Altera Arria V Avalon-MM User Manual
Page 26
Parameter
Value
Description
Table size
[10:0]
System software reads this field to determine the MSI-X Table
size <n>, which is encoded as <n–1>. For example, a returned
value of 2047 indicates a table size of 2048. This field is read-
only. Legal range is 0–2047 (2
11
).
Address offset: 0x068[26:16]
Table Offset
[31:0]
Points to the base of the MSI-X Table. The lower 3 bits of the
table BAR indicator (BIR) are set to zero by software to form a
32-bit qword-aligned offset. This field is read-only.
Table BAR
Indicator
[2:0]
Specifies which one of a function’s BARs, located beginning at
0x10 in Configuration Space, is used to map the MSI-X table
into memory space. This field is read-only. Legal range is 0–5.
Pending Bit Array
(PBA) Offset
[31:0]
Used as an offset from the address contained in one of the
function’s Base Address registers to point to the base of the
MSI-X PBA. The lower 3 bits of the PBA BIR are set to zero by
software to form a 32-bit qword-aligned offset. This field is
read-only.
PBA BAR Indicator
[2:0]
Specifies the function Base Address registers, located
beginning at 0x10 in Configuration Space, that maps the MSI-
X PBA into memory space. This field is read-only. Legal range
is 0–5.
UG-01105_avmm
2014.12.15
MSI and MSI-X Capabilities
3-7
Parameter Settings
Altera Corporation