/* Initialize hash table. Should be locked. */
int
BCMINITFN(_nvram_init)(void *sih)
{
struct nvram_header *header;
int ret;
if (!(header = (struct nvram_header *) MALLOC(si_osh(sih), NVRAM_SPACE))) {
printf("nvram_init: out of memory\n");
return -12; /* -ENOMEM */
}
#if 0
if ((ret = _nvram_read(header)) == 0 &&
header->magic == NVRAM_MAGIC)
nvram_rehash(header);
#else
// nvram_rehash - may corrupt correct header
_nvram_read(header);
if (header->magic != NVRAM_MAGIC)
nvram_rehash(header);
#endif
MFREE(si_osh(sih), header, NVRAM_SPACE);
return ret;
}
/* Regenerate NVRAM. Should be locked. */
int _nvram_commit(struct nvram_header *header)
{
// char *init, *config, *refresh, *ncdl;
char *ptr, *end;
int i;
struct nvram_tuple *t;
struct nvram_header tmp;
uint8 crc;
/* Regenerate header */
header->magic = NVRAM_MAGIC;
header->crc_ver_init = NVRAM_DEFAULT << NVRAM_OPT_SHIFT | NVRAM_VERSION << NVRAM_VER_SHIFT;
/* Clear data area */
ptr = (char *)header + sizeof(struct nvram_header);
bzero(ptr, NVRAM_SPACE - sizeof(struct nvram_header));
/* Leave space for a double NUL at the end */
end = (char *)header + NVRAM_SPACE - 2;
/* Write out all tuples */
for (i = 0; i < ARRAYSIZE(nvram_hash); i++) {
for (t = nvram_hash[i]; t; t = t->next) {
if ((ptr + strlen(t->name) + 1 + strlen(t->value) + 1) > end)
break;
ptr += sprintf(ptr, "%s=%s", t->name, t->value) + 1;
}
}
/* End with a double NUL */
ptr += 2;
/* Set new length */
header->len = ROUNDUP(ptr - (char *)header, 4);
/* Little-endian CRC8 over the last 11 bytes of the header */
tmp.crc_ver_init = htol32(header->crc_ver_init);
tmp.config_refresh = htol32(header->config_refresh);
tmp.config_ncdl = htol32(header->config_ncdl);
crc = crc8((char *)&tmp + 12, sizeof(struct nvram_header) - 12, CRC8_INIT_VALUE);
/* Continue CRC8 over data bytes */
crc = crc8((char *)&header[1], header->len - sizeof(struct nvram_header), crc);
/* Set new CRC8 */
header->crc_ver_init |= crc;
/* Reinitialize hash table */
return nvram_rehash(header);
}
/* Initialize hash table. Should be locked. */
int _nvram_init(void)
{
struct nvram_header *header;
int ret;
if (!(header = (struct nvram_header *)MALLOC(NVRAM_SPACE))) {
printk(KERN_INFO "nvram_init: out of memory\n");
return -12; /* -ENOMEM */
}
if ((ret = _nvram_read(header)) == 0 && header->magic == NVRAM_MAGIC)
nvram_rehash(header);
MFREE(header, NVRAM_SPACE);
return ret;
}
/* XXX: not marking as RECLAIMTEXT allows this fucntion to be fc-sectioned out when not referenced
*/
int
BCMINITFN(_nvram_commit)(struct nvram_header *header)
{
char *ptr, *end;
int i;
struct nvram_tuple *t;
/* Regenerate header */
header->magic = NVRAM_MAGIC;
header->crc_ver_init = (NVRAM_VERSION << 8);
header->config_refresh = 0; /* for backward compatibility */
header->config_ncdl = 0; /* for backward compatibility */
/* Clear data area */
ptr = (char *) header + sizeof(struct nvram_header);
bzero(ptr, NVRAM_SPACE - sizeof(struct nvram_header));
/* Leave space for a double NUL at the end */
end = (char *) header + NVRAM_SPACE - 2;
/* Write out all tuples */
for (i = 0; i < ARRAYSIZE(nvram_hash); i++) {
for (t = nvram_hash[i]; t; t = t->next) {
if ((ptr + strlen(t->name) + 1 + strlen(t->value) + 1) > end)
break;
ptr += sprintf(ptr, "%s=%s", t->name, t->value) + 1;
}
}
/* End with a double NUL */
ptr += 2;
/* Set new length */
header->len = ROUNDUP(ptr - (char *) header, 4);
/* Set new CRC8 */
header->crc_ver_init |= nvram_calc_crc(header);
/* Reinitialize hash table */
return nvram_rehash(header);
}
