/* 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;
}
/* 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;
}
char*
cfe_env_get(unsigned char *nv_buf, char* name)
{
int size;
unsigned char *buffer;
unsigned char *ptr;
unsigned char *envval;
unsigned int reclen;
unsigned int rectype;
int offset;
int flg;
size = NVRAM_SIZE;
buffer = &_nvdata[0];
ptr = buffer;
offset = 0;
/* Read the record type and length */
if (_nvram_read(nv_buf, ptr,offset,1) != 1) {
goto error;
}
while ((*ptr != ENV_TLV_TYPE_END) && (size > 1)) {
/* Adjust pointer for TLV type */
rectype = *(ptr);
offset++;
size--;
/*
* Read the length. It can be either 1 or 2 bytes
* depending on the code
*/
if (rectype & ENV_LENGTH_8BITS) {
/* Read the record type and length - 8 bits */
if (_nvram_read(nv_buf, ptr,offset,1) != 1) {
goto error;
}
reclen = *(ptr);
size--;
offset++;
}
else {
/* Read the record type and length - 16 bits, MSB first */
if (_nvram_read(nv_buf, ptr,offset,2) != 2) {
goto error;
}
reclen = (((unsigned int) *(ptr)) << 8) + (unsigned int) *(ptr+1);
size -= 2;
offset += 2;
}
if (reclen > size)
break; /* should not happen, bad NVRAM */
switch (rectype) {
case ENV_TLV_TYPE_ENV:
/* Read the TLV data */
if (_nvram_read(nv_buf, ptr,offset,reclen) != reclen)
goto error;
flg = *ptr++;
envval = (unsigned char *) _strnchr(ptr,'=',(reclen-1));
if (envval) {
*envval++ = '\0';
memcpy(_valuestr,envval,(reclen-1)-(envval-ptr));
_valuestr[(reclen-1)-(envval-ptr)] = '\0';
#if 0
printk(KERN_INFO "NVRAM:%s=%s\n", ptr, _valuestr);
#endif
if(!strcmp(ptr, name)){
return _valuestr;
}
if((strlen(ptr) > 1) && !strcmp(&ptr[1], name))
return _valuestr;
}
break;
default:
/* Unknown TLV type, skip it. */
break;
}
/*
* Advance to next TLV
*/
size -= (int)reclen;
offset += reclen;
/* Read the next record type */
ptr = buffer;
if (_nvram_read(nv_buf, ptr,offset,1) != 1)
goto error;
}
error:
return NULL;
}
