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SRIO Registers
5.45LSUn Control Register 4 (LSUn_REG4)
There are four of these registers, one for each LSU.
Figure 101. LSUn Control Register 4 (LSUn_REG4)
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OUTPORTID | PRIORITY | XAMBS | ID_SIZE | DESTID |
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LEGEND: R = Read only; |
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| 0 | ||
| DESTID |
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| Reserved | INTER |
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| RUPT |
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| _REQ |
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| RW- | |||
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| 0x00 |
LEGEND: R = Read only;
Table 75. LSUn Control Register 4 (LSUn_REG4) Field Descriptions
Bit | Field | Value | Description |
OUTPORTID |
| Not applicable for Rapid IO header. Indicates the output port number for the packet to be | |
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| transmitted from. Specified by the CPU along with NodeID. |
PRIORITY |
| RapidIO prio field specifying packet priority. Request packets should not be sent at a priority level of | |
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| 3 in order to avoid system deadlock. It is the responsibility of the software to assign the appropriate |
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| outgoing priority. |
XAMBS |
| RapidIO xambs field specifying extended address MSB | |
ID_SIZE |
| RapidIO tt field specifying 8 or 16bit DeviceIDs | |
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| 00b | 8 bit device Ids |
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| 01b | 16 bit device Ids |
DESTID |
| RapidIO destinationID field specifying target device | |
Reserved |
| Reserved | |
0 | INTERRUPT_RE |
| CPU controlled request bit used for interrupt generation. Typically used in conjunction with |
| Q |
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| 0b | Interrupt is not requested upon completion of command |
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| 1b | Interrupt is requested upon completion of command |
146 | Serial RapidIO (SRIO) | SPRU976 |