Intel® Core™ Ultra 200S and 200HX Series Processors CFG & MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 835538 | 01/29/2025 | 001 | Public |
SOUTH_IOE_DECODE MCHBAR_IMPH (SOUTH_IOE_DECODE_0_0_0_MCHBAR_IMPH) – Offset 78b8
Device enable/disable register copy in IOC for Devices which are in SoC-South or in IOE die.
Allows for enabling/disabling devices and functions.
These devices are under the control of PMC.
IOC needs to know the status of these devices for Downstream source decode.
The table below the bit definitions describes the behavior of all combinations of transactions to devices controlled by this register.
All the bits in this register are Intel TXT Lockable.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:14 | 0h | RO | Reserved |
| 13 | 1h | RW/L | DMI3 decode Enable (DMI3_EN) 0: DMI3 is decode disabled |
| 12 | 1h | RW/L | GNA decode Enable (GNA_EN) 0: GNA is decode disabled |
| 11 | 1h | RW/L | PEG64 decode Enable (PEG64_EN) 0: PEG64 is decode disabled |
| 10 | 1h | RW/L | PEG63 decode Enable (PEG63_EN) 0: PEG63 is decode disabled |
| 9 | 1h | RW | SH SRAM IOE Enable (PMCSRAM_IOE_EN) 0: SH_SRAM_IOE is disabled |
| 8 | 1h | RW | PMC IOE Enable (PMCCORE_IOE_EN) 0: PMC_IOE is disabled |
| 7 | 1h | RW | IEH IOE Enable (IEH_IOE_EN) 0: IEH_IOE is disabled |
| 6 | 1h | RW | P2SB IOE Enable (P2SB_IOE_EN) 0: P2SB_IOE is disabled |
| 5 | 0h | RW | TSN1 Enable (TSN1_EN) 0: TSN1 is disabled |
| 4 | 0h | RW | TSN0 Enable (TSN0_EN) 0: TSN0 is disabled |
| 3 | 0h | RW/L | PEG62 Enable (PEG62_EN) 0: PEG62 is disabled |
| 2 | 1h | RW/L | PEG61 Enable (PEG61_EN) 0: PEG61 is disabled |
| 1 | 1h | RW/L | PEG60 Enable (PEG60_EN) 0: PEG60 is disabled |
| 0 | 1h | RW/L | PEG10 Enable (PEG10_EN) 0: PEG10 is disabled |