xref: /illumos-kvm-cmd/hw/firmware_abi.h (revision 68396ea9)
1 #ifndef FIRMWARE_ABI_H
2 #define FIRMWARE_ABI_H
3 
4 /* OpenBIOS NVRAM partition */
5 struct OpenBIOS_nvpart_v1 {
6     uint8_t signature;
7     uint8_t checksum;
8     uint16_t len; // BE, length divided by 16
9     char name[12];
10 };
11 
12 #define OPENBIOS_PART_SYSTEM 0x70
13 #define OPENBIOS_PART_FREE 0x7f
14 
15 static inline void
OpenBIOS_finish_partition(struct OpenBIOS_nvpart_v1 * header,uint32_t size)16 OpenBIOS_finish_partition(struct OpenBIOS_nvpart_v1 *header, uint32_t size)
17 {
18     unsigned int i, sum;
19     uint8_t *tmpptr;
20 
21     // Length divided by 16
22     header->len = cpu_to_be16(size >> 4);
23 
24     // Checksum
25     tmpptr = (uint8_t *)header;
26     sum = *tmpptr;
27     for (i = 0; i < 14; i++) {
28         sum += tmpptr[2 + i];
29         sum = (sum + ((sum & 0xff00) >> 8)) & 0xff;
30     }
31     header->checksum = sum & 0xff;
32 }
33 
34 static inline uint32_t
OpenBIOS_set_var(uint8_t * nvram,uint32_t addr,const char * str)35 OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const char *str)
36 {
37     uint32_t len;
38 
39     len = strlen(str) + 1;
40     memcpy(&nvram[addr], str, len);
41 
42     return addr + len;
43 }
44 
45 /* Sun IDPROM structure at the end of NVRAM */
46 /* from http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html */
47 struct Sun_nvram {
48     uint8_t type;       /* always 01 */
49     uint8_t machine_id; /* first byte of host id (machine type) */
50     uint8_t macaddr[6]; /* 6 byte ethernet address (first 3 bytes 08, 00, 20) */
51     uint8_t date[4];    /* date of manufacture */
52     uint8_t hostid[3];  /* remaining 3 bytes of host id (serial number) */
53     uint8_t checksum;   /* bitwise xor of previous bytes */
54 };
55 
56 static inline void
Sun_init_header(struct Sun_nvram * header,const uint8_t * macaddr,int machine_id)57 Sun_init_header(struct Sun_nvram *header, const uint8_t *macaddr, int machine_id)
58 {
59     uint8_t tmp, *tmpptr;
60     unsigned int i;
61 
62     header->type = 1;
63     header->machine_id = machine_id & 0xff;
64     memcpy(&header->macaddr, macaddr, 6);
65     /* Calculate checksum */
66     tmp = 0;
67     tmpptr = (uint8_t *)header;
68     for (i = 0; i < 15; i++)
69         tmp ^= tmpptr[i];
70 
71     header->checksum = tmp;
72 }
73 #endif /* FIRMWARE_ABI_H */
74