xref: /openbmc/qemu/include/hw/nvram/sun_nvram.h (revision 6bc56d31)
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
Sun_init_header(struct Sun_nvram * header,const uint8_t * macaddr,int machine_id)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