Intel 81342 Developer's Manual page 241

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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 ) — I n t e l
T a b l e 1 1 6 . A T U C o m m a n d S u p p o r t
T L P T y p e
M R d
M R d L k
M W r
I O R d
I O W r
C f g R d 0
C f g W r 0
C f g R d 1
C f g W r 1
M s g
M s g D
C p l
C p l D
C p l L k
C p l D L k
a . R e q u e s t s w i t h t w o F m t [ 1 : 0 ] v a l u e s s h o w n c a n u s e e i t h e r 3 2 b ( t h e f i r s t v a l u e ) o r 6 4 b ( t h e s e c o n d v a l u e )
A d d r e s s i n g P a c k e t f o r m a t s .
b . A s a c o m p l e t e r , t h e A T U s t o r e s t h e m e s s a g e h e a d e r a n d p a y l o a d d i r e c t l y i n m e m o r y m a p p e d r e g i s t e r s . N o
i n t e r n a l b u s t r a f f i c o c c u r s .
c . A T U d o e s n o t g e n e r a t e l o c k r e q u e s t s a n d a n y C p l L k o r C p l D L k w o u l d b e a n u n e x p e c t e d c o m p l e t i o n .
I n b o u n d a n d o u t b o u n d A T U t r a n s a c t i o n s a r e b e s t d e s c r i b e d b y t h e d a t a f l o w s u s e d o n
t h e P C I E x p r e s s L i n k a n d t h e 8 1 3 4 1 a n d 8 1 3 4 2 i n t e r n a l b u s d u r i n g r e a d a n d w r i t e
o p e r a t i o n s . T h e f o l l o w i n g s e c t i o n s d e s c r i b e r e a d a n d w r i t e o p e r a t i o n s f o r i n b o u n d A T U
t r a n s a c t i o n s ( P C I E x p r e s s t o i n t e r n a l b u s ) a n d o u t b o u n d t r a n s a c t i o n s ( i n t e r n a l b u s t o
P C I E x p r e s s ) . A l l t r a n s a c t i o n s a r e f u l l s p l i t a n d t h e r e q u e s t s a n d c o m p l e t i o n s a r e
d e s c r i b e d s e p a r a t e l y .
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
®
8 1 3 4 1 a n d 8 1 3 4 2
a
F m t [ 1 : 0 ]
T y p e [ 4 : 0 ]
0 0
0 0 0 0 0
0 1
0 0
0 0 0 0 1
0 1
1 0
0 0 0 0 0
1 1
0 0
0 0 0 1 0
1 0
0 0 0 1 0
0 0
0 0 1 0 0
1 0
0 0 1 0 0
0 0
0 0 1 0 1
1 0
0 0 1 0 1
0 1
1 0 r
r
r
2
1
0
1 1
1 0 r
r
r
2
1
0
0 0
0 1 0 1 0
1 0
0 1 0 1 0
0 0
0 1 0 1 1
1 0
0 1 0 1 1
A l l e n c o d i n g s n o t s h o w n a b o v e a r e
r e s e r v e d
S u p p o r t e d a s
G e n e r a t e d a s
C o m p l e t e r
R e q u e s t e r
Y e s
Y e s
U n s u p p o r t e d
N o
R e q u e s t
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
U n s u p p o r t e d
Y e s
R e q u e s t
U n s u p p o r t e d
Y e s
R e q u e s t
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
U n e x p e c t e d
N o
C o m p l e t i o n
c
U n e x p e c t e d
N o
c
C o m p l e t i o n
M a l f o r m e d
N o
P a c k e t
®
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
V a l i d I n t e r n a l
B u s C o m m a n d
R e a d
N / A
W r i t e
R e a d
W r i t e
R e a d
W r i t e
N / A
N / A
b
W r i t e
b
W r i t e
C o m p l e t i o n
C o m p l e t i o n
N / A
N / A
N / A
D e v e l o p e r ' s M a n u a l
2 4 1

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