Intel® Core™ Ultra Processors for H-series and U-series Platforms CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 795258 | 07/29/2024 | Public |
VT DMI PEG VC0 Range Base Address Register (VT IOMMU VC0 Range Base Address Register) – Offset 5410
This is the base address for the DMI/PEG VC0 configuration space. There is no physical memory within this window that can be addressed. The space reserved by this register does not alias to any PCI 2.3 compliant memory mapped space. On reset, the DMI/PEG VC0 configuration space is disabled and must be enabled by writing a 1 to VC0BAREN.
All the bits in this register are locked in LT mode.
BIOS programs this register after which the register cannot be altered.
The size of this BAR is 8kB.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 63:42 | 0h | RO | Reserved |
| 41:13 | 0h | RW/V | VT VC0 Base Address (VTVC0BAR) This field corresponds to bits 41 to 13 of the base address DMI/PEG VC0 configuration space. BIOS will program this register resulting in a base address for a block of contiguous memory address space. This register ensures that a naturally aligned space is allocated within the first 4TB of addressable memory space. System Software uses this base address to program the DMI/PEG VC0 register set. All the Bits in this register are locked in LT mode. |
| 12:1 | 0h | RO | Reserved |
| 0 | 0h | RW/L | VT VC0 BAR Enable (VTVC0BAREN) 0: VC0BAR is disabled and does not claim any memory |