WFI
Wait for Interrupt
WFI
Provides a hint to the implementation that the current hart can be stalled until an interrupt occurs.
Details
WFI (Wait For Interrupt) provides a hint to the implementation that the current hart can be stalled until an interrupt might need servicing. Implementations may simply implement WFI as NOP.
Pseudocode Operation
while(!Interrupt) { /* low power state */ }Example
WFI
Encoding
Binary Layout
0001000
31:25
00101
24:20
00000
19:15
000
14:12
00000
11:7
1110011
6:0