
IBM3206K0424
Preliminary
IBM Processor for Network Resources
pnr25.chapt04.01
August 14, 2000
Interrupt and Status/Control (INTST)
Page 139 of 676
2.4: INTST Interrupt Source
This register indicates the source(s) of the interrupt(s) pending. It can also be used as a status register when
the bits are enabled. See
Note on Set/Clear Type Registers on page 93
for more details on addressing. Note
that bits in this register always reflect the state of the source register bit: Writing a value will have no effect.
Reserved bits will not take on the written value. The delay of running through a latch has been removed. For
the delayed interrupts feature, writing this register at the end of an interrupt handling routine will guarantee
that interrupt1 and interrupt2 (if enabled) will pulse off, allowing the logic to get ready for the next interrupt
DMA.
Length
32 bits
Type
Read Only
Address
XXXX 0410 and 14
Restrictions
None
Power on Reset value
X
’
00000000
’
I
P
C
I
B
R
R
R
G
D
R
R
R
R
R
R
P
P
C
E
C
R
S
R
L
R
I
R
V
R
P
S
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Bit(s)
Name
Description
31
INTST
A Control Processor related condition has occurred. A read of the INTST CPB Status and
INTST CPB Status Enable must be done for more information. See
INTST CPB Status on
page 142
and
INTST CPB Status Enable on page 144
.
30
PCORE
The PCORE entity has hardware interrupts that need handling.
29
COMET or PAKIT
The COMET or PAKIT entities have interrupts that need handling.
28
INTST GP Timer
The INTST General Purpose Timer Counter has reach the INTST General Purpose Timer
Compare value and caused an interrupt.
27
BCACH
The BCACH entity has interrupts that need handling.
26
RXQUE 2
The RXQUE entity has interrupts that need handling.
25
Reserved
Reserved
24
RXQUE 4
The RXQUE entity has interrupts that need handling.
23
GPDMA
The GPDMA entity has interrupts that need handling.
22
DMAQS
The DMAQS entity has interrupts that need handling.
21
REASM
The REASM entity has interrupts that need handling.
20
Reserved
Reserved
19
RXQUE 1
The RXQUE entity has interrupts that need handling.
18
Reserved
Reserved
17
Reserved
Reserved