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 */ 35