Intel G645 CM8062301262601 User Manual
Product codes
CM8062301262601
Datasheet, Volume 2
31
Processor Configuration Registers
The Remap window is inclusive of the Base and Limit addresses. In the decoder
A[19:0] of the Remap Base Address are assumed to be 0s. Similarly, A[19:0] of the
Remap Limit Address are assumed to be Fhs. Thus, the bottom of the defined memory
range will be aligned to a megabyte boundary and the top of the defined range will be
one less than a MB boundary.
A[19:0] of the Remap Base Address are assumed to be 0s. Similarly, A[19:0] of the
Remap Limit Address are assumed to be Fhs. Thus, the bottom of the defined memory
range will be aligned to a megabyte boundary and the top of the defined range will be
one less than a MB boundary.
Setting the Remap Base register to a value greater than that programmed into the
Remap Limit register disables the remap function.
Remap Limit register disables the remap function.
Software Responsibility and Restrictions
• BIOS is responsible for programming the REMAPBASE and REMAPLIMIT registers
based on the values in the TOLUD, TOM, and Intel ME stolen size registers.
• The amount of remapped memory defined by the REMAPBASE and REMAPLIMIT
registers must be equal to the amount of physical memory between the TOLUD
and the lower of either 4 GB or TOM minus the Intel ME stolen size.
and the lower of either 4 GB or TOM minus the Intel ME stolen size.
• Addresses of MMIO region must not overlap with any part of the Logical Address
Memory Remap range.
• When TOM is equal to TOLUD, remap is not needed and must be disabled by
programming REMAPBASE to a value greater than the value in the REMAPLIMIT
register.
register.
Interaction with other Overlapping Address Space
The following Memory Mapped IO address spaces are all logically addressed below 4 GB
where they do not overlap the logical address of the re-mapped memory region:
where they do not overlap the logical address of the re-mapped memory region:
GFXGTTstolen
At (TOLUD – GFXstolensize) to TOLUD
GFXstolen
At ((TOLUD – GFXstolensize) – GFXGTTstolensize) to (TOLUD –
GFXstolensize)
GFXstolensize)
TSEG
At ((TOLUD – GFXstolensize – GFXGTTstolensize) – TSEGSIZE) to
(TOLUD – GFXGTTstolensize – GFXstolensize)
(TOLUD – GFXGTTstolensize – GFXstolensize)
High BIOS
Reset vector just under 4GB boundary (Positive decode to DMI
occurs)
occurs)
XAPIC
At fixed address below 4 GB
Local APIC
At fixed address below 4 GB
MSI Interrupts
At fixed address below 4 GB
GMADR
64 bit BARs
GTTMMADR
64 bit BARs MBASE/MLIMIT
PXPEPBAR
39 bit BAR
DMIBAR
39 bit BAR
MCHBAR
39 bit BAR
TMBAR
64 bit BAR
PMBASE/PMLIMIT
64 bit BAR (using Upper PMBASE/PMLIMIT)
CHAPADR
64 bit BAR
GFXVTBAR
39 bit BARs
VTDPVC0BAR
39 bit BARs