GHASHx

Galois Hash x (GCM mode only)

Name:: GHASHx
Offset:: 0x6C + x*0x04 [x=0..3]
Reset:: 0x00000000
Access:: PAC Write-Protection

Bit31	30	29	28	27	26	25	24
GHASH[31:24]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit23	22	21	20	19	18	17	16
GHASH[23:16]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit15	14	13	12	11	10	9	8
GHASH[15:8]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit7	6	5	4	3	2	1	0
GHASH[7:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0

Bits 31:0 – GHASH[31:0]: Galois Hash Value

Galois Hash Value

The four 32-bit Hash Word registers GHASHxcontain the GHASH value after GF128 multiplication in GCM mode. Writing a new key to KEYWORDx registers causes GHASHx to be initialized with zeroes. These registers can also be programmed.