Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
DMA Protected Range (DPR) – Offset fed20330
DMA Protected Range
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 63:32 | 0h | RO | Reserved (RSVD) Reserved |
| 31:20 | 0h | RW/L | Top of DPR (TOPOFDPR) Top address + 1 of DPR. Bits 19:0 of the address reported here are 0x0_0000.This register has no function in HW, is RW for SW compatibility only. |
| 19:12 | 0h | RO | Reserved (RSVD_1) Reserved field |
| 11:4 | 0h | RW/L | DMA Protected Memory Size (DPR_SIZE) This is the size of memory, in MB, that will be protected from DMA accesses. A value of 0x00 in this field means no additional memory is protected. The maximum amount of memory that will be protected is 255 MB |
| 3:1 | 0h | RO | Reserved (RSVD_2) Reserved field |
| 0 | 0h | RW/L | Lock (LOCK) Bits 31:0 are locked down in this register when this bit is set. Note that the lock bit itself cannot be changed once it is written to a '1'. |