ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 162

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
3.7: DMAQS Interrupt Status
This register indicates the source(s) of the interrupt(s) pending.
See Note on Set/Clear Type Registers on page 93 for more details on addressing.
Length
Type
Address
Restrictions
Power on Value
DMA QUEUES (DMAQS)
Page 162 of 676
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Bit(s)
25
23
22
21
20
19
18
24
Zero Address in Source/Desti-
nation
Enq FIFO Thresh Exceeded
Enq FIFO Full
Enqueue Primitive
Sequence Error
Zero Length DMA Loaded
Error Enqueuing PCORE
Descriptor
Error Enqueuing CSKED
Descriptor
Error Enqueuing REALL
Descriptor
Function
26 bits
Read/Write
XXXX 6F0 and 6F4
None
X’00009200’
When set, a zero address was detected in the source or destination field of a DMA descrip-
tor. The remainder of the descriptor chain was skipped and an event was enqueued to the
DMA complete queue. This may or may not be an error condition. It is not an error if the get
buffer mode is being used and no buffer was available. In this case, the descriptor can be
retried or discarded by software.
When set, the DMA enqueue FIFO length threshold has been exceeded.
When set, the DMA enqueue FIFO is full and further enqueues will be held off. This bit is
hot and cannot be reset.
This bit is set when an improper sequence is detected for loading the DMAQS Enqueue
DMA Descriptor Primitive in 64 bit addressing mode.
A descriptor was loaded that had a DMA length equal to zero. This will not stop the DMA
engine, but it is technically a user error.
A descriptor was enqueued from PCORE with a chain length of zero.
A descriptor was enqueued from CSKED with a chain length of zero.
A descriptor was enqueued from REAALL with a chain length of zero.
9
8
7
6
Description
5
4
3
2
1
0
pnr25.chapt04.01
August 14, 2000
Preliminary