Visible to Intel only — GUID: izt1538697148755
Ixiasoft
Visible to Intel only — GUID: izt1538697148755
Ixiasoft
5.2.2. Base Address Registers
Parameter | Value | Description |
---|---|---|
BAR0 Type | Disabled 64-bit prefetchable memory 64-bit non-prefetchable memory 32-bit non-prefetchable memory |
If you select 64-bit prefetchable memory, 2 contiguous BARs are combined to form a 64-bit prefetchable BAR; you must set the higher numbered BAR to Disabled. Defining memory as prefetchable allows contiguous data to be fetched ahead. Prefetching memory is advantageous when the requestor may require more data from the same region than was originally requested. If you specify that a memory is prefetchable, it must have the following 2 attributes:
|
BAR1 Type | Disabled 32-bit non-prefetchable memory |
For a definition of prefetchable memory, refer to the BAR0 Type description. |
BAR2 Type | Disabled 64-bit prefetchable memory 64-bit non-prefetchable memory 32-bit non-prefetchable memory |
For a definition of prefetchable memory and a description of what happens when you select the 64-bit prefetchable memory option, refer to the BAR0 Type description. |
BAR3 Type | Disabled 32-bit non-prefetchable memory |
For a definition of prefetchable memory, refer to the BAR0 Type description. |
BAR4 Type | Disabled 64-bit prefetchable memory 64-bit non-prefetchable memory 32-bit non-prefetchable memory |
For a definition of prefetchable memory and a description of what happens when you select the 64-bit prefetchable memory option, refer to the BAR0 Type description. |
BAR5 Type | Disabled 32-bit non-prefetchable memory |
For a definition of prefetchable memory, refer to the BAR0 Type description. |
BARn Size | 128 Bytes - 16 EBytes |
Specifies the size of the address space accessible to BARn when BARn is enabled. n = 0, 1, 2, 3, 4 or 5 |
Expansion ROM | Disabled 4 KBytes - 12 bits 8 KBytes - 13 bits 16 KBytes - 14 bits 32 KBytes - 15 bits 64 KBytes - 16 bits 128 KBytes - 17 bits 256 KBytes - 18 bits 512 KBytes - 19 bits 1 MByte - 20 bits 2 MBytes - 21 bits 4 MBytes - 22 bits 8 MBytes - 23 bits 16 MBytes - 24 bits |
Specifies the size of the expansion ROM from 4 KBytes to 16 MBytes when enabled. |