133 static __u64 jent_loop_shuffle(struct rand_data *ec,  in jent_loop_shuffle()  argument
146 	if (ec)  in jent_loop_shuffle()
147 		time ^= ec->data;  in jent_loop_shuffle()
202 static __u64 jent_fold_time(struct rand_data *ec, __u64 time,  in jent_fold_time()  argument
211 		jent_loop_shuffle(ec, MAX_FOLD_LOOP_BIT, MIN_FOLD_LOOP_BIT);  in jent_fold_time()
259 static unsigned int jent_memaccess(struct rand_data *ec, __u64 loop_cnt)  in jent_memaccess()  argument
267 		jent_loop_shuffle(ec, MAX_ACC_LOOP_BIT, MIN_ACC_LOOP_BIT);  in jent_memaccess()
269 	if (NULL == ec || NULL == ec->mem)  in jent_memaccess()
271 	wrap = ec->memblocksize * ec->memblocks;  in jent_memaccess()
280 	for (i = 0; i < (ec->memaccessloops + acc_loop_cnt); i++) {  in jent_memaccess()
281 		tmpval = ec->mem + ec->memlocation;  in jent_memaccess()
293 		ec->memlocation = ec->memlocation + ec->memblocksize - 1;  in jent_memaccess()
294 		ec->memlocation = ec->memlocation % wrap;  in jent_memaccess()
319 static void jent_stuck(struct rand_data *ec, __u64 current_delta)  in jent_stuck()  argument
321 	__s64 delta2 = ec->last_delta - current_delta;  in jent_stuck()
322 	__s64 delta3 = delta2 - ec->last_delta2;  in jent_stuck()
324 	ec->last_delta = current_delta;  in jent_stuck()
325 	ec->last_delta2 = delta2;  in jent_stuck()
328 		ec->stuck = 1;  in jent_stuck()
346 static __u64 jent_measure_jitter(struct rand_data *ec)  in jent_measure_jitter()  argument
353 	jent_memaccess(ec, 0);  in jent_measure_jitter()
360 	current_delta = time - ec->prev_time;  in jent_measure_jitter()
361 	ec->prev_time = time;  in jent_measure_jitter()
364 	jent_fold_time(ec, current_delta, &data, 0);  in jent_measure_jitter()
371 	jent_stuck(ec, current_delta);  in jent_measure_jitter()
475 static void jent_gen_entropy(struct rand_data *ec)  in jent_gen_entropy()  argument
480 	jent_measure_jitter(ec);  in jent_gen_entropy()
485 		if (ec->disable_unbias == 1)  in jent_gen_entropy()
486 			data = jent_measure_jitter(ec);  in jent_gen_entropy()
488 			data = jent_unbiased_bit(ec);  in jent_gen_entropy()
491 		if (ec->stuck) {  in jent_gen_entropy()
502 			ec->data ^= data;  in jent_gen_entropy()
503 			ec->stuck = 0;  in jent_gen_entropy()
517 		ec->data ^= data;  in jent_gen_entropy()
518 		ec->data ^= ((ec->data >> 63) & 1);  in jent_gen_entropy()
519 		ec->data ^= ((ec->data >> 60) & 1);  in jent_gen_entropy()
520 		ec->data ^= ((ec->data >> 55) & 1);  in jent_gen_entropy()
521 		ec->data ^= ((ec->data >> 30) & 1);  in jent_gen_entropy()
522 		ec->data ^= ((ec->data >> 27) & 1);  in jent_gen_entropy()
523 		ec->data ^= ((ec->data >> 22) & 1);  in jent_gen_entropy()
524 		ec->data = jent_rol64(ec->data, 1);  in jent_gen_entropy()
530 		if (++k >= (DATA_SIZE_BITS * ec->osr))  in jent_gen_entropy()
533 	if (ec->stir)  in jent_gen_entropy()
534 		jent_stir_pool(ec);  in jent_gen_entropy()
545 static void jent_fips_test(struct rand_data *ec)  in jent_fips_test()  argument
551 	if (!ec->old_data) {  in jent_fips_test()
552 		ec->old_data = ec->data;  in jent_fips_test()
553 		jent_gen_entropy(ec);  in jent_fips_test()
556 	if (ec->data == ec->old_data)  in jent_fips_test()
559 	ec->old_data = ec->data;  in jent_fips_test()
584 int jent_read_entropy(struct rand_data *ec, unsigned char *data,  in jent_read_entropy()  argument
589 	if (!ec)  in jent_read_entropy()
595 		jent_gen_entropy(ec);  in jent_read_entropy()
596 		jent_fips_test(ec);  in jent_read_entropy()
601 		jent_memcpy(p, &ec->data, tocopy);  in jent_read_entropy()