The GICR_ISACTIVER0 characteristics are:
Activates the corresponding SGI or PPI. These registers are used when saving and restoring GIC state.
This register is part of the GIC Redistributor registers functional group.
This register is accessible as follows:
Security disabled | Secure | Non-secure |
---|---|---|
RW | RW | RW |
When affinity routing is not enabled for the Security state of an interrupt in GICR_ISACTIVER0, the corresponding bit is RAZ/WI and equivalent functionality is provided by GICD_ISACTIVER<n> with n=0.
This register only applies to SGIs (bits [15:0]) and PPIs (bits [31:16]). For SPIs, this functionality is provided by GICD_ISACTIVER<n>.
When GICD_CTLR.DS == 0, bits corresponding to Secure SGIs and PPIs are RAZ/WI to Non-secure accesses.
RW fields in this register reset to architecturally UNKNOWN values.
A copy of this register is provided for each Redistributor.
GICR_ISACTIVER0 is a 32-bit register.
The GICR_ISACTIVER0 bit assignments are:
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Set_active_bit<x>, bit [x], for x = 0 to 31 |
Adds the active state to interrupt number x. Reads and writes have the following behavior:
Set_active_bit<x> | Meaning |
---|---|
0 |
If read, indicates that the corresponding interrupt is not active, and is not active and pending. If written, has no effect. |
1 |
If read, indicates that the corresponding interrupt is active, or is active and pending. If written, activates the corresponding interrupt, if the interrupt is not already active. If the interrupt is already active, the write has no effect. After a write of 1 to this bit, a subsequent read of this bit returns 1. |
When this register has an architecturally-defined reset value, this field resets to a value that is architecturally UNKNOWN.
GICR_ISACTIVER0 can be accessed through its memory-mapped interface:
Component | Frame | Offset |
---|---|---|
GIC Redistributor | SGI_base | 0x0300 |
02/05/2017 15:43
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