Intel CONTROLLERS 413808 Developer's Manual page 433

Controllers in tper mode
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M e s s a g i n g U n i t — I n t e l
4 1 3 8 0 8 a n d 4 1 3 8 1 2
4 . 7 . 2 4
M e s s a g e U p p e r A d d r e s s R e g i s t e r - M e s s a g e _ U p p e r _ A d d r e s s
T h e M e s s a g e U p p e r A d d r e s s r e g i s t e r i s s e t d u r i n g s y s t e m i n i t i a l i z a t i o n w h e n s y s t e m
s o f t w a r e w i s h e s t o p l a c e t h e M S I a d d r e s s l o c a t i o n a b o v e t h e 4 G a d d r e s s b o u n d a r y .
W h e n t h i s r e g i s t e r i s s e t t o a n o n - z e r o v a l u e , t h e 4 1 3 8 x x g e n e r a t e s a d u a l a d d r e s s
c y c l e f o r t h e M S I w r i t e c o m m a n d a n d u s e s t h e c o n t e n t s o f t h i s r e g i s t e r a s t h e u p p e r
3 2 - b i t s o f t h a t a d d r e s s .
N o t e :
R e f e r t o t h e P e r i p h e r a l R e g i s t e r s C h a p t e r f o r t h e d e f a u l t i n t e r n a l b u s a d d r e s s . T h i s
r e g i s t e r i s p a r t o f t h e c o n f i g u r a t i o n s p a c e o f t h e A d d r e s s T r a n s l a t i o n U n i t t h a t i s s e t u p
a s a n e n d p o i n t .
T a b l e 2 8 9 . M e s s a g e U p p e r A d d r e s s R e g i s t e r - M e s s a g e _ U p p e r _ A d d r e s s
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 A 8 H
B i t
D e f a u l t
3 1 : 0 0
0 0 0 0 0 0 0 0 H M e s s a g e U p p e r A d d r e s s - U p p e r 3 2 b i t s o f a 6 4 - b i t P C I a d d r e s s . T h i s v a l u e i s s e t b y s y s t e m s o f t w a r e .
O c t o b e r 2 0 0 7
O r d e r N u m b e r : 3 1 7 8 0 5 - 0 0 1 U S
28
24
20
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
P C I C o n f i g u r a t i o n O f f s e t
A 8 H
16
12
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
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
®
I n t e l
4 1 3 8 0 8 a n d 4 1 3 8 1 2 I / O C o n t r o l l e r s i n T P E R M o d e
8
4
0
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
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
D e v e l o p e r ' s M a n u a l
4 3 3

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