs.data[0];
116 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
118 WARN(0, "ioctl(%s)", dev);
123 * MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50.
125 msrargs.msr = MSR_BIOS_SIGN;
126 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
128 WARN(0, "ioctl(%s)", dev);
131 revision = msrargs.data >> 32; /* Revision in the high dword. */
132 WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.",
133 (signature >> 12) & 0x03, (signature >> 8) & 0x0f,
134 (signature >> 4) & 0x0f, (signature >> 0) & 0x0f);
136 * Open firmware image.
138 fd = open(path, O_RDONLY, 0);
140 WARN(0, "open(%s)", path);
143 error = fstat(fd, &st);
145 WARN(0, "fstat(%s)", path);
148 if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) {
149 WARNX(2, "file too short: %s", path);
154 * mmap the whole image.
156 fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ,
158 if (fw_image == MAP_FAILED) {
159 WARN(0, "mmap(%s)", path);
162 fw_header = (via_fw_header_t *)fw_image;
163 if (fw_header->signature != VIA_HEADER_SIGNATURE ||
164 fw_header->loader_revision != VIA_LOADER_REVISION) {
165 WARNX(2, "%s is not a valid via firmware: version mismatch",
169 data_size = fw_header->data_size;
170 total_size = fw_header->total_size;
171 if (total_size > (unsigned)st.st_size || st.st_size < 0) {
172 WARNX(2, "file too short: %s", path);
175 payload_size = data_size + sizeof(*fw_header);
178 * Check the primary checksum.
181 for (i = 0; i < (payload_size / sizeof(uint32_t)); i++)
182 sum += *((uint32_t *)fw_image + i);
184 WARNX(2, "%s: update data checksum invalid", path);
188 fw_data = fw_header + 1; /* Pointer to the update data. */
191 * Check if the given image is ok for this cpu.
193 if (signature != fw_header->cpu_signature)
196 if (fw_header->revision != 0 && revision >= fw_header->revision) {
197 WARNX(1, "skipping %s of rev %#x: up to date",
198 path, fw_header->revision);
201 fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ",
202 path, dev, revision, fw_header->revision);
204 args.size = data_size;
205 error = ioctl(devfd, CPUCTL_UPDATE, &args);
208 fprintf(stderr, "failed.\n");
213 fprintf(stderr, "done.\n");
216 if (fw_image != MAP_FAILED)
217 if (munmap(fw_image, st.st_size) != 0)
218 warn("munmap(%s)", path);