HP A2Y15AV Manual De Usuario

Datasheet, Volume 2

319

Processor Configuration Registers 

24

WO

0b

Uncore

Set Interrupt Remap Table Pointer (SIRTP) 
This field is valid only for implementations supporting interrupt-

remapping.
Software sets this field to set/update the interrupt remapping 

table pointer used by hardware. The interrupt remapping table 

pointer is specified through the Interrupt Remapping Table 

Address (IRTA_REG) register.
Hardware reports the status of the 'Set Interrupt Remap Table 

Pointer’ operation through the IRTPS field in the Global Status 

register.
The 'Set Interrupt Remap Table Pointer' operation must be 

performed before enabling or re-enabling (after disabling) 

interrupt-remapping hardware through the IRE field.
After a 'Set Interrupt Remap Table Pointer' operation, software 

must globally invalidate the interrupt entry cache. This is 

required to ensure hardware uses only the interrupt-remapping 

entries referenced by the new interrupt remap table pointer, and 

not any stale cached entries. 
While interrupt remapping is active, software may update the 

interrupt remapping table pointer through this field. However, to 

ensure valid in-flight interrupt requests are deterministically 

remapped, software must ensure that the structures referenced 

by the new interrupt remap table pointer are programmed to 

provide the same remapping results as the structures referenced 

by the previous interrupt remap table pointer. 
Clearing this bit has no effect. The value returned on a read of 

this field is undefined. 

23:0

RO

0h