<s>
Simple	B-General_Concept
Firmware	I-General_Concept
Interface	I-General_Concept
(	O
SFI	O
)	O
is	O
developed	O
by	O
Intel	O
Corporation	O
as	O
a	O
lightweight	O
method	O
for	O
firmware	O
to	O
export	O
static	O
tables	O
to	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
It	O
is	O
supported	O
by	O
Intel	O
's	O
hand-held	O
Moorestown	B-Device
platform	I-Device
.	O
</s>
<s>
SFI	O
tables	O
are	O
data	B-General_Concept
structures	I-General_Concept
in	O
memory	O
,	O
and	O
all	O
SFI	O
tables	O
share	O
a	O
common	O
table	O
header	B-General_Concept
format	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
finds	O
the	O
system	O
table	O
by	O
searching	O
16	O
byte	O
boundaries	O
between	O
physical	O
address	O
and	O
.	O
</s>
<s>
SFI	O
has	O
CPU	O
,	O
APIC	B-Device
,	O
Memory	O
Map	O
,	O
Idle	O
,	O
Frequency	O
,	O
M-Timer	O
,	O
M-RTC	O
,	O
OEMx	O
,	O
Wake	O
Vector	O
,	O
I²C	O
Device	O
,	O
and	O
a	O
SPI	O
Device	O
table	O
.	O
</s>
<s>
SFI	O
provides	O
access	O
to	O
a	O
standard	O
ACPI	B-Device
XSDT	O
(	O
Extended	B-General_Concept
System	I-General_Concept
Description	I-General_Concept
Table	I-General_Concept
)	O
.	O
</s>
<s>
XSDT	O
is	O
used	O
by	O
SFI	O
to	O
prevent	O
namespace	O
collision	O
between	O
SPI	O
and	O
ACPI	B-Device
.	O
</s>
<s>
It	O
can	O
access	O
standard	O
ACPI	B-Device
tables	O
such	O
as	O
PCI	O
Memory	O
Configuration	O
Table	O
(	O
MCFG	O
)	O
.	O
</s>
<s>
Linux	B-Operating_System
is	O
the	O
first	O
operating	B-General_Concept
system	I-General_Concept
with	O
an	O
SFI	O
implementation	O
.	O
</s>
<s>
Linux	B-Operating_System
kernel	I-Operating_System
5.6	O
marked	O
SFI	O
as	O
obsolete	O
.	O
</s>
<s>
SFI	O
support	O
was	O
removed	O
in	O
Linux	B-Operating_System
kernel	I-Operating_System
5.12	O
.	O
</s>
