include/hw/nvram/sun_nvram.h

   1 #ifndef SUN_NVRAM_H
   2 #define SUN_NVRAM_H
   3
   4 /* Sun IDPROM structure at the end of NVRAM */
   5 /* from http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html */
   6 struct Sun_nvram {
   7     uint8_t type;       /* always 01 */
   8     uint8_t machine_id; /* first byte of host id (machine type) */
   9     uint8_t macaddr[6]; /* 6 byte ethernet address (first 3 bytes 08, 00, 20) */
  10     uint8_t date[4];    /* date of manufacture */
  11     uint8_t hostid[3];  /* remaining 3 bytes of host id (serial number) */
  12     uint8_t checksum;   /* bitwise xor of previous bytes */
  13 };
  14
  15 static inline void
  16 Sun_init_header(struct Sun_nvram *header, const uint8_t *macaddr, int machine_id)
  17 {
  18     uint8_t tmp, *tmpptr;
  19     unsigned int i;
  20
  21     header->type = 1;
  22     header->machine_id = machine_id & 0xff;
  23     memcpy(&header->macaddr, macaddr, 6);
  24     memcpy(&header->hostid , &macaddr[3], 3);
  25
  26     /* Calculate checksum */
  27     tmp = 0;
  28     tmpptr = (uint8_t *)header;
  29     for (i = 0; i < 15; i++)
  30         tmp ^= tmpptr[i];
  31
  32     header->checksum = tmp;
  33 }
  34 #endif /* SUN_NVRAM_H */