Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
Flash Protected Range (BIOS_FPR4) – Offset 94
This register cannot be written when the FLOCKDN bit is set to 1.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31 | 0h | RW/L | Write Protection Enable (WPE) When set, this bit indicates that the Base and Limit fields in this register are valid and that writes and erases directed to addresses between them (inclusive) must be blocked by hardware. The base and limit fields are ignored when this bit is cleared. |
30:16 | 0h | RW/L | Protected Range Limit (PRL) This field corresponds to FLA address bits 26:12 and specifies the upper limit of the protected range. Address bits 11:0 are assumed to be FFFh for the limit comparison. Any address greater than the value programmed in this field is unaffected by this protected range. |
15 | 0h | RW/L | Read Protection Enable (RPE) When set, this bit indicates that the Base and Limit fields in this register are valid and that reads directed to addresses between them (inclusive) must be blocked by hardware. The base and limit fields are ignored when this bit is cleared. |
14:0 | 0h | RW/L | Protected Range Base (PRB) This field corresponds to FLA address bits 26:12 and specifies the lower base of the protected range. Address bits 11:0 are assumed to be 000h for the base comparison. Any address less than the value programmed in this field is unaffected by this protected range. |