Cross Reference: /illumos-gate/usr/src/uts/common/crypto/io/swrand.c

Lines Matching defs:block
62 #define	MEMBLOCKSIZE		4096	/* Size of memory block to read */
76 	caddr_t pmbuf;			/* buffer for memory block */
78 	int entperblock;		/* entropy bits per block read */
79 	hrtime_t last_diff;		/* previous time to process a block */
314  * Will block if not enough entropy was available and the call is blocking.
395 		 * of an n-bit block shall be compared with the previously
396 		 * generated block. Test shall fail if any two compared
405 			cmn_err(CE_WARN, "swrand: The value of 160-bit block "
505 		/* Hash a buffer centered on a block in the pool */
516 		/* XOR the hash result back into the block */
523 		/* Slide the hash buffer and repeat with next block */
559  *  - By measuring the time it takes to load and hash a block of memory
563  * memory is divided into blocks of fixed size.  A block of memory is
567  * "checksum" computed for the block.  If the single-bit checksum has not
569  * then the assumption is that at least one bit in the block has changed.
570  * The possible locations within the memory block of where the bit change
571  * occurred is used as a measure of entropy.  For example, if a block
575  * when a change is detected.  With a 4096 byte block size, a block
579  * hash a physical memory block (as described above).  The time measured
598 	 * The maximum entropy amount in bits per block of memory read is
662 	uint32_t block, oblock;
670 	 * block to read.
674 		/* If the pool is "full", stop after one block */
691 		/* Pick a memory block to read */
692 		block = oblock = srndpool[i] % entsrc->nblocks;
695 			if (block < pmem->ml_size / MEMBLOCKSIZE)
697 			block -= pmem->ml_size / MEMBLOCKSIZE;
702 		offset = pmem->ml_address + block * MEMBLOCKSIZE;
720 		 * memory block.  Load the page and compute the
721 		 * hash of the memory block.
768 		 * block and compare it against the previous
799 		 * If the memory block has changed, credit the pool with
818 physmem_parity_update(uint8_t *parity_vec, uint32_t block, int parity)
821 	if (parity == ((parity_vec[block >> 3] >> (block & 7)) & 1))
823 	parity_vec[block >> 3] ^= 1 << (block & 7);