<s>
AMD	B-Device
Generic	I-Device
Encapsulated	I-Device
Software	I-Device
Architecture	I-Device
(	O
AGESA	B-Device
)	O
is	O
a	O
procedure	O
library	O
developed	O
by	O
Advanced	O
Micro	O
Devices	O
(	O
AMD	O
)	O
,	O
used	O
to	O
perform	O
the	O
Platform	B-Device
Initialization	I-Device
(	O
PI	O
)	O
on	O
mainboards	O
using	O
their	O
AMD64	B-Device
architecture	O
.	O
</s>
<s>
As	O
part	O
of	O
the	O
BIOS	B-Operating_System
of	O
such	O
mainboards	O
,	O
AGESA	B-Device
is	O
responsible	O
for	O
the	O
initialization	O
of	O
the	O
CPU	B-General_Concept
cores	I-General_Concept
,	O
chipset	O
,	O
main	O
memory	O
,	O
and	O
the	O
HyperTransport	B-Device
controller	O
.	O
</s>
<s>
AGESA	B-Device
was	O
open	O
sourced	O
in	O
early	O
2011	O
,	O
aiming	O
to	O
aid	O
in	O
the	O
development	O
of	O
coreboot	B-Device
,	O
a	O
project	O
attempting	O
to	O
replace	O
PC	O
's	O
proprietary	O
BIOS	B-Operating_System
.	O
</s>
<s>
However	O
,	O
such	O
releases	O
never	O
became	O
the	O
basis	O
for	O
the	O
development	O
of	O
coreboot	B-Device
beyond	O
AMD	O
's	O
family	O
15h	O
,	O
as	O
they	O
were	O
subsequently	O
halted	O
.	O
</s>
<s>
AGESA	B-Device
became	O
particularly	O
relevant	O
with	O
the	O
AM4	O
platform	O
,	O
which	O
AMD	O
designed	O
for	O
futureproofing	O
,	O
and	O
as	O
of	O
May	O
2019	O
has	O
served	O
as	O
the	O
base	O
for	O
three	O
different	O
generations	O
of	O
CPUs	O
based	O
on	O
its	O
Zen	O
architecture	O
.	O
</s>
<s>
For	O
each	O
of	O
these	O
generations	O
,	O
a	O
new	O
branch	O
of	O
AGESA	B-Device
code	O
has	O
been	O
released	O
.	O
</s>
<s>
AGESA	B-Device
versioning	O
often	O
runs	O
separately	O
for	O
each	O
of	O
these	O
three	O
releases	O
,	O
so	O
numbering	O
regressions	O
are	O
bound	O
to	O
happen	O
when	O
going	O
from	O
one	O
generation	O
to	O
the	O
next	O
.	O
</s>
<s>
In	O
December	O
2017	O
,	O
when	O
Summit	O
PI	O
reached	O
version	O
1.0.0.7	O
,	O
the	O
branch	O
was	O
renamed	O
to	O
"	O
Raven	O
PI	O
"	O
(	O
its	O
version	O
numbering	O
was	O
not	O
reset	O
)	O
,	O
and	O
it	O
was	O
released	O
as	O
the	O
first	O
version	O
of	O
AGESA	B-Device
to	O
support	O
Raven	O
Ridge	O
APUs	O
.	O
</s>
<s>
Then	O
in	O
March	O
2019	O
,	O
the	O
third	O
iteration	O
of	O
AGESA	B-Device
,	O
named	O
"	O
ComboAM4	O
PI	O
"	O
,	O
was	O
released	O
,	O
starting	O
at	O
version	O
0.0.7.0	O
,	O
introducing	O
support	O
for	O
Zen	O
2-based	O
processors	O
.	O
</s>
