Справочник Пользователя для HP A2Y15AV

Datasheet, Volume 2

155

Processor Configuration Registers 

GMADR is the PCI aperture used by S/W to access tiled graphics surfaces in a linear 
fashion.

63:39

RW

0000000h

FLR, 

Uncore

Reserved for Memory Base Address (RSVDRW) 
Must be set to 0 since addressing above 512 GB is not supported.

38:29

RW

00000000

00b

FLR, 

Uncore

Memory Base Address (MBA) 
set by the OS, these bits correspond to address signals 38:29.

28

RW-L

0b

FLR, 

Uncore

512 MB Address Mask (ADMSK512) 
This Bit is either part of the Memory Base Address (RW) or part 

of the Address Mask (RO), depending on the value of MSAC[2:1].
See 

 for details.

27

RW-L

0b

FLR, 

Uncore

256 MB Address Mask (ADMSK256) 
This bit is either part of the Memory Base Address (RW) or part of 

the Address Mask (RO), depending on the value of MSAC[2:1]. 

See 

 for details.

26:4

RO

000000h

Uncore

Address Mask (ADM) 
Hardwired to 0s to indicate at least 128 MB address range.

3

RO

1b

Uncore

Prefetchable Memory (PREFMEM) 
Hardwired to 1 to enable prefetching.

2:1

RO

10b

Uncore

Memory Type (MEMTYP) 
00 = 32-bit address.
10 = 64-bit address

0

RO

0b

Uncore

Memory/IO Space (MIOS) 
Hardwired to 0 to indicate memory space.