+/*
+ * Convert Intel microcode.dat into a single binary microcode.bin file
+ *
+ * Based on code by Kay Sievers <kay.sievers@vrfy.org>
+ * Changed to create a single file by Thomas Bächler <thomas@archlinux.org>
+ */
+
+
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+struct microcode_header_intel {
+ unsigned int hdrver;
+ unsigned int rev;
+ unsigned int date;
+ unsigned int sig;
+ unsigned int cksum;
+ unsigned int ldrver;
+ unsigned int pf;
+ unsigned int datasize;
+ unsigned int totalsize;
+ unsigned int reserved[3];
+};
+
+union mcbuf {
+ struct microcode_header_intel hdr;
+ unsigned int i[0];
+ char c[0];
+};
+
+int main(int argc, char *argv[])
+{
+ const char *filename = "/lib/firmware/microcode.dat";
+ FILE *f;
+ char line[LINE_MAX];
+ char buf[4000000];
+ union mcbuf *mc;
+ size_t bufsize, count, start;
+ int rc = EXIT_SUCCESS;
+
+ if (argv[1] != NULL)
+ filename = argv[1];
+
+ count = 0;
+ mc = (union mcbuf *) buf;
+ f = fopen(filename, "re");
+ if (f == NULL) {
+ printf("open %s: %m\n", filename);
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+
+ while (fgets(line, sizeof(line), f) != NULL) {
+ if (sscanf(line, "%x, %x, %x, %x",
+ &mc->i[count],
+ &mc->i[count + 1],
+ &mc->i[count + 2],
+ &mc->i[count + 3]) != 4)
+ continue;
+ count += 4;
+ }
+ fclose(f);
+
+ bufsize = count * sizeof(int);
+ printf("%s: %lu(%luk) bytes, %zu integers\n",
+ filename,
+ bufsize,
+ bufsize / 1024,
+ count);
+
+ if (bufsize < sizeof(struct microcode_header_intel))
+ goto out;
+
+ f = fopen("microcode.bin", "we");
+ if (f == NULL) {
+ printf("open microcode.bin: %m\n");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+
+ start = 0;
+ for (;;) {
+ size_t size;
+ unsigned int family, model, stepping, type;
+ unsigned int year, month, day;
+
+ mc = (union mcbuf *) &buf[start];
+
+ if (mc->hdr.totalsize)
+ size = mc->hdr.totalsize;
+ else
+ size = 2000 + sizeof(struct microcode_header_intel);
+
+ if (mc->hdr.ldrver != 1 || mc->hdr.hdrver != 1) {
+ printf("unknown version/format:\n");
+ rc = EXIT_FAILURE;
+ break;
+ }
+
+ /*
+ * 0- 3 stepping
+ * 4- 7 model
+ * 8-11 family
+ * 12-13 type
+ * 16-19 extended model
+ * 20-27 extended family
+ */
+ stepping = mc->hdr.sig & 0x0f;
+ model = (mc->hdr.sig >> 4) & 0x0f;
+ family = (mc->hdr.sig >> 8) & 0x0f;
+ type = (mc->hdr.sig >> 12) & 0x0f;
+ if (family == 0x06)
+ model += ((mc->hdr.sig >> 16) & 0x0f) << 4;
+ if (family == 0x0f)
+ family += (mc->hdr.sig >> 20) & 0xff;
+
+ year = mc->hdr.date & 0xffff;
+ month = mc->hdr.date >> 24;
+ day = (mc->hdr.date >> 16) & 0xff;
+
+ printf("\n");
+ printf("signature: 0x%02x (stepping %d, model %d, family %d, type %d)\n",
+ mc->hdr.sig, stepping, model, family, type);
+ printf("flags: 0x%02x\n", mc->hdr.pf);
+ printf("revision: 0x%02x\n", mc->hdr.rev);
+ printf("date: %04x-%02x-%02x\n", year, month, day);
+ printf("size: %zu\n", size);
+
+ if (fwrite(mc, size, 1, f) != 1) {
+ printf("write microcode.bin: %m\n");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+
+ start += size;
+ if (start >= bufsize)
+ break;
+ }
+ fclose(f);
+ printf("\n");
+out:
+ return rc;
+}
projects / packages / microcode-data-intel.git / commitdiff