| 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 */ |