US 12,277,070 B2
Cache line subscription
Eric Ola Harald Liljedahl, Stockholm (SE); and Jatin Bhartia, Cambridge (GB)
Assigned to Arm Limited, Cambridge (GB)
Filed by Arm Limited, Cambridge (GB)
Filed on Apr. 5, 2023, as Appl. No. 18/295,866.
Prior Publication US 2024/0338323 A1, Oct. 10, 2024
Int. Cl. G06F 12/12 (2016.01); G06F 12/0891 (2016.01)
CPC G06F 12/12 (2013.01) [G06F 12/0891 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An apparatus comprising:
subscription storage circuitry configured to store a subscription indicator indicating a subscription to a region of memory;
control circuitry configured to generate, in response to an invalidation in a cache of a cache line holding a data block corresponding to the region of memory for which the subscription is indicated, a re-fetch request specifying the data block after a delay, and to cause the data block to be stored in the cache; and
decoding circuitry configured to decode a subscription instruction indicating the region of memory, wherein
in response to the subscription instruction, the decoding circuitry is configured to generate control signals which cause the subscription indicator to be stored in the subscription storage circuitry.