DHQ1ECCSECETS1SR1WH View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

DHQ1ECCSECETS1SR1WH

Intel® Quark SoC X1000

Intel 

Intel® Quark SoC X1000—Mapping Address Spaces

6.1.1.2

Figure 14.

DOS DRAM

The DOS DRAM is the memory space below 1 MByte. In general, accesses from a

processor targeting DOS DRAM target system DRAM. Exceptions are shown in

Figure 14.

Physical Address Space - DOS DRAM

4 Gbyte

MMIO

HMBOUND

Low DRAM

F Segment

E Segment

64 Kbyte (F0000h to F FFFFh)

64 Kbyte (E 0000h to E FFFFh)

VGA/CSEG

128 Kbyte (A0000h to BFFFFh)

6.1.1.3

1 Mbyte

DOS DRAM

Physical Address

Space

Processor writes to the 64 Kbyte (each) E and F segments (E0000h-EFFFFh and

F0000h-FFFFFh) always target DRAM. The HMISC2 register is used to direct CPU core

reads in these two segments to DRAM or the I/O fabric (MMIO).

CPU core accesses to the 128 Kbyte VGA/CSEG range (A0000h-BFFFFh) can target

DRAM or the MMIO space depending on the setting of HMISC2.ABSEG_IN_DRAM. When

targeting MMIO space, requests are sent to the PCIe* port if legacy VGA is enabled in

the PCIe controller.

Additional Mappings

There is one additional mapping available in the Host Bridge:

• SMM range

Figure 15 shows these mappings.

Intel® Quark SoC X1000

DS

92

October 2013

Document Number: 329676-001US

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