QG5000X S L9TH Intel, QG5000X S L9TH Datasheet - Page 292

• Manufacturer Part Number: QG5000X S L9TH
• Manufacturer: Intel

Specifications of QG5000X S L9TH

• Lead Free Status / RoHS Status: Compliant

4.4.2.1
Table 4-8.
292
Access to SMM Space (Processor Only)
Accesses to SMM space are restricted to processors, inbound transactions are
prohibited. Inbound transactions to enabled SMM space are not allowed and
Intel 5000X chipset MCH will set Intel 5000P Chipset MCH.EXSMRAMC.E_SMERR bit.
The following table defines when a SMM range is enabled. All the enable bits:
G_SMRAME, H_SMRAM_EN, and TSEG_EN are located in the Intel 5000P Chipset
MCH.EXSMRC register.
The processor bus has a SMMEM# signal that qualifies the request asserted as having
access to a system management memory. The SMM register defines SMM space that
may fall in one of three ranges: legacy SMRAM, Extended SMRAM Space (TSEG), or
High SMRAM Space (H_SMM).
regions from processors.
SMM Memory Region Access Control from Processor
1. BRLC
2. Data access transaction other than BRLC
3. For access to TSEG region (address range between ESMMTOP - TSEG_SZ and ESMMTOP), Intel 5000P Chipset
4. It is a programming error if D_CLS and D_OPEN are both set to 1, Intel 5000P Chipset MCH’s
Table 4-7.
Notes:
Global Enable
G_SMRAME
MCH will route to identical system memory by definition (as TSEG is not enabled).
behavior is undefined. Intel 5000P Chipset MCH could master abort SMM access.
G_SMRAME
0
1
1
1
1
1
1
1
1
1
3
4
0
1
1
1
1
Enabled SMM Ranges
D_LCK
High SMM Enable
H_SMRAM_EN
x
0
0
0
0
x
1
1
1
1
X
0
0
1
1
D_CLS
x
x
0
0
1
1
0
1
0
1
Table 4-8
D_OPEN
TSEG Enable
TSEG_EN
x
0
0
1
0
1
x
0
x
0
X
0
1
0
1
Intel
defines the access control of SMM memory
®
5000X Chipset Memory Controller Hub (MCH) Datasheet
SMMEM#
Legacy SMM
x
0
1
x
1
x
0
0
1
1
Enabled?
Yes
Yes
No
No
No
Code Access to
SMM Memory
illegal settings
HIGH SMM
yes
yes
yes
yes
yes
no
no
no
no
Enabled?
Yes
Yes
No
No
No
1
System Address Map
no (legacy SMM)
no (legacy SMM)
Data Access to
SMM Memory
SMRAM Space
illegal settings
yes (H_SMM,
yes (H_SMM,
Extended
Enabled?
(TSEG)
TSEG)
TSEG)
yes
yes
yes
Yes
Yes
no
no
no
no
No
No
No
2