Intel® Core™ Ultra 200H and 200U Series Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 844345 | 01/29/2025 | 001 | Public |
Local Memory Bar (LMEMBAR0_0_2_0_PCI) – Offset 18
The Local Memory Bar is used by S/W to access Gfx Gdie local memory.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31 | 0h | RW/V | 4 GB ADDRESS MASK (ADMSK4GB) This bit is either part of the Memory Base Address (R/W) or part of Address Mask (RO) depending on the value of PF_RESZ_CTRL.PFBARSIZE.RO and force to zero when PF_RESZ_CTRL.PFBARSIZE >= 4 GB |
| 30 | 0h | RW/V | 2 GB ADDRESS MASK (ADMSK2GB) This bit is either part of the Memory Base Address (R/W) or part of the Address Mask (RO) depending on the value of PF_RESZ_CTRL.PFBARSIZE.RO and force to zero when PF_RESZ_CTRL.PFBARSIZE >= 2GB |
| 29 | 0h | RW/V | 1 GB ADDRESS MASK (ADMSK1GB) This bit is either part of the Memory Base Address (R/W) or part of the Address Mask (RO) depending on the value of PF_RESZ_CTRL.PFBARSIZE.RO and force to zero when PF_RESZ_CTRL.PFBARSIZE >= 1GB |
| 28 | 0h | RW/V | 512MB ADDRESS MASK (ADMSK512) This bit is either part of the Memory Base Address (R/W) or part of the Address Mask (RO) depending on the value of PF_RESZ_CTRL.PFBARSIZE.RO and force to zero when PF_RESZ_CTRL.PFBARSIZE >= 512MB |
| 27 | 0h | RW/V | 256 MB ADDRESS MASK (ADMSK256) This bit is either part of the Memory Base Address (R/W) or part of the Address Mask (RO) depending on the value of PF_RESZ_CTRL.PFBARSIZE.RO and force to zero when PF_RESZ_CTRL.PFBARSIZE >= 256MB |
| 26:4 | 0h | RO | ADDRESS MASK (ADM) Hardwired to 0s to indicate at least 128MB address range. |
| 3 | 1h | RO | PREFETCHABLE MEMORY (PREFMEM) Hardwired to 1 to enable prefetching. |
| 2:1 | 2h | RO | MEMORY TYPE (MEMTYP) Hardwired to 2h to indicate 64 bit base address. |
| 0 | 0h | RO | MEMORY/IO SPACE (MIOS) Hardwired to 0 to indicate memory space. |