void gen_rand_uuid(unsigned char *uuid_bin)
{
struct uuid uuid;
unsigned int *ptr = (unsigned int *)&uuid;
int i;
/* Set all fields randomly */
for (i = 0; i < sizeof(struct uuid) / sizeof(*ptr); i++)
*(ptr + i) = cpu_to_be32(rand());
clrsetbits_be16(&uuid.time_hi_and_version,
UUID_VERSION_MASK,
UUID_VERSION << UUID_VERSION_SHIFT);
clrsetbits_8(&uuid.clock_seq_hi_and_reserved,
UUID_VARIANT_MASK,
UUID_VARIANT << UUID_VARIANT_SHIFT);
memcpy(uuid_bin, &uuid, sizeof(struct uuid));
}
void clock_enter_limp(int lpdiv)
{
ccm_t *ccm = (ccm_t *)MMAP_CCM;
int i, j;
/* Check bounds of divider */
if (lpdiv < CLOCK_LPD_MIN)
lpdiv = CLOCK_LPD_MIN;
if (lpdiv > CLOCK_LPD_MAX)
lpdiv = CLOCK_LPD_MAX;
/* Round divider down to nearest power of two */
for (i = 0, j = lpdiv; j != 1; j >>= 1, i++) ;
/* Apply the divider to the system clock */
clrsetbits_be16(&ccm->cdr, 0x0f00, CCM_CDR_LPDIV(i));
/* Enable Limp Mode */
setbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
}