Allwinner A20 - Security System Register Description

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 219 / 812
Register Name
Offset
Description
SS_IV1
0x28
Security Initialization Vector 1
SS_IV2
0x2C
Security Initialization Vector 2
SS_IV3
0x30
Security Initialization Vector 3
SS_CNT0
0x34
Security Preload Counter 0
SS_CNT1
0x38
Security Preload Counter 1
SS_CNT2
0x3C
Security Preload Counter 2
SS_CNT3
0x40
Security Preload Counter 3
SS_FCSR
0x44
Security FIFO Control/ Status Register
SS_ICSR
0x48
Security Interrupt Control/ Status Register
SS_MD0
0x4C
SHA1/MD5 Message Digest 0/PRNG Data0
SS_MD1
0x50
SHA1/MD5 Message Digest 1/PRNG Data1
SS_MD2
0x54
SHA1/MD5 Message Digest 2/PRNG Data2
SS_MD3
0x58
SHA1/MD5 Message Digest 3/PRNG Data3
SS_MD4
0x5C
SHA1/MD5 Message Digest 4/PRNG Data4
SS_CTS_LEN
0x60
AES-CTS ciphertext length
SS_RXFIFO
0x200
RX FIFO input port
SS_TXFIFO
0x204
TX FIFO output port
1.16.4. Security System Register Description
1.16.4.1. SECURITY SYSTEM CONTROL REGISTER
Offset: 0x00
Register Name: SS_CTL
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:28
/
/
/
27:24
R/W
0
SKEY_SELECT
AES/DES/3DES key select
0: Select input SS_KEYx (Normal Mode)
1: Select SID_RKEYx from Security ID
2: Select SID_BKEYx from Security ID
3-10: Select internal Key n (n from 0 to 7)