=> R1 = &E3 (reason code)
R2 = 64b page block filled in by PreGrow routine
R3 = number of entries in page block
This service is broadcast to inform recipients that the pages specified are about to be swapped with different pages. DMA operations involving these pages should be suspended until Service_PagesSafe64 is received. This call must not be claimed.
See also the 32b version of this service.
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