Processor Configuration Registers
2.18.6
RTADDR_REG—Root-Entry Table Address Register
This register providing the base address of root-entry table.
B/D/F/Type:
Address Offset:
Reset Value:
Access:
0/0/0/GFXVTBAR
20–27h
0000000000000000h
RW
64 bits
Size:
BIOS Optimal Default
0000000000h
Reset
Value
RST/
PWR
Bit
Access
Description
63:39
RO
0h
0000000h
0h
Reserved (RSVD)
Root Table Address (RTA)
This field points to base of page aligned, 4 KB-sized root-entry
table in system memory. Hardware ignores and not implements
bits 63:HAW, where HAW is the host address width.
Software specifies the base address of the root-entry table
through this register, and programs it in hardware through the
SRTP field in the Global Command register.
38:12
11:0
RW
RO
Uncore
Reads of this register returns value that was last programmed to
it.
Reserved (RSVD)
272
Datasheet, Volume 2
INTEL [ INTEL ]
