1 files changed, 54 insertions, 0 deletions
diff --git a/include/hw/nvram/chrp_nvram.h b/include/hw/nvram/chrp_nvram.h
new file mode 100644
index 0000000000..b4f5b2b104
--- /dev/null
+++ b/include/hw/nvram/chrp_nvram.h
@@ -0,0 +1,54 @@
+/*
+ * Common Hardware Reference Platform NVRAM functions.
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CHRP_NVRAM_H
+#define CHRP_NVRAM_H
+
+/* OpenBIOS NVRAM partition */
+typedef struct {
+    uint8_t signature;
+    uint8_t checksum;
+    uint16_t len;       /* Big endian, length divided by 16 */
+    char name[12];
+} ChrpNvramPartHdr;
+
+#define CHRP_NVPART_SYSTEM 0x70
+#define CHRP_NVPART_FREE 0x7f
+
+static inline void
+chrp_nvram_finish_partition(ChrpNvramPartHdr *header, uint32_t size)
+{
+    unsigned int i, sum;
+    uint8_t *tmpptr;
+
+    /* Length divided by 16 */
+    header->len = cpu_to_be16(size >> 4);
+
+    /* Checksum */
+    tmpptr = (uint8_t *)header;
+    sum = *tmpptr;
+    for (i = 0; i < 14; i++) {
+        sum += tmpptr[2 + i];
+        sum = (sum + ((sum & 0xff00) >> 8)) & 0xff;
+    }
+    header->checksum = sum & 0xff;
+}
+
+int chrp_nvram_create_system_partition(uint8_t *data, int min_len);
+int chrp_nvram_create_free_partition(uint8_t *data, int len);
+
+#endif