Arm
®
CoreLink™ GIC-600AE Generic Interrupt Controller
Technical Reference Manual
Document ID: 101206_0003_04_en
Issue: 04
Programmers model
Usage constraints
Only accessible by Secure accesses.
Bit descriptions
Figure 5-23: GICR_PWRR bit assignments
31 24 23 15 14 8 7 4 3 2 1
0
ReservedRDGORDGReserved
RDPD
RDAG
RDGPO
RDGPD
Table 5-27: GICR_PWRR bit descriptions
Bits Name Description Type
[31:24] - Reserved, RAZ -
[23:15] RDG RDGroup. This field indicates the number of this Redistributor. RO
[14:8] RDGO RDGroupOffset. This field indicates the identifier of the current core within the Redistributor. RO
[7:4] - Reserved, RAZ -
[3] RDGPO RDGroupPoweredOff. This bit indicates:
0 Redistributor is powered up and can be accessed
1 It is safe to power down the Redistributor
RO
[2] RDGPD RDGroupPowerDown. This bit indicates the intentional power state of the Redistributor:
0 Intend to power up
1 Intend to power down
The Redistributor has reached its intentional power state when RDGPD = RDGPO.
RO
[1] RDAG RDApplyGroup. Setting this bit to 1 applies the RDPD value to all Redistributors on the same Redistributor.
If the RDPD value cannot be applied to all cores in the group, then the GIC ignores this request.
WO
[0] RDPD RDPowerDown:
0 Redistributor is powered up and can be accessed
1 The core permits the Redistributor to be powered down
Writes to 1 are ignored if GICR_WAKER.ProcessorSleep != 1.
Writes are ignored if RDGPD != RDGPO and changing to not match RDGPD.
If all other cores in the Redistributor group have RDPD == 1, then setting this bit to 1 also sets RDGPD = 1.
RW
Related information
Redistributor power management on page 56
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