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PCI_IORead
Programmer's Reference Manuals
» Part 15 – SWI Calls
» PCI
» PCI_IORead
PCI_IORead
(SWI &50384)
| Entry | |
|---|---|
| R0 | PCI address |
| R2 | Access size (1, 2 or 4 for byte/half word/word) |
| Exit | |
|---|---|
| R0 | Preserved ? |
| R1 | Value read |
| R2 | Preserved ? |
Use
The purpose of this call is to perform an IO read cycle of the denoted size.
Notes
The PCI address used by R0 on entry can be found by calling PCI_HardwareAddress.
An IO write operation is performed by calling PCI_IOWrite.
See also
- PCI
- PCI Function Handles?
- PCI_HardwareAddress
- PCI_IOWrite