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#ifndef OPENBIOS_FIRMWARE_ABI_H
#define OPENBIOS_FIRMWARE_ABI_H
/* OpenBIOS NVRAM partition */
struct OpenBIOS_nvpart_v1 {
uint8_t signature;
uint8_t checksum;
uint16_t len; // BE, length divided by 16
char name[12];
};
#define OPENBIOS_PART_SYSTEM 0x70
#define OPENBIOS_PART_FREE 0x7f
static inline void
OpenBIOS_finish_partition(struct OpenBIOS_nvpart_v1 *header, uint32_t size)
{
unsigned int i, sum;
uint8_t *tmpptr;
// Length divided by 16
header->len = cpu_to_be16(size >> 4);
// Checksum
tmpptr = (uint8_t *)header;
sum = *tmpptr;
for (i = 0; i < 14; i++) {
sum += tmpptr[2 + i];
sum = (sum + ((sum & 0xff00) >> 8)) & 0xff;
}
header->checksum = sum & 0xff;
}
static inline uint32_t
OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const char *str)
{
uint32_t len;
len = strlen(str) + 1;
memcpy(&nvram[addr], str, len);
return addr + len;
}
/* Sun IDPROM structure at the end of NVRAM */
/* from http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html */
struct Sun_nvram {
uint8_t type; /* always 01 */
uint8_t machine_id; /* first byte of host id (machine type) */
uint8_t macaddr[6]; /* 6 byte ethernet address (first 3 bytes 08, 00, 20) */
uint8_t date[4]; /* date of manufacture */
uint8_t hostid[3]; /* remaining 3 bytes of host id (serial number) */
uint8_t checksum; /* bitwise xor of previous bytes */
};
static inline void
Sun_init_header(struct Sun_nvram *header, const uint8_t *macaddr, int machine_id)
{
uint8_t tmp, *tmpptr;
unsigned int i;
header->type = 1;
header->machine_id = machine_id & 0xff;
memcpy(&header->macaddr, macaddr, 6);
memcpy(&header->hostid , &macaddr[3], 3);
/* Calculate checksum */
tmp = 0;
tmpptr = (uint8_t *)header;
for (i = 0; i < 15; i++)
tmp ^= tmpptr[i];
header->checksum = tmp;
}
#endif /* OPENBIOS_FIRMWARE_ABI_H */
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