Allwinner A20 - Page 27

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 27 / 812
1.4.3.5. CPU1 CONTROL REGISTER(DEFAULT :0X00000000)
Offset: 0x84
Register Name: CPU1_CTRL_REG
Bit
Read/
Write
Default/Hex
Description
31:1
/
/
/
0
R/W
0x0
CPU1_CP15_WRITE_DISABLE.
Disable write access to certain CP15 registers.
0: enable
1: disable
1.4.3.6. CPU1 STATUS REGISTER(DEFAULT : 0X00000000)
Offset: 0x88
Register Name: CPU1_ STATUS
Bit
Read/
Write
Default/Hex
Description
31:3
/
/
/.
2
R
0x0
STANDBYWFI.
Indicates if the processor is in WFI standby mode:
0: Processor not in WFI standby mode.
1: Processor in WFI standby mode
1
R
0x0
STANDBYWFE.
Indicates if the processor is in the WFE standby mode:
0: Processor not in WFE standby mode
1: Processor in WFE standby mode
0
R
0x0
SMP_AMP
0: AMP mode
1: SMP mode
1.4.3.7. GENERAL CONTROL REGISTER(DEFAULT :0X00000020)
Offset: 0x184
Register Name: GENER_CTRL_REG
Bit
Read/
Write
Default/Hex
Description
31:9
/
/
/.
8
R/W
0x0
CFGSDISABLE.