Intel 81342 Developer's Manual page 208

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T a b l e 8 6 .
H S _ C N T R L - H o t - S w a p C o n t r o l / S t a t u s R e g i s t e r ( S h e e t 2 o f 2 )
R e g i s t e r O f f s e t
+ 0 E A H
B i t
D e f a u l t
P I E :
P e n d i n g I n s e r t i o n / E x t r a c t i o n
0 2
0 b
T h i s s t a t u s b i t i s s e t a n d c l e a r e d b y t h e 8 1 3 4 1 a n d 8 1 3 4 2 H o t - S w a p s t a t e M a c h i n e .
W h e n 1 b t h i s b i t i n d i c a t e s t h a t e i t h e r a n i n s e r t i o n o r a n e x t r a c t i o n i s i n p r o g r e s s ( e i t h e r I N S o r E X T
h a s a v a l u e o f 1 b o r I N S i s a r m e d ) .
E I M :
E N U M # I n t e r r u p t M a s k .
W h e n 0 b :
0 1
0 b
8 1 3 4 1 a n d 8 1 3 4 2 a s s e r t s P _ E N U M # w h e n a n i n s e r t i o n o r r e m o v a l e v e n t o c c u r s a s i n d i c a t e d b y t h e
s e t t i n g o f t h e I N S o r E X T b i t s o f t h i s r e g i s t e r .
W h e n 1 b :
8 1 3 4 1 a n d 8 1 3 4 2 d o e s n o t a s s e r t P _ E N U M # u n d e r a n y c i r c u m s t a n c e s .
D H A :
D e v i c e H i d i n g A r m e d :
W h e n 1 b :
W h e n
0 0
0 b
c o m p l e t e s a n y b u s c y c l e s p r e s e n t l y i n p r o c e s s a n d t h e n c e a s e t o i n i t i a t e o r r e s p o n d t o e i t h e r p r i m a r y
o r s e c o n d a r y b u s c y c l e s . W h e n L S T A T s u b s e q u e n t l y g o e s l o w , 8 1 3 4 1 a n d 8 1 3 4 2 r e s p o n d s n o r m a l l y
t o b u s c y c l e s .
W h e n 0 :
8 1 3 4 1 a n d 8 1 3 4 2 o p e r a t e s n o r m a l l y .
®
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
2 0 8
I n t e l
7
IOP
rw
rw
Attributes
PCI
rc
rc
Attributes
H S _ S M #
= 0 b , a n d L S T A T = 1 b ( S w i t c h o p e n ) a n d t h e L O O b i t = 1 b , 8 1 3 4 1 a n d 8 1 3 4 2
®
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 - X )
4
0
ro
ro
rw
ro
rw
rw
ro
ro
rw
ro
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
R W = R e a d / W r i t e
R O = R e a d O n l y
D e s c r i p t i o n
R T = R e a d / T o g g l e
R C = R e a d / C l e a r
S W = S R O M W r i t e
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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