Serial RapidIO (SRIO) User's Guide

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Interrupt Conditions
Figure 52. LSU Interrupt Condition Status and Clear Registers
LSU Interrupt Condition Status Register (LSU_ICSR) (Address Offset 0260h)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
ICS31 ICS30 ICS29 ICS28 ICS27 ICS26 ICS25 ICS24 ICS23 ICS22 ICS21 ICS20 ICS19 ICS18 ICS17 ICS16
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ICS15 ICS14 ICS13 ICS12 ICS11 ICS10 ICS9 ICS8 ICS7 ICS6 ICS5 ICS4 ICS3 ICS2 ICS1 ICS0
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
LSU Interrupt Condition Clear Register (LSU_ICCR) (Address Offset 0268h)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
ICC31 ICC30 ICC29 ICC28 ICC27 ICC26 ICC25 ICC24 ICC23 ICC22 ICC21 ICC20 ICC19 ICC18 ICC17 ICC16
W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ICC15 ICC14 ICC13 ICC12 ICC11 ICC10 ICC9 ICC8 ICC7 ICC6 ICC5 ICC4 ICC3 ICC2 ICC1 ICC0
W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0
LEGEND: R = Read only; W = Write only; - n = Value after reset
Table 36. Interrupt Conditions Shown in LSU_ICSR and Cleared With LSU_ICCR
Bit Associated LSU Interrupt Condition
31 LSU4 Packet not sent due to unavailable outbound credit at given priority
30 LSU4 Retry Doorbell response received or Atomic test-and-swap was not allowed (semaphore in
use)
29 LSU4 Transaction was not sent due to DMA data transfer error
28 LSU4 Transaction timeout occurred
27 LSU4 Transaction was not sent due to unsupported transaction type or invalid field encoding
26 LSU4 Transaction was not sent due to Xoff condition
25 LSU4 Non-posted transaction received ERROR response, or error in response payload
24 LSU4 Transaction complete, No errors (posted/non-posted)
(1)
23 LSU3 Packet not sent due to unavailable outbound credit at given priority
22 LSU3 Retry Doorbell response received or Atomic test-and-swap was not allowed (semaphore in
use)
21 LSU3 Transaction was not sent due to DMA data transfer error
20 LSU3 Transaction timeout occurred
19 LSU3 Transaction was not sent due to unsupported transaction type or invalid field encoding
18 LSU3 Transaction was not sent due to Xoff condition
17 LSU3 Non-posted transaction received ERROR response, or error in response payload
16 LSU3 Transaction complete, No errors (posted/non-posted)
(1)
15 LSU2 Packet not sent due to unavailable outbound credit at given priority
14 LSU2 Retry Doorbell response received or Atomic test-and-swap was not allowed (semaphore in
use)
13 LSU2 Transaction was not sent due to DMA data transfer error
12 LSU2 Transaction timeout occurred
11 LSU2 Transaction was not sent due to unsupported transaction type or invalid field encoding
10 LSU2 Transaction was not sent due to Xoff condition
9 LSU2 Non-posted transaction received ERROR response, or error in response payload
8 LSU2 Transaction complete, No errors (posted/non-posted)
(1)
7 LSU1 Packet not sent due to unavailable outbound credit at given priority
(1)
Enable for this interrupt is ultimately controlled by the Interrupt Req register bit of LSU n_REG4. This allows enabling/disabling
on a per request basis. For optimum LSU performance, interrupt pacing should not be used on the LSU interrupts. Section 4.7
describes interrupt pacing.
90 Serial RapidIO (SRIO) SPRUE13A – September 2006
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