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3 . 1 6 . 3 6 I n b o u n d A T U U p p e r T r a n s l a t e V a l u e R e g i s t e r 2 - I A U T V R 2
T h e I n b o u n d A T U U p p e r T r a n s l a t e V a l u e R e g i s t e r 2 ( I A U T V R 2 ) i n c o n j u n c t i o n w i t h t h e
" I n b o u n d A T U T r a n s l a t e V a l u e R e g i s t e r 2 - I A T V R 2 " o n p a g e 3 2 7
t h e i n t e r n a l b u s a d d r e s s u s e d t o c o n v e r t P C I E x p r e s s L i n k a d d r e s s e s . T h e c o n v e r t e d
a d d r e s s i s d r i v e n o n t h e i n t e r n a l b u s a s a r e s u l t o f t h e i n b o u n d A T U a d d r e s s t r a n s l a t i o n .
T a b l e 1 7 0 . I n b o u n d A T U U p p e r T r a n s l a t e V a l u e R e g i s t e r 2 - I A U T V R 2
31
IOP
rv
rv
rv
Attributes
PCI
rv
rv
rv
Attributes
I n t e r n a l B u s A d d r e s s O f f s e t
+ 0 6 0 H
B i t
D e f a u l t
3 1 : 0 4
0 0 0 0 0 0 0 H R e s e r v e d
I n b o u n d U p p e r A T U T r a n s l a t i o n V a l u e 2 - T h i s v a l u e r e p r e s e n t s b i t s 3 5 t o 3 2 o f t h e i n t e r n a l b u s a d d r e s s
3 : 0
0 H
u s e d t o c o n v e r t t h e P C I a d d r e s s t o i n t e r n a l b u s a d d r e s s e s .
3 . 1 6 . 3 7 E x p a n s i o n R O M L i m i t R e g i s t e r - E R L R
T h e E x p a n s i o n R O M L i m i t R e g i s t e r ( E R L R ) d e f i n e s t h e b l o c k s i z e o f a d d r e s s e s t h e A T U
d e f i n e s a s E x p a n s i o n R O M a d d r e s s s p a c e . B l o c k s i z e i s p r o g r a m m e d b y w r i t i n g a v a l u e
i n t o t h e E R L R .
B i t s 3 1 t o 1 2 w i t h i n t h e E R L R h a v e a d i r e c t e f f e c t o n t h e E R B A R r e g i s t e r , b i t s 3 1 t o 1 2 ,
w i t h a o n e t o o n e c o r r e s p o n d e n c e . A v a l u e o f 0 i n a b i t w i t h i n t h e E R L R m a k e s t h e
c o r r e s p o n d i n g b i t w i t h i n t h e E R B A R a r e a d o n l y b i t w h i c h a l w a y s r e t u r n s 0 . A v a l u e o f 1
i n a b i t w i t h i n t h e E R L R m a k e s t h e c o r r e s p o n d i n g b i t w i t h i n t h e E R B A R r e a d / w r i t e f r o m
P C I .
T a b l e 1 7 1 . E x p a n s i o n R O M L i m i t R e g i s t e r - E R L R
31
IOP
rw
rw
rw
Attributes
PCI
rw
rw
rw
Attributes
I n t e r n a l B u s A d d r e s s O f f s e t
+ 0 6 4 H
B i t
D e f a u l t
E x p a n s i o n R O M L i m i t - B l o c k s i z e o f m e m o r y r e q u i r e d f o r E x p a n s i o n R O M t r a n s l a t i o n u n i t . D e f a u l t v a l u e
3 1 : 1 2
0 0 0 0 0 0 H
i s 0 , w h i c h i n d i c a t e s n o E x p a n s i o n R O M a d d r e s s s p a c e a n d a l l b i t s w i t h i n t h e E R B A R a r e r e a d o n l y w i t h a
v a l u e o f 0 .
1 1 : 0 0
0 0 0 H
R e s e r v e d
®
I n t e l
8 1 3 4 1 a n d 8 1 3 4 2 I / O P r o c e s s o r s
D e v e l o p e r ' s M a n u a l
3 2 8
I n t e l
28
24
20
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
28
24
20
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
®
8 1 3 4 1 a n d 8 1 3 4 2 — A d d r e s s T r a n s l a t i o n U n i t ( P C I E x p r e s s )
16
12
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
A t t r i b u t e L e g e n d :
R V = R e s e r v e d
P R = P r e s e r v e d
R S = R e a d / S e t
D e s c r i p t i o n
16
12
rw
rw
rw
rw
rw
rw
rw
rv
rv
rv
rw
rw
rw
rw
rw
rw
rw
rv
rv
rv
A t t r i b u t e L e g e n d :
R V = R e s e r v e d
P R = P r e s e r v e d
R S = R e a d / S e t
D e s c r i p t i o n
c o n t a i n b i t s 3 5 t o 8 o f
8
4
0
rv
rv
rv
rv
rv
rw
rw
rw
rw
rv
rv
rv
rv
rv
rw
rw
rw
rw
R W = R e a d / W r i t e
R C = R e a d C l e a r
R O = R e a d O n l y
N A = N o t A c c e s s i b l e
8
4
0
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
R W = R e a d / W r i t e
R C = R e a d C l e a r
R O = R e a d O n l y
N A = N o t A c c e s s i b l e
D e c e m b e r 2 0 0 7
O r d e r N u m b e r : 3 1 5 0 3 7 - 0 0 2 U S
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