1 files changed, 30 insertions, 0 deletions
diff --git a/include/hw/nvram/chrp_nvram.h b/include/hw/nvram/chrp_nvram.h
index 18d19765d0..b4f5b2b104 100644
--- a/include/hw/nvram/chrp_nvram.h
+++ b/include/hw/nvram/chrp_nvram.h
@@ -18,6 +18,36 @@
 #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);