This function is used to get the device status.
Prototype
XStatus XPm_GetNodeStatus(const u32 DeviceId, XPm_NodeStatus *const NodeStatus);
Parameters
The following table lists the XPm_GetNodeStatus function arguments.
Table 1. XPm_GetNodeStatus Arguments
| Type |
Name |
Description |
| const u32 |
DeviceId |
Device for which status is requested
|
XPm_NodeStatus
*const |
NodeStatus |
Structure pointer to store device status
-
Status - The current power state of the device
-
For CPU nodes:
-
0 : if CPU is powered down,
-
1 : if CPU is active (powered up),
-
8 : if CPU is suspending (powered up)
-
For power islands and power domains:
-
0 : if island is powered down,
-
2 : if island is powered up
-
For slaves:
-
0 : if slave is powered down,
-
1 : if slave is powered up,
-
9 : if slave is in retention
-
Requirement - Requirements placed on the device by the caller
-
Usage
-
0 : node is not used by any PU,
-
1 : node is used by caller exclusively,
-
2 : node is used by other PU(s) only,
-
3 : node is used by caller and by other PU(s)
|
Returns
XST_SUCCESS if successful else XST_FAILURE or an error code or a reason code